Here are some tidbits from e-mails that were forwarded to me by GregAust.
Glen Hayes wrote "I run a C-4 behind a 557 BBF that makes 993hp on alcohol and have well over 400 runs on my C-4 and have never had a problem. Here is the secret:I run Alto race clutches and Kolene steels an H model servo(it is the largest factory unit) and highly desirable but plentiful. Make sure you use a stout spring inside the servo (I use a std 351 cleveland valve spring). Make sure you set the clutch clearances to factory clearances and use kevlar bands. Also, use the best parts available and get them from performance automatic in Gaithersburg Maryland.Their web address is
http://www.performanceautomatic.com"
He also wrote in response to some 428Mario questions, "I get the teflon seals for forward and direct from H&R Transmissions in Indy. My transmission runs about 215-217 psi on line pressure. (Mario's C4 runs 200) One of the things I do is go in and put a small radius around the openings for feed from the oil pump as they are razor sharp from machining and this seems to help. I just use the H-model servo because it gives very solid 1-2 and 2-3 shifts. The other thing is that I run the C-5 case. C-5s are easy to identify because of the 1/4" NPT fittings for lines instead of the 1/8NPT fittings. Those cases have larger circuits through them and hence more volume. My transmission is really pretty mild...not a lot of exotic stuff in it."
A leading race transmission guy in Sydney says that aftermarket servos are a "wank" and do more harm than good and that he would never use one. On the subject of clutches he puts in whatever the customer's preference is
because it makes little difference. He says 6 is no better, if not worse, than 5. He only uses 5, even in his 8 second
transmissions.
Opinions are like bellybuttons. Everybody has one, and they are all different.
<font size=-1>[ This Message was edited by: R Code on 3/1/02 10:46am ]</font>