"thumper cam" - Page 4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

wwotr · 02-25-2011, 07:04 PM

Well it was news to ME.
I've never heard of this type of Camshaft.
Supposedly theres a Stage 1, 2 & 3 Cam.
Supposed to retard the timing during idle (up to 1K RPM) to give you a radicle, Rumpity Bumpity Idle, then after 1K RPM's, it goes back to the stock timing.
I had never heard of this type of Cam before. Sounds like no more,
do you have to "Pump Up" your engine to accept a loping Cam.

I heard they were expensive though.
I was told $500.00-$600.00???

Anyone else heard of/or had experience with one?
I'd love to Hear/See a You Tube Video of one in action!

02-25-2011, 07:04 PM	#1
wwotr Registered User Join Date: Jan 2005 Location: Clearlake Oaks CA Posts: 1,716	"thumper cam" Well it was news to ME. I've never heard of this type of Camshaft. Supposedly theres a Stage 1, 2 & 3 Cam. Supposed to retard the timing during idle (up to 1K RPM) to give you a radicle, Rumpity Bumpity Idle, then after 1K RPM's, it goes back to the stock timing. I had never heard of this type of Cam before. Sounds like no more, do you have to "Pump Up" your engine to accept a loping Cam. I heard they were expensive though. I was told $500.00-$600.00??? Anyone else heard of/or had experience with one? I'd love to Hear/See a You Tube Video of one in action! __________________ Hello members... I'd like you to know that I sold, my 72 GMC (Ratikle), back in November of 2011. I don't visit the site much anymore, but please feel free, to drop me a private message. RIP...."RATIKLE"



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