hey guys,
just made 570 hp on 25psi
s366
e85
aem series two
and all supporting mods
want to know where i should stop boost wise
Also whats the best trans i could with besides the t56 that will hold up and not WHINE like crazy.

T56 seems like to much work with the whole auto rear iron thing.

 

Isnt it an Auto bell housing?

 

from what i heard you have to use the auto iron to?

 

I dyno my car same turbo and @ 28 psi on C16 it did 592hp/480 lbs tq, we try going to 30 psi but only gain 3 hp more, probably if I had a bigger hot side that would of helped. We did 3 runs and they were between 1 hp.

Now running E85, so have to retune.

What injector setup, pump and what base fuel pressure?

On the tranny, I don't think there isn't any other options than T56, at least for the money.

 

what ecu are you on?

you think its safe to be above 25psi?

 

I don't see why it wouldn't be safe.


I'm running Adaptronic ecu
1000/2000 cc
2 intank 340

I'm looking to add 2 more 2000 plus the 1000/2000 so I don't have to run a 70 psi base fuel pressure.

 

dont the rotarys stop holding up after 25psi?

 

assuming you have an "off-the-shelf" S366 with 0.91 a/r you can run 27-28psi boost max, until you are backpressure limited. To run more boost safely you will need to upgrade to the 1.00 or 1.10 a/r housing. (these housings are only available through the aftermarket, not off-the-shelf BW)

that agrees with my experience on the 0.91 a/r for the S300SX 9180 aka S366... If you were monitoring exhaust manifold backpressure (EMAP) pre-turbo then you might see a corresponding spike in emap. like you said a bigger hot side will change that choke point, but with a slightly later spool

not if the motor, turbo, tune and fuel are up to par

 

Arthur,

what is your fuel injector setup, how much rail pressure and what was your top duty cycle?

howard

 

ID2000 x4
Twin in tank walbro's
43.5 psi base pressure
88% IDC @ 25 psi (running 11.7 AFR)

 

^This man would know, he tuned Arthur's car this past weekend.

Congrats to both, some pretty serious horsepower #s

 

With my current 1000/2000 setup I had to raise fuel pressure to 60 psi in order to have enough fuel with E85 for 28 psi.

 

i also have a 4 inch exaughst straight back

 

hey arthur - that 4" exh will flow plenty, but if the turbine housing AR is your "bottleneck" then it doesnt matter how big the exhaust is. Usually I prefer the 3.5" because it makes the same power as 4" but quieter, lighter weight and better sounding (imo) but i have a 4" on my race car right now so go figure

 

yea its way to loud lol ...
but hey im happy with what it made. thata it for me. now moving on to trans upgrade and drive the **** outof it