Boostage

Between a .70 a/r t3 housing and a .58 t4 housing. which one would spool quickest on the same turbo? I know generally t4's are bigger but does that apply here?

Boostfed

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostage &raquo;</TD></TR><TR><TD CLASS="quote">Between a .70 a/r t3 housing and a .58 t4 housing. which one would spool quickest on the same turbo? I know generally t4's are bigger but does that apply here?</TD></TR></TABLE>


I would ASSume the T3 .70 A/R would still spool quicker. I may be wrong though never tested it.

turbodano

A/r is relative to frame size. The question you have asked is a good one but can't be accurately answered without out more info on the housings in question.

I know what you are getting at so I will do my best to help you understand the difference in a/r from different frame sizes.

The t3 and t4 families are very close in size but not in flow. The T4 .58 would have a larger area inside the housing so it would flow more. The .70 a/r is a smaller frame size unit so it would spool better but at the same time max power would be choked down from the lack of area inside the housing.

Here are some horse power numbers that I have seen from frame size to frame size. The .70 a/r t3 unit that we use has made as high as 736 whp and the largest comp wheel we could use was a 66mm. The T4 .58 allows us to go up to the 76mm compressor side and we have made 980 whp with it before it was maxed out.


I hope this helps.

Boostfed

Well Geoffery, I thought about testing it for you BUT then you have to have a manifold that is dual drilled for T3 and T4 and that again would not be a TRUE test since the inlet of the manifold would need to be a T3 firstthen I guess bore it out to a T4. InlienPro's T4 manifolds are dual drilled but to use the T4 you need to machine it out


Be alot of work