This is topic Higher Reving Engine? in forum Tech Talk at Northern California Ford Owners  .


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Posted by PopTheHood (Member # 7040) on :
 
I Have a 331 in my car right now. and people say that you should not rev it to high. I always keep it under 6,000 rpm's. I would like to make my car be able to rev higher without the risk of damaging it. What kind of parts do i need to do that? Lifters, Valve springs? what makes it be able to rev higher and be safe? Thanks
 
Posted by 1fast281 (Member # 4670) on :
 
How high do you want to rev it?

[ January 31, 2007, 10:00 PM: Message edited by: 1fast281 ]
 
Posted by PopTheHood (Member # 7040) on :
 
like 6500-7000
 
Posted by JohnB (Member # 969) on :
 
Does the cam's range go that high? If not, you're spinning it for no reason.
 
Posted by PopTheHood (Member # 7040) on :
 
I would like to rev to atleast 6500, cuz i have 3:73 gears and i have to shift into 5th hear in the 1/4 mile. if i reved it higher i wouldn't have to shift into 5th and would have a faster time. cuz my 5th has nothing. what cam and valve spring kit should i use to rev it up to 6500?
 
Posted by JohnB (Member # 969) on :
 
Actually, to make a good recommendation, I'd need to know the whole combo. Engine, trans, rear tire size, etc.
 
Posted by PopTheHood (Member # 7040) on :
 
331 pro bullet from Dss, twisted wedge heads, edelbrock air gap manifold, 1.6 rockers, I think 6.750 inch pushrods, 28oz flywheel and balancer, centerforce dual friction clutch, T5 tranny right now till it go's. 3:73 gears, G-force DR 26.04 in diamiter tire. 255/50/16.
Crank: DSS nodular iron crankshaft balanced to racing tolerances. Rods: DSS polished forged I-beams with ARP hardware and a bushed small end for full-floating wristpins.
Pistons: Forged DSS Pro Series, lightweight design.
Rings: Speed-Pro moly rings.
Bearings: Tri-metal main and rod bearings.
Main Support System: The DSS Main Support System including custom ARP main studs is key to high horsepower and longevity.
 
Posted by 1fast281 (Member # 4670) on :
 
So you are still using the stock valve springs? Get some aftermarket ones and rev until 6500 all you want.
 
Posted by PopTheHood (Member # 7040) on :
 
Im still using the ones that came on the TW heads. they are dual springs. What cam and spring kit would make this engin run hardest up till 6500?
 
Posted by 86- 50 (Member # 4723) on :
 
What cam?
 
Posted by JohnB (Member # 969) on :
 
TFS heads...I hope he's not using stock valve springs! [Wink]

If you have the room, step up to a 55 series tire. You'll gain a full inch in diameter, which will help on the top end.

Are you shifting where you are shifting because of concern for the rotating assembly, or because the engine is falling on it's face (flat-line)?
 
Posted by PopTheHood (Member # 7040) on :
 
I shift at like 5800 because most people say its gonna fuck it up if you go to high all the time. it pulls all the way to 6000, but i never go higher cuz i dont wanna mess it up.
 
Posted by PopTheHood (Member # 7040) on :
 
Right now TFS stage 1 cam
 
Posted by PopTheHood (Member # 7040) on :
 
I also have a 150 shot but i have never used it on this engine yet. would like to though
 
Posted by uncle bill (Member # 3953) on :
 
what have your trap speeds been
 
Posted by 66 AC COBRA (Member # 904) on :
 
not saying your engine can handle the rpm as is but the nitous will extend the power band a few hundred rpm

after doing the calculator for mph, based on what you have told us the car will be at 124mph at 6000rpm, now i dont thin that you are anywhere close to 124 on the motor unless you have a stripped out car

so with that being said, maybe the clutch is toast
 
Posted by PopTheHood (Member # 7040) on :
 
I think my best was 114.8 or somthing like that. I have a shiftlight that has a pill for 5300 rpm. when the light goes off i wait to shift for a little bit. maybe in fourth gear i dont wait long enough, and im not going as high of rpm as i think i am. maybe 5500. next time i go ill watch my rpm's

[ February 02, 2007, 05:33 AM: Message edited by: PopTheHood ]
 
Posted by uncle bill (Member # 3953) on :
 
quote:
Originally posted by 66 AC COBRA:
not saying your engine can handle the rpm as is but the nitous will extend the power band a few hundred rpm

after doing the calculator for mph, based on what you have told us the car will be at 124mph at 6000rpm, now i dont thin that you are anywhere close to 124 on the motor unless you have a stripped out car

so with that being said, maybe the clutch is toast
my thoughts exactly,134mph @ 6500, and 144 @ 7000
 




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