Rb25det Max Capable Boost?

[84ace]

hey all just want to know what the max boost a rb25det can handle regarding just the motor its self...

atm it is running about 1.5bar with a t70 turbo and all is well, just want to know if that is safe

is the motor capable of more boost or is this about it???

no pinging and no leaning out, so far

Cheers Acea

[fEkuaR]

Its not about how much boost can it handle its about how much power it can handle on stock internals. What power are you making at the moment? Then we can give you a basic guide to what is generally considered safe on stock internals. Around 250-260rwkw for longetivity of engine.

[84ace]

cheers for the fast reply

heres the full story... me and a mate have been building his 32 rb25det for ever and have logically progressed to the point where right now after getting a 3in put on 3 days ago the 38mm gate is to small to bypass enough gas. so with the wategate connected straight to the manifold it spikes at 1.5 and drops to about 1.35 in 3rd. where as before with such a restrictive exhaust the max boost it would run was about 14 psi with the wastegate connected to nothing or the boost controller set to max.... being in wodonga and both working full time its going to be about 2 weeks before we can install a tial 44mm gate or something bigger (unsure if 44mm gate is enough?)

it made 200rwkw with old exhaust and i think now at 1.5bar and a free flowing exhaust its probably pushing 250 ish (really unsure? +or- half a brick) but the stuck in the seat factor has increased considerably and it breaks traction in 3rd...

just need to know if 1.5bar is ok untill we can change the gate and get it back on the dyno for a tune

cheers acea

[fEkuaR]

I wouldnt be pushing it hard without getting it on the dyno for atleast a powerrun to check the AFR's are all ok. You could do some serious internal damage otherwise.

[84ace]

AFR's are sweet thanks to a wb02 kit we have the computer mapped for a z32 maf but are using the r32 one to put the comp into saturation so at full noise and 7k its running about 11.5:1 (as soon as we are happy with the boost controllability its straight on the dyno for a re map and some timing)

[fEkuaR]

Well if it isnt running lean and it isnt knocking then it will be fine untill its on the dyno. Just be sure its not knocking when the turbo is spiking.

[84ace]

Thanks fEkuaR

helped me out alot