| Re: 1989 L98 camhead upgrade questions |
Subject: Re: 1989 L98 camhead upgrade questions by 89Vette on 2008/6/9 1:11:51 Quote:
The EGR recirculations exhaust fumes back into the intake to cool the burn during extra hot conditions. And, it reduces Oxides of Nitrous emissions. I will be altering running temp to get it down about 15 degrees. (Water pump, thermostat, and fan settings). $500 is for both heads and I was shown the work done. His bowl blending and runner polishing look very good. I can "see" how much is removed from inside the runners. I've talked to Ron... helluva nice guy. He doesn't believe this pricing either! Unless I go miniram, mathematically, I'm not convinced the AFR's would impress me with a large-tube TPI (and yes, base). I've talked to Mike at CorvettePlenum.com. I like him too. He even WANTs to do the intake for me. And, I do like the looks of what he does. From other posts I've read, it seems probable that he could get SLPs equal to ASMs (since they are smaller). But, I'm not sure he could get them better -- unless I also sent them to ExtrudeHone. I have a used set (base, ASM runners, ported plenum) lined up if I want it from a CF member. The base has been off a couple of times and he milled his 113s .030. I wonder if that "mushroomed" any of the china rail though. In other words, if it would still seal well on a not milled motor. AFRs are about $1430ish. I'm not sure about milling. But I would figure about $1600 w 58cc chambers. (My local shop will surface mill for $60. I'm not sure how much it goes up to knock em down from 64cc -- if I used them. I've got the FIRST in the back of my head -- not out of the running yet. The compcams I listed above are supposed to be better grinds for long-runner intakes. The 2nd CraneCam looks pretty good, but I'm not sure it's better than the other selections. I don't want something where I'd have to change gears. |
