4agte turbo options.

[cotts13]

hey Guys,
Been doing a bit of research and trying to work out what turbo is best for a 4agte setup. Running a stock gze ecu with (front mount and exhaust). Currently have a t-03 or what i thought was, but all i know is it was off a series 5 rx7 seems laggy. Looking for a fairly responsive type setup good for little bit of slidding but mainly just street and some good fun.
Whats been done/run and works well or what do you boys reccomend?
cheers
cotts

[reecegze]

t28 turbo is best suited.. full boost by 3700rpm hold 16psi to redline.. Imo t2 flange the way to go.. Weld shut the internal gate and run external

[FAST EDDIE]

t28 non ball bearing of aussie s15 and all s14s. so much more responsive than a t28bb version and yeas i hvae done a straight swap comparison on my car!!!

[Nic19]

whats the lag difference between a t28 and t25g?

[reecegze]

They feel both the same.. But the t28 comes on harder.. t28bb turbo is faster spooling but you dont feel the torque as much as when a bush t28 comes on so its hides from you.. I would recommend a gt28rs for big power stock block. But for fun response gt28r from s14 , s15 bush bearing


whats the lag difference between a t28 and t25g?

[Nic19]

what about the kkr280 and 330? they would be easy to set-up.

[fantapants]

easy to setup? y any easier than any other turbo???

[3s-86]

Go T28 roller bearing
you won't look back mate!

[Nic19]

because they dont need water lines ran to them.
how much power could i expect out of a smallport with a t25g or t28 on it?

[PuGZoR]

Nic19, I've owned a KKR330 before and it had water cooling. It's marketed as a direct replacement for the T25, and thus uses the same lines.

HKS GT2510 is apparently a brilliant turbo for the 4A. It has almost identical sized turbine and compressor profiles as the T28 Ball Bearing, but obviously with improved fin design, etc for faster spooling and a little more top end power. If you want a cheaper option, but something brand new, the Garrett GT2560R is the "aftermarket" version of the T28BB. Can be had for around $1000.

If you want something that gives out more power but at the cost of having to rev higher, maybe a Disco Potato might be the go? Would also be suitable if you have cams + headwork.

EDIT: Ball bearing is a nice feature, but not necessary IMHO. Internal wastegates are a blessing too. I didn't do them on my build, but I kind of wish I had in retrospect. Very similar performance for less dosh.

[FAST EDDIE]

my kkr280 200kms in the scrap steel pile, impellor was hitting housing= fail!!! made 170kw on 16psi though and screamed.

although ive seen a 330 on a track 4agte setup making 16psi and using oil only not water cooling last for 2 years and its still going!!!!

[reecegze]

there still crap regardless its the luck of the draw

[Sprinter86]

Anyone had any experience with this turbo?

GT2854R
http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT28/GT2854R_471171_9.htm

I have one im about to run on my silvertop, but really i have no idea whether its a good size for my 4age...i hope it doesnt run out of puff!

any thoughts?

[reecegze]

Thats an ok turbo for a low compression 4agte but your better of going with a bigger flowing front wheel and smaller rear a/r .49.. perfect for 200kw but full boost of 2500-3000 to redline of 8000ish. I could show you my specs after i run it in
If your running standard c/r on a silvertop it will spool so faster it will feel like a supercharger, and most probly your motor will run out of puff

[Sprinter86]

hmmm i kinda figured that would be the case, ahh well, i can always upgrade. just so you know it has a comp of about 9.6ish to one. so i doubt lag will be much of an issue lol