turbo confusion
right iam after 280whp on 1.8 1996 trying to decide what turbo is best.basically want to thrash it on track.
i asked the uk garret dealer about the disco potato gt 2860rs he doesnt recommend 0.86 ar on turbine side for anything under 2.5 litre engine capacity. and says the 0.64 is better do you agree with that? from what i read on here larger turbine a/r is better for sustained high rpm use so does that mean the .64 is no use for me? i also read that the gt2860rs and gt2871r and gt2876r all have the same hotside turbine trim and wheel dia so they should all take the same time to spool up.so does that mean i should go with the gt2876r as it has a bigger compressor would it make more power accross all the rev range? or is a combination of bigger turbo gt2876r and smaller ar0.64 the way to go?so many things to think about ive got a headache please put me out my misery:bang::bang::bang: |
Originally Posted by delcbr
(Post 622187)
i asked the uk garret dealer about the disco potato gt 2860rs he doesnt recommend 0.86 ar on turbine side for anything under 2.5 litre engine capacity.
from what i read on here larger turbine a/r is better for sustained high rpm use so does that mean the .64 is no use for me? i also read that the gt2860rs and gt2871r and gt2876r all have the same hotside turbine trim and wheel dia so they should all take the same time to spool up. blah blah blah |
Your garret dealer is full of crap.
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Originally Posted by delcbr
(Post 622187)
i asked the uk garret dealer about the disco potato gt 2860rs he doesnt recommend 0.86 ar on turbine side for anything under 2.5 litre engine capacity.
and says the 0.64 is better do you agree with that? This is my car with a turbine housing that's obviously too big on a BEGi log manifold at 16psi. http://i44.tinypic.com/29z1kqt.jpg The gang of FMII cars that day made between 210-230whp at the most, and I'd estimate that your car would do the same on this dyno. I like my 2860rs/.86 because 16psi is right in the fat of the efficiency (I presume judging from output "delta") and any more power than that is going to drastically shorten the life of the trans. I have a grossly superior set of hot-parts now and have the boost turned down to 11psi and making slightly less power and happier for it. |
Originally Posted by ScottFW
(Post 622274)
The .64 will spool sooner but not flow as much up top. On track where you'll never be below 3500-4000 rpm, you want the .86.
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