Single Turbo, but what size?

[zentac]

Im thinking of going down the single turbo route, but cant decide what size to go for..... thinking along the lines of a GT35R

what your opinion ?

[enigma]

BIGGER!

[zentac]

how big?

[AllBeItMine]

GT35R would be plenty. its a nice sized turbo for the car.

[zentac]

GT35R would be plenty. its a nice sized turbo for the car.

I think dave is right, if I want 600bhp without nos then I may have to go larger, need to do some calculations and see what I can come up with.

[AllBeItMine]

GT30 (1.06 AR) running 24PSI will produce roughly 575hp at the engine an flow roughly 50lbs per minute. turbo rated at 600hp

GT35(1.06 AR) running 28PSI will produce roughly 630hp at the engine and flow 57lbs per minute. turbo rated at 700hp

[enigma]

This one!

[zentac]

Nah, Lag City.... Been doing some calculations and the GT35R is about right. The 2.5ltr engine will kick out enough are to spool it nicley without too much lag. If I bore out to any larger then I can go GT40.

[The Vee]

This one!

That's one awesome...........................Tuba

[enigma]

OK, how about this one

Ball bearing low lag

[zentac]

Now, heres an idea.... Tri-Turbo ? Use the two small turbo`s that weve got to spin up a larger one...pipework would be a nightmare but it would be interesting.

[enigma]

Pipework would be easy?

Not sure that cold compressed air would spin a turbine very effectively though!

[zentac]

Anyone know of any good companies to make me up a set of manifolds so I can go single turbo?

[enigma]

I have told you before you dont need manifolds making!

I will draw you a picture!

[bradc]

There is a mercedes diesel with 3 turbos, I made a post about it a while back, you could keep the td03's for the low end, then go with a real big turbo for the high end.

[enigma]

Like So

[Quail]

^ So your saying you could just have pipes fabbed up to bring the exit of the original manifolds to the side of the engine?

Seems like a good idea! Would lag not be an issue, as it would be bascially a 6 - 1 manifold! And the 1 runners would be pretty long?

[enigma]

shorter than those on Impezzas and they seem to be doing OK at the moment!

The rear manifold has the exhaust facing up, the front downwards - so you would need a rear manifold on the front head......no problem at all!!

Would make it all myself too!

Would need to swap the inlet manifold - but I would have plans for that too so you could get to the rear plugs!!

[zentac]

thats how I was going to do it as but start with new manifolds as Im not sure you will get a back one on the front, as I didnt think the flange and the exhaust ports were symetrical.

Or are you proposing to chop the flage off and re-weld it back on? ... can you weld to cast manifolds?

[enigma]

The back and front heads are the same basic design. Therefore a back manifold will fit on a front head.

Easy as!