93hatched_projekt

I'm currently in a bind right now . My rings just went out on my h22 and now it's time to re-sleeve and build a stout motor good for around 400whp (street) 500whp(track). I currently have a 38mm turbosmart wastegate , and need to know what the limitations of the 38mm wg are. I'm running a sc61 now , but may upgrade to somthing bigger in the future. I have a buddy that wants to buy my wg , so I'm trying to figure out if I should sell and upgrade. How much power are people making with a 38mm wg and at what point would it be wise to upgrade?

Mase

its not so much power wise.

the more boost, usually the easier it is to regulate boost with a smaller wastegate because you are not releasing as much exhaust energy before the turbo on high boost as you are with low boost.


a lot of it comes down to manifold design.... how big your turbo is, how much it flows, etc.


ive tuned multiple 600 whp cars with a 38mm wastegate.

93hatched_projekt

Thanks, maybe I'll stick with what i got. I have a equal length manifold similar to a ramhorn with a 3"dp into a 3"e-cutout. I have the base of the shelf sc61 . Bump for more replys

JDogg

if you want to run low boost (under 15psi) then you need a big wg.. 44-46mmish. if you are only gona run higher boost, keep the 38mm

whoneedzvtec

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">if you want to run low boost (under 15psi) then you need a big wg.. 44-46mmish. if you are only gona run higher boost, keep the 38mm</TD></TR></TABLE>
i thought it was the other way around?

JDogg

nope... read what mase said.

at high boost you want all your exh going though the turbo (small wg).. at low boost you need to bypass more exh gases to keep the boost down (big wg)

darkdayz

learn something everyday

nevin

h22 has more displacement and will still possibly creep, you would be fine if it was 1.8 liters though.