Hi all . Can any one tell me what's the max boost you can run though a vf36 turbo . Cheers .

 

I assume is the same as other ihi turbos most are mapped 1.5bar peak.
If this is Rickya old car we are referring to id say the current power for the spec is about right.

 

Yes it is pal . Was hopeing to push it to 1.7 bar . Read on a few sites the turbo should do 400 bhp . And Ricky was making 365 ish at 1.5 bar .

 

A lot of high figures get thrown around when its comes to turbos the rest of the cars spec plays a big part in it too, but when it come to the turbo the md321t is a 400bhp turbo for example. The ihi turbos fall a bit short I have a vf37 @1.5bar making a little over 350bhp. A vf36 tends to make around 370bhp hence your currently about right. It's always better to run a larger turbo at less pressure than a smaller turbo maxed out. IMO 1.7bar is ti much for an ihi turbo.

 

Even if it did manage it, boost probably tails off a lot

 

Why not 1,7bar ?
Group N rallycars are also running that amount of boost, but of course boost tails off at redline.
I am running a VF43 @ 1,7bar tailing off to 1,0bar at redline.
Of course max bhp is limited, but if it is possible to raise torque in the midrange do it !!

 

Pick up a nice sc42, 1.5bar, tail off to 1.3 and 420bhp with a standard sti8 engine..

 

A standard VF36 won't hit 400bhp, it would need some work on it to get close but I doubt it would hit 400

 

Has any one ran more than 1.5 bar on a vf36 ??

 

My understanding is ihi turbos don't like running more than 1.5bar unless someone can clarify? Poss due to life/wear and control.

 

this is my understanding as well, something to do with the speed of the compressor wheel when pushed any higher makes it not as safe as it could be. Plus 1.5 bar midrange won't make any more power up top, if your tailing off up top then see what you can do about that - maybe bigger exhaust, port the turbo housing, ported headers etc. to get things flowing smoother/better then see if you can maintain the 1.5bar for a little longer to increase the top end hp.

 

Virtually what Bob Rawle told me 3-4 years back, need serious porting to exhaust side but won't flow enough for 400 even with meth...if I've remembered that correctly, I have up on chasing it

 

Virtually what Bob Rawle told me 3-4 years back, need serious porting to exhaust side but won't flow enough for 400 even with meth...if I've remembered that correctly, I gave up on chasing it