BTW - A Thumpr is created by reducing the Lobe Separation Angle (LSA) to just 107 degrees. Last edited by techinspector1 01-19-2009 at 02:44 AM. Find many great new & used options and get the best deals for Comp Cams CL12-601-4 Mutha Thumpr Camshaft Lifters Kit - Chevrolet SBC 350 400 at the best. 1981 chevy short bed 355 motor with 58 cc heads thumper cam holley 750 carb roller rockers 350 transmission 3200 b&m stall 342 gears gos down the road good h. I had a 350 with a 268 cam and that already sounded very nice a 280 should sound great.
The dyno just really likes this head, so get over it)Ģ* Airflow Research 180, 474/6000, 470/4500Ĥ Dart Iron Eagle 180, 450/6000, 461/4500ĩ GM 元1 Vortec 1.94/1.50, 426/5500, 446/4000ġ1 GM 462 casting 1.94/1.50, 389/5000, 437/4000 Find CHEVROLET 5.7L/350 Chevy small block Gen I COMP Cams Thumpr Hydraulic Roller Cam and Lifter Kits and get Free Shipping on Orders Over 99 at Summit Racing COMP Cams is bringing the musclecar sound back, and it's nastier than ever Few things serve to grab our attention at a car show or cruise night more than a car with a thumping, high performance idle. Heads are listed best to worst on this particular motor. The opening half of the Winfield profile is shown (below left) together with the 8CM cam and the TilTech V8 220 cam we designed for our 40 Pickup project. The first number is hp, the second is torque. We found detailed cam profile data for a NOS Winfield Semi (or 1/2 Race) cam, and used that to construct an accurate representation of the entire lift curve. and i have a 700r4 be hind it.stock torc converter. will i need to changes springs if so what else needs to be dune. The motor is a 355 Chevy, 10.3:1 static compression ratio, 1 5/8" long-tube, equal-length headers, RPM intake, 750 carb. Hi guys i have a 1995 350 chevy with vortec heads stock roller motor i want to add thumper or muther thumper cam.
I thought it might help some of you to run a DynoSim with the thumpr cam and a few different sets of heads. These will tell you everything you need to know to run either of these cams.