Pontiac - Race The next Level

          
Reply
 
Thread Tools Display Modes
  #141  
Old 02-28-2007, 10:52 AM
Matador-IV's Avatar
Matador-IV Matador-IV is offline
Senior Chief
 
Join Date: Jan 2006
Location: Woodward Ave.
Posts: 334
Default

Jim, Thank you for sharing.

I look forward to reading more about your engine as it progresses. It is obvious from the number of readers (#6700) that this thread is of interest to many many board members.

  #142  
Old 02-28-2007, 07:55 PM
NHRASuperStock455SD's Avatar
NHRASuperStock455SD NHRASuperStock455SD is offline
Ultimate Warrior
 
Join Date: Aug 2004
Location: Indy
Posts: 2,364
Send a message via AIM to NHRASuperStock455SD
Default

Quote:
Originally Posted by Jim Robertson
We felt an 750HP D port engine was doable a few years ago so we set out to build it.
Jim
Agree Jim,

When Phil Montheith built his SS 428 (for the Hatari SS car) with d-ports and 165 intake ccs, it ran 9.70 the very first run down the track. This was in bracket trim and 3250 lbs. His car always picks up a couple tenths when he puts it on kill. He was about 500 feet above sea level. (sea level would be about 9.65)

This was a very conservative engine with a mild port job and 16 head castings. It was about 12.5 to one compression. It went around 137mph.

Phil was very confident of 9.50's on kill. If I had to guess these heads MAX flowed 250-260 cfm and had a CSA of about 2 square inches.

If Phil had 320 cfm, 15 to one, what would it run? How much HP?

We are talking real world racing examples, not computer simulations or corrected dyno sheets. Phil's dyno is on the track.

We are doing a Big Pontiac with D-port heads. Cant wait till the heads are done.

Lynn

  #143  
Old 03-01-2007, 11:06 AM
JKrull66's Avatar
JKrull66 JKrull66 is offline
Chief Ponti-yacker
 
Join Date: Apr 2004
Location: Midland Tx
Posts: 849
Send a message via AIM to JKrull66
Default

For all the nay sayers I will add my 2 cents, I have set on the sidelines and enjoyed the spirited debate.

I will try to answer a couple things I know, again I am not getting in the middle, just passing on info. I do have a set of heads there currently looseing weight.

I guess it was like a quest for him, I was not there for the dyno session but I know of the dyno. It is at a well established engine shop in Abiline. That shop puts out a number of high dollar High HP engines. As far as Jim goes I have known him and of him for a couple of years. He has a full time job but does this in his spare time. Has has been selling sheetmetal intakes to Butler and others throughout the years. He has also done some out of house heads for them in the past.
As far as the heads go...I would guess more like lots & lots of hours, flowing grinding over and over. Serveral from this area wondered if they would fly apart on the dyno. But they did not. Lots of time and expense was put into the shortblock also. Don't forget a big vacuum pump and other goodies. He probably has a bundle in it, not counting time. But that was his deal a maximum effort Dport with stock (well modified) castings
John

__________________
Beers Bikes Babes and Pontiacs Rule!!!

63 Lemans in the 9's race
66 GTO HT Cruiser
06 Triumph Rocket III TURBO! 2300 CC Bad boy
KTM 525 Dirt Terrorizer
POLARIS 900 RZR
10 GMC SLT Duramax Haul anything anywhere
http://www.facebook.com/profile.php?...app_2392950137
  #144  
Old 03-03-2007, 02:59 PM
NHRASuperStock455SD's Avatar
NHRASuperStock455SD NHRASuperStock455SD is offline
Ultimate Warrior
 
Join Date: Aug 2004
Location: Indy
Posts: 2,364
Send a message via AIM to NHRASuperStock455SD
Default weather station calcuations

Quote:
Originally Posted by JOE ALLAN
SIR: You are correct.. In that weather if everything is rite then it is one hell of a motor, Now a question for you Lynn, you are a super stock racer so i think you understand weather correction factors....if you had a motor on a dyno say at a physical elevation of 1600' and the weather was 93 degrees - the humidity was 50% and the uncorrected barometer was 27.99.. what corrected altitude would this correct to by your numbers? Thank You for any response.........Joe Allan.................ps. not try'n to take anything away from anyone, just try'n to understand.

Just got our Computech weather station out. This unit is pretty accurate. As a base run we input a 9.85 run @ 3462 feet. This is an actual run at Joliet last summer. If we do the ET at a sea level run it would run 9.60. This calculates to 568HP for the 6X motor corrected to sea level.

Now lets put Jim's motor into our Grand Am with 685HP. This calculates to a 9.26@147mph. Now let us correct to sea level. [email protected].

The calculated HP 90 deg, 27.99, and 50% is 773HP from the actual dyno sheet corrected to sea level.

Lynn


Last edited by NHRASuperStock455SD; 03-03-2007 at 03:11 PM.
  #145  
Old 03-04-2007, 02:04 PM
65nss4spdGTO's Avatar
65nss4spdGTO 65nss4spdGTO is offline
Ultimate Warrior
 
Join Date: Apr 2006
Posts: 3,339
Default Super Stock Pontiacs

Lynn,

Since we are talking about high horsepower and head flow, what is the fastest a D-port head and round-port head pontiacs have gone is legal super stock?

  #146  
Old 03-04-2007, 04:14 PM
NHRASuperStock455SD's Avatar
NHRASuperStock455SD NHRASuperStock455SD is offline
Ultimate Warrior
 
Join Date: Aug 2004
Location: Indy
Posts: 2,364
Send a message via AIM to NHRASuperStock455SD
Default

65,

If you have an understanding of how Stock and Super Stock works, you undoubtedly know that fast is a very relative term. It depends on rated engine horsepower and car weight. (see below) This is how NHRA derives the index system. The attempt is to equalize cars relative to original engine HP and car weight.

Secondly, it depends on what kind of air as was a major topic of this thread. I have always been a proponent of correcting all runs to sea level to show relevance. As we have demonstrated, a run in Abilene verses a run at Gainesville with the same engine in the same car can be quite different. I have never run in air better than 2500 feet corrected. Taking my car to a track with air 1000 feet below sea level will be a much different experience.

Kenny Shaver's car is irrefutably the fastest D-port. Steve Smith, Carrol Warling, Billy Ingles, and Phil Monteith/Peter Biondo are very close. (Kenny's run below was about 121MPH, and the car normally runs about 127)

Round port engines I would say Don Kennedy with his 1.1 under performance just a few months ago.



3 Sep 2005, 11:03 PM

Super Stock Qualifying, Final Order


CLERMONT, Ind. - Final order after 4 rounds of qualifying in Super Stock at the NHRA POWERade Drag Racing Series, 51st annual Mac Tools U.S. Nationals:


Psn--Num--Class-Driver, Home Town, Machine-----------------ET---Index---(+/-)

1 3883 SS/KA Ken Shawver, Defiance OH, '78 Firebird 10.296 11.55 -1.254
2 3176 GT/IA Dave Layer, Dayton OH, '87 Camaro 10.287 11.50 -1.213
3 3036 GT/E Charlie Westcott, Parma MI, '99 Grand Am 9.602 10.80 -1.198
4 3226 SS/MA Zack Running, Lapeer MI, '82 Cutlass 10.958 12.15 -1.192
5 1748 GT/GA Byron Worner, Duncannon PA, '90 Camaro 10.038 11.20 -1.162
6 381 SS/NA Brian Olson, Peru IN, '88 Cutlass 11.303 12.45 -1.147
7 3388 GT/JA Mark Nowicki, Gaylord MI, '98 Avenger 10.453 11.60 -1.147
8 1116 SS/BA John Armstrong, Kingston NS, '69 Corvette 9.060 10.20 -1.140
9 7879 SS/BM Don Bevers, Tucson AZ, '91 Probe 8.560 9.70 -1.140
10 2900 SS/BM Michael Tueffel, Greensboro NC, '98 Grand 8.562 9.70 -1.138
11 3740 GT/FA Jeff Niceswanger, Zanesville OH, '86 Camaro 9.970 11.10 -1.130
12 391 GT/BA Irvin Johns, Charlestown IN, '02 Cavalier 9.429 10.55 -1.121
13 17 GT/DA Michael Iacono, Wading River NY, '89 Camaro 9.679 10.80 -1.121
14 6 SS/AX Tim Cole, Collierville TN, '96 Corvette 8.731 9.85 -1.119
15 372 SS/AA Jeg Coughlin, Delaware OH, '68 Barracuda 8.682 9.80 -1.118
16 55 GT/AA Gary Stinnett, Emporia KS, '92 Camaro 9.283 10.40 -1.117
17 5080 GT/HA Ted Romero, Denver CO, '98 Grand Am 10.233 11.35 -1.117
18 1227 GT/FA Michael Volkman, Moon PA, '00 Sebring 9.983 11.10 -1.117
19 364 SS/B Tony DePillo, Dayton OH, '64 Savoy 9.084 10.20 -1.116
20 311 SS/BA Eddie Smith, Sandyville WV, '69 Corvette 9.085 10.20 -1.115
21 3651 SS/AA Charlie Wescott Jr, Parma MI, '68 Barracuda 8.691 9.80 -1.109
22 32 SS/IA Jeff Dona, Gordonville MO, '69 Camaro 9.892 11.00 -1.108
23 19 GT/HA Tom Sheehan, Newell PA, '00 Sebring 10.248 11.35 -1.102
24 1798 SS/AA Bucky Hess, Bunker Hill WV, '68 Barracuda 8.704 9.80 -1.096
25 3131 GT/CA Ricky Decker, Charlestown IN, '94 Camaro 9.608 10.70 -1.092
26 3010 SS/K Robin Brown, Madisonville KY, '66 Chevy II 10.212 11.30 -1.088
27 2093 GT/KA Bob Dennis, Shorter AL, '95 Achieva 10.664 11.75 -1.086
28 1901 GT/IA Dennis Steward, Dover PA, '91 Daytona 10.414 11.50 -1.086
29 2428 GT/AA Andy Fogle, Norway SC, '04 Cavalier 9.315 10.40 -1.085
30 3989 SS/HA Bret Voges, Van Buren OH, '67 Nova 9.815 10.90 -1.085
31 4288 GT/JA Tony Cowell, Weatherford TX, '81 Camaro 10.527 11.60 -1.073
32 7854 SS/HA Ryan McClanahan, Alta Loma CA, '67 Camaro 9.828 10.90 -1.072
33 2458 SS/M Mike Cates, Milan TN, '64 Comet 10.830 11.90 -1.070
34 3992 GT/CA Bobby Rashid, Grosse Point MI, '82 Firebird 9.636 10.70 -1.064
35 1747 GT/JA Tim Worner, Duncannon PA, '88 Cutlass 10.539 11.60 -1.061
36 1707 GT/CA Jim Boburka, Coraopolis PA, '04 Cavalier 9.644 10.70 -1.056
37 3227 GT/HA Rock Running, Lapeer MI, '95 Achieva 10.295 11.35 -1.055
38 3332 SS/GA Todd Frantz, Louisville KY, '67 Chevy II 9.797 10.85 -1.053
39 4222 SS/AA Fred Henson, Madisonville TX, '68 Dart 8.747 9.80 -1.053
40 7426 SS/BA Chuck Rayburn, Castro Valley CA, '64 Belve 9.148 10.20 -1.052
41 6398 GT/DA Kevin Cour, Ladera Ranch CA, '04 Cavalier 9.749 10.80 -1.051
42 72 SS/AA Steve Wann, Modesto CA, '68 Barracuda 8.750 9.80 -1.050
43 1136 GT/FA Peter Biondo, Maspeth NY, '00 Firebird 10.053 11.10 -1.047
44 241 GT/TB Brad Allen, Winamac IN, '03 S-10 10.109 11.15 -1.041
45 3678 SS/HA Joe Bohannon, Sheperdsville KY, '67 Camaro 9.863 10.90 -1.037
46 389 SS/NA Dennis Ridgeway, Cerro Gordo IL, '88 Cutla 11.415 12.45 -1.035
47 1 SS/HA Larry Stewart Jr., Clinton MS, '67 Nova 9.869 10.90 -1.031
48 5206 SS/MA Carroll Warling, Arvada CO, '74 Grand Am 11.120 12.15 -1.030
49 107 SS/AS Wes Leopold Jr, Bridgeville PA, '93 Daytona 8.873 9.90 -1.027
50 3555 GT/MA Dave Boertman, Norton Shores MI, '97 Fireh 11.024 12.05 -1.026
51 300 SS/AM Chuck Gallagher, Holly MI, '94 Sunbird 8.428 9.45 -1.022
52 1108 GT/DA Gary Richard, Bay Shore NY, '01 Firebird 9.790 10.80 -1.010
53 3013 SS/KA Bob Harrison, Albion IL, '66 Nova 10.543 11.55 -1.007
54 31 SS/HA Steve Graham, Fulton IN, '67 Nova 9.897 10.90 -1.003
55 3161 GT/DA Dan Kyle, Lawrenceburg IN, '87 Firebird 9.801 10.80 -0.999
56 1638 SS/KA Ron Morehead, Newburgh NY, '85 Camaro 10.553 11.55 -0.997
57 215 GT/CA Joe LoCicero, Snellville GA, '88 Camaro 9.705 10.70 -0.995
58 27 SS/FA Blair Patrick, Jasper TN, '68 Mustang 9.757 10.75 -0.993
59 350 SS/AA Jim Pancake, Delaware OH, '68 Barracuda 8.808 9.80 -0.992
60 3575 SS/JA Don O'Malley, Decatur IL, '64 Corvette 10.309 11.30 -0.991
61 5 SS/HA Gary McGlasson, Los Lunas NM, '69 Camaro 9.909 10.90 -0.991
62 3122 SS/AA Joey Wilkes, Zanesville OH, '68 Barracuda 8.810 9.80 -0.990
63 63 GT/GA Sean Cour, Brush Prairie WA, '02 Firebird 10.214 11.20 -0.986
64 39 GT/H Gary Tompa, Saginaw MI, '84 Firebird 10.165 11.15 -0.985
65 1990 SS/AA David Barton, Robesonia PA, '68 Dart 8.819 9.80 -0.981
66 5724 GT/EA Chad Guilford, Highlands Ranch CO, '84 Cou 9.971 10.95 -0.979
67 7056 GT/AA Frank Grossi, Upland CA, '05 Sunfire 9.423 10.40 -0.977
68 3127 GT/JA Bill Sharpe, Louisville KY, '95 Achieva 10.625 11.60 -0.975
69 721 SS/AA Rick Houser, Pasadena CA, '68 Barracuda 8.827 9.80 -0.973
70 306 GT/CA David Tincher, Elizabethtown IN, '94 Caval 9.729 10.70 -0.971
71 2 SS/EA Dan Fletcher, Churchville NY, '69 Camaro 9.680 10.65 -0.970
72 2134 SS/L Everett Hill, Fayetteville GA, '64 Mustang 10.586 11.55 -0.964
73 4998 SS/F Red LeBlanc, Bartlett TN, '69 Mustang 9.686 10.65 -0.964
74 729 GT/CA Tony DeFrank, Chatsworth CA, '91 Calais 9.737 10.70 -0.963
75 3341 GT/EA Richard Doane, Dayton OH, '87 Camaro 9.988 10.95 -0.962
76 5424 SS/HA Ron Parness, Conifer CO, '67 Chevy II 9.939 10.90 -0.961
77 5300 SS/IA Al Corda, Elk Mound WI, '02 Firebird 10.042 11.00 -0.958
78 1192 GT/DA Bob Hochrun, Colonia NJ, '87 Camaro 9.842 10.80 -0.958
79 1954 SS/AA Bob Wolkwitz, Darien CT, '68 Dart 8.842 9.80 -0.958
80 1574 GT/BA Frank Maiolo, Mt. Vernon NY, '00 Grand Am 9.595 10.55 -0.955
81 3154 SS/J Gary Russell, E. Sparta OH, '98 Camaro 10.147 11.10 -0.953
82 5440 SS/K Gene Bichlmeier, Norkfolk NE, '66 Chevy II 10.350 11.30 -0.950
83 2018 SS/C Jimmy Bridges, Nashville TN, '66 Corvette 9.407 10.35 -0.943
84 3378 GT/BA Chuck Bohannon, Valley Station KY, '98 Ach 9.614 10.55 -0.936
85 23 GT/CA Robert Burgin, Cuthbert GA, '02 Firebird 9.765 10.70 -0.935
86 3516 SS/AA Darrell Marvel, Big Rapids MI, '68 Barracu 8.865 9.80 -0.935
87 3658 SS/FA David Haag Sr, Memphis IN, '67 Camaro 9.818 10.75 -0.932
88 3 GT/EA Lincoln Morehead, Marlboro NY, '87 Camaro 10.023 10.95 -0.927
89 3012 SS/HA Jeremy Duncan, Charlestown IN, '69 Camaro 9.979 10.90 -0.921
90 2700 GT/BA Shane Carr, Hendersonville TN, '94 Achieva 9.629 10.55 -0.921
91 324 SS/BA Brandon Wilkinson, Bowling Green KY, '69 C 9.294 10.20 -0.906
92 5830 GT/LA Dennis Nelson, Hugo MN, '80 Malibu 10.953 11.85 -0.897
93 2302 SS/CA Ken Schindler, Hendersonville TN, '71 Corv 9.453 10.35 -0.897
94 797 GT/AA Joe Kohorst, Grand Terrace CA, '92 Camaro 9.507 10.40 -0.893
95 2816 SS/HA Russell Fox, Springfield TN, '66 Chevy II 10.011 10.90 -0.889
96 66 SS/BM Brad Plourd, Covington WA, '99 Grand Am 8.815 9.70 -0.885
97 327 GT/CA Mike Beachy, Kokomo IN, '82 Firebird 9.818 10.70 -0.882
98 2963 GT/CA Don Barber, Hohenwald TN, '04 Cavalier 9.818 10.70 -0.882
99 3054 SS/EA Rusty Perkins, Bowling Green KY, '70 Corve 9.773 10.65 -0.877
100 21 SS/DA Stan Perry, Nashville TN, '69 Camaro 9.626 10.50 -0.874
101 351 GT/TD Wayne Hansen, Wabash IN, '03 S-10 10.734 11.60 -0.866
102 3000 SS/BM Chuck Gallagher Jr., Defiance OH, '90 Cama 8.834 9.70 -0.866
103 2040 SS/D Ken Vaughn, Columbia TN, '68 Camaro 9.635 10.50 -0.865
104 2016 SS/I Jack Huff, Nashville TN, '66 Corvette 9.990 10.85 -0.860
105 54 SS/CS Michael Mans, Rogers MN, '00 Formula 9.791 10.65 -0.859
106 5200 SS/DM Abe Loewen, Regina SK, '98 Grand Am 9.343 10.20 -0.857
107 5333 SS/AA Randy Hopkins, Cable WI, '68 Dart 8.944 9.80 -0.856
108 3155 GT/C Victor Krol, South Bend IN, '85 Mustang 9.646 10.50 -0.854
109 312 SS/AA Mike Smith, Sandyville WV, '68 Barracuda 8.960 9.80 -0.840
110 4426 SS/AA Joe Teuton Jr., Gray LA, '68 Barracuda 8.964 9.80 -0.836
111 5651 SS/AA Rick Johnson, Litchfield MN, '68 Barracuda 8.965 9.80 -0.835
112 3038 SS/LA Alex Denysenko, Lyons IL, '65 Mustang 10.921 11.75 -0.829
113 46 SS/BM Kevin Helms, Mineola TX, '95 Achieva 8.871 9.70 -0.829
114 5088 SS/EA Mike Bogina, Olathe KS, '70 Barracuda 9.822 10.65 -0.828
115 2333 GT/EA Grace Howell, Aiken SC, '95 Mustang 10.123 10.95 -0.827
116 3508 SS/CA James Vester, Carlisle IN, '69 Camaro 9.532 10.35 -0.818
117 7312 SS/HA George Stassi, Brea CA, '67 Camaro 10.093 10.90 -0.807
118 1152 SS/AA Steve Baughman, York PA, '68 Barracuda 9.004 9.80 -0.796
119 5502 SS/G Paul Anderson, Lewiston MN, '67 Camaro 9.967 10.75 -0.783
120 1979 SS/AA John Baughman, York PA, '68 Dart 9.022 9.80 -0.778
121 34 GT/K Brad Zaskowski, Grand Rapids MI, '87 Camaro10.623 11.40 -0.777
122 3410 SS/AA Randy Warford, Nashville IN, '68 Barracuda 9.039 9.80 -0.761
123 3063 SS/N Steve Hinton, Bowling Green KY, '55 Chevy 11.501 12.25 -0.749
124 5275 SS/TA Max Tafoya Jr, Albuquerque NM, '02 S-10 9.486 10.20 -0.714
125 7799 SS/H John Calvert, Lancaster CA, '68 Mustang 10.133 10.80 -0.667
126 1103 SS/FM Ed Matsko, Mt. Pleasant PA, '69 Camaro 10.206 10.80 -0.594
127 238 SS/E Charles Ledbetter, Murfreesboro TN, '68 Ca 9.988 10.55 -0.562
128 3898 SS/TC Donnie Fuller, Louisville KY, '96 Dakota 10.241 10.80 -0.559

------------ Alternates ------------

1 337 SS/AA Dean Mink, Cincinnati OH, '68 Barracuda
2 7 GT/IA Mark Faul, Tacoma WA, '98 Grand Am
3 138 SS/AA Wendell Howes, Rathesay NB, '68 Barracuda
4 3157 SS/CA John Nemeth, Hamilton IN, '71 Corvette
5 2067 SS/JA Scot La Mar, Hawthorne FL, '69 Camaro
6 2916 SS/AA Johnny Kelley, Walhalla SC, '68 Barracuda
7 3350 SS/JA Wayne Workman, Ft. Wayne IN, '75 Corvette
8 205 SS/AA John Gifford, Naples FL, '68 Barracuda
9 303 SS/AA Gary Jacob, Shelby Twp MI, '68 Dart
10 4406 SS/AA Jim Hale, Van Buren AR, '68 Barracuda
11 1968 SS/AA Chuck Comella, Lyons NY, '68 Dart
12 720 SS/AA Dave Raybourn, Modesto CA, '68 Barracuda

  #147  
Old 03-04-2007, 08:58 PM
65nss4spdGTO's Avatar
65nss4spdGTO 65nss4spdGTO is offline
Ultimate Warrior
 
Join Date: Apr 2006
Posts: 3,339
Default

Lynn,

I have good understanding of the class, I'm amazed by the performance levels that are achieved. I know it's all based on the engine factors by NHRA. So the question is, who is making the most HP with a D-port and a R-port and how much is it? Has anyone had any luck with the 1970 455 HO or is the factor just too high in comparision to the high compression 428?

  #148  
Old 03-04-2007, 11:48 PM
NHRASuperStock455SD's Avatar
NHRASuperStock455SD NHRASuperStock455SD is offline
Ultimate Warrior
 
Join Date: Aug 2004
Location: Indy
Posts: 2,364
Send a message via AIM to NHRASuperStock455SD
Default

65,

I asked and received from NHRA a reduction of all 1970 455's in Super Stock. They are now rated 335HP. We normally double that number to see what HP is required to make a SS car go 1 second under the index as a general rule of thumb.

This means 670HP so it is up to you. The 428 is similarly is 320 rated only requiring 640HP. NHRA listed the 428 as a flat top piston, but we all know the truth. This resulted in a combo that has a MAX CR with no valve reliefs at 13.2 to one compression. With valve reliefs more realistically 12.5 to one way higher than the 70 455HO

428 is the softest Pontiac in SS due to two huge mistake by NHRA. A much better combo than the 1970 455 currently. The 455 will have a stroke that is much more limited on intake port size than the 428, and much less compression.

As to the HP, I am not privy to everyone's dyno sheets, but I just listed who the fastest cars are as they are listed in the public domain.

Lynn


Last edited by NHRASuperStock455SD; 03-04-2007 at 11:54 PM.
  #149  
Old 03-05-2007, 11:29 PM
JOE ALLAN JOE ALLAN is offline
Senior Member
 
Join Date: Jan 2002
Posts: 159
Default

Lynn: Thanks for get'n back to me with that info, Jim will have a hard time run'n the et because he's one of them 10.5" tire guys......If he's got the power he claims he'll have a hell of a time try'n to hook, I just got back from the races this weekend, talk about cold and windy but lots of fun....Later Joe

  #150  
Old 03-06-2007, 01:49 AM
goquick's Avatar
goquick goquick is offline
Suspended
 
Join Date: May 2006
Location: Missouri
Posts: 2,905
Default

Lynn,
Does the 428 block code such as say a YH small valve block have to use the small valve heads or could it be used with say #16's?

  #151  
Old 03-07-2007, 12:50 AM
NHRASuperStock455SD's Avatar
NHRASuperStock455SD NHRASuperStock455SD is offline
Ultimate Warrior
 
Join Date: Aug 2004
Location: Indy
Posts: 2,364
Send a message via AIM to NHRASuperStock455SD
Default

Goquick,

We are talking race cars right? There has always been an argument about blocks with notches or leaving them out for the additional compression. I favor the opinion that notches to improve flow does better than the additional compression. Pontiac engineers did this for a good reason. If you take a bare block, bolt your heads to it and look up the cylinder wall at the intake valve it will scare you to death. It did me.

We all go 60 overbore anyway, and we usually offset bore the blocks to relieve intake valve shrouding. Of course you have to start with a standard bore block the get the most and check the cylinder wall thickness.

Many of us do 8 sleeves like the motor sitting on my engine stand. You must also hard block them all.

Lynn

  #152  
Old 03-07-2007, 02:14 AM
goquick's Avatar
goquick goquick is offline
Suspended
 
Join Date: May 2006
Location: Missouri
Posts: 2,905
Default

The reason I asked is that I have a couple yh code 428's and wondering if in the right car it could be made competitive with the larger valve heads.

  #153  
Old 03-07-2007, 12:18 PM
johnta1's Avatar
johnta1 johnta1 is offline
Ultimate Warrior
 
Join Date: Feb 2001
Location: now sunny Florida!
Posts: 22,516
Default

I don't believe the codes matter, just the bore, stroke and main bearing size for the appropiate engine.

Example: 428 would need 4.12" bore, 4" stroke and 3.25" main block.

__________________
John Wallace - johnta1
Pontiac Power RULES !!!
www.wallaceracing.com

Winner of Top Class at Pontiac Nationals, 2004 Cordova
Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats

KRE's MR-1 - 1st 5 second Pontiac block ever!

W.E.C moment


"Every man has a right to his own opinion, but no man has a right to be wrong in his facts."

"People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates
  #154  
Old 03-07-2007, 04:42 PM
goquick's Avatar
goquick goquick is offline
Suspended
 
Join Date: May 2006
Location: Missouri
Posts: 2,905
Default

So my next question would be what if the 428 was put in a new body, such as the cobalt? (well, they let chevies get put iin Pontiacs!)

  #155  
Old 03-08-2007, 12:16 PM
NHRASuperStock455SD's Avatar
NHRASuperStock455SD NHRASuperStock455SD is offline
Ultimate Warrior
 
Join Date: Aug 2004
Location: Indy
Posts: 2,364
Send a message via AIM to NHRASuperStock455SD
Default

Quote:
Originally Posted by goquick
The reason I asked is that I have a couple yh code 428's and wondering if in the right car it could be made competitive with the larger valve heads.
Agree with johnta1. NHRA has the bores listed at 4.125. They also just released the new ruling that you can go 75 over instead of 70.

Depending on your wall thickness, I would go 4.195 bore. The 428 engine is probably the best Pontiac ever made.

Lynn

  #156  
Old 03-08-2007, 12:29 PM
NHRASuperStock455SD's Avatar
NHRASuperStock455SD NHRASuperStock455SD is offline
Ultimate Warrior
 
Join Date: Aug 2004
Location: Indy
Posts: 2,364
Send a message via AIM to NHRASuperStock455SD
Default

Quote:
Originally Posted by goquick
So my next question would be what if the 428 was put in a new body, such as the cobalt? (well, they let chevies get put iin Pontiacs!)
We are doing a big D-port engine for the new Grand Am. It will run GTAA with an index of 10.40. We are confident it will make upwards of 700HP. Been waiting over 2 years on the heads.

Not sure if a Cobalt would work. Of course you would pick the Pontiac version wouldnt you? The big problem is carb spacer on the new cars which is a must on our Pontiacs.

The GrandAm had a Ram Air hood, so that is why we went with that. Of course it also was given to us by Pontiac Racing.

The least expensive way to get a light SS GT car is to buy my Sunbird and keep about $80k in your pocket.

Lynn

  #157  
Old 03-08-2007, 09:06 PM
goquick's Avatar
goquick goquick is offline
Suspended
 
Join Date: May 2006
Location: Missouri
Posts: 2,905
Default

LYNN,
The cobalt idea is a "stick it in your chevy loving face" thing I love to do. Kind of my way of payback to all the idiots who put a chevy in their Pontiacs over the years. Of course, if I could get away with it, a 69 rs/ss camaro or a 67 chevelle that originally a ss 396 4 gear would be fun with a Pontiac engine too. Of course I did about 17 years ago fix a 68 ss 396 chevelle with a Pontiac 400 from a wadded up 69 GTO. over rated 396 best e.t. was high 13's, and with the Pontiac 400 I ran 13.02. Not bad for a stock engine and headers. The 396 had exactly same type set up, stock, & headers.

  #158  
Old 03-08-2007, 09:28 PM
Wareagle's Avatar
Wareagle Wareagle is offline
Ultimate Warrior
 
Join Date: Jan 2005
Location: Canada
Posts: 2,631
Smile

Quote:
Originally Posted by goquick
LYNN,
The cobalt idea is a "stick it in your chevy loving face" thing I love to do. Kind of my way of payback to all the idiots who put a chevy in their Pontiacs over the years. Of course, if I could get away with it, a 69 rs/ss camaro or a 67 chevelle that originally a ss 396 4 gear would be fun with a Pontiac engine too. Of course I did about 17 years ago fix a 68 ss 396 chevelle with a Pontiac 400 from a wadded up 69 GTO. over rated 396 best e.t. was high 13's, and with the Pontiac 400 I ran 13.02. Not bad for a stock engine and headers. The 396 had exactly same type set up, stock, & headers.
Now that would be cool--some guy winning the SUPER STOCK Championship in a Pontiac powered Cobalt.

  #159  
Old 03-09-2007, 12:32 AM
NHRASuperStock455SD's Avatar
NHRASuperStock455SD NHRASuperStock455SD is offline
Ultimate Warrior
 
Join Date: Aug 2004
Location: Indy
Posts: 2,364
Send a message via AIM to NHRASuperStock455SD
Default

Dont Laugh!

Under the new SSGT rules you can run any car with any corporate motor and run it as a GT car. NHRA eliminated the year restrictions on GT cars. You can run a Cobalt, a 69 Chevelle, what ever you want with a Pontiac, Olds, Cadillac, Buick.

A 69 Chevelle with a 428 would be a killer combo.

Lynn

  #160  
Old 03-09-2007, 07:43 AM
goquick's Avatar
goquick goquick is offline
Suspended
 
Join Date: May 2006
Location: Missouri
Posts: 2,905
Default

Didn't realize I could run a 60's chevy body. Think they would like seeing POWERED BY PONTIAC because chevy engines are for slowpokes across a fender?

Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 09:11 AM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017