Quick question re turbo suitability
Hey guys, im just after a bit of info as to the suitability of a turbo for my wants/needs..
My car has had sequential twins ever since i got it quite a few years ago (running stock 16bit ECU), and I have started thinking id like to convert it to single turbo for a bit more power and consistency of power delivery.. I daily drive the car, and i think I would be happy with a responsive 350whp setup. I acquired a turbo for a really good price without really having an idea if its suitable for what I want.. Specs are as follows..I had a bit of a read of the compressor map thread to try to make sense of it all but am still confused.. Its a gt3540, with a T3 Flange.. Turbine Housing A/R:.82 Comp. A/R:.70 Turbine wheel size:67.8 in ,76 out- trim 55 Compressor wheel size:61 in , 81.7 out - trim 48 I searched gt3540 a lot but pretty much all referenced a t4 flanged version.. Will this turbo do it for me? i.e. 350whp? responsive? (with supporting mods of course) From what little I understand i don't think im asking too much, but really I have no idea. I would prefer to make the manifold a t3 flange, over getting a t4 flanged turbo if I can get away with it. cheers |
I worked out the area of the turbo's wheels (in inches :scratch:) as per Howard Colemans thread. :icon_tup:
I came up with; Compressor wheel area = 6.33" Turbine wheel area = 6.31" For a relationship of 99.98% I guess I should just proceed and use a t3 flange? Will it hurt that much considering my goals? The wheels area looks to be of an ok size for my applications (i think). cheers |
I think thats a great little turbo. Should be very responsive and should reach your target HP goals.
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T3 flange GT3540 will be great for your power goals/use as the smaller volume exhaust manifold runners and turbo exhaust housing will provide move velocity for faster spool and still support 350rwhp fine with that big exhaust wheel.
I would prefer to make the manifold a t3 flange, over getting a t4 flanged turbo if I can get away with it. Yep, do that. I would avoid a log style collected manifold if possible though and make one where the runners are near parallel to each other at the turbo flange and thus merge at a shallow angle into the T3 open volute flange. |
Cool thanks for that guys, just needed a little reassurance :nod:
Will try fab up a manifold just for it :icon_tup: |
Change of plan, am now going with a borg warner S360, T4 divided/twin scroll
I decided it was too much hassle for what its worth to do it properly with the T3 flange turbo. I could not find any T3 manifolds, and having a manifold fabbed especially for it (with either smaller dia runners, or runners that tapered down to a T3), was too much money & effort then it was worth putting in to run that turbo. And i could not bring myself to use an adapter, or weld a t3 flange onto a T4 manifold and screw the flow up majorly. So im a few hundred down on buying that other turbo, but I think ill be better off and happier in the long run. |
Make you run a twin gate setup with the twin scroll.
Really does make a substantial difference to spool. |
Originally Posted by rx72c
(Post 11854408)
Make you run a twin gate setup with the twin scroll.
Really does make a substantial difference to spool. I have already wasted money on crap, where that money could have been put towards what I should have just got in the first place. I know its been said so many times... But, do it once, do it right. Even if it takes a whole lot longer. You will come out better off in the long run :nod: |
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