This a good 320hp setup?

[corey240]

so my goal is to have atleast 300 hp but up to 320. The mods i have are....

Front Mount,3" Exhaust to N1 muffler,3" downpipe,fuel pump,boost controller,intake.

i think thats about it, so would this get me to that goal as of now?

s15 t28?,atleast 600cc injectors,z32 mafs,some type of tuning,.

would that do atleast 300 safely for daily driving or should i get another size up in turbo? one day i might go for the higher 300's or try for 400 but i just want to surpass 300 and stay low in it like 320.

[AmoebAssassin]

GT28R will only get you to 280whp or so while staying in a good efficiency range, around 16-18lbs. That said, you can go out of its range and make 300whp. Thrwnsprkz made like 300HP and 320lb-ft at the wheels at 20psi or something. Your turbo's longevity will likely suffer though. I'd suggest going with a larger turbo.

You also won't need 600cc/min injectors for 300whp. 550cc/min injectors are fine.

You could probably make 300whp daily @ 16-18lbs if you add some cams to your setup. I suggest a 256/264 or 264/264 setup.

[Spun180]

on the above. I run a T3/T4 and like it. Also running 550s with plenty of fuel to spare. 325hp and 290ft/lb at the wheels. Been running it 2 1/2 years as a daily driver and no problems.

[corey240]

how much was the t3/t4? i was thinking of doing cams also to make the power a little more aggresive. i want reliability in it which is why i figured the 600atleast injectors incase i decide to move on up to 350-400 later on i wont need to worry about injectors. but what would be a decent turbo that could stay in the 300-350 range safely all day long for a whil? i didnt think the t28 would do it, but would hit 300 at a point.

[AmoebAssassin]

If you want a stock turbo, a T28 off of a Nissan Pulsar GTiR will do it. This is what I have. It'll flow enough for 320whp or so, but I was on a budget.

If you have cash, I'd recommend a GT28RS (Disco Potato) if you only want to hit about 330whp. If you want more, get a GT2871R -- these turbos are seriously the cat's *** on SR20s.

[corey240]

thats what i was tihnking of doing. by the way, your in pitsburg? i was at a pirates game a few months ago and a skyline was sitting out front of the stadium, have you ever seen it? was grey i beleive.

[AmoebAssassin]

Yes, I am from Pittsburgh. I don't know of a grey skyline, but I do know of a blue skyline.

[partymonster 975]

320hp on a S15 is kinda tops but on a GT2871R i'd upgrade more.

[AmoebAssassin]

320hp on a S15 is kinda tops but on a GT2871R i'd upgrade more.

An S15 GT28R will be hard pressed to make 320whp and last more than 6 months...

[Deadrodent]

is the gt2871r .64 ar limited to around 400whp?

[karmakaze]

is the gt2871r .64 ar limited to around 400whp?

no. its limited to around 360hp. the guy who made 400hp on the a .64 did not really have a .64 anymore as he had the housing honed.

with some machine work you can get it up there. however on an unmodified gt2871r it is probably not going to happen. either way, your reaching the max top end of this turbo.
Modified by karmakaze at 5:29 AM 1/11/2007

[Deadrodent]

what would be the next step up then? gt30r?

[AmoebAssassin]

.86 A/R GT2871R

[Deadrodent]

i meant a step up above the gt2871r in general....i guess it would have to be the gt3071r? and what would be the difference in spool time? i'm assuming 500-700 rpm...i guess the point is if you want to make a substantial amount of power (atleast above 400hp) you need to wring the sr20's neck to like 8-9000 rpm...

[karmakaze]

i meant a step up above the gt2871r in general....i guess it would have to be the gt3071r? and what would be the difference in spool time? i'm assuming 500-700 rpm...i guess the point is if you want to make a substantial amount of power (atleast above 400hp) you need to wring the sr20's neck to like 8-9000 rpm...

not true, the gt2871r .86 is rated for 440hp.

[Spun180]

The T3/T4 was around 900 bucks almost 4 years ago. Basically the cams were limiting me on the dyno. I can run this all day long and not have any problems. Power comes on hard at 4k.

[Deadrodent]

Quote »not true, the gt2871r .86 is rated for 440hp. [/quote]hmm...well what's the limit on the gt3071r then?

Quote »The T3/T4 was around 900 bucks almost 4 years ago. Basically the cams were limiting me on the dyno. I can run this all day long and not have any problems. Power comes on hard at 4k. [/quote]what size t3/t4? and how much boost? i'm trying to find a fast spooling turbo with a lot of potential...it looks like the gt2871r is my best bet...

[nzmoman]

no. its limited to around 360hp. the guy who made 400hp on the a .64 did not really have a .64 anymore as he had the housing honed.

with some machine work you can get it up there. however on an unmodified gt2871r it is probably not going to happen. either way, your reaching the max top end of this turbo.

Modified by karmakaze at 5:29 AM 1/11/2007

I have seen more than 360 on a .64 housing...I am assuming it was not honed because it was installed out of the box. The car also had 264 cams, Apex'i Power FC, and splitfire ignition. Other than that it only had minor upgrades, exhaust, intercooler, fans, no AC, no PS. but i cant remember but it was definately in the 380-390range...its been a while but I actually think Ive seen this more than once. If I remember correct (I may not) but I think it was 26 or 28 PSi. I cant remember correctly but i know that turbo makes more than 360

[Deadrodent]

26-28psi?........

[Newtype]

GT30R are a 3500+ rpm turbo good for max hp but not much of a daily driver turbo. If you have the money think about a hks GT2835 my friend made 360 torque and 344hp with the supporting mods and front mount on the stock turbo manifold .. HKS turbos are a little spendy but worth the money in the long run. There turbines are long lasted and engineered and tested well.. another friend of mine is running the hks 2537 i think it is which ever is the external wastegated one, with supporting mods and a greddy knock off plenum he keeps right along side of a t25 SR with the T25 at 17pounds and his at stock 7 psi.. Do some research..

[Spun180]

Turbonetics Stage III T3 .63 A/R. T04B compressor section. 20psi.

[karmakaze]

I have seen more than 360 on a .64 housing...I am assuming it was not honed because it was installed out of the box. The car also had 264 cams, Apex'i Power FC, and splitfire ignition. Other than that it only had minor upgrades, exhaust, intercooler, fans, no AC, no PS. but i cant remember but it was definately in the 380-390range...its been a while but I actually think Ive seen this more than once. If I remember correct (I may not) but I think it was 26 or 28 PSi. I cant remember correctly but i know that turbo makes more than 360

26-28psi is well above the efficiency range of the gt2871r .86 or .64and the turbo is rated @ 360 for a reason. yes you can possibly get a little bit more out of it, but it will not do it safely.

[nzmoman]

To verify my numbers the car made 378 whp at 26 PSI. I dont own the dyno sheet, the turbo is a BB37 was ordered used/new from someone in virgina who had never installed it, it wasnt a 2871, but is supposed to be the same thing I guess I just remember hearing 2871 in our conversation. Oh well