I wasn't impressed by the performance of the thumpr cams in the SBC's... You really need to have a cam spec'ed to your type of driving, but that cam does sound nice with 24 degrees of overlap...
It made 95hp extra on a carbed 5.3L in a Car Craft article a few months ago.
__________________
Quote:
Originally Posted by John Lingenfelter
The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power.
It was the 227/241 version, Mutha Thumpr. Ill try to find the mag, or the article online.
Edit: I found it, it is for sure the 227/241 Thumpr..
Quote:
Originally Posted by Car Craft
Our first shot was a simple baseline of the stock 5.3 with the carb and headers, making a credible 337 hp and 351 lb-ft of torque.... Just bolting in this new Thumpr cam (it didn't even have a part number) pushed the peak horsepower from 5,600 to a nose-bleeding 6,800 rpm..... the peak power jumped from 337 to 433 with stock heads. That's a 96hp bump with a cam swap!
The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power.
Last edited by SweetS10V8; 05-02-2009 at 06:26 PM..
109...fuk that...thats a track cam, not a street cam.
Actually its far from a track cam, the whole comp thumper series cams are all show and no go. They designed these cams for the guy who only wants the sound of a choppy idle cam but still has good driveability. From a performance stand point theyre not that good.
__________________ 1999 Firehawk-A4, D1SC 7LBS, 5XXrwhp, 4XXRWTQ, twin 4.5in ic's,lvl5 FLT 4l60e, Yank 3600, comp cam, comp 918 springs, tfs pushrods, snow meth kit, ls6 intake, 60lb injectors, racetronix fuel pump with wiring harness, Tuned by Rick at Synergy Motorsports.
2001 T/A WS6-Patriot stg2heads;TFS III cam;fast 90/90;slp lts;slp maf;slp lid;slp lm1;ory;42lbs injectors;pro 5.0;asp pulley;445rwhp & 422ft lbs. Tuned by Rick at Synergy.
Actually its far from a track cam, the whole comp thumper series cams are all show and no go. They designed these cams for the guy who only wants the sound of a choppy idle cam but still has good driveability. From a performance stand point theyre not that good.
I dont know what you concider "bite", but 96hp is extreme bite....
Are you even speaking from any experience, or just what you have read on the internet?
__________________
Quote:
Originally Posted by John Lingenfelter
The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power.
I dont know what you concider "bite", but 96hp is extreme bite....
Are you even speaking from any experience, or just what you have read on the internet?
Well there is alot more out there that can offer you more. Ive talked to comp cams reps direct and theyve all said the same thing theyre designed to give you the lope of a big cam and thats it. From a performance stand point theyre not that great.
__________________ 1999 Firehawk-A4, D1SC 7LBS, 5XXrwhp, 4XXRWTQ, twin 4.5in ic's,lvl5 FLT 4l60e, Yank 3600, comp cam, comp 918 springs, tfs pushrods, snow meth kit, ls6 intake, 60lb injectors, racetronix fuel pump with wiring harness, Tuned by Rick at Synergy Motorsports.
2001 T/A WS6-Patriot stg2heads;TFS III cam;fast 90/90;slp lts;slp maf;slp lid;slp lm1;ory;42lbs injectors;pro 5.0;asp pulley;445rwhp & 422ft lbs. Tuned by Rick at Synergy.
Mutha Thumpr cam? 
