More power from a gt28rs?

[edaddeemsp]

I now know from reading through some of the other forums that the factory t25 can be "reworked", to be able to handle at least 300 h.p., by using a different compressor wheel, and some machine work. Is it possible to do that to a gt28rs. My ultimate goal with my car is 400+ h.p., which will be for street/strip, so I want to keep a lower rpm spool time. Just curious if anyone has tried anything like this, or if there is a different turbo that will still give a good spool, but will also be able to support more than 350 h.p.? Any suggestions?

[RyanJayG]

if thats your goal then just get a GT2871R

same spool time (approximately), newer design than the RS

http://www.atpturbo.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=GRT-TBO-022&Category_Code=GRT

[edaddeemsp]

Thnks for the reply and advice. So going off the info from the website, that turbo will bolt right up to the stock mani? I hope cause thats about exactly what i was lookin for.

[mp3moose]

If your looking for 400 horses, the stock mani ain't great.

[jeffmsp]

maybe if he ported the stock manifold it could at least get him up and running. then later upgrade when the $ is not a problem.

[RyanJayG]

that would work, however a ported stock mani is that much more prone to cracking. and a few on the forum have craked their stock mani's without any porting.

but like you said, its much cheaper than getting a nice tubular manifold. MAM has their MSP manifold which is awesome. but you have to pay to play

[edaddeemsp]

Yah, money is the key for the power. I've seen the mam mani,wow, but I also looked into the mam thumper kit. As of now I still don't have a fmic, also I'm in need of a mani, and turbo upgrade of some type, so I have to look further into that whole kit as well. Actually, i'm waiting for beau to reply back in regards to the thumper. His first email said that the thumper would be a good investment, especially if I'm looking for 400+whp. I don't mind having to save for a while to get the product that's going to work best for my needs, just gotta get my game plan down, so I know how much I'll need. Again, thanks for all the input.

[RyanJayG]

its true, if you want 400+ HP the thumper is a better investment, because the turbo used wont work NEARLY as hard to make it there as a GT28 variant. not to mention the thumper mani has larger runners (I think) than the MSP one. so less backpressure

besides, it comes with the FMIC already. though unless you get an AEM your MAF will be a serious choke point for a 400+ HP car

[spacemonkey]

MAMotrosports does wonders.

A general ideal:

Garrett GT Technology
Garrett’s line of GT Technology turbochargers offer state of the art technology and the latest aerodynamic designs for maximum airflow. Water cooled ball bearing center sections are available on selcted models. As an authorized Garrett GT Performance Distributors, Precision offers an extensive offering of Garrett products in addition to our own line of performance turbochargers and accessories.

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width=62>Price </TD></TR><TR bgColor=#3f3f3f><TD vAlign=bottom>130 </TD><TD vAlign=bottom>GT-12 </TD><TD vAlign=bottom>41mm </TD><TD vAlign=bottom>50 </TD><TD vAlign=bottom>0.38 </TD><TD vAlign=bottom>Standard </TD><TD vAlign=bottom>35.5mm </TD><TD vAlign=bottom width=39>72 </TD><TD vAlign=bottom width=82>0.43 </TD><TD vAlign=bottom width=62>$690.00 </TD></TR><TR bgColor=#3f3f3f><TD vAlign=bottom>220 </TD><TD vAlign=bottom>GT-15 </TD><TD vAlign=bottom>45mm </TD><TD vAlign=bottom>60 </TD><TD vAlign=bottom>0.48 </TD><TD vAlign=bottom>Standard </TD><TD vAlign=bottom>41.2mm </TD><TD vAlign=bottom width=39>72 </TD><TD vAlign=bottom width=82>0.35 </TD><TD vAlign=bottom width=62>$690.00 </TD></TR><TR bgColor=#3f3f3f><TD vAlign=bottom>260 </TD><TD vAlign=bottom>GT-20 </TD><TD vAlign=bottom>56mm </TD><TD vAlign=bottom>55 </TD><TD vAlign=bottom>0.53 </TD><TD vAlign=bottom>Standard </TD><TD vAlign=bottom>47mm </TD><TD vAlign=bottom width=39>72 </TD><TD vAlign=bottom width=82>0.46 </TD><TD 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[mspdfreak]

I'll take the GT-60.....to go, please.

[jurgs01]

I think I'm going to get rid of my setup and buy a gas-turbine engine(boom03) . Really, I would like to hear more about the GT2871R turbo. Does it retain the same housing as the RS so there would be little modification to fit it into the stock location?

[RyanJayG]

slightly larger compressor housing than the RS

linkie:
http://www.atpturbo.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=GRT-TBO-023&Category_Code=GRT

obviously a new compressor housing and a wheel. but i think the housing is still small enough to fit a msp.. unlike a GT2540 (which is MASSIVE)

[spacemonkey]

I'll take the GT-60.....to go, please.lol...im sure it will be a hot item for supra...then they can brag about driving a 2,000 supra! T88H is sooooo 2003

http://www.tuningfever.com/albums/userpics/10003/00257.jpg

[BlkZoomZoom]

Hey I got the Maf you need....

[Mental Addiction]

The GT28RS and GT2871 share the same parts.The only difference is the compressor wheel(GT2871 uses a 71mm).The Compressor cover is the same one, but machined out to fit the larger wheel.

[MPNick]

I now know from reading through some of the other forums that the factory t25 can be "reworked", to be able to handle at least 300 h.p., by using a different compressor wheel, and some machine work. Is it possible to do that to a gt28rs. My ultimate goal with my car is 400+ h.p., which will be for street/strip, so I want to keep a lower rpm spool time. Just curious if anyone has tried anything like this, or if there is a different turbo that will still give a good spool, but will also be able to support more than 350 h.p.? Any suggestions?I can let you know for sure in a few weeks. We are doing a 400whp Speed right now. Hoping to be around 400 hp at the wheels.

GT28RS/71 turbo
Ported stock exhaust manfiold
Ported stock intake.
MPI Stage III cylinder head.
Ion exhaust system.
MPI short block
MPI custom intercooler
MPI Tuner, with staged injectors in intake.
MPI 80mm MAF
MPI high output ignition system
24psi and C16 fuel
Some very good luck.

Not sure if we would hit a wall in air flow with the turbo or to much back pressure in the exhuast, But this is why we play the game. To find out for sure, no more guessing what will or will not work. Lets get some facts for once.

[mazdaowner123]

This is a good thread.

~brian

[spacemonkey]

EXCELENT JOB...cant wait. Agree with you 100% lets see what can be done instead of theorize. This should be good!

[Speed Vision]

Since we are talking turbo's here. How efficient would it be to just upgrade our turbo to the GT28RS. I'm only looking to get a max of about 275 to 290 whp out of my car. Would it be as simple as swapping the two out and going on with every day business. Or would I need another manifold to help me. I know our manifold will work, but is this recommended..

Of course this is after: pistons/rods , and removal of the Unichip ( possibly ) for some other kind of engine management.

[Puckpimp71]

I'd bet the unichip could be tuned for that... I just wouldn't want to pay for it. You could get a haltech or MPI and a laptop for the tuning time you'd pay for with the chip.

[MPNick]

Since we are talking turbo's here. How efficient would it be to just upgrade our turbo to the GT28RS. I'm only looking to get a max of about 275 to 290 whp out of my car. Would it be as simple as swapping the two out and going on with every day business. Or would I need another manifold to help me. I know our manifold will work, but is this recommended..

Of course this is after: pistons/rods , and removal of the Unichip ( possibly ) for some other kind of engine management.
I would go with the stage I GT25 turbo. For less then cost of the GT28RS you can have your stock turbo reworked for the bigger wheel, ported exhaust housing, ported S pipe and ported exaust manifold. This set up is good for 328whp. You would not only hit the 290 mark that you what you will get there much faster.

Piston, rods and EMS we have idea's for that also.

[Speed Vision]

Ok, cool. I'll def. keep that in mind when it comes time to start the upgrades...

[cmantucansam]

In my opinion, get a t3/04 ballbearing or not, not only will it sound the nicest and be the most efficient, but you don't have to worry about blowing it if you want more boost. Shit, it won't spool as fast as a smaller turbo but in 2nd or 3rd gear, the turbo won't slow down. Its not even that much more, maybe a couple hundred

[RyanJayG]

he'd need a new manifold for the T3 flanged turbine of that turbo. thats why the turbos that were recommended, were recommended.

[cmantucansam]

what are you saying, getting a new manifold is out of the question.

[BlkZoomZoom]

Why would you want a T3/t4 if you can make the same, if not more, hp. levels without having to buy a manifold or dealing with the lag associated with it.

[RyanJayG]

oh the comedy.... lol

[FSDET]

I can let you know for sure in a few weeks. We are doing a 400whp Speed right now. Hoping to be around 400 hp at the wheels.

GT28RS/71 turbo
Ported stock exhaust manfiold
Ported stock intake.
MPI Stage III cylinder head.
Ion exhaust system.
MPI short block
MPI custom intercooler
MPI Tuner, with staged injectors in intake.
MPI 80mm MAF
MPI high output ignition system
24psi and C16 fuel
Some very good luck.

Not sure if we would hit a wall in air flow with the turbo or to much back pressure in the exhuast, But this is why we play the game. To find out for sure, no more guessing what will or will not work. Lets get some facts for once.
????

[MPNick]

????

Not done yet, waiting for parts.