Turbo choices for an 06 STi ?
24 December 2007, 08:05 PM
#31
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Spool up is almost identical, torque also very similar but is achieved with slightly lower boost. Power is up by approx 20bhp over 5000 rpm.
The VF43 is actually a pretty good turbo, easily the best of the VF's.
On a 2.5 WRX for example then a 20G is an excellent upgrade but on a 2.5 Sti it is quite a small step up from the VF43, if you're serious go for a 321T and a set of 650cc injectors. 400/400 quite easily and at comparatively low boost.
The VF43 is actually a pretty good turbo, easily the best of the VF's.
On a 2.5 WRX for example then a 20G is an excellent upgrade but on a 2.5 Sti it is quite a small step up from the VF43, if you're serious go for a 321T and a set of 650cc injectors. 400/400 quite easily and at comparatively low boost.
25 December 2007, 10:00 AM
#33
Could you not achieve a steady target boost on the 2 port ? I find that most of them only need IRO 45-60% duty over 5000 rpm so achieve target boost comfortably.
If you don't optimise the control parameters its very easy on a 2 or a 3 port, to make too much boost and lose power at higher rpm.
If you don't optimise the control parameters its very easy on a 2 or a 3 port, to make too much boost and lose power at higher rpm.
It is a great std turbo but asking miracles from it from a flow point of view just doesnt work.
Next step is something slightly larger.
25 December 2007, 10:24 PM
#34
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AtJ (after a bottle and a half of wine
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