1957 CHEVY BELAIR with THUMPR CAM and FLOWMASTERS SUPER 40s
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Uploaded by QBANBELAIR on Aug 30, 2008
Just installed headers back 2 1/2 inch custom system with Flowmasters super 40's, engine is a new crate GM performance parts 350 with a Comp Cams Thumpr cam and edelbrock performer intake with edelbrock 600 carb.... LOVE THE SOUND!!!
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@vdawn36 Figure out your compression, sounds to me like it is a bit low for a performance cam. You need about 10:1 to make it work good. I used .125 dome pistons on my open chamber heads to get 9.8:1. Check out my video of the 55 with a comparable lunati grind.
alhess78 5 days ago
i just installed same cam in my car, and it wont idle right, it burns real rich..its a 350 motor,76 cc heads, 60 over flat top pistons..did u have to do anything to get car tuned to cam? email me at dual455@aol.com 803/389-2537..steve
vdawn36 6 days ago
What's the lift on the cam?
85ChevyMonteCarloSS 2 weeks ago
Sounds amazing man. You should be very proud.
perfectflaw7186 2 weeks ago
@kenzo5716
Not yet, Im thinking after the new year, but soon enough.
MrAss707 1 month ago
@MrAss707 Get that new modulator in yet? Let me know what happens.
kenzo5716 1 month ago
@MrAss707 make sure your HEI hose is connected to a port that has no or very little vac at idle.
kenzo5716 1 month ago
@MrAss707 OK, it will be very interesting to see how a new modulator could effect the factory vac- gauge. LOL
kenzo5716 1 month ago
@kenzo5716
I have an HEI distributor w/ vac-advance and Im pretty sure the line is hooked up. I think if I replace the old vacume modulator with a new part, as the former owner suggested the day we made the deal. I just picked up a new timing light, id like to check my timing too, and I want to get a summitracing, high torgue mini-starter. Santa Rosa Hydromatic has vac-modules for TH400s @ $25 and I may pick up some fresh line.
MrAss707 1 month ago
@MrAss707 The other is "Timed Vacuum" which delivers vacuum only after the throttle is opened. It's also called the . Distributor port is usually located on the passenger side of the primary metering block, just above the idle mixture screw on Holleys. If your distributor is equipped with a vacuum advance, I strongly recommend that you use it. Tranny uses port that has full vac at idle.
kenzo5716 1 month ago