How much boost can an sti safely run at before the blue smoke and melted pistons?

 

Chris
My sti 2 is currently running 1.4 bar dropping of to 1 bar at the top end . It hasn't gone bang yet .
Dave

[This message has been edited by Big Bear (edited 02 December 2000).]

 

Chris - Im running 1.3 max on my STI5. I have HKS EVC set at 1.1 or 1.3 bar. Ive had check on rolling road at PE and fuelling ok at that level. Im now using Millers octane booster with Super Unleaded which I hope will do some good as Japanese use 100 gas. Im having another go at PE soon to check results at higher boost levels - see what happens. As to when it goes bang - your guess. Let me know when you find out the hard way!

 

I have a MY94 WRX and run 1.2 bar peak, and 1.1 held. I wouldn't go much past this without fitting STi head gaskets at least!!

 

my00 with PPP; peak at 1.3 bar, held 1.1 (until about 5k, then drops .05 bar held).

How accurate are the in-car guages? I've got a Lamco dealer-fit STi style one.

Richard

 

MY sti3 vltd peaks at 1.4 bar and drops off to around 1.1, seems ok and as far as i am aware the ecu is stock sti.

cheers Scott

 

Stuart, I have a MY93WRX so should be safe running at similar to yours...which remap did you get to boost to 1.2/1.1bar?

Do you use superU? I do and run 0.8bar (unmodified) - is this normal?
When I use NUL the boost doesn't change, surely this is wrong? (or it can't set boost/timing low/retarded enough)

 

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:<HR>Originally posted by phil_ng:
<B>Chris - Im running 1.3 max on my STI5. I have HKS EVC set at 1.1 or 1.3 bar. Ive had check on rolling road at PE and fuelling ok at that level. Im now using Millers octane booster with Super Unleaded which I hope will do some good as Japanese use 100 gas. Im having another go at PE soon to check results at higher boost levels - see what happens. As to when it goes bang - your guess. Let me know when you find out the hard way![/quote]

phil ng- Ý'm running 1.2 low 1.3 high with HKS evc4 on my 98my,using 95 octane and drive at 7000 rpm in the 5th gear long distance.so far so good.

 

Spence27, my 93 WRX holds 0.8 bar as well so you're in the right field. I wouldn't use NUL if I were you due to the Japanese fuel situation and detting. I use SUL and Millers octane booster.

 

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:<HR>Originally posted by hako:
<B> phil ng- Ý'm running 1.2 low 1.3 high with HKS evc4 on my 98my,using 95 octane and drive at 7000 rpm in the 5th gear long distance.so far so good.

[/quote]

 

 

Ý have a frontend oil cooler and upgraded oil
pump in my 98my impreza turbo.On motorway driving water temp.drops to c-level and even
lower.Ýs this bad or good?please advise