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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 75 C20 on August 27, 2007, 09:17:13 pm

Title: comp- thumper
Post by: 75 C20 on August 27, 2007, 09:17:13 pm

anybody tried one of these yet???

http://www.compperformancegroupstores.com/store/merchant.mvc?Screen=PROD&Store_Code=CC&Product_Code=TMPRSBC&Category_Code=Thumpr (http://www.compperformancegroupstores.com/store/merchant.mvc?Screen=PROD&Store_Code=CC&Product_Code=TMPRSBC&Category_Code=Thumpr)

Title: Re: comp- thumper
Post by: FlatBlack77 on August 27, 2007, 10:22:16 pm

I had my sights set on one for a while...then I found out they are over $300.

Title: Re: comp- thumper
Post by: Captkaos on August 28, 2007, 11:05:38 am

it also doesn't included the roller lifters...  And requires a larger stall and gears.

Title: Re: comp- thumper
Post by: 75 C20 on August 28, 2007, 03:07:17 pm

wellp- there goes that idea

Title: Re: comp- thumper
Post by: team39763 on August 28, 2007, 06:09:03 pm

I've read that they weren't "all that".  A guy had said that you'd be better off getting a real performance cam rather than this "marketing gimmick". I agree, my custom grind cam for my 6.0 cost the same as that thumper.  But isn't that thumper a retrofit cam - meaning you'd need $300 lifters and other required parts?

Title: Re: comp- thumper
Post by: Captkaos on August 29, 2007, 10:18:59 am

the cam is for the older non-roller equipped blocks, but that isn't anything new.  It does required the roller lifters ($500) a full roller timing chain, cam button and a different ditributor gear.