G'day all,
I am just finding my way through a turbo setup for the first time, coming from only n/a performance before this. The setup is on my RB30E in my R31 skyline, I realise this isn't the R31 club but my question relates to turbo motors in general. What sort of gain might I see, from using a stock cast iron log style manifold, to a mild steel steampipe style manifold? The price difference is maybe $150 - $200 for stock manifold and $330 for the steampipe style manifold, which is a highmount also, if that makes a difference.
Here is a picture of each so it is clear which manifolds I mean:
http://img690.imageshack.us/img690/1058/rb301.jpg
http://img153.imageshack.us/img153/7128/rb303.jpg
Stock manifold
http://img.photobucket.com/albums/v211/das_moogan/VL%20Turbo%20conversion%20smaller%20pics/VLTurboTopView.jpg
My setup isn't going to be huge, just an rb25 turbo for the moment, Bosch 271cc injectors, 2.5" exhaust with high flow cat, cold air intake, 10mm leads, front mount intercooler and 2" piping. I am hoping for a responsive setup, with at least 160rwkw through my 28spline minispool diff.
Would I see any advantage with the better manifold? Or is it a substantially better base if I ever do go chasing more power?
Thanks for your help / input.