nik1703

Hey guys,

So - reading the cc503 specs, it claims that it makes max power @ 6200-6400 rpm.

Granted I install the cc503 with all proper valve train components, is spinning that high safe? I feel like my motor wouldn't last very long spinning 6400 on stock heads.

ss.slp.ls1

iTrader: (36)

I spin to 6300-6500 every day. We'll see how long it lasts.

I have read somewhere that 6500 rpm is when the rod bolt will likely fail.

StealthFormula

iTrader: (35)

The cc503 will not make peak power in the 6200-6400rpm range but that is where you want to shift it. For example when I had LT's, ORY, Catback, 1.6RR's and the cc503 my peak power on the dyno was at 5900rpm. Every setup is different so it will vary slightly but you want to shift a couple hundred rpm's beyond peak to get the most potential out of the car. Typically 6200-6400rpm shifts are about golden for a car with the cc503. Not to jinx myself but I've been shifting in the 6400rpm range for a decent while now without any issues, I refuse to go higher tho.

black96lt1

iTrader: (2)

has anyone ever hit 400 rwhp with a 503?

ss.slp.ls1

iTrader: (36)

I think even with ported heads and all the bolt-on's it would be difficult to hit 400 rwhp with the CC503. With a CC306 or GM847, it would be a different story.

Green3spd

iTrader: (7)

I shift around 6200-6300 with a 23x/23x cam.. stock heads/intake..

ss.slp.ls1

iTrader: (36)

LOL at your sig, that .01 seconds must be eating away at you. I say add a 10-15 shot just to get you into the 7's.

nik1703

okay, i just dont want to upgrade my valve train, my cam and tune only to blow my motor from spinning 6200 lol

buzz12586

iTrader: (17)

I am spinning it to 6200rpm in my car.

nik1703

okay guys, ill take your word for it. but if my motor blows i'm coming back to get ALL OF YOU!

lol jk

andrew69_04

iTrader: (148)

my brother ran this cam in his lt1. idk what he spun it to but it seemed to run well.

Green3spd

iTrader: (7)

Hell, just changing your valve springs is good for some lost HP! Those Valve springs get wore out!

You have No Idea! Im goin to break into the 7s after my clutch is installed!(Today btw) I hope..

PNYKLR-TA

iTrader: (1)

yea i've also heard 6500 is the limit for an LT1 and to not go over that.

but then again im sure some people have done it, but for how long is the real question.

listen to stealth, he said his peak power was 5900, so shift say 400rpms above that if you do it, 6300rpms really shouldnt hurt the stocker.

BIG_T

iTrader: (1)

6200 is fine for everyday abuse hehe

RamAir95TA

iTrader: (2)

You cannot put a magical limit on when the stock shortblock will fail. Some have had success with higher, closer to 7k (and past). Others have it fail at 6200. It is completely reliant on several variances other than RPM itself.