had my car rolling roaded today and my boost was only at about 3.5 psi the hole way from 2500rpm up to 6000rpm with a peak of 4psi. seems low even and thought it should build with the revs.

It should be 0.3bar with is about 4psi.

What power did it put out?

Stav

156.6bhp and 143ftlb at the wheels

Hmm, thats quite low.

only 180ish estimate at the fly. is everything tight? belts, jubilee clips etc?

Is this with the standard exhaust manifold ?
There's a known problem of pre-cats (there are 2 in the manifold) breaking up and causing power loss through exhaust blockage.

TTE started including a decatted manifold as part of the s/c conversion.
Monster-Mat will back me up on this suggestion as he suffered it too - as did I.

TG

^the man has a point!

good thought there.

yep mine is de-catted. didn;t wanna run the risk of them melting/dislodging and causing problems. mark wadsworth (waddy) also had a similar problem IIRC

Yeah when i bought the charger off him he mentioned it, and gave me a spare standard manifold to decat as well.

Definatly doesn't sound like your making quite as much power.

Mine dyno'd at about 190hp at the fly, but that was with the belt slipping and dropping all boost at 5000rpm!

I would reccommend de-catting the manifold to anyone thou.

my big prob is i have got the pro-lex manifold and is fully de-cated had it dyno last year somewhere without these and it was 191bhp at the flywheel
so have managed to lose about 10 bhp

I still have the pre-cats in mine and no problems so far... get more power than I expected too.

As Stav said, were the belts etc all tightened up before it went on the dyno?

i didnt tighten the belts but that is why i started the topic the about the psi amount cos if its supposed to sit at 3.5 psi throw most of the rev range i know that is not the prob and will have to look at other things

Do you mean 0.35 Bar Boost ?

No was 3.5psi.

0.3 bar = 4.35113213 psi

So sound like theres a small leak somewhere, Check/change all the jubilee clips are tight.

Stav

As Stav has said, as thay can work loose over time

cool thanks i know to start lookin for boost probs first now