How hard could I theoretically turn this setup regularly without mechanical failure? Here is my current project, not much but on a college budget.
+.030" 95 LT1 block
-.010" 95 LT1 Stock Crank
4340 Eagle H-Beams
JE/SRP Flat Top (11.1:1 final)
All Balanced +/- .5g
ARP Main Studs
Clevite 077's

Ballpark figure without mechanically pushing the limits? Basically what I am trying to build is a high revving 355 with longevity as well as the ability to handle 200+ hp of nitrous in the future, on a budget. Any ideas?

 

Depends on your hp I think. The more hp, the higher the forces that are generated. Ballpark I'd say 7000 or so without blinking. Assuming all the tolerances are tight and everything was put together the correct way.

 

Unless you are planning something exotic like a single plane conversion, the available heads and intake will limit the rpm before there is a mechanical issue. The stock PCM also won't run the motor over 7,000 anyway.

Rich

 

With the stock crank 6500/7000 should be the limit. With a 200 shot it will be risky. The stock crank will take about 500FWHP N/A and the shock of the hose will be a lot.

Get a forged crank and 4 bolt the block.Ya will need "H" series Clevite's or better and a GOOD oil pump and pan.

 

Also, the nitrous will cause more problems than the rpm.

Rich

 

Reccomendations on forged crank? The heads will be a heavily ported set of stock lt1's as well as the intake. Derek

 

With the comp re-burned and an MSD Opti I will still be limited at 7k? Derek

 

I'm about to be running a similar set-up (see sig) Bret Bauer told me that with the cam I have I'll need to spin 6800-7000 rpm. I'm running a melling M55A oil pump and was planning to run the stock oil pan, but I'm having second thoughts about that and might go ahead and buy a Canton pan. Would this be a wise choice, or will it be OK to run the stocker?

Sorry the thread hi-jack, but my set-up is so similar I had to throw my question in too

 

PCM has a 7,000rpm "hard limit" which cannot be bypassed. But typical LT1 heads and intake won't support more than this anyway, especially a stroker, and with N2O, who needs >7K anyway?

As far as HV oil pumps and stock pan - NONONONONONONO. Do a search on this topic if you want to learn more.

Cranks: Callies Drgaonslayer or Lunati Sledgehammer are my choices. Stocker is fine for 7,000rpm but not with N2O added.

Rich

 

My pump is the M55A, not the M55HV. To my understanding, the M55A is standard volume with a highpressure spring installed in it, while the M55HV is the high volume, standard pressure. I researched the subject before I bought it and knew to stay away from the HV units with my stock pan.

Now if I was to go with a pan with more volume such as the Canton, should I switch to a HV pump as well, or stick with what I have already? Or does it really make a difference at that point?

 

If you have an aftermarket pan, get the HV pump. That's the only thing stopping me from running one, I don't want to suck the pan dry.