this is not an opinion thread or a flame or why I should do it its a how. Im buying a cheap ebay motor to build. My questions are what turbo would work good? gt35R? how many lbs could I push or should I. Im gonna run eagle H beams Wiseco pistons, good metal headgasket of course. what other things should I do to have it handle power? what cams are good? how big of valves can I go to? what fmic is best for a lot of power. can the stock 5 speed handle it. I really want to do a 6 speed but I heard they are not strong. what can I do to make it handle the power? what injectors should I go to? should I do a full stand alone? what intake manifold and header is best? should I do top mount turbo. 3 inch downpipe or bigger? what major things will i run into
450 HP........how?
TiNyT
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this is not an opinion thread or a flame or why I should do it its a how. Im buying a cheap ebay motor to build. My questions are what turbo would work good? gt35R? how many lbs could I push or should I. Im gonna run eagle H beams Wiseco pistons, good metal headgasket of course. what other things should I do to have it handle power? what cams are good? how big of valves can I go to? what fmic is best for a lot of power. can the stock 5 speed handle it. I really want to do a 6 speed but I heard they are not strong. what can I do to make it handle the power? what injectors should I go to? should I do a full stand alone? what intake manifold and header is best? should I do top mount turbo. 3 inch downpipe or bigger? what major things will i run into
Well I was told from somebody who knows their shit, that the sr block can take 500 ponys on stock internals, by which i mean pistons, rods, valves, shit like that. Of course you still have to upgrade injectors, and if your planning on running 450 to the wheels, you should probably get around 600cc injectors.
You can also probably get some cheap ass ebay intercooler piping and core, which will save you lots of money though you will have to do alot of cutting and work to make it fit, but basically everything is there. I would also suggest getting T-bolt clamps as they grip alot better then regular ones. And also on alot of ebay intercooler piping kits, the pipes don't have that little bump at the end of the pipe, thats how cupplers can come off if your running alot of boost, and crappy clamps. Plus you would also need to make a fitting in the hot pipe, so that you have air going to your throttle body, otherwise there goes your idle. (since ebay pipes dont have the fitting already on there)
For that i went to pepboys, bought a fitting, drillid a hole in the pipe and screwed it in there with loctite.
Then again you can always buy greddy intercooler which will fit perfect, no need to cut or anything, basically a plug and play type of thing.
There are still many things you need to get i just dont feel like listing them all.
P.s dont expect the 6 speed to be cheap, and of course you would need the s15tranny if you get the s15 motor.
You can also probably get some cheap ass ebay intercooler piping and core, which will save you lots of money though you will have to do alot of cutting and work to make it fit, but basically everything is there. I would also suggest getting T-bolt clamps as they grip alot better then regular ones. And also on alot of ebay intercooler piping kits, the pipes don't have that little bump at the end of the pipe, thats how cupplers can come off if your running alot of boost, and crappy clamps. Plus you would also need to make a fitting in the hot pipe, so that you have air going to your throttle body, otherwise there goes your idle. (since ebay pipes dont have the fitting already on there)
For that i went to pepboys, bought a fitting, drillid a hole in the pipe and screwed it in there with loctite.
Then again you can always buy greddy intercooler which will fit perfect, no need to cut or anything, basically a plug and play type of thing.
There are still many things you need to get i just dont feel like listing them all.
P.s dont expect the 6 speed to be cheap, and of course you would need the s15tranny if you get the s15 motor.
Yea it'll hold 500 but only for a handful of passes/hard runs. I'd say 400-425 is the stock reliable cutoff on the internals. And the reason why the s15 6 speed doesn't handle power well is because it's basically the sr20 5 spd with a 6th gear shoved in there. Stick with 5 speed you'll never even get to 6th when racing and if you want a high gear to get better gas mileage then have the 5 speed gears reworked so 1-4=short and 5th is something crazy long
i bought a longblock off of ebay and built it aswell.
redtop
weisco pistons 87mm 9.0cr pistons
eagle rods
oem bearings
balanced crankshaft and rotating assembly
arp main studs
arp head studs
87.5mm cometic head gasket
slight port and polish
jwt s3 cams
as far as internals that should hold alot of hp. Im running the gt2871r .64 turbo and I am making 400hp @16psi on this setup(with pump gas). I have a datalogged run in 5th gear with 18psi@3200rpm. If I were to push it up to 18 or 19psi im sure I would make around 450hp.
redtop
weisco pistons 87mm 9.0cr pistons
eagle rods
oem bearings
balanced crankshaft and rotating assembly
arp main studs
arp head studs
87.5mm cometic head gasket
slight port and polish
jwt s3 cams
as far as internals that should hold alot of hp. Im running the gt2871r .64 turbo and I am making 400hp @16psi on this setup(with pump gas). I have a datalogged run in 5th gear with 18psi@3200rpm. If I were to push it up to 18 or 19psi im sure I would make around 450hp.
Under lighter load situations it spools very fast. I dont really know how to explain it but the throttle response is awesome. I might have gotten lucky with my turbo or something. On my dyno @ 16psi it is at about 300tq from about 4000 to redline with maybee a 10tq drop at redline. At 18psi Im sure it will be around 315-320tq. This makes for a very quick car and a very nice smooth powerband.
Hp numbers can be misleading sometimes. Mine is so high because the tq doesnt drop off. 400hp@7500rpm... 302tq@4200rpm.....
Hp numbers can be misleading sometimes. Mine is so high because the tq doesnt drop off. 400hp@7500rpm... 302tq@4200rpm.....
please dont start with the disco potato. GT30R or 35R would be awesome turbos to get to 450whp. GT30R can do it around 19-20psi and get to 500whp at 24psi or more boost with very good spool (17-19psi before 4500rpm). GT35R makes even more power at the same boost so its a win win with both turbos for the power. Cams i would go something of a 272 duration with a 11.5mm or larger lift on both intake and exhaust. Youll want the high duration and lift for peak horsepower. Upgrade valve springs too so you can rev to 8000+rpm safely and handle the cams. 740cc or 850cc injectors are a must. 600cc max around 400whp so there a big no. Id go at least Top Speed Intake Manifold or Greddy if you want to spend the cash. 3" exhaust should be fine but 3.5" would leave no worrying about exhaust size if you want more than 500whp. Ive heard 3" exhaust becomes a little restrictive when reaching over 500whp. Beware of boost creep from a Top Mount Manifold. They have been known to flow so good that exhaust bypasses the wastegate and goes to the turbo causing boost creep at high rpm. Only fix ive seen is dual wastegates for that. I dont think its a big deal though. Just watch the boost carefully.
good to know dopleganger. for 740 or 850 cc injectors should i go standalone fuel system or just have the car tuned and tune those injectors in? and should I upgrade other stuff fuel wise...I will do a new rail but what other things should I do if i dont need to go standalone. and would you reccommend a top mount or no.. I am going to go with the gt35r and the one I was looking at was a 4 inch outlet...would that be ok backpressure wise to run a 4 inch downpipe all the way back? which wastegate would be best? 40mm tial? which electronic boost controller and turbo timer would you go with? can the stock turbo handle all that power? and what do you think my 1/4 mile time would be with 500 horse, 1.5 way lsd, and slicks?
11's with a bad driver and 10's with a good driver. Id go Standalone but im the kind of person who likes to tune everything myself. Enthalpy can probably supply a great tune too. You definitly need to go Top Mount for the GT35R. 4" downpipe would be fine. 38mm or 40mm both are fine for the turbo. Boost controller is up to you. Many like manual ones and others like electronic. I like any simple electronic controllers like the Greddy Profec Type S or HKS EVC EZ. Turbo Timer, Greddy has a good one. Alot of settings and shows speed and can record track times.
Transmission wise, i would go VG30 trans swap from Mazworx. None of the SR trans can hold the power of 500whp for very long, exspecially on drag radials or slicks. OS Giken makes new gears for the SR but they cost over $1000. I guess theres always cryotreating the 6 speed for added strength. I dont know much about that though.
Transmission wise, i would go VG30 trans swap from Mazworx. None of the SR trans can hold the power of 500whp for very long, exspecially on drag radials or slicks. OS Giken makes new gears for the SR but they cost over $1000. I guess theres always cryotreating the 6 speed for added strength. I dont know much about that though.
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71 Posts
our top mount kit with a GT30R, .82 A/R exhaust housing, metal headgasket, headstuds, solid lifter conversion with step 3 cams and supertech springs, topspeed or greddy intake manifold, 1000cc injectors, AEM EMS or power fc d-jetro, and your other basic essentials (FMIC, fuel pump, clutch, etc).
this would net you a very solid 450hp build at relatively low boost(24 PSI range) with a good person tuning your car. with good fuel and more boost, it would be capable of 550 and the turbo would be maxing out. if you're one of those people worried about cracking a piston, then throw some CP's in it. we've hit 665 on stock pistons and rods, so i know they can handle them. where we ran into trouble with our stock block motor was with the valvetrain. thats why i highly recommend spending the money and building the head more than i recommend building the block.
this would net you a very solid 450hp build at relatively low boost(24 PSI range) with a good person tuning your car. with good fuel and more boost, it would be capable of 550 and the turbo would be maxing out. if you're one of those people worried about cracking a piston, then throw some CP's in it. we've hit 665 on stock pistons and rods, so i know they can handle them. where we ran into trouble with our stock block motor was with the valvetrain. thats why i highly recommend spending the money and building the head more than i recommend building the block.
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2,191 Posts
Since were on the hp track. Whats the max hp i can make on a s13sr with gt2871r 64.ar with topseed intake manifold, megan exhaust mani. new sr valves, bc springs and retainers, headgasket, studs, hks 256's,ras, 720cc, and microtech????? I have all of this stuff but i am waiting till winter to put it on. I thought at max i would see 350whp, but the guy who posted earlier said he hit 400hp.
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414 Posts
S15 internals have been proven to 570 P/S and that's being beaten.. If you want 450 reliable horsepower you're gonna need some bigass cams, the head work involved with that, a nice port and polish, bigger oil pan, oil cooler, RB25 or Z32 tranny, some kind of engine management weither it be Power FC or SDS or something, a surgetank, 850cc+ injetcors, fuel pump, blah blah blah...
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414 Posts
Oh and you might want one of these
![Image]()
Td06 25G
Td06 25G
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2,191 Posts
Yeah, i have one from my other sr. You think i should switch to a bigger cam. The car is setup just for drifting so i can't run to big.
And does anyone know of a company that does headwork. There is no one in my area that i trust.
And does anyone know of a company that does headwork. There is no one in my area that i trust.
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