Aiming for 240-250whp

[nissanrcer240]

I think its possible with this set up, this is what I got

s13 sr203" Downpipe and test pipe3" RSR Exmag catback exhaustAutometer boost and oil pess. guagesApexi intake300zx TT fuel filterWalbro 255lt fuel pumpHKS rasTurbo XS boost controllers15 Spec R smic

I plan on boosting at 14 psi at the track, does around 240whp sound about right?

[mynismo]

not sure you can do it with the smic. i thought about doing the same thing then just gave in to getting a fmic.

not sure though, it MIGHT be possible...

[Onizuka]

240hp is getting towards the limit of your fuel system, but its entirely posible, i have seen several people lay down 250 with the stock T25

[mynismo]

we're talking about laying down 240whp with the stock smic. people lay numbers down like that all the time with fmic, but i've never seen a smic do that.

[nismostate]

I always thought a stock sr w/ smic have about 200 at the wheel. By adding a fmic i expected about 20 hp gain. im not 100% sure though. 14 psi might be too much on the stock smic too. the most you get out of the t25 is about 15 psi.

[Def]

If you're just drag racing you should be able to do 14psi on the stock T25. I'd be very cautious about using that much boost for prolonged periods of time on any type of SMIC, as they're prone to heatsoak and don't have excellent efficiency to start off with.

Don't place so much emphasis on dyno numbers either, as real world conditions are MUCH different for FI vehicles with wind speed, increased loading and drag all making changes to the powerband and power level produced.

[f150intally]

check out my signature. the mods on that list led my car to 244whp on 1 BAR of boost. This is the setup you need. Just look at the performance related mods.

[NoStickers]

I made 250hp with 3" pd, 3" test pipe, apex gt spec exhaust, greddy rspl and 15psi.

[unfrgivn]

Are you people being serious? You cannot not boost 14psi on the stock SMIC, so why are people saying it might be possible. It ain't gonna happen.

230-240whp is commonly what most people run when they do an sr swap. Basic swap componenets, plus clutch, exhaust, fmic, and boost controller.

[unfrgivn]

Oh didn't see S15 SMIC... I have no idea how much boost that can support, but if you can run 14psi, then it will be fine. I would go with a FMIC though, because you will eventually want more power and require one.

[Def]

It's just a question of heatsoak really. I think even a stock SMIC could do 14psi assuming a high road speed, short pull and fairly low ambient temperatures.

You do realize that the stock intercooler will most likely cool better with 40*F ambient air then a FMIC with 90*F ambient air? Also, a SMIC will provide more cooling(efficiency, same thing) at 70mph than a FMIC will at 10mph.

I don't really know what you're basing your claim that a SMIC couldn't do 14psi from a T25. It's all a question of quantities and looking at the big Heat Transfer picture.

[unfrgivn]

Yes with low ambient temp and assuming the SMIC was getting enough air, I guess it could MAYBE run 14psi for a short pull down a track, but more than likely it would be unable to cool the charge after a few seconds. The ambient temp would have to be crazy low for the intercooler to be able to still efectively transfer heat from the air charge off the fins and into the ambient air.

And yes a SMIC would be more efficient if it was "supercooled" vs a FMIC at idle, due to the bulbous area of the FMIC and the larger pressure drop it creates. However this is not the case in real life. We are compairng a SMIC and a FMIC both at 90*F.

I am simply stating that you will not be able to run 14psi on a stock SMIC for long enough to even think about rubbing one out. If you want to run over 10psi you will need something larger and more efficient than the stock SMIC.

[mynismo]

so you think the 240 can put out 240-250whp with the s15 smic?

[unfrgivn]

I have yet to see 250whp on a stock T25 regardless of the intercooler, even with cams and tubular manifold. 240whp is really the upper limit of what you can do without a turbo upgrade.

Of course this is one thing I would actually like to be proven wrong over.

[nissanrcer240]

so you think the 240 can put out 240-250whp with the s15 smic?

I think its possible, the smic is temporary. Im getting a fmic but I just started a new job and it will be a while before Ill be able to get it. I plan on doing a turbo upgrade and thats when I was going to put the fmic on, but thats going to be a while so I figured for now the s15 intercooler should be sufficient, with the stock turbo anyways. Anyone here actually running the s15 smic?

I was talking about drag racing btw, I was only planning on pushing 14psi while I was actually racing, not daily driving on it. I also forgot to mention in my mods list the greddy type s bov.

Im looking to run low 8's in the 1/8 mile. I ran 9.0 with just intake and 3" exhaust on stock boost with an open differential

[f150intally]

low 8s are not very easy. you will need extreme traction to do this. but if you dyno 240-250 you will be able to do it if you are an excellent driver. my car has ran many 8.3s and one 8.0.

[NoStickers]

I have yet to see 250whp on a stock T25 regardless of the intercooler, even with cams and tubular manifold. 240whp is really the upper limit of what you can do without a turbo upgrade.

Of course this is one thing I would actually like to be proven wrong over.

http://www.geocities.com/siriswrathraven/

[f150intally]

I have yet to see 250whp on a stock T25 regardless of the intercooler, even with cams and tubular manifold. 240whp is really the upper limit of what you can do without a turbo upgrade.

Of course this is one thing I would actually like to be proven wrong over.

I made 244 with the cast manifold. it can be done. John from Secret Services made more than 250 on the stock t25.

[NoStickers]

Literally all I have done is exhaust, intake (made of pvc), fmic, fuel pump and boost controller.

[nissanrcer240]

Those are some pretty impressive numbers with the mods you have

[Def]

Quote »The ambient temp would have to be crazy low for the intercooler to be able to still efectively transfer heat from the air charge off the fins and into the ambient air. [/quote]What are you talking about? As the intercooler gets hotter(heatsoaked), it will transfer more heat into the air stream. Our stock SMIC aren't horribly inefficient. I wouldn't run 14psi for longer than a dragrace, but in something like that it would keep charge temps in check. An S15 SMIC is a bit larger, so it has more mass to heatsoak, which is mostly how the intercooler "cools" during a short relatively low speed pull like dragracing.

This is basic Heat Transfer. A FMIC is a better cooler yes, but it's not like the SMIC is the size of a matchbox and has horrible construction... The difference between the SMIC in the probably 50-70% efficiency range and a FMIC in the 80-90% efficiency range isn't that huge at the heat loads we're talking about.

BTW - most FMICs have less pressure drop due to restriction than the SMIC due to more efficient core construction.

[hadokenny]

You need to invest some money on tuning if you want reliable 240-250rwhp

[bootman]

I wish I could get 240 to the wheels I put down 215@10psi does that sound a bout right or sould I be putting down more?

[nissanrcer240]

Whats your mods?

[unfrgivn]

Literally all I have done is exhaust, intake (made of pvc), fmic, fuel pump and boost controller.

Those are REAL nice numbers, congrats!

I know it's possible, but 240whp is usually the average ceiling people hit without going to a bigger turbo is kind of what I was implying. Yes you can squeeze out another 5-10hp, but you're still in the same ballpark. And of course Scott has done it, the man is a tuning genious! I think he could add an extra 5whp to my 1989 Schwin bicycle. Anyways running 250whp on a stock T25 is very impressive.

[unfrgivn]

What are you talking about? As the intercooler gets hotter(heatsoaked), it will transfer more heat into the air stream. Our stock SMIC aren't horribly inefficient. I wouldn't run 14psi for longer than a dragrace, but in something like that it would keep charge temps in check. An S15 SMIC is a bit larger, so it has more mass to heatsoak, which is mostly how the intercooler "cools" during a short relatively low speed pull like dragracing.

Well seeing as how neither of us have any proof unless you have a dyno sheet or timeslip of someone running close to 240whp or 14psi on the stock SMIC. It's basically just your speculation versus mine. From everyone I've talked to, the stock SMIC is way too small and horribly inefficient to be able to run a full 1/4 mile at 14psi without becoming completely heat soaked after a few seconds (thereby you would not be running anywhere near 240whp). An S15 intercooler if it's larger might be able to last for a pull down the drag strip, or possibly even the stock SMIC mounted in front of the radiator would be able to last that long, but like I said neither of us have any proof.

[candela]

I have also dyno'd 250whp (exactly) on t25, fmic, 255lph, stock manifold, 3" T-back, electric fans and 15psi falling off to ~12psi...

I run 13psi daily on my S14 t28 now and put 250/250 with the same mods. 250 CAN be done and I have seen it with mine and some locals as well. However running that much out of the T25 not only heats teh charge up a *** load and should require a FMIC if daily driven at that, but it also is definetly out of the T25's safe efficiency range and will shorten the life of the turbo.

[got2b240]

my mods are on my sig, what kind of hp am i putting down rwhp with this stuff? what if it turn up boost to 13? would it be safe to run like this all day?

[unfrgivn]

Yes you can run 13 even 14psi daily. I did so on the stock turbo for a year with no adverse effects. My turbo was in great condition when I pulled it, no shaft play, all the bearings and seals were in good condition, etc...

[GTS4-R]

I wouldnt wanna trust an SMIC above 10psi for prolonged time (at all for me) but thats just me....but im also un familiar with the s15 SMIC.....