which is better...???

[ekamakk4agze]

what turbo will best fit a 4agze T25 or a T28...??

[micro214_kp61]

T28

[punter]

Both will do fine, T28 would be my pick.

Normally you first chose your goals (HP, RPM) then you choose an appropriate size turbo.

[ManoNegra]

Spec V T28 from a Nissan S-15. Good for ~300hp with supporting mods. Pics of your manifold please.

[ekamakk4agze]

aww ok.. i read in phils bradshaw website that a ct26 will also do..? from a 3sgte right..? what will be the diff. between the ct26 from the t25 or t28..? i have a manifold of a 4age N/A....

[punter]

CT26 is smaller, and will make less power. Depends what you're after.

A CT26 would be a good match for a stock 4agze as the injectors will run out about the same time as the turbo (about 150kw)

[ekamakk4agze]

i m wondering on what HP will i reach if i put a gt28 turbo on my stock 4agze.... and what must i modify to reach 200hp on a turbo..?? what parts do i still need to reach that HP... tnx...

[punter]

for 200hp, wouldn't need anything else, run standard GZE ECU.

[ekamakk4agze]

i just have to put a gt28?? i dont need to change the cams, cam gears.. etc....??

[punter]

Stock internals are good for 200kw, and about 18~20psi.

But stock GZE ECU is only mapped to 14~15psi so you have to keep it around there.

So yea, just sortout an exhaust + manifold,
intercooler and piping,
and the intake + intake manifold will need to be changed.

Keep the boost under 15psi and it will go great. Would probably only need 11~12 for 200hp.

[ekamakk4agze]

ahh ok.. thats with a gt28 right.. will the stock turbo from a rb20 work as well?? and what rpm do you thing it will start to spooll and and achieve full boost??

[punter]

Not sure on an RB20 turbo, that's a T3 right?

The exhaust side of that turbo is often used on hybrids for 4agte's so I guess that means the compressor is smallish.

Still if you're only after 200hp I sure you'd get it.

[ekamakk4agze]

which would you get a ct26 or t3 from a rb20? my dream HP is 200-250HP..

[toyotaspeed90]

a t28 from a dsm on a properly tuned megasquirt showed a little higher than 230whp and 220wtq in an mr2..... and the powerband was NOT peaky at all....

a ct26 is a bigger turbo than a t28..... and the spool time will be longer.... which relates to slower lower rpm's and peaky higher rpm's.....

i believe this run was BEFORE he had the power he does now.... numbers were considerably lower

http://www.supermotors.net/vehicles/...y/media/136411

[ekamakk4agze]

woww... that was a 4agte? what turbo did he use??