Is 450-500 WHP achievable with boost being under 24 psi (being very conservative on the boost)?
I am asking this question cuz I am trying to understand whether I could possibly have all the bolt ons (intake, tbe, headers, cams/cam gears, injectors, tune) and run @ 24psi but with a bigger turbo (say the 35r or so). would that setup be safer on the engine than running the big 16g @ lets say 28psi to possibly achieve the power?

I am trying to plan the safest setup possible, I am still considering a factor of failure in their simply because something in the drivetrain might not be able to handle that much power.
ur thoughts are greatly appreciated guys. Thanks!

 

Not too sure at only 24psi and pump gas timing on the stock block and head. Likely not without increasing CR

 

i guess in other words, currently i have an 06 ix, planning on getting a tbe, intake, and a tune @ stock boost. Looking at some of the dyno numbers around here, everyone has been saying that i should be expecting around 330whp. well, what if i only replace the stock turbo to the 35r and keep the boost at the same level which is around 20.5psi, my question is , how much power should i be expecting then?

ps. excuse my ignorance but what is CR?

Thanks

 

not only do you have to consider the boost but also at what lbs/min does the turbo flow. Because I don't think that 24psi on a green is the same as 24psi on a 35R, the bigger one will create more stress on the engine, please correct me if I'm wrong.

 

cr= compression ratio.

Bigger turbo with the same boost will make more power, you wont make 450-500whp on a 35r on 20 psi i can tell you that much.

Scorke

 

Sorry CR = Compression Ratio

 

ya i was exaggerating about the 450whp on 24 psi but i think u get my drift here.
how about the question on how much power will i be making with just an intake, tbe and boost @ 20.5psi with the 35r, any predictions?
and would this setup be more stressful on the engine than running the stock 16g @ 24psi?
assuming that compression ratio stays constant.
Thanks,

 

370 whp

Less stressfull.

Scorke

 

Bolt ons and a turbo upgrade would be hard but it is achievable with some motor work. Here is a car we built with a 2.3RR and a 35R on only 22 psi and its making over 490 to the wheels on 93 octane with a conservative road race tune.

https://www.evolutionm.net/forums/au...nd-inside.html

Now this car has a great deal of time and money in it but the engine platform is something that is very easily replicated.

Eric

 

i would be more worried about your clutch or tranny going out then the engine.

But I can garuantee you that a stock 16g at any psi will not reach 450 hp.

a bigger turbo at the same psi will hold more power, but a bigger turbo at less psi thats flowing the same rate as the smaller turbo at higher psi is not going to make a difference on the stress of the engine. The only thing is running more boost you might run into knock problems.

 

WRONG!

A bigger turbo running less boost to equal the same WHP as a smaller turbo running more boost does so with lower EGT's, lower backpressure, less heat in the bay, lower IAT's, all things which contribute to and cause engine and overall fatigue.

Scorke

 

Eric,
That is a great set up u guys have done, very well done.

Def1,
Ya I am not expecting the Drivetrain to take that much power. but i was always curious on what does it come down to what the main reason is behind busting out those engines. Would like to do more research, but it seems like higher boost with a bad tune is usually the key.

 

so it is safer, isn't it?

 

We have made 438whp at that level on stock cams in a IX, and 436whp on an VIII with HKS272s with the ETS61mm (comparable to the older style 35R). I think a cammed IX with the HTA3582 should be able to come close.

And yes, wringing 450 out of a big turbo is alot less mechanical stress than a small turbo, but the fact is power=cylinder pressure so even if the IAT and EGT are lower the cylinder pressure is going to be comparable.

 

your mods +150 shot of nos at that boost level and turbo set up