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View Full Version : A/R choice for gt2860rs

sodel_s13
05-06-2012, 09:55 AM
Hi, I have a 91' ka24de-t. Port and polish on the head, stock cams, eagle rods, 9.0:1 cp pistons, arp hardware where it matters etc.

What a/r size i should choose when looking at the garrett "disco potato" turbo? Im now looking at 0.86 a/r or 0.64 a/r.

Car is used for drifting. Im thinking the 0.86 because its a 2.4l vs the sr 2.0l. I had a s15 type r sr turbo on before, not my favorite since it was designed to cope with the smaller displacement engine.

Thoughts?
Frank_Jaeger
05-06-2012, 11:14 AM
Out of curiosity what're your horsepower goals?
Pinggg
05-06-2012, 01:50 PM
0.64

Since your looking to make power earlier in the rpm range.
sodel_s13
05-06-2012, 02:24 PM
0.64

Since your looking to make power earlier in the rpm range.

over 300. Would the smaller a/r limit me at the top end?
Pinggg
05-06-2012, 05:39 PM
over 300. Would the smaller a/r limit me at the top end?

Ka's don't have topend anyways lol. You'll be happy with the smaller housing.
hobbs
05-06-2012, 06:57 PM
Go with the .86 housing, you really won't notice the faster spool over the .64 and you will choke out the disco at higher revs with the .64.
codyace
05-10-2012, 11:30 PM
.86 housing for sure on teh 28RS :D True DiscoPotato spec!
fliprayzin240sx
05-11-2012, 07:27 AM
If you hated the S15 turbo, why go with a smaller AR 2860R? If I were you, I'd go 2871R. If its good for the SR, itll even be better for the KA-T.
codyace
05-11-2012, 10:03 AM
If you hated the S15 turbo, why go with a smaller AR 2860R? If I were you, I'd go 2871R. If its good for the SR, itll even be better for the KA-T.

Totally agreed...I missed that part altogether somehow

2871r (and truthfully a 28RS wouldn't be a bad choice though) would rock on a 2.4.
fliprayzin240sx
05-13-2012, 11:23 PM
Question now is, with the bigger displacement and more exhaust flow...would a .86 be better suited on a KA over the .64? Figured a .86 would probably be fully spooled on a KA before 4k, compared to about 4.2k on an SR.
omgwtf
05-15-2012, 10:13 PM
FWIW on my CA18det i run a.64 and its super responsive but then again you have a bigger motor. i would probably have to agree with the 2871r. i was gonna go that route but decided against it since i mainly drive the car on the street for fun.
cotbu
05-16-2012, 07:57 AM
Trying to give him the best of both world's, I suggested the 2871.64. I've tuned both 86 & 64 on ka's and that's why. He's gonna make his goal, and he'll be able to out drift his buddies, with sr's..; )

Posted using a Highly Tuned Vibrant!!! Running Jelly Bean!!!
codyace
05-16-2012, 09:24 PM
Trying to give him the best of both world's, I suggested the 2871.64. I've tuned both 86 & 64 on ka's and that's why. He's gonna make his goal, and he'll be able to out drift his buddies, with sr's..; )

Posted using a Highly Tuned Vibrant!!! Running Jelly Bean!!!

'hater'


:P Just teasing ya, I hate that word.


If I had to redo an Altima, and returbo it (yes I did own a turbo Altima almost ten years ago), I'd love to do a 28RS or a 2871r on it:D