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Old 01-24-2010, 09:06 AM
TRBenj TRBenj is offline
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Originally Posted by Rickracer
Big blocks are rather hard on the valve train, especially with the more radical profiles, and the fact that most of today's oil don't have the necessary extreme pressure lubricants for flat tappets, plus the fact that rollers can make SO much more power than flat tappets with similar specs. With that in mind, I'd strongly consider going roller. When I was building/rebuilding a 427 for my Vega, I talked to every major cam manufacturer, and they were ALL trying to talk me into a smaller roller than the flat tappet I was already running. I finally called Herbert Cams and talked to somebody who was speaking my language ( I think it was Doug Herbert, but I'm not sure, he mentioned his Dad, Chet, in our conversation). Their first suggestion was EXACTLY what I had in my own mind that I was looking for, and the price was GREAT. I installed it with a set of used rollers I picked up at the track pretty cheap, and after a few thousand miles, one of the lifters wiped out. Herbert had me send the cam back to them for repair, cost was like $50 or $75, I don't remember now for sure, but when I got it back, it looked like BRAND NEW, I don't know for sure if they fixed it or just sent me another one, but either way, I was so pleased with them that I ordered a new set of rollers, along with matching springs, retainers and locks. Best money I ever spent on that motor, and I highly recommend emailing or better yet, giving them a call, and just see how affordable it would be to go roller.
I totally understand the advantages to the rollers and would love to go that way. I may give Herbert a call regardless to see what they can recommend. I should have mentioned though that, to my knowledge, reverse rotation roller cam blanks dont exist for a BBC. A buddy of mine looked into the costs associated with going roller on his RH 454 and it would have been north of $2k. Thats not an option Im considering at this time, as $2k could buy a lot of flat tappets! Im well aware of the issues with modern oils, but Ive had good luck with Valvoline VR1 on my flat tappet Fords to date. If thats one reason I cant go super aggressive, so be it- but a sub 6000 rpm cam shouldnt be TOO crazy, should it?
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