garethbrunt

Hi Guys,

Can anybody tell me the max boost that it is possible to run on an STi 3 internals and turbo with a power FC?

Thanks in advance.

banny sti

iTrader: (68)

The maximum boost you can run with a vf23 on an sti 3 is 1.4 bar but your best off staying just under 1.4 bar. I am currently running 1.35 bar and its fine.

sti 360

iTrader: (1)

can you tell me what a sti v2 can be pushed to please
thanks matt

cossie01

Hi

Sorry to jump on this thread, but thought best rather than start a new 1

Does anyone know what the max safe boost level is you can run on an Sti 3, with standard ecu, the car is running a full 3" system including de-cat, a k&n and bov.
Other than that engine wise it's standard.

It was running 1bar when I bought it, however there was a slight exhaust leak and also the clutch was shagged.
I have just got it back after having the clutch replaced and now it's running 1.2bar and I want to be sure this is safe (as I don't want to be melting it).
If it's not safe what is the max it should be running.

Cheers

P.s I only run it on optimax or if im caught short bp ultimate.

Mad Hammer

iTrader: (55)

1.2 is normal but I would be running booster if I was you. Also get yourself a knocklink.

My STI 4 would det at high revs with a de-cat before I went the Apexi route

Houghton

iTrader: (1)

Definitely a KnockLink. Optimax + octane booster and stay away from BP Ultimate. Meanwhile save up for an Apexi P-FC

cossie01

Cheers lads

Got myself an AFR Gauge to put in tonight, so atleast that will give mea slight warning, if im lucky

911

fwisw:

I ran my Sti v3 with 3''decat and Optimax @ 1.3 bar = 314 bhp/280 lbft. Ran for 2 years and raced at this level. Head gaskets blew!

Fitted head studs, heads done by API Engines, added lots more and now the same stock engine runs 407 x 340 on Optimax and boost addative (absolutly essential).
Running 1.4 peak on a TD o5 20g.

Exactly as Gerry states, get an Apexti FC mapped by a proven expert, ie Andy F, now available on Group Buy @ £650.

Cracking solid engine, but only on Optimax + NF!

Graham

cossie01

Ok cheers guys, just been out in it for a propper run, and the peak is 1.25 bar but it seems to be anywhere between 1bar and 1.25.

In 1st it's usually 1bar max but in 2nd and 3rd 1.2bar and then 4th and 5th it will creap up tp 1.25.

Would it be best to turn it down to 1 bar max ?

Whats the best octane booster to use in it ?

911

I believe that you get (generally) what you pay for.
Lots of opinions of course (and here is another), but AndyF said NF Booster should be used in my '407'. Very expensive for everyday use imho, but essential for my Weekend Warrior.
That is the gain with the apexi, can be mapped for optimax (or straight unleaded!) the power is simply less with the poorer fuel rating (obviously).

I ran my Stiv3 on Optimax and 1.33 max boost spikes to 8000 rpm and thrashed it to near death(stock ecu). Gasket suddenly gave up in the end.

David at API was impressed with the engine internals when we took the heads off at API.

Graham.