#161  
Old 10-06-2022, 06:23 PM
ta man ta man is offline
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Thanks..I will check them out..there are a few other valvespring setups like this with no issues but nice to double check.

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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471

Last edited by ta man; 10-06-2022 at 06:36 PM.
  #162  
Old 10-06-2022, 06:40 PM
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Quote:
Originally Posted by ta man View Post
Thanks..I will check them out..there are a few other valvespring setups like this with no issues but nice to double check.
Not saying it's an issue but worth checking. Since you put 3.73 gears in and your now spinning it high and in the higher rpm range more but have lost hp/mph it's seems like a place to look.

  #163  
Old 10-06-2022, 06:58 PM
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About 15 years ago, 70 GTO , 3780 race weight.
12.4:1 462, 270/280@ .050 solid roller .660 lift. .Victor intake with 2" Super sucker. Race ported Es.T400/ 8" PTC 4500 stall/ 411 gear. Consistently ran 6.6@ 102 1/8 mile.
Changed the 2" Super Comp to 1 -3/4 Hedman Hustler, lost .2 (6.8) in the 1/8. Also noticed that the engine rpm worsened. Changed back to the Super Comp and picked up the time.


Last edited by 68WarDog; 10-06-2022 at 07:08 PM.
  #164  
Old 10-06-2022, 11:08 PM
ta man ta man is offline
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Originally Posted by slowbird View Post
Not saying it's an issue but worth checking. Since you put 3.73 gears in and your now spinning it high and in the higher rpm range more but have lost hp/mph it's seems like a place to look.
Well it's what I'm thinking is something is off or holding it back.

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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
  #165  
Old 10-07-2022, 08:28 AM
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Theoretical rpm across the line with 3.08 gears and 125.64 mph is 4644 rpm, actual at 5300 rpm = 14% slip.
Theoretical rpm across the line with 3.73 gears and 124.60 mph is 5577 rpm, actual at 5850 rpm = 4% slip.

These are calculated without assuming tire growth.

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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
  #166  
Old 10-21-2022, 01:22 PM
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Heading to the dragstrip Saturday. I believe Andy and a few other local Pontiac guys are coming as well.
I normally always just make one change but time is running out this year, so I made quite a few little changes since last outing.
Retarded the cam 2 degrees hoping to shift the power curve up and gain some horsepower up top.
Installed a new set of Hyd lifters I had on the shelf, had the odd ticker now and then. (maybe bleeding down slightly?)
Went back to 10w30 vs the 15w /40 oil. It is cooler now so I don't want the thicker oil takes too long to thin out.
Dropped oil volume down 1/2 quart and may go another 1/2 to avoid windage problems.
Set up the engine to use either a one inch or 2 inch spacer and also built a new airpan assembly for the 2 inch. I currently have a 2 inch HVH Super Sucker tapered 4 hole spacer on the engine.
Weather looks good and as long as we don't have a strong headwind should be a good day.
I'm hoping all the little changes are a step in the right direction.

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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471

Last edited by ta man; 10-21-2022 at 01:27 PM.
  #167  
Old 10-21-2022, 01:28 PM
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Air Pan picture

Sent from my BBF100-2 using Tapatalk

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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
  #168  
Old 10-21-2022, 02:16 PM
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Sounds like a well thought out strategy. Good luck!

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  #169  
Old 10-21-2022, 02:29 PM
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What brand lifters you install?

  #170  
Old 10-21-2022, 03:36 PM
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Quote:
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What brand lifters you install?
A set of Comp 857's that I had..they are different then my first set.

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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
  #171  
Old 10-21-2022, 08:19 PM
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Are they the newer ones or the older ones with the lower oil band?

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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
  #172  
Old 10-21-2022, 11:47 PM
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Go, Ernie. Go!!!!

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  #173  
Old 10-22-2022, 07:17 AM
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Quote:
Originally Posted by AG View Post
Are they the newer ones or the older ones with the lower oil band?
Newer with the higher oil band.

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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
  #174  
Old 10-22-2022, 11:52 AM
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OCMDGTO OCMDGTO is offline
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Good luck TA! I'm surprised to hear you are using a 4 hole spacer, you ever try an open one?

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69 GTO Liberty Blue/dark blue 467, 850 Holley, T2, Edelbrock Dport 310cfm w Ram Air manifolds, HFT 245/251D .561/.594L, T400, 9" w 3.50s 3905lbs 11.59@ 114, 1.57/ 60'
  #175  
Old 10-22-2022, 12:33 PM
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Weather looks great up there today with a healthy tail wind. Should be interesting.
Best conditions are this time of the year and the tracks around here closed for the season already.

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68 GTO,3860#
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Old combo:
462 10.75 CR,,SD 330CFM Round Port E's,Old Faithful cam,Jim Hand Continental,3.42's.
1968 Pontiac GTO : 11.114 @ 120.130 MPH

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517 MR-1,10.8 CR,SD 350CFM E's,QFT 950/Northwind,246/252 HR,9.5” 4000 stall,3.42's
636HP/654TQ
1.452 10.603 @ 125.09
http://www.dragtimes.com/Pontiac-GTO...lip-31594.html
  #176  
Old 10-22-2022, 08:48 PM
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Quote:
Originally Posted by OCMDGTO View Post
Good luck TA! I'm surprised to hear you are using a 4 hole spacer, you ever try an open one?
I usually use a one inch open, after the track results Id like to try a 1.5 and a 2 inch open..the 2 inch supersucker was out performed today by the one inch open..

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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
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  #177  
Old 10-22-2022, 08:51 PM
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Originally Posted by TCSGTO View Post
Weather looks great up there today with a healthy tail wind. Should be interesting.
Best conditions are this time of the year and the tracks around here closed for the season already.
Was actually warmer then we expected but pretty good air..temps were 16 to 20 degrees Celsius but we had a headwind..so that hampered the times slightly.

Andy ran a new best of 10.76 I managed a 10.78..will post my timeslip when I have more time to add to the post.
I did gain more mph even with the headwind..so a positive result.

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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
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  #178  
Old 10-23-2022, 09:59 AM
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Correction Andy ran a 10.69

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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
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  #179  
Old 10-23-2022, 10:12 AM
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We had a great day . I’m just thrilled…. Best part is not breaking anything and driving home.

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  #180  
Old 10-23-2022, 10:43 AM
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What track were you running on?

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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile
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