Where did you guys see 3800@11.92 ....... if it was Johns car, I think he is quite a bit lighter than that. I'd love to have my hulk do that...... but I am just happy to keep it doing 13's and not breaking. :grin:
There is no link to the 11.92 run . Its my car , sitting in storage until I get over back surgery . The motor is 350 stock bore with full flat top pistons . cap screw rods , heads are cleaned up and angle milled with a good 5 angle valve job ,Poston cam and intake , 800 cfm Qjet very reworked , 2 1/2 mandrel bent exhaust , 3000 converter and 4.10 rear gear .
The good old 74 apollo went 11.66 at Indy this fall. 750QJ carb. Stock intake with stock trw 10.25 pistons. Car weighed 3620. Yip. its real.
So, SS TRUCK, what kind of MPG do you get on the street? Better than a BB I would think. Whats the HP outta your 350? Was it a 315HP engine to start with?
The block assembly started as a 2bbl motor . The heads have had the big valves put in and angled milled with a mild clean up . The rotating assembly was lightened and balanced with forged flat top pistons . Poston cam and intake , very highly worked Q-jet , ignition is Pertronix . Thats about all it is to it . Exhaust is 2 1/2 mandrel bent and rear gear is 4.10 . As far as gas milage goes , I never really checked it . As long as I keep my foot easy on the loud pedal the gas milage is not too bad . I worked the carb to be a little lean on the primary side and fat on the secondary . Any more questions just PM me and I will try to be helpful .
11.92 in the 1/4 mile with a 3980 lb Skylark 350, poston cam, 3000 stall, 4.10 gear, no power adders or head porting? I'm guessing large cam, race fuel and you're spinning it close to 7K There's quite a few 455 guys that would like to be that fast
It is impressive that he did it with only minor cleanup on the heads. Most 455's have a hard time getting into the 11's with stock heads at that weight.
Like I said before. It took me a 125 shot of Nitrous to go 11.81. I have 373 gears 10.6 compression, large valve with ported heads with a TA intake, Forged pistons, Holley 750 dbl pump, GS club Pop Mech. cam, 3000 stall conv, that was a 3500 stall conv. with the 350 trans. I have ran a best of 13.31 on the motor. I weigh 3800 with me in it. So what gives, The guys that are getting 500hp with 350 Buick have a lot of head work on them and I have only read about maybe 3 on here. I think someone got about 550 horse with that special singlplane intake. Am I correct on this? Now tell us the whole story.
""Like I said before. It took me a 125 shot of Nitrous to go 11.81. I have 373 gears 10.6 compression, large valve with ported heads with a TA intake, Forged pistons, Holley 750 dbl pump, GS club Pop Mech. cam, 3000 stall conv, that was a 3500 stall conv. with the 350 trans. I have ran a best of 13.31 on the motor. I weigh 3800 with me in it. So what gives, The guys that are getting 500hp with 350 Buick have a lot of head work on them and I have only read about maybe 3 on here. I think someone got about 550 horse with that special singlplane intake. Am I correct on this? Now tell us the whole story."" Location: Ravenna, Ohio "Apples" ""Mine is a Skylark weighing 3980 @ 11.92"" Location: Mobile,Ala. "Oranges" ""What was the altitude when you make the run?"" Take your car to Mobile,Ala and you can run 11.80's without nitrous as well. or have the ala. guy come to Ohio and see how fast his car is. Get it? DA! Dan
Elevation at Norwalk Raceway Park is 800 ft above sea level. Not really that high. I am just looking for more info on the motor thats all. The flat top pistons sound interesting. I wonder who had those. Those probably make more power. I wonder what the compression is or if all race gas is used. My motor was put together back in 1993 with a lot of TA parts. I had a Buick engine builder do the motor. At That time I used the TA 510 cam I had 395 hp and 370 tq on the dyno. I did need more gear with the cam so I downsised the cam. TA has some new cams now and I would like to try one smaller than the 510. The pop Mech cam does give up at around 5800 rpm. The 510 cam would run to 6200.
You guys with these Sbb's running high 11's, can you offer the cam grind specs? Gotta go FASTER! :grin: Thanks,Mart
Take a look at the Poston 118 . Works good for me . Comes in strong about 2500 and pulls great to 5800 . Have turned it highed ,but 5800 is a good shift point
I would keep the LC tight between 108-111L/C for the 350 or it will need a 5000 stall to get moving. The 118 L/C kills cylinder pressure which cost alot of bottom end since the intake valve is closing so late and the exhaust is opening far too early blowing off pressure on the power stroke. A 110 L/C cam with the same specs will run circles around it. I'm not saying the cam doesn't work, just leaves some power on the table. Even though it is only 8 degrees difference on the L/C number, it is 16 degrees difference since each(intake and exhaust) lobe center is moved 8 degrees. 8+8 =16.
