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Is This Roller Set Up For Real?????


Guest V8Z

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I'm wanting to go with a full roller system on my pre 1987 350 block but the retro kit from procomp cams is rediculously over priced. Check out this link from ebay and tell me what you think, great idea or major rip off.....

http://cgi.ebay.com/ebaymotors/Chevy-SBC-Retrofit-Hydraulic-Roller-Lifters-cam-retro_W0QQitemZ200028126735QQihZ010QQcategoryZ33614QQrdZ1QQcmdZViewItem

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its an old idea that works (KIND-OF-BARELY-SOMETIMES)its really BULL $HIT, the lifter bores in the older blocks and oil passage locations won,t work correctly and if the cam lift exceeds about .500 youll generally have problems

CAN it be done yes, will it work,that depends on the application and rpm range, but generally its a BAD idea or thats what GENERAL.MOTORS. would have done, they changed the lifter bores length for a REASON and the after market systems are designed that way FOR A REASON, you can,t CHEAT and expect it to work correctly

 

if you want to save money...

 

http://www.dougherbert.com/

 

http://www.dougherbert.com/hydraulicrollerliftercam-p-9882.html

 

http://www.dougherbert.com/highenergyhydraulicrollerlifters-p-10126.html

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So your saying that the retro kits that ProComp and Crane are offering are ok to use? I didn't know that the lifter bore was different. That's really ashame to, if this could work it would save a ton of money, but like you said you can't cheat and appect it to work.

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The retrofit kits that use a linked lifter will work fine.

The kits sold on Ebay are just instructions on how to grind your block and what wrecking yard parts to get to make it work.

I have to agree with grumpy that it isn't a good idea.

However the lifter bores are in the same location and diameter and the oil galleries on the blocks are in the same location, so that wouldn't be the issue, all the grinding on a perfectly good block to make the lifter retainers clear would be, as if you go too deep your into the water jacket, and even if you don't you may be close, making the block prone to crack.

 

The retrofit lifters look like any aftermarket roller lifter, a pair of lifters is linked together by horizontal or vertical bar. This keeps the roller on the lifter running sqaure to the cam lobe, whereas the factory design uses the lifter retainers.

The factory setup runs into problems with high lift because the lifter will drop out of the bottom of the retainer on high lift cams, and then not be controlled, begin hitting the retainer, etc. Not a good setup for a performance oriented motor.

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