hot85fifty

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

turbosha

light weight internals and fly wheel. a good balance job. high quality fasteners. stiff valve spings,thick walled push rods. youll be pushing 7500 rpms in no time

JD1969

The cam will have a big influence on what rpm an engine makes peak power, you will need spring to match it. My main question though is why do you want a really high revving engine? Drivabilty will suffer and you will generally sacrifice low end torque. Plus it is always harder on a motor to spin it higher. 6000 rpm is pretty high for a street engine.

turbosha

let him ring it out with his ricer buddies, they go 9000rpm and hes just jelous

hot85fifty

what do i need to do toto my car to rev higher? here is what i got.
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. Heads: TFS Twisted wedge heads with Valve Springs, 1.470" o.d. single spring with damper, 110 lbs. @ 1.800" installed height, 305 lbs. @ 1.260" open, 360 lbs. per inch rate. Flywheel: Ford racing 28oz flywheel.

hot85fifty

I would be willing to change the cam to whattever and get new valve springs.

turbosha

have you tried higher rpm's? get an afermarket knock sensor and try to float the valves.[>:]

hot85fifty

what is a knock sensor? And how would i know if the valves are floating? Im carburated if that makes a difference?

turbosha

http://www.jegs.com/webapp/wcs/store...0002_748342_-1
when the valves float youll know it . like a built in rev limiter ,but worse.

ih8chevy

jd was right, u dont need to hit that high, our motors were originally truck motors and they are prided on the low end. this is not an ls1 if i were u i would tach it at 6500 get a big cam trick flow stage 2 maybe and the heads and a nice carb or holley intake and you will be making some great pwoer from 2500-6000 instead of 4000-7500, ur gonna need some steap gears for that job. plus the balancing alone will be hard, ur valve springs are gonna have to be triple reinforced and there arent many cams that rev that high, ur gonna be essentially runnin a race cam, somethin well over .580 lift just to see a power band that high, and then ur gonna have ptv issues. just dont rev it that high. u want a high revvin motor, buy a honda