Black01M6SS

iTrader: (3)

I understand that on a stock LS1 the rod bolts limit you, unless you are very brave, to under 7000 rpm. So what limits how high you can rev a fully built engine?

My 402 has a Callies Dragonslayer crank, Callies Compstar rods, Diamond -18cc pistons, ARP main studs, ARP rod bolts, ARP head studs, AFR 225 62cc heads, LS2 timming chain, hardened pushrods, stock rockers. I'm not sure what valve springs are in the heads but they are AFR dual springs that are supposed to be able to handle the cam I have. If I remember right the cam specs are 237/248 .650/.657 114 LSA

I should be done with everything withen the next couple weeks and it will be off to the dyno. I had planned on starting out at 6500 and bumping it up from there depending on how the hp curve looked. The goal is to hit 850rwhp with pump gas and meth injection with the F1A. I was just wondering where I should call it quits if the HP curve is still holding strong. Does piston/rod speed limit this setup with the 4" stroke?

NassyVette

iTrader: (22)

Any reason you're sticking with stock rockers on the AFR heads?

Black01M6SS

iTrader: (3)

Because everyone I've asked said the stock rockers were fine. I really don't have the money for new rockers so hopefully the stockers will hold up for awhile.

Haans249

iTrader: (24)

Yea, the stock rockers will work just fine. I do have to say though, that I highly recommend getting them modded by Harland Sharp, I always fear the needle bearings falling out, so I had my LS7 rockers modded, and they're working out great. FWIW, I'm running a 4" stroke in my 427, and spin it to 7,000 rpms. I don't think you'll have a problem hitting that number with your setup. Just watch out for any signs of valve float.

Black01M6SS

iTrader: (3)

Cool, I'm not against getting new rockers or having mine modded but if I had the money there are plenty of other things that I would like to have "like an SDCE tensioner setup". For now the main goal is to just get the car running and take it to the track before I loose interest in it.

BriancWS6

iTrader: (18)

If it's making power and you've got the valve control handled, I wouldn't be afraid to turn it 7500. But if it peaks at 6600, no sense in revving it that high for nothing.

ONEBADWS6

iTrader: (22)

I've had stock rockers to 8k in mine. With 180/400 spring pressure too.

fox16

iTrader: (-2)

my buddy has a very similar motor minus afr's just hogged out 243's and i seen him turn it to 7600 on more than one occasion

DrkPhx

iTrader: (15)

I rev mine to 7200 rpms without a problem. I use the AFR 8019 valve springs and lightweight intake valves with stock rockers.

LSGunZ28

iTrader: (8)

with a 4" stroke and a good valvetrain you guys feel comfortable revving to 7500 rpms and higher??

jermzz

iTrader: (18)

revit til it stops making power...

VGLNTE1

iTrader: (1)

any reason you are running -18cc pistons on a NA setup?

Black01M6SS

iTrader: (3)

Maybe you should read the first post again? Or read my sig lol

Black01M6SS

iTrader: (3)

Actually I made a mistake. I just went over the information again. They are actually -28cc pistons. Not that it matters but I figured someone would eventually catch the mistake.

BES Stroked Nova

iTrader: (24)

Hell I have taken mine to 7500 with stock short block with rod bolts...

Its NOT only the bottom end holding together... but about the valvetrain being able to handle those RPM's too.

Black01M6SS

iTrader: (3)

The piston speed on a stroker motor would be way higher than the piston speed on a stock stroke engine so that needs to be factored in also.

You are right about the valvetrain. After speaking with a couple of the sponsors it seems that the lift on this cam is way to high and would most likely cause valve float issues when combined with boost. I'll be swapping the cam out for one with lower lift

AU N EGL

I agree