pete-si

Hi. This is the first time I've posted. I've researched different threads in various places about "safe" psi on 2.0 silver top turbo. I know I'll get the whole 'should have done it properly' etc, but here is the basic spec of engine.
-standard Pistons/rods
-decomp plate (I know I know)
-arp bolts in con rods
-uprated valve springs
-lightened flywheel
-vxr injectors
-pectel t2 management
Etc etc

The question I have is. What psi? Many contradicting info I've gained got me thinking.
I'm not expecting a bullet proof animal.
Roughly, is 10psi 200bhp and is 11psi around 220bhp?
I'm tempted with 11psi but wondered if anybody else has experience.
Ps the car is built and running, just waiting mot and mapping session.
Thanks in advance

big_wasa

Having talked to Bailey performance he has indicated 250bhp is max. Around 14psi but this depends on lots of things. He also says no need for a decomp plate if you make sure there is no det.

studabear

What turbo?

Turbo A could be flowing a lot more air than Turbo B at the same psi

pete-si

Sorry. T3
Thanks

RichieST

iTrader: (2)

No matter what turbo it is, if the pressure is the same, the turbo will always be flowing the same amount of air. The only thing that would change this is if the volume of space increases, by either a bigger capacity engine or longer boost pipes/bigger intercooler etc.

Karl @ FPT

This is a very important question.
What's the spec of your T3, a RST T3 flows a lot less air than a 4wd Cossie T3 for example?
That's incorrect mate...
Boost pressure is relative to an engines VE and is no indication of flow... a small T3 at 10psi will make much less power than a larger T3 at the same boost pressure because it flows much less air... the smaller T3 is restrictive and decreases the engines VE.

pete-si

It's rst t3. Thinking 11psi. Around 210-220 bhp I think would last a little bit. I'm no hooligan behind the wheel

RichieST

iTrader: (2)

Sorry don't quite understand! The way I see it, an engine at 2000rpm for example requires a certain amount of air. A 2 litre engine wants 2 litres of air for every cycle. If it's compressed to 10psi it will always need the same amount of air no matter what is forcing it in. If you flow more air in to the engine for every cycle, the pressure will increase?

Mk4 Rick

Ive seen these run 200bhp on a 1.8 zetec engine with a decomplate at 10 psi with t3 turbo and ofab managment using beige injectors.Fueling was a bit rich but ran great