i have a 2wd sapphire cosworth away to rebuild the engine. also sorting the turbo. was wondering whats the best to do with the turbo. i currently have the standard turbo and wondered if it would be best to rebuild the standard turbo or replace it with another. the car currently runs a stage 1 with a possibility of upgrading to a stage 2 setup at a later date. any suggestions would be appreciated

 

A lot depends on budget and future long term plans.
A T34.48 equipped cossie on stage 3 is a hell of a road car imo, may want to consider upgrade to T34 ?, at the very least if rebuilding the turbo get a 360 bearing, will last much better.
tabetha

 

or if you're not ready for a T34, try finding a good condition 4wd turbo and whack a 360 degree thrust bearing into it.

 

i was considering a t34. is it a simple straight swap from my standard 2wd turbo?

 

Yes but as with all things it's not simply a case of just fitting the components on, you would need a calibration to suit (Remap)

T34 is a cracking turbo!

What HG do you have?

Martin

 

the car just has a chip for stage 1 can tht chip be adjusted to suit or would i need a new chip? also what u mean by HG?

 

Nope a new chip as that turbo will massively effect things like VE etc, HG= Head gasket.

If going for the larger turbo you are effectivly converting the car to a stage 3 as such you are now going to be producing more boost and we need to fuel for this extra boost, as such the fuel injectors will need upgrading to Bosch (Dark green 803's) or Siemens 55LB, you will also need to uprate the MAP sensor as the standard 2 BAR item will not be able to see the extra boost, all of the above will render your existing chip useless!

Martin

 

is it possible to use a t34 but run on on the same amount of boost as stage 1 therefore keepin the current chip, injectors etc. as im away to rebuild the engine and was hopin to up the power at a later stage. im fitting the car with a stud and nut conversion along with a group a head gasket

 

a bigger turbo at the same boost will be flowing more air than the smaller turbo so no mate

 

so ill probably be best just stickin with the standard turbo for now then as im not sure how far im wantin to go with it am i right in saying the standard turbo can be used with a stage 2 setup?

 

Yes unless you plan on running the boost a T34 can produce then there would be no point in uprating.

Tbh stage 2 isn't really heard of anymore, if it were me I would go for uprated injectors Bosch or Siemens 55LB a 3 BAR MAP sensor and yes the T3 will produce the boost, at the moment you are probably running around 15PSI, I should think you would see circa 310HP with this setup but more importantly more torque as well.

Martin

 

thts probably what ill do im plannin on keepin it the way it is just now then upgrade maybe next year. am i right in sayin after fitting injectors MAP sensor. bosst is then put up to 22 psi with a remap?

 

Yes thats around the sort of boost, but be sure to get someone to check the fuelling etc is ok!

Also have you rewired you fuel pump and fan circuits?

Martin

 

yeah ill do that. well the fans are wired up to a switch and i think the fuel pump wiring is just how it was from factory

 

LOL classic bodge of wiring into switch, that switch will melt if that have used it alone, plus it's an automated system for a reason, so needs rewiring. It woulden't surprise me if they have used piddy wiring either!

Martin