I was wondering if anyone knew about what my car would run in the 1/4. I never took it to the track with the stock gear because I never had a fuel pump that could handle the power, but this year I will have a '70 455, freshly rebuilt(3000-5000miles), .030 over, forged internals, mild cam, mild port on heads, TA shorty headers with 2.5" exhaust, Edelbrock B4B intake, 750 quadrajet carb(brand new) and a 3.42 posi rear end. Any information would be appreciated.
Thanks, I was just wondering how big of a difference the gearing makes, I was right next to my friend in his Camaro that ran 14.5, from about a 40 mph roll, that was last summer when I had the stock gearing(2.73 I believe) stock exhaust manifolds, 2.25" exhaust, stock intake and carb(Carb had over 150K on it). I think the guy who built the motor said it should be around 10/10.5-1 Compression.
Depending on the port job, the fuel pump (are you still running the electric in-tank pump?) and the cam, you will probably just crack into the 13s. But it really depends on the port job. A ported intake will help too. My fuel pump couldn't come close to supplying me with the fual I need. A Carter external electric pump mounted out back cured that, and it isn't too loud. Got it from Summit for about $80. An out-of-the-box 750 quadrajet will hurt you for a couple of tenths. A worked over 800 would help for sure. And a ported intake would help as well. What convertor you got? Going from a 3.07 to a 3.42 was good for .4 in the quarter I seem to recall in my Riv. Your 2.73 to 3.42 will get you a lot better seat-of-the-pants kick than I got. Traction will be a problem for you. Are you using main studs? You DID have the engine balanced when it was built, right? Using new ARP head bolts? Be sure you have 34* total mechanical timing all in by 2500 RPM. Any less timing than that will hurt you. And use an adjustable vacuum advance to minimize total overall timing.
The motor was built by a guy my dad knows, Staley I believe. Im running the in-tank pump, and I'm going to run an In-line pump, not sure what kind it is, my buddy is going to give it to me. You think I should go with a 800 carb? I haven't put the 750 on yet, if a 800 would make a big difference I would rather use that instead. Im running a 2600-2800 TCI converter right now. I have a set of the new M/T drag radials, so I'm not to worried about traction right now. The motor was balanced when built and we didn't cut any corners to have it built. The guy builds a lot of race motors and it was built extremely well. We had the motor put back in the car, and when the guy put it in he said it was probably the most in balanced motor he has ever seen.
Can you find out what cam bearings he used? Is the engine installed in the car yet? If not, and he didn't use TA's dual back-grooved cam bearings you should really have him swap out the bearings. What valve springs you running? We've seen some Stage1 replacement springs with way too high open pressure, and that drives the cam down into the bearings causing early failure. Also, a high volume/high pressure pump does the same thing. If you installed one DO NOT run the car with it. Use a factory replacement set of gears and TA's booster plate and regulator. In 71 Buick switched to an 800 cfm Quadrajet for all 455 applications. if one is available I'd swap theat 750 for it. Others here can tell you what to look for in the difference between the 750 and the 800, visually, so you can be sure.
I think so. Make sure it is from a Buick. I think the Chevy quads have the fuel line entry on the side and not the front.
No idea what cam bearings were used, but I know he used quite a bit of TA parts. I think I have the build sheet lying around, but I would have to look for it. The engine was built about 2 years ago, and I have driven it for 2 summers now, I've driven the car hard, and so far there have been no problems I have seen.
