What kinda power??built motor boosted

[younghatchowner]

im thinking about buying this guys built hrt motor its got wiseco pistons,eagle rods 3 angle valve job..everything completely rebuilt...t25 turbo..big fmic..z32 maf..3 in downpipe,straightpipe,,emance tuned for t25,z32 maf,370cc injectors

i'd like to make 300hp..and i dont want to boost more than 12lbs..does anyone know how much power i should be putting down

[lazysk8er2]

why build a motor and run stock boost?

get a 3076r, a real tune, bigger injectors and have some fun

[younghatchowner]

thanks but i really want to have this motor last me a while back and forth to work..and then i want to drift ..2-3 times a month at the track and other places..but do u no where my power will be at

[lazysk8er2]

yea like 200-240hp...just google it

[younghatchowner]

are you serious..even on 12 lbs

[HPballer76]

yes he is.

[Corbic]

thanks but i really want to have this motor last me a while back and forth to work..and then i want to drift ..2-3 times a month at the track and other places..but do u no where my power will be at

Yeah, that's called "stock motor". So worried about it, buy a LS1.

[Corbic]

yes he is.


An that is being generous. Even a T28 would have difficulty coming close to 300hp.

[younghatchowner]

well if it really isnt gonna have that much power ill just go back to my original rb 25 plans..damn..thats a bummer

[Sileighty_85]

An that is being generous. Even a T28 would have difficulty coming close to 300hp.

Nah it can be done, I have/had the same set up. Built SR T28 Stock electronics and i made 264? at like .8 bar I think it was

I got a thread somewhere with the dyno sheet and info

now i gots a 2871R pushin 21psi

[shiftdrift]

so you're gonna run a built rb with a stock turbo too? lol.

[Corbic]

Nah it can be done, I have/had the same set up. Built SR T28 Stock electronics and i made 264? at like .8 bar I think it was

I got a thread somewhere with the dyno sheet and info

now i gots a 2871R pushin 21psi

To clarify, I was talking about wheel horsepower, and I was assuming the OP was talking about WHP as well.

264 is a long way off from 300 in my book, good numbers none the less though.

[Corbic]

well if it really isnt gonna have that much power ill just go back to my original rb 25 plans..damn..thats a bummer

Do you have any understanding of how a turbo engine even works?

FMIC, Injectors, rods, intakes, MAF, clutchs, all that crap... none of that "actually makes power". What it does do is basically allows you to run more boost/compression.

The more air/fuel you can shove into the engine, the more powerful the "explosion" is inside it, the more force pushing down the piston... thus turning the crank that turns the wheels...


So when you have a MAF that give a ECU more resolution, rods that can handle more "pressure", pistons that "lower your compression so you can add more forced compression" and injectors that flow more fuel... only to run stock boost... is does nothing. As you have bottle necked the whole process.

Its like saying your sex life sucks because you don't have enough sex with your girlfriend. So you dump her and are now dating an hotter girl... but now you are not having any sex... and yet you wonder why your sex life still sucks even though your new GF is hotter.

[lexlaxlux]

Its like saying your sex life sucks because you don't have enough sex with your girlfriend. So you dump her and are now dating an hotter girl... but now you are not having any sex... and yet you wonder why your sex life still sucks even though your new GF is hotter.


Amen dude you said it

[Sileighty_85]

To clarify, I was talking about wheel horsepower, and I was assuming the OP was talking about WHP as well.

264 is a long way off from 300 in my book, good numbers none the less though.

That was WHP, but seeing that you can supposedly run the T28 to about 16psi and with a tune im sure I could have squeezed out another 40hp from that turbo especially with a tune

Keep in mind I was running the stock ECU, MAFS, Stock SR Fuel pump/pressure no SAFC crap.

[Corbic]

That was WHP, but seeing that you can supposedly run the T28 to about 16psi and with a tune im sure I could have squeezed out another 40hp from that turbo especially with a tune

Keep in mind I was running the stock ECU, MAFS, Stock SR Fuel pump/pressure no SAFC crap.

I know you met 264 = whp, I figure you where trying to say you hit "300hp" with a T-28, 300 crank can be ~ 270whp.

As for the max 16PSI... I'm tired of hearing that. A GT28R (which I believe is what the S15 T28 everyone wants and uses is) moves 500cfms while the WRX has a TD04-13T (not a damn G!!) and is rated to move 400cfm.

Now a friend was rocking meth-injection running 23psi and was putting close to 300awhp down in his WRX last summer.

So yeah, I'm arguing a T28 should hit 300whp, but I'm also arguing the "ZOMFG IT MAXES AT 14PSI" is non-sense started back eons ago and now everyone just quotes it because it's in the FAQ/Sticky.


http://i49.photobucket.com/albums/f265/watto_65/WRX/Turbo%20Selection/EJ25CFMTD04H-13T.jpg

http://not2fast.com/turbo/maps/gt28rcompress.gif

[Sileighty_85]

I started hearing that back in Okinawa even from the locals and shops, and have heard some ppl say 18psi (which I believe to way too much)

Notice I said "supposedly" Me personally I tell ppl to run 14ish and If i were to have kept the T28 would have boosted no more than 14 (thats just me)

But if I were to have tested it again with proper tuning at 16 psi then i would have, like I did with the T28 on Stock Electronics.
The whole reasoning for running stock electronics was for informational purposes

I know ppl that run 16psi on the T28's for years without problems turbo still in great condition.

Yeah it probably blows hot air after 14..blah blah...., just saying though

[cotbu]

I like the 18psi theory. My used gt28r held 18psi to redline just fine, no detonation, huffing or surge. The only problem..., there were no gains in torque after 17psi with that particular tune and stock cams. After cam upgrade, 336hp and 315tq was reached. That's why I like the 18psi theory, I picked up about 18hp @18psi from 17psi. 11psi to 17psi averaged about +9.4hp. I don't recommend that people push there turbos either, but someone has too! This Was the result of my test. Upgrades works, money well spent. I DD @ 1.1bar 300hp range, loved it!

[S13 curtis]

I like the 18psi theory. My used gt28r held 18psi to redline just fine, no detonation, huffing or surge. The only problem..., there were no gains in torque after 17psi with that particular tune and stock cams. After cam upgrade, 336hp and 315tq was reached. That's why I like the 18psi theory, I picked up about 18hp @18psi from 17psi. 11psi to 17psi averaged about +9.4hp. I don't recommend that people push there turbos either, but someone has too! This Was the result of my test. Upgrades works, money well spent. I DD @ 1.1bar 300hp range, loved it!

Same here man i felt a difference going from 14 psi to 19.5psi on the S15 T28 i was also running on E-85 and to me it was a huge difference. what cams did you switch to?

[younghatchowner]

Do you have any understanding of how a turbo engine even works?

FMIC, Injectors, rods, intakes, MAF, clutchs, all that crap... none of that "actually makes power". What it does do is basically allows you to run more boost/compression.

The more air/fuel you can shove into the engine, the more powerful the "explosion" is inside it, the more force pushing down the piston... thus turning the crank that turns the wheels...


So when you have a MAF that give a ECU more resolution, rods that can handle more "pressure", pistons that "lower your compression so you can add more forced compression" and injectors that flow more fuel... only to run stock boost... is does nothing. As you have bottle necked the whole process.

Its like saying your sex life sucks because you don't have enough sex with your girlfriend. So you dump her and are now dating an hotter girl... but now you are not having any sex... and yet you wonder why your sex life still sucks even though your new GF is hotter.

yeah u are completely right..im a newb i still kinda have to understand this kinda stuff.

[slideslidegnarslide]

if its that built throw injectors in and a bigger turbo youll be fine it will be reliable

[cotbu]

Same here man i felt a difference going from 14 psi to 19.5psi on the S15 T28 i was also running on E-85 and to me it was a huge difference. what cams did you switch to?

Greddy Easy Cams, 256,264, I believe they are 10.5. Didn't want to sacrifice the low end torque. I think I might source a 264in for my current 2871r setup.
IDK.