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What Is The Best Turbo For 300rwhp With Minimal Lag?

fubar

By fubar,
in Engines & Forced Induction

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fubar Enthusiast

fubar

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Hey all

Im running a neo motor in my r32 and was making 280rwhp with a standard tubro! untill it leaned out, cooked a piston and snapped the turbo shaft. Currently rebuilding the motor and need to sort out my fuel issues then a turbo. With my current set up the standard turbo had good low down response and torque, not much lag and would cook third under boost. The suspension and driveline is sorted and I mainly use it for fun on the track, time trials and drifting.

Not chasing any more power just want to know what would be the best turbo for that same sorta low down response and torque, so basically similar to the neo turbo but a bit better:)

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The Dan Grand Master

The Dan

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Not neccesarily more responsive. There MAY be 100rpm in it but the disco makes up for it with a better comp cover and then it also has the advantage of being able to turn up the wick when this guy decides he wants a bit more hp.

And yes, no matter what he says now, he will want more later.

300hp is a rediculous power figure. You can easily do it on the standard turbo if you get it tuned properly

R31Nismoid Grand Master

R31Nismoid

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Not neccesarily more responsive. There MAY be 100rpm in it but the disco makes up for it with a better comp cover and then it also has the advantage of being able to turn up the wick when this guy decides he wants a bit more hp.

And yes, no matter what he says now, he will want more later.

300hp is a rediculous power figure. You can easily do it on the standard turbo if you get it tuned properly

Oh now come come... i draw the line @ a legit 300RWHP out of a factory turbo.

300hp, yes, but 300RWHP is the aim.

Given the amount of threads where the OP doesn't even know what they want, i like a thread like this :cool:

N1GTR Grand Master

N1GTR

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It's ok to want 300rwhp, just depends what it's going to be doing IMO

For example, skidpan days it would be good fun, or really tight hillruns (the type where you question having a 1500kg skyline in the first place) it would also be good at.

Can't see it being fun anywhere else though! But of course it's all personal taste.

I definatly agree, get something with headroom for later, the power bug bites all.

hypergear Grand Master

hypergear

Posted
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Just high flow your stock Neo turbo with a 2871 52T profile CHRA. Will get you full boost by 3200RPM, and max out at about 250rwkws. Plus every thing bolton no modifications required.

discopotato03 Grand Master

discopotato03

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I know that if you use the GT2871R 48T cartridge to hi flow an R33's RB25 turbo you can keep the std compressor housing because when machined out for the larger compressor wheel you have just enough wall thickness left to mount the std inlet duct . With the 52T one I don't know . Didn't Lithium do this Hi Flow mod before the GT30 turbo went in ?

HKS rates their 2530 and 2535 at 320 and 340 PS , I reckon you could look at a 2871R 48T as a 2535 with a more modern compressor wheel .

You'd think 300 to 340 Hp out of a Neo spec RB25 would be smooth torquey and reliable , and not bank breaking .

Lag ? Whats lag ?

A .

W0rp3D Grand Master

W0rp3D

Posted
Posted

At that power you have reached the limit of the afm, injectors, fuel pump and ecu, for a reliable 300+ you need to start upgrading a lot of other things besides the turbo.

fubar Enthusiast

fubar

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Cheers for the guys that are helping me out. hp doesn't always mean faster!! its how its set up and how you drive it, the japs did there thing on this car in japan and its a awesome car to drive.

At 260hp this car cooks 4th gear drifting with brand new 235' s on the rear, got tenth fastest lap time out of 70 cars with second hand street tyres on and was doing the same lap times as the evo's and gtrs. i've dragged plenty of ppl that say they have done all this shit to there car and dyno at 420hp and so on and i still just pull away from them, which just cuts them because they talk their cars up so much and spent so much money chasing hp!!!

As for my set up it has blue injectors which i think the purpleish ones are standard so if anyone knows what the blue ones are let me know? a gtr fuel tank, z32 afm, bigger coils, gtr cams, oil cooler, 2 way diff, orc clutch, all suspension is adjustable camber and so on, a shitty old apexi which i need to change to prevent my motor from leaning out again and service the injectors if they are not standard. any reccomendations on ecu? im thinkin the nis tune cause im running out of money

Roy Grand Master

Roy

Posted
Posted
300hp lol

I dont get it, what is so funny about wanting 300hp? If you are driving your car hard, then 300hp most likely means less oil temp, less water temp, less strain on the engine internals. It also means less stress on clutch, diff, gearobx and driveshafts. It means less fuel used at the track, less torched tyres...

If you are into sliding nad fun then a solid 300hp out of a rwd car is plenty of fun, you cam do it easily with worst case cheap used GTR injectors and fuel rail etc etc.

It makes no sense to go and ake 450hp and forever be chasing cooling issues at the track etc etc

300rwhp is lots of power, its probably as much/more then a 996 GT3. Which at 1400kgs odd is not a slow car

PM-R33 Grand Master

PM-R33

Posted
Posted (edited)
i've dragged plenty of ppl that say they have done all this shit to there car and dyno at 420hp and so on and i still just pull away from them, which just cuts them because they talk their cars up so much and spent so much money chasing hp!!!

So your stock turbo 200rwkw car beats and pulls away from 300rwkw cars in a drag race?

Edited by PM-R33
Dale FZ1 Veteran

Dale FZ1

Posted
Posted
So your stock turbo 200rwkw car beats and pulls away from 300rwkw cars in a drag race?

Maybe I took the OP's comments a little differently, but I'd think he's generally looking at the "drag" between turns, not a 1/4 mile? Don't under-rate how fast and easily a 300rwhp Skyline can cover ground...

hp doesn't always mean faster!! its how its set up and how you drive it,

At 260hp this car cooks 4th gear drifting with brand new 235' s on the rear, got tenth fastest lap time i've dragged plenty of ppl that say they have done all this shit to there car and dyno at 420hp and so on and i still just pull away from them

I dont get it, what is so funny about wanting 300hp? If you are driving your car hard, then 300hp most likely means less oil temp, less water temp, less strain on the engine internals. It also means less stress on clutch, diff, gearobx and driveshafts. It means less fuel used at the track, less torched tyres...

If you are into sliding nad fun then a solid 300hp out of a rwd car is plenty of fun,

It makes no sense to go and ake 450hp and forever be chasing cooling issues at the track etc etc

Agreed 100%. Sounds like he is out there and doing it. Incidentally how do you find your 32 deals with heat loadings?

I know that if you use the GT2871R 48T cartridge to hi flow an R33's RB25 turbo you can keep the std compressor housing because when machined out for the larger compressor wheel you have just enough wall thickness left to mount the std inlet duct . With the 52T one I don't know . Didn't Lithium do this Hi Flow mod before the GT30 turbo went in ?

You'd think 300 to 340 Hp out of a Neo spec RB25 would be smooth torquey and reliable , and not bank breaking .

Lag ? Whats lag ?

That spec high flow was mine Adrian. 300rwhp @ 12psi. Max boost by 2700rpm. Easy, reliable power and because it made power early it was very easy to drive fast point to point. Not really a drag strip weapon, but in terms of getting power down early out of turns it could get the jump on 260-300rwkW cars and generally punch above its weight.

I've not seen anyone else run with that turbo spec, but it certainly worked. Not sure, but I don't think it would do much more than 300rwhp, cranking more boost should yield bigger mid range stick though. I often wondered if an OP6 housing would have allowed it to make torque as the rpm went over 6000, but not have a major impact on torque between 2000-3000rpm.

Just high flow your stock Neo turbo with a 2871 52T profile CHRA. Will get you full boost by 3200RPM, and max out at about 250rwkws. Plus every thing bolton no modifications required.

Given that this is a proven unit, I'd go this way. Really very similar to the unit I had built, with the advantage of some extra flow capacity if desired. Back it in this should produce the 300hp @ 12psi as mine did, but with the ability to make another 40hp with a few more pounds. Possibly some differences in boost response right down low in the rpm, but I'd be certain Stao could supply the 48T cartridge if it was an issue.

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