Gt2259 smaller turbo better torque

[-Willis-86touge]

Originally Posted by sw20kosh

No one has been able to reproduce that low end torque on a different dyno with the ptuning kit. That is just an artifact of how they have their dyno setup. On a dynojet two ptuning kits around here make about 150-160 ft lbs at 3k rpms. You cannot get around the physics of a GT3076r. That being said the ptuning kit is the best turbo kit on the market.

I'm sorry I wrote that wrong. The frs turbo was done by ptunning and the wrx was done by a different shop. Two different tuners lol sorry about the confusing. And yes I agree different shops and dynos show different variables. This one below is also on a wrx with e85 but it has I believe a down pipe and full exhaust and intake. And yes not showing as much torque in lower rpms but still really healthy numbers

[-Willis-86touge]

And this one also e85 with bolt ons but with boost turned up to 22 psi on stock turbo

[Northwest86]

You still aren't going to get a torque graph like a DIT. The one I posted on the first page is about as good as you can get without having the turbo fall off like no tomorrow. And I can guarantee it's excellent as a daily. Though run it with E85 and 10 psi and it'll be bloody close. With your options in America though, I'd advise a Supercharger. A JR or Edelbrock seem to be good choices. Or wait a year or two for Coyoda's to be sold to the USA.

[CSG Mike]

Originally Posted by -Willis-86touge

I agree ptunning prob has the best available! Still I beg the question on what the mgt2259 would do on are motor. Fact it's smaller and twin scroll so should be more responsive and dare I say it less "lag" and I understand that the hp will not be as high as some dynos but there have got to be more than me who sees that hp is not everything. It's the ratio between hp and torque.

With, specifically, the MGT2259S, theoretically if we had piping like a DIT, I would expect full boost to be available from ~1700 RPM (catted) with ~250tq up to ~6000rpm, and ~280hp crank peak.

As with the FA20DIT, the turbo will choke the engine up top.

With some freed up flow and E85, I would expect an easy 120 crank hp gain.

[Northwest86]

And a hole in the block, tickets from burnouts at every traffic light and no tread on the rear tyres.

[-Willis-86touge]

So like a Japanese "doge viper" lol didn't they have one of those drift in d1 ??? But seriously I think you might be worried a little that the car would be uncontrollable. A lot of people here run 255 and such. hell I've seen bigger! And I'm sure with the right suspension setup and tires it would be bad

[-Willis-86touge]

Originally Posted by CSG Mike

With, specifically, the MGT2259S, theoretically if we had piping like a DIT, I would expect full boost to be available from ~1700 RPM (catted) with ~250tq up to ~6000rpm, and ~280hp crank peak.

As with the FA20DIT, the turbo will choke the engine up top.

With some freed up flow and E85, I would expect an easy 120 crank hp gain.

Question how come would you project lower numbers than the wrx seeing how we have higher compression? And better fueling options!

[xwd]

This thread makes my head hurt. It's not like we're breaking new ground here with boosting a car.

The dyno only shows part of the story, there is also response. A B-W EFR turbo like the EFR6258 has much better on/off response than a run of the mill GT or IHI turbo. At the end of the day if you want more torque down low, put on a smaller turbo or use one of the TVS supercharger kits.

There is also a tuning reason why you see more gradual torque, the hard hit of torque destroys rods. There are at least a few tuners on here who tune that way.

[CSG Mike]

Originally Posted by -Willis-86touge

Question how come would you project lower numbers than the wrx seeing how we have higher compression? And better fueling options!

I'm not. Carefully, re-read my post.

[-Willis-86touge]

Got ya, didn't realize you were projecting pump gas numbers at first, personally I believe we would have to run e85 because the turbo would run to hot and with our compression+pump gas=boom thanks for acknowledging that it would have boost down low!

[-Willis-86touge]

Originally Posted by xwd

This thread makes my head hurt. It's not like we're breaking new ground here with boosting a car.

The dyno only shows part of the story, there is also response. A B-W EFR turbo like the EFR6258 has much better on/off response than a run of the mill GT or IHI turbo. At the end of the day if you want more torque down low, put on a smaller turbo or use one of the TVS supercharger kits.

There is also a tuning reason why you see more gradual torque, the hard hit of torque destroys rods. There are at least a few tuners on here who tune that way.

The reason I suggested this is not to be ground breaking just to present different ideas. But using the post below you csg stated probably full boost at 1700 rpm. When was the last time you were that low in the power band when driving beside initial take off. Hence me be living that with this turbo we would never lose boost. If so very rarely! Make decent numbers. In turn creating a better daily driver.

[CSG Mike]

Originally Posted by -Willis-86touge

The reason I suggested this is not to be ground breaking just to present different ideas. But using the post below you csg stated probably full boost at 1700 rpm. When was the last time you were that low in the power band when driving beside initial take off. Hence me be living that with this turbo we would never lose boost. If so very rarely! Make decent numbers. In turn creating a better daily driver.

You would absolutely lose boost, every time you lift on the throttle and/or perform an action that actuates your BOV/Recirc.

Even if you are over the minimum boost threshold RPM, you still have to wait for the system to pressurize.

If you permanently want boost, you need a supercharger, or the new NSX for "boost".