Join Date: Mar 2003
Location: Spokane WA
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Re: single groove valves?
your an example of long term 3.3 use with a 7 degree retainer and a 8 degree keeper / lock.
Conicals float, at some point, but no doubt way higher than we rev anyway lol. So they may never fail on your engine. By now you've been seeing the benifit of having them for years. I've had my springs tested and normal springs when pushed 6500 all degrade in seat and open pressure. They fail up to 40 lbs of seat pressure on the worst one, normall 15-25 lbs. Combine that with factory lifters squishing over time and it's no wonder they make noise lol.
Still the down side is no big cams, but the 88 turbo and TBI are the most popular cams anyway. Most never see a big lift cam. Making the 3.3s sound better. Of course 3.3s don't work if you read TM, but Simon never followed the directions and shimmed them..
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86 GLHS 76
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