Best Turbo to get 270awhp without Building motor

[ActiveMonkey]

I plan on going stage 3 but there are so many options out there i would like to hear people opinions.

My goal is 250-270 awhp.

[zandrew]

Gt2560r would be able and spool faster then the others. It would be my pick. It's very close to gt2860rs size, 46.5mm inducer and 60mm exducer vs 47.2 mm inducer and the 60mm exducer. It's also called a gt28r but it's not a true gt28 turbine. If you want something you could upgrade later on and get some more pony out of it gt2871r, I ran one one my stock engine for awhile with no issues.

[MetalMan]

Is E85 an option for you? My FrankenTurbo kit (old non-mixed-flow version) with upgraded connecting rods and everything upgraded did 277 awhp and 309 ft-lbs @ the wheels:



This also has better spool than anything GT28 (I would know, my B6 is APR Stage 3+ which uses a GT2860RS). Seriously, I have full boost ~3,000 RPM.

Also FrankenTurbo has the benefit of looking stock and working with a factory cat / airbox for California SMOG check. Every 2 years I am simply able to swap back to stock cat and intercooler to pass SMOG.

[ActiveMonkey]

E85 is not an option. This must be tuned on 91 only. No methanol or other additives.

[B5nDisciple]

E85 is not an option. This must be tuned on 91 only. No methanol or other additives.

While it is the low end of your goal...
I'm guessing the mixed flow F21 will be right around 250 awhp on 91. I'm pretty sure my setup is. I made 286 awhp on E85. Stock block. And I run on 91 for the winter.



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[MetalMan]

E85 is not an option. This must be tuned on 91 only. No methanol or other additives.

Are you at all concerned with the California SMOG testing situation? For example, if you go with a FrankenTurbo kit or an Eliminator, your setup will still look fairly stock and it would be easy enough to swap in a stock cat.

[b6Hate4]

Elim exhaust housing with a comp chra

[ActiveMonkey]

Are you at all concerned with the California SMOG testing situation? For example, if you go with a FrankenTurbo kit or an Eliminator, your setup will still look fairly stock and it would be easy enough to swap in a stock cat.

This would be ideal so I wouldn't need to "find a guy"

[Seerlah]

Elim exhaust housing with a comp chra

Totally forgot about this option.

[Believer]

I have the F21 mixed flow. Based on the airflows I see and the physical limitations of it's ability to boost past a certain point, on 91, 250 awhp is not possible. The most I've seen on the Motoza road dyno with 93 and meth is 244 awtq and 235 awhp and the motor is built. That is not a real dyno, but I trust that it is fairly close.

My vote was for the 28r that Zandrew mentioned, but there will still be compromises in your spool characteristics (read: more gradual) with not having forged rods. That turbo still spools very fast, makes very good torque and will absolutely, given time, break rods if not tuned correctly.

[ActiveMonkey]

Elim exhaust housing with a comp chra

I am unfamiliar with the term "Comp chra" please explain...

[Believer]

I am unfamiliar with the term "Comp chra" please explain...

He's saying use a Comp Turbo center hub rotating assembly (chra) with an eliminator turbine housing.

[rolandoa1324]

I have a brand new stock turbo with a test pipe, cold air intake and a tune and I can keep up with new wrx and some old g35 so I should be pushing like 240 at least but I need to dyno to make sure


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[rolandoa1324]

But I want to get more top end hp so what turbo or other mods would you guys recommend?


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[ActiveMonkey]

I have a brand new stock turbo with a test pipe, cold air intake and a tune and I can keep up with new wrx and some old g35 so I should be pushing like 240 at least but I need to dyno to make sure

But I want to get more top end hp so what turbo or other mods would you guys recommend?

Thread hijacking attempts aside, no way in hell a B5 with a stock turbo, k03 or k03s, tuned or not is pulling 240... Am I missing something?

[genecan]

GT2560R is a small turbo. I had it with a regular and agressive tune for pump gas. Both dynoed and were far away from from 250 awhp. If you decide to push it further you need to build your engine. Ask me how I know this.

Best choice is a GT28XXR or B1 framed EFR or comparable turbo from other brand - all of them tuned for late boost translating into a laggy car. If you tune for early boost - you need to build your engine. You can not have it all...

[b6Hate4]

Thread hijacking attempts aside, no way in hell a B5 with a stock turbo, k03 or k03s, tuned or not is pulling 240... Am I missing something?

Not missing anything. Thats a load of shit, those are ko4 numbers. He might be confused as to WHP/CHP

[genecan]

240 for K04 may be for CHP, but kind of too high number, especially on pump gas.

[ActiveMonkey]

rolandoa1324 - I looked at your profile and realized you are a pretty new member. Do you have a B5? Your avatar looks like a B7. What kind of car do you have?

[rolandoa1324]

I'm sorry lol and I have a b8


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[b6Hate4]

Typical b8'er.

[rolandoa1324]

I have 2010 b8 I got it almost a year ago and I just started fixing it up 2 months ago:) but I didn't do my history and found out about the oil problem the hard way and I need to fix that asap


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[ActiveMonkey]

What do people think of the GT2867? Middle ground between GT28rs and GT2871.

[Seerlah]

Typical b8'er.

Play nice guise...knewb thought he knew!!!

[MrSnickelsnizer]

K04....
http://www.ebay.com/itm/122006738662...%3AMEBIDX%3AIT
bought one haven't installed. It would good up to 250ish.

[nunya]

I plan on going stage 3 but there are so many options out there i would like to hear people opinions.

My goal is 250-270 awhp.

Good luck getting 270whp on 034's dyno without a built motor. :-)

--dillon

[ActiveMonkey]

Their dyno is well known to being tough.

[nunya]

Ive been on it many times. I got 364 on my best pull on pump gas. I got 308 before the IE intake manifold. For you to get 270 on a stock motor if going to be hard, and very risky. I personally dont think nate would tune it that high on a stock motor. He stops at the point it puts the motor at risk, then dials back a little.

--dillon

[zandrew]

Hp is kind of a lame request. I say that since hp is a derivative of torque when considering time, or distance traveled. In the case of an engine distance traveled is rpm. I say this since 270awhp at 5250nrpm is completely different then 270awhp at 6500 rpm. Case in point it would require 270 lb ft to create 270 awhp at 5250 and it would only require 218 lb ft at 6500. The same 218 lb ft at 5250 would only make 218 awhp.

So you have to ask yourself how far do you want to rev and how much lag can you tolerate. You can get there with 2560r (may require a small trick) and it still have plenty of torque to not be a lame-O.

[B5nDisciple]

I have the F21 mixed flow. Based on the airflows I see and the physical limitations of it's ability to boost past a certain point, on 91, 250 awhp is not possible. The most I've seen on the Motoza road dyno with 93 and meth is 244 awtq and 235 awhp and the motor is built. That is not a real dyno, but I trust that it is fairly close.

My vote was for the 28r that Zandrew mentioned, but there will still be compromises in your spool characteristics (read: more gradual) with not having forged rods. That turbo still spools very fast, makes very good torque and will absolutely, given time, break rods if not tuned correctly.

Makes me want to dyno it on 91 to see where it comes in... :)

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[b6Hate4]

Hp is kind of a lame request. I say that since hp is a derivative of torque when considering time, or distance traveled. In the case of an engine distance traveled is rpm. I say this since 270awhp at 5250nrpm is completely different then 270awhp at 6500 rpm. Case in point it would require 270 lb ft to create 270 awhp at 5250 and it would only require 218 lb ft at 6500. The same 218 lb ft at 5250 would only make 218 awhp.

So you have to ask yourself how far do you want to rev and how much lag can you tolerate. You can get there with 2560r (may require a small trick) and it still have plenty of torque to not be a lame-O.

This.

Also OP is 270hp the goal with the widest powerband possible?

[ActiveMonkey]

250-270awhp with full boost no later than 3500rpm is the goal.

I like driving in the tight twisties and the above goal would fit my driving style.

[genecan]

EFR 6255 is your turbo, but you need rods for safety. This power field is very much on the edge. As I said above, early spool and boost will smash your stock rods at the required power level.

...or keep ypur stock engine and decrease power expectations.

[Believer]

Makes me want to dyno it on 91 to see where it comes in... :)

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I'm not saying you should but ya you should :)

[b6Hate4]

250-270awhp with full boost no later than 3500rpm is the goal.

I like driving in the tight twisties and the above goal would fit my driving style.

Get a 2.7.

[ActiveMonkey]

Get a 2.7.

Hard pass

[zandrew]

250-270awhp with full boost no later than 3500rpm is the goal.

I like driving in the tight twisties and the above goal would fit my driving style.

You need rods, really. With a low rpm boost onset it's going to be stressing the rods.

You can buy the gt2560r for less then $800 new. It's a really good turbo for the cost. It was the stock turbo on the s15 Silvia sr20det. AWE used it in a kit. The gt2860rs is a step up and will make a good bit more but almost guaranteed to detonate rods if you are not really careful.

Genecan- borg warner does not make the 6255 anymore, they make a 6258 which is a gt2860rs on roids.

You can not get me to buy a comp turbo.

[ActiveMonkey]

Would rods be the only thing I'd need?

[genecan]

You need rods, really. With a low rpm boost onset it's going to be stressing the rods.

Genecan- borg warner does not make the 6255 anymore, they make a 6258 which is a gt2860rs on roids.

You are right. I just recetly saw a local company selling a handfull of 6255 and I thought they are back, but I guess they were just old stock. 6258 let it be.

I smashed rods with GT2560R, so it is not as safe as many people think it is.

[b6Hate4]

Hard pass

Hah, I know I was trolling. I liked my BT 1.8t, they are fun as hell!