Boost level cross post.

[Uncle]

So gents and you too tippy, I searched but had no real luck with the search words being so common.
I’ve bolted my engine back together for it’s fist event last weekend after doing the EFI swap. We ran the car on what I would call a Paris Hilton tune. Rich and retarded. With the boost limited to 1 bar it made 387rwhp@5,500RPM with it strapped down very tightly..
Anyway the engine is a stock bottom end late 3.3 with ported heads,964 cams,ARP head studs,3.2 manifold, Haltech ECU,LS coils,BW366, TIAL gate and a very effective WTA intercooler set up. In 3hrs on the dyno intake temps between 32c and 38c. It was tuned on our 98 octane so about 93 octane over there. I have a flax fuel sensor so do plan to run e85.
So what’s considered “Safe”? I can keep the AFR’s in the right place, feed it all the fuel and the engine has knock control. The turbo will take all the PSI's I can throw at it so that won't be an issue.

My thoughts are 1.2bar on PULP and 1.4 on e85 keeping RPM limited to ~6,000.

Thoughts?

[Steve@Rennsport]

Originally Posted by Uncle

My thoughts are 1.2bar on PULP and 1.4 on e85 keeping RPM limited to ~6,000.

Thoughts?

While I cannot comment about your power numbers since every chassis dyno (rolling road) is different, I can tell you that 935 engines, designed & made to run at high boost levels, use many different components to withstand such boost pressures.

Running at 1.4 bar, we rebuilt them every 24 hours of operation for reliability. Pistons and exhaust valves (oftentimes cylinders, too) were discarded for new ones along with rod bearings.

Not cheap to make good power.