Hi i thought a T34 would be best but not sure. it for a zetec turbo want about 350 at wheels?? is roller bearing better??

Help

Thanks

 

The advantage of a roller bearing turbo is the faster spool up time. T34 is a good all round turbo.

Martin

 

Can a T34 be roller bearing??

 

Ive got a nice T35 for sale, im sure that will pull it along fairly well

 

gt3071 gets my vote

 

Lol, cheers for your info chip.

 

HX30 would be perfect.

 

a gt28 would be better for that power

 

No GT28 will do 350bhp at the wheels on a Zetec.

 

how do you know this if you dont mind me asking? What power could a blacktop do at say 19psi on a gt2871 ?

 

GT2871 52 trim, will be about 350 at the flywheel with 20 psi accoring to the compressor map.

 

and thats only 20psi on the baby trim 52!

 

Even on a 56 trim, compressor map says no.

 

For over 400bhp at the flywheel?

I totally disagree with you, but then what would I know

 

yes @20psi, mine does at 1.8bar. Theres more to it than the map.

 

At 1.8 bar and 350whp your off the map mate.

 

i know you have mapped a few gt30 cars ,but a 28 can do 400 fly on a zetec

 

If you are talking one of the bigger 28s, then yes im sure it can, but I still think a GT30 is a better choice though as it will do it far more easily and almost certainly with lower EGT's

 

now thats a fair point .

 

Out of intrest what would the t34 make on a zetec with a .48 and again with a .63

 

Totally depends on the rest of the spec, but on a standard YB for example you tend to gain about 20bhp from the bigger housing.

 

So what would be the max on say a .48 t34 blackTop with standard cams

 

Ive not built or mapped that configuration of engine so would be guessing.

Things like compression ratio, and what manifolds you use, and what exhaust you use, will all have a bearing though, as will where the cams are timed in of course!

The turbo itself works very well at 350ish though, so thats what I would expect to see comfortably if you get the rest right.

 

True, but pushing a turbo off it's map is the way to get the best reponse and performance, but obviously with reduced life span. Unless you're an OEM, choosing a turbo based on the the compressor map and your desired power isn't the way to go.

Look at a T34 compressor map, the GT28 56 trim flows a fair bit more than that, and they have done 400hp plus many many times.

Rick

 

well im lost..Head will have standard valve size but ported. pistons not sure at min but have focus rs ones for now also not sure on manifold

 

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