OrangeBoost

Ok so Im looking to pick up a Super 60 for my D16. Ill be running 15-20psi and I use this car for everything from street, strip, auto-x.

Ive decided to go with the .48A/R turbine housing but I have the choice between a .42A/R and .60A/R compressor housing.

Which should I go with and what effect will this have?

JDogg

the bigger the compressor a/r the more efficent the compressor is.. get the biggest one you can

OrangeBoost

SO if this is true wouldnt compressor maps change according to housing A/R?

Schister66

yes they do change...the efficiency island should move up into a higher area...it will be a little less efficient at lower power, but better at higher....i hope i said that right

OrangeBoost

Ok that makes sense but nowhere on the compressor map do I see it specifying the compressor A/R? So how do I know?

Would a super 60 map generall be for the larger or smaller housing?

k24em2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Garrett Turbos &raquo;</TD></TR><TR><TD CLASS="quote">Compressor performance is comparatively insensitive to changes in A/R. Larger A/R housings are sometimes used to optimize performance of low boost applications, and smaller A/R are used for high boost applications. However, as this influence of A/R on compressor performance is minor, there are not A/R options available for compressor housings.</TD></TR></TABLE>

OrangeBoost

Ok so it says smaller A/R for high boost. Would 17-20psi be considered high boost?
In which case I should go with the smaller housing? Intuitively this doesnt make sense to me.

Can someone please explain further?

EK k kay

I'm wondering the same thing. I have a Super 60 with the .42 a/r comp housing and was wondering if upgrading to the .60 a/r housing was worth it.

k24em2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Garrett Turbos &raquo;</TD></TR><TR><TD CLASS="quote">Compressor performance is comparatively insensitive to changes in A/R. Larger A/R housings are sometimes used to optimize performance of low boost applications, and smaller A/R are used for high boost applications. However, as this influence of A/R on compressor performance is minor, there are not A/R options available for compressor housings.</TD></TR></TABLE>

No.

OrangeBoost

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by k24em2 &raquo;</TD></TR><TR><TD CLASS="quote">

No.</TD></TR></TABLE>

Care to go into a little more detail?

k24em2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Garrett Turbochargers &raquo;</TD></TR><TR><TD CLASS="quote">Compressor performance is comparatively insensitive to changes in A/R. Larger A/R housings are sometimes used to optimize performance of low boost applications, and smaller A/R are used for high boost applications. However, as this influence of A/R on compressor performance is minor, there are not A/R options available for compressor housings.</TD></TR></TABLE>

For the third time.

boosted92

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by k24em2 &raquo;</TD></TR><TR><TD CLASS="quote">

For the third time.</TD></TR></TABLE>

Cliff notes: Changes in compressor A/R alone will have little to no effect on turbo performance.

OrangeBoost

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by k24em2 &raquo;</TD></TR><TR><TD CLASS="quote">

For the third time.</TD></TR></TABLE>

My bad. I didnt realise you were replying to that post asking if it was worth it.

I thought you were disagreeing with that info.

elpiar

AFAIK you need the compressor housing to be large enough for the compressor wheel trim that you have. For super 60 or 60 trim, you want .60 a/r

k24em2

A/R has nothing to do with how big the housing is physically. It's just a ratio of the radius of the scroll and how far away from the center it is.