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#1
10-02-2014, 06:22 AM
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Haven't weighed this car yet..the old one was right at 3900 lbs with me in it..This one may be 100lbs lighter..I will weigh it soon I'm curious.
Most likely going again Oct 10th to the track to test again..it will be cooler as long as there is some track prep that night should be faster! |
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#2
09-29-2014, 05:32 PM
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3.08...SWEET!
My 455 RAIV cam(stk 87 E-hds/10.2cr) combo(3550 lb), 10" 3500 stall with 3.42's and "to tall" tires ran 12.0 @ 114 mph on a "ok day". Was gon'a put in 3.73's. Re-think'n that unless go more CR and cam.
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If you cant drive from gas pump to gas pump across the map, its not a street car. http://s207.photobucket.com/albums/b...hop/?start=100 |
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#3
09-30-2014, 06:27 AM
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I would upgrade to the 1350 yokes when you have the new driveshaft made so you sleep better at night. I did this many years ago and the driveshaft has been fine. It still loosens up the rear U-joint after a couple of years of drag racing, putting a new one it before the next outing as it has developed about .010" of end play.
Even with more gear and converter there isn't a lot of improvements waiting with this particular combination, IMHO. I've already ran over 121mph with mine in good air and the engine was only turning just past 5000rpm's. When I did the tire swap from 28" to 26" tires a few years ago, NOTHING improved anyplace other than I picked up nearly 300rpms on the top end of the track. Sure gear AND converter would improve 60' times if you can get it to hook, which may be worth a couple tenths in ET at about the same MPH. It wouldn't be nearly as fun to drive on the street and is not worth the trade-off. My car acts and drives like a 15 second car till you get to the track, smooth idle, strong off idle and PLENTY of power in the "normal" driving range. Seldom any need to rev the engine beyond 2400rpm's or so to keep up with traffic. The power from this particular combination is more "locomotive" like with no real rush of power anyplace, it just pulls really hard from the instant you load the engine will you decide to shift it. It's a proven combination, very impressive, and quite popular as it should be.......Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#4
10-01-2014, 08:26 AM
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Cliff,
How much stall on the converter? |
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#5
10-01-2014, 11:49 AM
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I've had a Mallory 140 on my 78 for well over 20 years since they first came out. Had to replace it once. Street and track driven. Quiet pump.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune [email protected] 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs 1964 Corvette Coupe 327 4 speed |
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#6
10-01-2014, 06:33 PM
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Yes a regulator for sure!My pump is pretty quiet..no issues I did replace the pump last year with a spare I had..the new one is an older design that you can just pull the brushes out if needed.My fuel pressure at the end of the track is a rock solid 6.5....But it is still a deadhead system..I may put a return on it this winter or buy a Magnafuel that has a return on the pump.
One of the gains that had on this combo was going from stock pickup 3/8 lines Holley Blue to a 1/2 inch RobbMc,Mallory 140 all 8AN lines..car used to run 114mph's went to steady 116's after fuel system change... Last edited by ta man; 10-01-2014 at 06:43 PM. |
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#7
10-01-2014, 07:43 PM
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super results. Your combo is definitely dialed-in for efficient fun Street-Strip use.
my 12.0 & 11.0 ET signatures both required an early (5000-5200RPM) 1-2 upshift and imthink 2-3 as well. When to 60foot was there, these "early" upshifts made the difference in 12.2's being12.0's same for hitting 11.0's . fun to known the 12.0 ET was 4950 RPM at the big end. Fact was:same engine/converter/TH400/driver. Differnt carb/intake/Gear&tire/car. So i assume that the 5200 upshift allowed the converter to fall back into TQ multiply mode. Wishing my 3.54:1 could be closer to a 3.08:1
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95 Towncar that needs more TQ. Sold 2023: 12.24/111.6MPH/1.76 60'/28"/3.54:1/SP-TH400/469 R96A/236-244-112LC/1050&TorkerI//3850Lbs//15MPG/89oct Sold 2003: 12.00/112MPH/1.61 60'/26"x3.31:1/10"/469 #48/245-255-110LSA/Q-Jet-Torker/3650Lbs//18MPG 94oct Sold 1994: 11.00/123MPH/1.50 60'/29.5"x4.10:1/10"/469 #48/245-255-110LSA/Dual600s-Wenzler/3250Lbs//94oct |
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#8
10-02-2014, 07:51 AM
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"Cliff,
How much stall on the converter?" I have the old reliable "Jim Hand" 10" unit. Mine flashes to right to 3400-3500rpm's on a hard run with traction. This is just a tad higher than most folks see, but every converter I've had in this car, even the 13" unit flashed pretty high. Might be because of how hard my engines "hit" the converter, the tune on them is pretty decent, and they are built to make a TON of low end power, with super-quick throttle response right off idle, etc. It's amazing how well these Continental converters are "locked-up" on top end. I go thru just past 5000rpms at over 120mph, which on the calculator shows very little slippage at all. Most converters of this type will show 400-600rpms slippage on top end, some even more. Mine is less than 150rpm slippage when I do the math on it.......Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#9
10-02-2014, 03:01 PM
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This is a shot from a 1.7119 60 ft..the other two were 1.66's...only three way adjustable shocks nothing else.Not a bad launch for 3.08's...
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#10
10-02-2014, 08:07 PM
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Quote:
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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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#11
10-03-2014, 05:16 AM
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Quote:
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#12
11-28-2014, 02:36 AM
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New Best still with 3.08 gears
Consider me "old fashioned", but the brain still has a hard time understanding these ET's and MPH with the rear gear ratio advertised! What horsepower would you have to have with 3.08's and the ET's listed??
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#13
11-28-2014, 05:16 AM
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Torque is really what does the job!Its really the head cam package by SD performance..that gets the credit..I've done a few tweaks but could still have a better setup,my heads are still 85 cc's,non ported torker 2 intake,machine shop 462 with cast rods and heavy TRW pistons!I'm also still not satisfied with the carb tune and settled on the ignition curve.
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#14
10-02-2014, 08:44 PM
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This car without a doubt belongs in the 'Pontiac Street Car Hall of Fame', right alongside Cliff Ruggle's Ventura, Darby Otto's Grandville and of course Jim Hand's LeMans wagon.
Amazingly quick quarter-mile performance with a 3.08 gear in a heavy street car, can't wait to see the next installment as you further tune it and refine it. Curious to know the fuel consumption on the trip to and from the track, I'd bet it could pull down close to 15 MPG. I recall reading in the H-O Racing catalog that the 455/TH400/3.08 combo was their favorite street combo, now we all know why. |
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#15
10-03-2014, 05:20 AM
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Quote:
Fuel mileage was decent the last time I only stopped once to bring the tank up to 3/4 15 miles before the track... My buddys car Torquewar's is very impressive in itself..he is usually there running too...stock appearing 78 Trans Am with a quadrajet running the same times at 120mph! Last edited by ta man; 10-03-2014 at 05:28 AM. |
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#16
10-06-2014, 04:29 AM
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Weather permitting..heading to the track again for some testntuning...this Friday.
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#17
10-06-2014, 11:02 AM
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I didn't find it in this tread (sorry if I overlooked it) but what diameter tire are you running?
I'm curious since I'm running a 3.08 with 26" tires now consider the switch to 28". 
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#18
10-06-2014, 12:04 PM
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More folks should do photo albums as part of their' profile....
.
__________________
. 1970 GTO Judge Tribute Pro-Tour Project 535 IA2 http://forums.maxperformanceinc.com/...d.php?t=760624 1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car https://forums.maxperformanceinc.com...ght=procharger Theme Song: http://www.youtube.com/watch?v=7zKAS...ature=youtu.be |
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#19
10-06-2014, 03:20 PM
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Quote:
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#20
10-06-2014, 04:00 PM
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Thanks TA Man. 28" it will be.
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