Just a quick one guys.

what would be a safe boost pressure to run with a stock ECU, running a VF34
3"TBE and over sized Top mount intercooler, walbro fuel pump and recenly had a EJ207 bottom end fitted also.
Any thoughts would be great as I,am concidering fitting a turbo smart boost control valve to pre set the boost pressure.
I have heard that the boost control solenoid would malfunction if over boosting is sensed and running to lean could be come a problem also .Cheers.

nails

i wouldnt go past 14 which is stock with out a fuel pump and ecu and tune!

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M POWER

without any other mods. I would not go beyond 15psi

if you get a tuned ECU, fuel pump, possibly injectors (440cc stock) then you could go 20 psi no probs

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RS Liberty - Because WRX's are only good for parts...

Hes got an aftermarket fuel pump. The ECU mate would be my biggest concern. Having all those mods without a decent tune could cause problems. Overboosting would be boost spiking. The ECU can only handle up to so many PSI, if it hits that or over (cold nights) it may boostcut.

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Honda Hannspree Edition CBR 600 RR - SOLD
Yamaha FZ1N - Purchased

As a dif turbo have been fitted I would keepit at the stock boost and wont rev it over 4k rpm every single gear, and the next coming will definitely is an ecu.

You can run more than 17 psi you have the supporting mods except the ecu which wont couse basiclly any harm to the engine . Sit it at 17 and thats fine all day everyday without boost cuts,thats safe boost whithout the ecu upgrade ,
But why not upgrade the ecu and run 20 psi????

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[SIGPIC][/SIGPIC]11.617 120mph

See this is where i dont get it. I hear people say throwing FMIC and turbos on, 500HP fuel pumps injectors etc etc etc without tuning their car and its fine. Yet i ask others and they say that after even slight modifications, you should tune your car as it could be detrimental to your engine.

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Honda Hannspree Edition CBR 600 RR - SOLD
Yamaha FZ1N - Purchased

Given your air fuel ratios are unknown as is your compression ratio I would stay under 10 psi until it hits a dyno!

Get it on a dyno with an accurate air/fuel meter up its rear and only then turn up the wick. As long as its not pinging or detonating and the a/f ratios are safe run a reasonable amount of boost...OEM boost cut is your next obstacle, minor but will still needs lifting to get to 17-18psi.

Until you check the airfuel ratios your really just driving a hand grenade, so keep your credit card handy.

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Speak to Shane @ SMC Tyres, Unit 6/385 Sevenoaks St Beckenham WA 6107. Mobile 0413 128 087. Tell him Maddog sent you!

Yep, definately get an ecu, then with the 207 nail between 20-24 Psi =)

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Balls.

thanks guys for the input.
Its presently running on the actuator spring pressure which is reading about 8-9psi on the boost pressure gauge for the running in period of the EJ207 bottom end.
Is there a Air Fuel ratio meter available on the market that can used to get the correct
correct ratios by increasing the boost pressure gradually to achieve the proper Lambada.Cheers.

Nails