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>The bottom line is that unless you're planning on using non stock >valves, cam or high RPMs then the stock springs will be just fine. the heads are the CB performance 044 with 40 by 35.5 valves. i know these aren't ideal for stock carbs and exhaust, but i've been told it will work. cam is a 274 degree advance duration "cheater cam" from CB also. don't plan on running more than 4,500 rpms, it's just for "spirited" daily driving. so what do you think? >The last years of type 3s went down to 7.2. I try to keep it under >that just because I think we can depend on even premium octane >to slowly come down in the future. Can you remember when >Regular was 92 Octane? so, what i'm beginning to understand is that i should run closer to 7.0, and any amount over that i go, i reduce engine life. is it kinda like exchanging power for engine life? lets say i always use chevron supreme, at what ratio do i start to reduce life most: 7.3, 7.5, 7.7? or is it just a linear relationship? i'm "only" 24, so i can't remember back *that* far, but i have seen the numbers go down in my short time here on this earth. =) thanks, Dan Hoopes '67 Square, "Stanley" Provo, UT _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com ------------------------------------------------------------------- Unsubscribe? mailto:type3-request@vwtype3.org, Subject: unsubscribe