Originally Posted by 2001ode
Hi,
If i understand STU lesson very well, no, this turbo is not for your requirement, because efficiancy island is out our 400 bhp.
This turbo is good for 300 / 350 bhp only ( 30 / 35 lb/mn. air flow)
For 400 bhp, it is better to use your first map of GT254OR 76 mm. 48 trim, 0,76 A/R. With this, for 400 bhp, you run with 1,8 bar of TC pressure, you are in good position on Efficiancy Island, and you are just on dotted line.
Regards.
Claude
Hmm thgats what I thought, I thought maybe I could sacrifice a bit of efficiency top end for lower down poke but if its a unsuited turbo i'll end up hating it anyhow.
So 1.8 bar of boost equates to 2.8 on the map as you already have 1 bar atmospheric am I right? which as you say puts me on the dotted line on the gt2876r map.
I'll get this confirmed and then start to source one
Dan