42's and a 2.8.....
I'll say tapers off from now on though
09-13-2010, 07:04 PM
#28
The stock valve *springs are good to slightly past 7250 rpm. My rev limiter has been set at 7250 rpm for over a year, and i shift when my light on my interceptor comes on (7075 rpm). By the time I shift i am almost at the limiter. I have only bumped it once or twice.
Last edited by Staged07SS; 09-14-2010 at 07:15 AM.
09-14-2010, 07:14 AM
#33
Yes, thats what i meant. Thank you for clarifying 
GM recommends 78lb valve springs for anything past 7250 rpm. They actually say past 7000 rpm, but i have spoke to Bill (more tq more hp) about this, and he claims they will be fine slightly past 7250 rpm. Lots of people have been shifting at 7400 rpm for years w/o issue. Like Roel said "shift at your own risk".
If you want to rev to/past 7500 rpm it's recommended upgrading to neutral balance shafts.
GM recommends 78lb valve springs for anything past 7250 rpm. They actually say past 7000 rpm, but i have spoke to Bill (more tq more hp) about this, and he claims they will be fine slightly past 7250 rpm. Lots of people have been shifting at 7400 rpm for years w/o issue. Like Roel said "shift at your own risk".
If you want to rev to/past 7500 rpm it's recommended upgrading to neutral balance shafts.
Last edited by Staged07SS; 09-14-2010 at 07:32 AM.
09-14-2010, 08:31 AM
#34
Senior Member
Thread Starter
iTrader: (7)
Join Date: 06-30-10
Location: Newport, NC
Posts: 523
Likes: 0
Received 0 Likes
on
0 Posts
I see how this has turned into more of a redline question. LOL. Its more about will I be ok with a tune for 42s and a 2.8 if I dont rev the hell out of it and exceed the duty cycles?
09-14-2010, 11:26 AM
#38
Senior Member
Thread Starter
iTrader: (7)
Join Date: 06-30-10
Location: Newport, NC
Posts: 523
Likes: 0
Received 0 Likes
on
0 Posts
Yes gentleman I did, and thank you. I should have been a bit more specific. I was looking for more of a concesus. Seeing as how you two have answered I will go with a YES! LOL. Thank you for your time!
09-14-2010, 11:29 AM
#39
09-14-2010, 11:33 AM
#41
Senior Member
Thread Starter
iTrader: (7)
Join Date: 06-30-10
Location: Newport, NC
Posts: 523
Likes: 0
Received 0 Likes
on
0 Posts
Thank you all! For some reason I have to resubmit this post. Hmm.
Yes sir.
No problems here sir. Thank you!
No problems here sir. Thank you!
Last edited by bonylad; 09-14-2010 at 11:33 AM. Reason: Automerged Doublepost
09-14-2010, 11:37 AM
#42
09-14-2010, 02:56 PM
#49
Senior Member
iTrader: (1)
Join Date: 07-02-05
Location: West Carrollton (Dayton), OH
Posts: 8,725
Likes: 0
Received 2 Likes
on
2 Posts
Correction, post by post. There is an infinite amount of misinformation on this damn forum. No one listens to me when I comment, and they follow the "herd over the cliff". I'm not right 100% of the time, not even 90%. But damnit! This board has a 99.9% fail rate on information
09-14-2010, 03:26 PM
#50
Member
Join Date: 08-31-09
Location: Big Bend, WI
Posts: 364
Likes: 0
Received 0 Likes
on
0 Posts
I think anyone that cares about there car on here listens. I'll give anyone the opportunity to say what they think is right. I hope there wasn't anybody who got hurt feelings from my questioning them. I just haven't seen a dyno of anyone on a stock top end (head, cams, springs) "building" power to 7000 on an M62. Don't get me wrong, I'm not bagging or trying to talk crap. If it's being done I just want to know how they are doing it. I'm too damn old to be trash talking on a forum anymore.