as above

 

Id personally be using a much thinner one if its less than 500bhp

 

problem is that just brought the car
it runs 7.1 low comp, big valved head, charge cooler, t2 cam,arp bolts all round,st3 4x4 cossie turbo
and the turbo doesnt start coming in till 4500rpm

 

What thickness is that CR based on?

Personally i would look at upping the CR and getting it remapped if it was me a T3 doesnt to go as low as 7.1 compression on a decent RST motor

 

Stage 3 4x4? This means that the exhaust wheel has been cut back - something u defo DONT want. Also, what exhaust housing A/R is it? I'd also change the cam to a new std one, will make a big diff if you want the boost in lower.

 

.48 housing i think, so should i put a grA headgasket back on it AND A NEW CAM

 

.48 housing, big cam, big headwork, all the above is why the car has fuck all power below 4500.
Mainly the long duration cam.

7:1 wont make that worse, but sooooo not needed at that spec.

And a thicker head gasket will lower the comp even more.

 

Is it a 1.6?

Ford/ Payen gasket please

 

YER 1.6 WAS ROLLERED AT PE WITH OLD DODGY TURBO AT 205 AT WHEELS

 

Then use a genuine gasket

 

mines a similar spec to yours mine dont boost untill 4k its because you have
285t2 cam and the .48 housing turbo but i like mine the way it is comes on boost about 4k comes on cam hard at 4.5 k

 

WILL THAT BRING DOWN THE LAG A LOT

 

change the cam

 

No lol

But it is the most reliable gasket for a 1600.


As been said, alter your cam profile or turbo to reduce lag. A thicker gasket will lower compression ratio further.

 

THATS WHAT I MEAN SORRY IT ALL READY HAS THE THICKEST GASKET FITTED SO BY PUTTING A STANDARD THIN ONE ON A HIGHERING THE COMPESSION SURLY IT WOULD REDUSE THE LAG SLIGHTLY

 

nah not really mines the same spec but i have 7:8.1 cr but still the same lag

 

Compression dont change when the boost comes in anyhow

 

standard cam and head gasket will work fine ..

 

it could just need a setup mate if its coming on boost but feeling flat this is what mine did and you get lag between gear changes have you got a vernier cam pulley this can be set up to reduce lag slightly or could be your actuator needs adjusting

 

SAYING THAT SOMETIMES WHEN IT COMES ON BOOST IT IS STUPIDLY FLAT AND I HAVE TO COME OF THE THROTTLE AND GO BACK ON TO MAKE IT GO ANYWHERE

 

CAN YOU STOP SHOUTING!

The compression ratio has a very marginal effect on when it comes on boost. First thing is to put a std cam in - that will make a big difference. Second, if it is a stage 3 4x4 turbo, it will have cut back exhasut wheel blades. Changing to a std wheel will also help it spool up quicker.