GT35R on a Subaru STi... .63AR or .82AR? Oh the choices

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11-30-2005, 10:05 AM

.RTErnie

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GT35R on a Subaru STi... .63AR or .82AR? Oh the choices

i'm putting a GT35R on my best friends car...but I can't decide whether or not he should go with the .63 or the .82? I figure since its AWD go with the .63, but then again we all like the top end power...and it IS a 2.5L He's set on the .63, but I think the .82 will be the "better choice" what do you guys think?

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11-30-2005, 10:14 AM

wantboost

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Re: GT35R on a Subaru STi... .63AR or .82AR? Oh the choices (RTErnie)

the .82 will spool really fast. its ball bearing and its 2.5l of displacement... he is stuck in the mindset of typical turbo characteristics...

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11-30-2005, 10:18 AM

ValleySyder

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Re: GT35R on a Subaru STi... .63AR or .82AR? Oh the choices (wantboost)

hmm i would def go with a .63 .. believe me espically if its a street car.. we have a STI with a Precision GT3576R . 63 hotside and i think it doesnt really have a good useable powerband.. so dont go with an 82. post up result and let me know how u like the powerband

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11-30-2005, 10:44 AM

turboedc2

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Re: GT35R on a Subaru STi... .63AR or .82AR? Oh the choices (ValleySyder)

82.ar more top end

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11-30-2005, 11:19 AM

.RTErnie

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Re: GT35R on a Subaru STi... .63AR or .82AR? Oh the choices (ValleySyder)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ValleySyder »</TD></TR><TR><TD CLASS="quote">hmm i would def go with a .63 .. believe me espically if its a street car.. we have a STI with a Precision GT3576R . 63 hotside and i think it doesnt really have a good useable powerband.. so dont go with an 82. post up result and let me know how u like the powerband</TD></TR></TABLE>

can you post your dyno plot? what are you revving to? I think we'll up the RPM by another 1000 rpms to make use of the turbo's power. Rev to 8k. I'm thinking that the .63 may be the way to go.

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11-30-2005, 01:52 PM

ToasterOven

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Re: GT35R on a Subaru STi... .63AR or .82AR? Oh the choices (RTErnie)

.63 unless you wanna spray a 30 shot to help her spool up then go with the .82

but overall the .63 would probably be the better choice on the streets...now on the freeway thats another story

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11-30-2005, 03:23 PM

rhd

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why don't you just go ask kingpin?

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11-30-2005, 03:24 PM

PeakBoost

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Re: GT35R on a Subaru STi... .63AR or .82AR? Oh the choices (RTErnie)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RTErnie »</TD></TR><TR><TD CLASS="quote">i'm putting a GT35R on my best friends car...but I can't decide whether or not he should go with the .63 or the .82? I figure since its AWD go with the .63, but then again we all like the top end power...and it IS a 2.5L He's set on the .63, but I think the .82 will be the "better choice" what do you guys think?</TD></TR></TABLE>

with the testing we've done over the last year and a half, the .82 a/r seems to be the better choice on the 2.5L big piston short stroke suby.
we've done ~25 500+ stock head/stock bottom since the first one appeared in Dsport around jan '05.

we've actually tried everything from the GT3076R to the GT4088R(605awhp stock engine) on the STi's
feel free to PM if you have any other questions about these setups

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12-01-2005, 02:26 AM

f1 vtec

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Re: GT35R on a Subaru STi... .63AR or .82AR? Oh the choices (PhoenixTurbo.com)

how good are these scoobys and evos with huge turbos? i was thinking because they have shorter gears also they dont have much rpm to play with, wudnt this mean they have very few rpm of max whp that it is producing? when do these kind of setups hit full boost and reach max whp?

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12-01-2005, 05:08 AM

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rhd

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evo's do fine, subaru's just suck in general anyways

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12-01-2005, 06:14 AM

#11

f1 vtec

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Re: (rhd)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rhd »</TD></TR><TR><TD CLASS="quote">evo's do fine, subaru's just suck in general anyways</TD></TR></TABLE>

why do you say that? is that your personal opinion or is there a reason behind it?

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12-01-2005, 06:15 AM

#12

D@nnY

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Re: (rhd)

I have the .82 and its great

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12-01-2005, 06:23 AM

#13

rhd

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Re: (f1 vtec)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by f1 vtec »</TD></TR><TR><TD CLASS="quote">why do you say that? is that your personal opinion or is there a reason behind it?</TD></TR></TABLE>

i own one, subaru's suck

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12-01-2005, 06:25 AM

#14

wantboost

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Re: (rhd)

rolfmao.... priceless

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12-01-2005, 06:29 AM

#15

stick

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Re: (wantboost)

browse http://www.nasioc.com in the 2.5L forum.

lots of good info and dyno plots for .63 vs .82 choices.

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12-01-2005, 06:52 AM

#16

PeakBoost

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Re: (stick)

also check the "power proven bragging" forum at nasioc.com

search "KingPin GT35R" also

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12-01-2005, 07:02 AM

#17

Bailhatch

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Re: (PhoenixTurbo.com)

at 26-27psi one of our STIs makes 500lb/lbs at 4200 rpm with the .63. Top end does fall off slightly after 6500rpm. makes for a pretty fun street car though. personally I would pick the .82 on this setup.

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12-01-2005, 07:24 AM

#18

rhd

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Re: (PhoenixTurbo.com)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PhoenixTurbo.com »</TD></TR><TR><TD CLASS="quote">also check the "power proven bragging" forum at nasioc.com

search "KingPin GT35R" also</TD></TR></TABLE>

exactly...i mentioned that eariler...

kingpin has about more GT35R expierence on STI's than anyone else i've seen...

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12-01-2005, 09:19 AM

#19

PRELUDE-GT35R

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Re: GT35R on a Subaru STi... .63AR or .82AR? Oh the choices (RTErnie)

Since it is 2.5L you should go with GT4088R

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12-01-2005, 09:27 AM

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Benjithx

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Re: GT35R on a Subaru STi... .63AR or .82AR? Oh the choices (PRELUDE-GT35R)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PRELUDE-GT35R »</TD></TR><TR><TD CLASS="quote">Since it is 2.5L you should go with GT4088R

</TD></TR></TABLE>

Thats what I put on my M3

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12-01-2005, 09:28 AM

#21

Benjithx

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Re: GT35R on a Subaru STi... .63AR or .82AR? Oh the choices (Benjithx)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Benjithx »</TD></TR><TR><TD CLASS="quote">

Thats what I put on my M3

</TD></TR></TABLE>

Sorry that was a wet dream I had last week

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12-01-2005, 09:46 AM

#22

turbo*s2k

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Re: GT35R on a Subaru STi... .63AR or .82AR? Oh the choices (Benjithx)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Benjithx »</TD></TR><TR><TD CLASS="quote">

Sorry that was a wet dream I had last week

</TD></TR></TABLE>

lol!

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12-01-2005, 10:05 AM

#23

rhd

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Re: GT35R on a Subaru STi... .63AR or .82AR? Oh the choices (PRELUDE-GT35R)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PRELUDE-GT35R »</TD></TR><TR><TD CLASS="quote">Since it is 2.5L you should go with GT4088R

</TD></TR></TABLE>

you don't know subaru's...

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12-01-2005, 10:31 AM

#24

.RTErnie

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Re: GT35R on a Subaru STi... .63AR or .82AR? Oh the choices (rhd)

.82 it is. I'm going to get the machined v-band outlet...mmmmm and try to get the ported shroud compressor housing :-D Should be pimptastic.

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12-01-2005, 11:32 AM

#25

Justin Olson

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Re: GT35R on a Subaru STi... .63AR or .82AR? Oh the choices (rhd)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rhd »</TD></TR><TR><TD CLASS="quote">

you don't know subaru's...

</TD></TR></TABLE>

Looks pretty good to me with a gt4088R.

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