shooting for 300-350 whp on stock internal SR20

[89hatchman]

I have a red top SR20DET that I'm hoping to get 300-350 whp out of without having to change up the bottom end and I have a few questions.

First has to do with my turbo. I would really like to keep the stock bottom mount style turbo manifold and use my existing megan elbow, so that leaves me with the T25 or T28 correct? I have heard good things about the ball bearing T28 but its a little out of my budget and perhaps a little more finicky with oil pressure. Not to mention it's difficulty to rebuild.

I'm looking at using Injector Dynamics 1000cc injectors and a circuit sport top mount fuel rail. Does it matter if the opening is 11 or 14? Or will it be a max of 1000cc of flow either way?

Looking at getting a MAP ecu set up since the tuner that everyone in my area suggests, suggests that method of tuning. Megasquirt works well?

Would rocker arm stoppers and ARP head studs be suggested as insurance? I'm taking my head off anyways to do a head gasket anyways. The stock head bolts are torque to yield right?

Any manual boost controllers you would suggest?

Would that be about it? I'm looking at spending around 2 to 2.5k on this whole thing. Doable?

I currently have an ebay front mount intercooler set up and a clutch good for 400 whp

[Dboyizmlg]

OMG......

You are in for a lot of trouble kid!

[e1_griego]

Just go read the 2871 thread.

[MADE]

I have a red top SR20DET that I'm hoping to get 300-350 whp out of without having to change up the bottom end and I have a few questions.


My Friend was pretty much in the same boat as you months ago, so I'll tell you what I recommended, what he tried to do and what he ended doing. IIRC he made 385ps on a dynapak

First has to do with my turbo. I would really like to keep the stock bottom mount style turbo manifold and use my existing megan elbow, so that leaves me with the T25 or T28 correct? I have heard good things about the ball bearing T28 but its a little out of my budget and perhaps a little more finicky with oil pressure. Not to mention it's difficulty to rebuild.

What is your budget? I recommended him the GTX2867 or the GT2871. cheap ebay turbo's work as well but I wouldn't go that route but whatever is in your price range do it.

I'm looking at using Injector Dynamics 1000cc injectors and a circuit sport top mount fuel rail. Does it matter if the opening is 11 or 14? Or will it be a max of 1000cc of flow either way?

I recommended Nismo 740cc or similar , he went with your suggestion with a GSP mani, lots on money wasted as it didn't fit. Hood wouldn't close, other parts wouldn't line up etc. 740cc were used.

Looking at getting a MAP ecu set up since the tuner that everyone in my area suggests, suggests that method of tuning. Megasquirt works well?
No idea about megasquirt but he went with the MAP version of the PFC, If you're limited to tuners I'd get what they suggest or if you have the money get what you want and take the ECU to someone out of the area with the knowledge to tune it.(I say this cause tuning will be the hardest part, if the tuner is crap or isn't comfortable with the standalone your outcome will be less the optimal.

Would rocker arm stoppers and ARP head studs be suggested as insurance? I'm taking my head off anyways to do a head gasket anyways. The stock head bolts are torque to yield right?

I'd stick with a stock gasket, if it's good. He went with the Cometic IIRC and poncams, I'm running a GTX2867R/EWG on stock HG and cams

Any manual boost controllers you would suggest?
I prefer Blitz SBC ID, whatever EBC works for you.

Would that be about it? I'm looking at spending around 2 to 2.5k on this whole thing. Doable?

What Fuel pump do you have?

I currently have an ebay front mount intercooler set up and a clutch good for 400 whp


There is a 100 ways the skin this cat, but I will say talk to the mech/tuner, see what he recommends and do some research to make sure he is not up selling you. Any respectable shop should have a cost effective recommendation for the customers and best way IMO. My personal friend owns a shop in the local area, where he works on circuit cars for race teams, R&D for a major car company and regular enthusiast. He works with all to get them what they need.

[89hatchman]

What Fuel pump do you have?


Walboro 255, got that taken care of. Also looking at running E85 just because it's cheaper, higher octane, and runs cooler than gas.

[fliprayzin240sx]

The more this guy post...the more I smell troll...

[Fuego]

255 fuel pump, 550 injectors, gt28, z32 maf, rom tune.

It's been done 1000 times and yes your budget will suffice.

[Mikester]

^^Ding ding ding!^^

[hartig]

1000cc injectors on a t25 or t28? smart..


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[VegasDrifterS13]

Im surprised there arent too many folks Roasting this thread.

First of All. Go S15 T28, theyre cheap, reliable, and Made to work well with your SR cuz NISSAN DESIGNED IT THAT WAY. THROW IN some 550cc Injectors, get an electronic Boost controller, z32 MAF, & a Nistune on Your ECU. Get her tuned from 14.6psi to 16psi somewhere where shes not knocking and Baaam. Reliable 300-340hp at the ground.

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[di-devol]

^You're thinking of a 2871 for about 340 at 14-16 psi. I don't see even a s15 t28 making that much over 300.

[VegasDrifterS13]

^You're thinking of a 2871 for about 340 at 14-16 psi. I don't see even a s15 t28 making that much over 300.

Mine makes 326hp & 268ftlbs @ 16psi. I have an S15 T28, Sard 550's, z32 maf, Apexi Avcr Boost controller, trust 3" elbow & downpipe, & a Redline Efi Rom tune

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[di-devol]

Mine makes 326hp & 268ftlbs @ 16psi. I have an S15 T28, Sard 550's, z32 maf, Apexi Avcr Boost controller, trust 3" elbow & downpipe, & a Redline Efi Rom tune

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That's my point, not much over 300 :P

[VegasDrifterS13]

That's my point, not much over 300 :P

Lol. Well his goal is right there. 300-350. Im smack dab in the middle. :beer::D

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[ultimateirving]

Yea I put down 298 with e85 t28 And 850s

[kilamax03]

hmm this should be interesting... im looking to make around the same amount as well.. guess im gonna have to start looking into another turbo.. not to troll this doods thread but what is the best turbo to get equal torque and HP?

[Mikester]

hmm this should be interesting... im looking to make around the same amount as well.. guess im gonna have to start looking into another turbo.. not to troll this doods thread but what is the best turbo to get equal torque and HP?

None.

msglngth

[whereda40at]

http://zilvia.net/f/chat/351870-1-4-record-t-2-turbo-stick-car-93-octane.html

Do this....Just don't build the motor, do arp head studs, don't do r a s, do the drive train if you can. Enough said.
380hp 385tq on a mustang dyno...440ish hp on a dyno jet. Looks stock and won't break the bank.

[Fuego]

hmm this should be interesting... im looking to make around the same amount as well.. guess im gonna have to start looking into another turbo.. not to troll this doods thread but what is the best turbo to get equal torque and HP?

All of them. At 5252 rpm

[VegasDrifterS13]

All of them. At 5252 rpm

Lmao^^^

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[Mikester]

All of them. At 5252 rpm

^^HAHAHAHA I love this guy!

(no homo)

[WS93]

255 fuel pump, 550 injectors, gt28, z32 maf, rom tune.

It's been done 1000 times and yes your budget will suffice.

Pretty much sums it up.

[Danger_Dorn]

I'm kind of going to thread jack here... I have a few things like 444cc injectors from a gtir, a holset 351, and rb25 maf. I have a (noob mistake) 1.8mm cosworth headgasket, fmic, healthy rebuilt motor with 6k miles on it. I want 300 whp or something around there? What are my options? I'm trying to keep expenses down and deal with what i have.

444cc, rb25maf, t28 or slightly bigger turbo, enthalpy or nistune ecu

[Kingtal0n]

I'm kind of going to thread jack here... I have a few things like 444cc injectors from a gtir, a holset 351, and rb25 maf. I have a (noob mistake) 1.8mm cosworth headgasket, fmic, healthy rebuilt motor with 6k miles on it. I want 300 whp or something around there? What are my options? I'm trying to keep expenses down and deal with what i have.

444cc, rb25maf, t28 or slightly bigger turbo, enthalpy or nistune ecu

your power comes from your compressor. You want 300whp you need a compressor that can flow 34lb/min, give or take depending on your fuel and how hard you push it.

[rob_240]

why dump 2k to 2500 into a sr and not consider spending that money on the bottom end first??

[Kingtal0n]

why dump 2k to 2500 into a sr and not consider spending that money on the bottom end first??

1. I've take it you've never built a bottom end
2. If you have, I take it you've never put 50,000 miles on that bottom end

[rob_240]

1. I've take it you've never built a bottom end
2. If you have, I take it you've never put 50,000 miles on that bottom end

Lol sure thing bud dont be making judgement on people u dont know

[Fuego]

why dump 2k to 2500 into a sr and not consider spending that money on the bottom end first??

Because it's overkill...

[rob_240]

I guess depends what your gonna use it for and if you plan on keeping it. What good is all those other parts when u spin a bearing?

[Danger_Dorn]

your power comes from your compressor. You want 300whp you need a compressor that can flow 34lb/min, give or take depending on your fuel and how hard you push it.

Well its my dd/toy and I like to best the piss out of it

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[Fuego]

I guess depends what your gonna use it for and if you plan on keeping it. What good is all those other parts when u spin a bearing?

I think you said it yourself, it's about what you use it for. That and how you maintain it.

[Kingtal0n]

Just because its "built" doesnt mean it wont spin a bearing.

Building an engine takes years of experience. You have had to have built several, perhaps even fifty of them, and beat them up, blown them up, torn them down, and examined the points of failure for each.
Do they all fail in the same way? What are the common points of failure?

Most people build their engines only to have them fail very quickly. Thats one reason why you see a majority of "part outs" in the for sale section, or "freshly rebuilt engines with just 80 miles". Those are motors that were built, failed quickly, then RE-built, and put up for sale before it happens again. No one wants to come on a public forum and admit they blew up their built engine in just 800 miles. People tend to leave that part out. notice you dont see a lot of built engines with 20,000+ miles. Why is that??

[Mikester]

notice you dont see a lot of built engines with 20,000+ miles. Why is that??

Because many people with fully built, high-dollar builds eventually come to the realization that their 240 has completely sucked the life out of them... Usually, long before 20K miles ever get clocked ;)

Then that once-loved and cherished 'built' motor ends up getting passed from dumbass to dumbass... until it loses its will to go on with life, dies and ends up right back in the for sale section or Craigslist listed as non-running, horribly beaten or possibly FTGH.

[Steveohoes]

FP big t28. Its a t25 with a t28 compressor wheel. Flows more cfm then s14 and s15 t28's. And since its a pretty much a t25 it a DIRECT FIT.

Just pair it with a 550's, z32 maf, and a tune and youll be able to make 300+ easy.

Some guy just made 400hp off one. I kid you not

[ultimateirving]

I don't think they even make fp t28 anymore.. If so I haven't seem any websites selling when I was hunting for a new turbo a year or
Two ago

[Steveohoes]

Forced Performance Turbochargers: Turbo Upgrades (http://store.forcedperformance.net/merchant2/merchant.mvc?Screen=CTGY&Store_Code=FP&Category_Code=Turbo-Upgrade)
(2nd from bottom)

I don't think they have them in stock. Its categorized as a special request upgrade, such as a service. Send in your t25 and get it back as the big t28.

[Fuego]

FP big t28
Some guy just made 400hp off one. I kid you not

I find that extremely hard to believe unless it was built and/or had some giggle juice.

[Mikester]

"Big T28" can mean a lot of things... so can "some guy."

[Steveohoes]

I thought the same, but after doing research on the companys website I found out other wise.

Garrett GT2871R flows around 580-600
Forced performance's modified Garrett t25 "big t28" flows 550 CFM
Garrett s15 T28 flows 448 CFM

Also it costs cheaper to get rebuilt because its still a journal bearing.

here is proof from a car domain:
http://www.cardomain.com/ride/536500
Guy has it maxed out at 20.5-21 on pump gas with a SR with a thicker head gasket and couple bolts on, nothing major done.

@Mikester Context Clues Song (Context Clues by Melissa) - YouTube (http://www.youtube.com/watch?v=xMw0KcEZljE) before you post next time

[TheRealSy90]

DONT do rocker arm stoppers.

DO do dual rocker guides.

T28, 550's, z32 mafs, rom tune. Done.


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[Mikester]

@Mikester Context Clues Song (Context Clues by Melissa) - YouTube (http://www.youtube.com/watch?v=xMw0KcEZljE) before you post next time

Not sure what that means. I read FP's web info, which gave vague info at best... and although 409/338 at 20-21psi is respectable (and stealthy), it doesn't make it any less hard to believe that it's nothing more than a 'T25 with T28 compressor wheel.'

On that note, you may want to avoid using statements like:

"Flows more cfm then s14 and s15 t28's. And since its a pretty much a t25 it a DIRECT FIT. Just pair it with a 550's, z32 maf, and a tune and youll be able to make 300+ easy.

Some guy just made 400hp off one. I kid you not"

See where you fucked up yet? If not, you may want to re-check your own goddamned 'context clues' before posting.

[Fuego]

I'm going to side with Mikester on this one.

You're basically telling us a turbo that flows less is making the same power as a turbo that flows more at the same boost.

I'm sticking with the built/giggle juice or maybe the dyno being way off.

[Tom N]

Dyno numbers with out track times is worthless info.
I kid you not.

[Mikester]

^^LOL^^

That 'some guy's' cardomain site said 12.08ET @124mph. Pretty decent trap speed. But I still can't swallow a T25 fitted with a T28 compressor wheel doing anything but choking on itself- there has got to be more to it considering the compressor wheels (and housings) in our M8270's tower over the little T25/28's... yet we are lucky to see 420-ish to the wheels on fully built setups @25-26psi boost.

[Tom N]

Would need to know the weight if the car.
Weight plays a big factor.

I have a friend who went 10.8 @ 126 in a fwd eclipse with the stock motor and stock 14b turbo ( no nitrous ). Of coarse the car was extremely lightened.


I will say the FP big T28 is old school in DSM land and people have done well with then. Never heard of anyone breaking 400hp with it though. A few people have with a E316g but it flows a little more than the FP T28.

[Hatemy7]

I have a red top SR20DET that I'm hoping to get 300-350 whp out of without having to change up the bottom end and I have a few questions.

First has to do with my turbo. I would really like to keep the stock bottom mount style turbo manifold and use my existing megan elbow, so that leaves me with the T25 or T28 correct? I have heard good things about the ball bearing T28 but its a little out of my budget and perhaps a little more finicky with oil pressure. Not to mention it's difficulty to rebuild.

I'm looking at using Injector Dynamics 1000cc injectors and a circuit sport top mount fuel rail. Does it matter if the opening is 11 or 14? Or will it be a max of 1000cc of flow either way?

Looking at getting a MAP ecu set up since the tuner that everyone in my area suggests, suggests that method of tuning. Megasquirt works well?

Would rocker arm stoppers and ARP head studs be suggested as insurance? I'm taking my head off anyways to do a head gasket anyways. The stock head bolts are torque to yield right?

Any manual boost controllers you would suggest?

Would that be about it? I'm looking at spending around 2 to 2.5k on this whole thing. Doable?

I currently have an ebay front mount intercooler set up and a clutch good for 400 whp


expect rod knock.

Sr20's are ROD KNOCK KINGS! build that shit

[Steveohoes]

Decipher what you want from what I posted. Im not telling you guys a bunch of shit, and pulling numbers out of my ass. I gave you specs of the turbo and data from tests with the turbo.

The OP is looking for a turbo that will make 300-350 HP. This turbo is perfectly capable of doing that and being a direct bolt on. No different coolant lines, no different oil restrictor. DIRECT OEM FIT.



On that note, you may want to avoid using statements like:

"FP big t28. Its a t25 with a t28 compressor wheel. Flows more cfm then s14 and s15 t28's. And since its a pretty much a t25 it a DIRECT FIT. Just pair it with a 550's, z32 maf, and a tune and youll be able to make 300+ easy.

Some guy just made 400hp off one. I kid you not"

See where you fucked up yet? If not, you may want to re-check your own goddamned 'context clues' before posting.

Well you didn't even quote me right, but I see nothing wrong with my statment