how much boost could a stock l98 crank/rods take if its kept to 5500 rpm max?

 

Willie is running over 15 #, but has forged pistons.

I have all stock bottom end and am currently running 10#. Just ordered a 15 # pulley!

With the higher boost I am looking into a new SMC alky/water kit that Steve is developing for boosted applications. It will increase pump speed with boost to help eliminate bogging with boost at lower RPM, but still allowing spray throughout the boost cycle.

It is about a month out from being on the market.

 

I'm was running 10psi when I lost a piston ring, I haven't gotten it apart yet but I belive the crank and rods are ok. Planing on building a 4340 forged steel short block to fix that problem.

 

I've been running 6 psi for 41k miles on the stock L98 (116k miles total) and no problems yet aside from the occasional smoke on startup (rich). I run only Chevron w/ Techron 92 octane gas and 15w50 synthetic oil (Mobile 1 Red Cap).

 

I'm running 10# on a stock 305. Using water injection and no intercooler. The real key to the engine's survival is to make sure your getting absolutely no detonation and don't over do it with your driving habits. No need to rev a stocker past 5500. Hell it feels like I'm hitting a brick wall at about 5000 with everything bone stock and running good. I think I'm finding the flow limits of a completely stock engine

 

I'm getting 8psi on a stock bottom end for my L98. Air to air intercooled.

 

I am running 10 psi on stock crank ground 10/10, stock rods w/ arp wave loc bolts, forged pistons and main studs. I plan on using 15-18 psi. I have about 150 miles on it. runs good, but the tranny is shot.