Precision Billet Turbos

[sky30]

any one have results pf 3566 vs normal gt35?? or know of any?

[MannyFresh]

1333081219[/url]' post='6296649']

2 were redundancies, this one....basically comes down to the owner being a lieing flamin mongrel hole and saying it was a 3 week trial period instead of the 3 months we agreed upon before I started

Sounds like you are a bad worker lol.

Trying out my 6766 soon

[Lithium]

Why are people talking about the 3566, isn't that just some rugged big old Garrett wheel thrown on a GT35 core to make a bit more power? Its not a Precision turbo, and odds are ultimately a frankstein thats not likely to be worthy of comparing to the turbos mentioned in this thread.

[GTScotT]

why does it seem like there are way too many sizes available for these things?

I mean, 6766, 6262, 6266, 6466, 6462?

What's going on lol

[PJ.]

The more variety the better if you ask me, turbo evolution! Would you rather make sacrifices to almost get what you need, or get exactly what you need?

The 66mm exhaust wheels are supposed to be replacement models for the 6262/6265/6766. I don't believe they make a 6462.

[jet_r31]

why does it seem like there are way too many sizes available for these things?

I mean, 6766, 6262, 6266, 6466, 6462?

What's going on lol

Really that always been the case..turbonetics, ITS have always been like that..only garrett that has f**k all range, and there was(probally still is the 68 exhaust wheel..lol

I hope they make something to replace the 7680...96 I REALLY wanted that turbo for my R31, i don't whether to pony up and buy one now if i can find one, or wait and hope something

replaces it...

cheers

darren

[jet_r31]

any one have results pf 3566 vs normal gt35?? or know of any?

ask the vl dudes, common thing for them, i woudn't do it, and not on a manual car...

steve has one on his white vl

cheers

darren

[sky30]

ask the vl dudes, common thing for them, i woudn't do it, and not on a manual car...

steve has one on his white vl

cheers

darren

Hey darren,

Didnt realise steve had 3566, thought it was just a gt35.

Im leaning towards the forced performance gt3586 hta with billet comp wheel. The evo guys are making crazy power with them and boost vs rpm is same as std gt35 when they back to back test them. (still running bens old gt35 on mine atm)

[BOBBYr34]

All this turbo talk without compressor maps hmmmmm.

How do you know when your turbo is surging ???? you need a compressor map to determine this. You can keep change turbo's till you find the right one ( expensive excerise)

[zebra]

...or just pick one that has been proven to work

[BOBBYr34]

...or just pick one that has been proven to work

yes provided you have the same spec motor and other parts.

[Lithium]

All this turbo talk without compressor maps hmmmmm.

How do you know when your turbo is surging ???? you need a compressor map to determine this. You can keep change turbo's till you find the right one ( expensive excerise)

You'll typically know when your turbo is surging. I've lost a bit of faith in compressor maps after seeing Garrett release multiple versions of its "same spec" GT3071R and GT3582R compressor maps, I wouldn't be surprised if there were other turbos out there which they've done that with as well - but when a compressor map changes for a compressor wheel design which hasn't it rattles my confidence.

To some degree the risk of surge for a given power level is quite a lot lower, engines breathe a lot better and compressor maps are typically wider than they once were - there is SO much information out there on how different combinations work on different cars that its easier and more reliable to see how a particular turbo worked on an engine of certain displacement/VE/etc than to pull out a ruler and a calculator and do some semi-educated guessing based on assumptions using information which may or may not be entirely accurate.

[GTScotT]

To some degree the risk of surge for a given power level is quite a lot lower, engines breathe a lot better and compressor maps are typically wider than they once were - there is SO much information out there on how different combinations work on different cars that its easier and more reliable to see how a particular turbo worked on an engine of certain displacement/VE/etc than to pull out a ruler and a calculator and do some semi-educated guessing based on assumptions using information which may or may not be entirely accurate.

Yet what if your the first malaka to try it out? AKA the pioneer of that model on that motor. How do you make your educated guess then good Sir?

[Lithium]

I would never be the first person to ever try a particular turbo out, unless it was completely for free.

Obviously I'd ideally have compressor maps etc etc, but we can ascertain quite a bit from observing how other setups have handled these. For example, from when I have plotting compressor maps for 4G63s and RB25s/26s etc the trend I've found is that a 4G63 would require a lower surge line than RB equivalents - I spend a lot of time looking into how 4G63s perform with different turbo combinations partly because my next fast car will probably use one, and partly because if a 4G63 doesn't surge with a particular combination then an RB25+ is very unlikely to.

My bigger concern with not having compressor flow maps for these turbos is that I don't know how the comp efficiency lines fall over in flow vs PR, having seen how peaky some modern wheels are I'd be a bit concerned about the possibility of deciding a particular setup needs 62lb/min at 1bar of boost and ending up with the equivalent of of a GTX3076R, which loosely speaking CAN flow near 65lb/min but it will only even think about flowing 60lb/min at 1.4bar of boost.

Observing dyno results and real world performance you get a good idea of the window of efficiency, for example if an EVO can run 40psi through a PT6266CEA and not surge and a Supra can make >700whp on 30psi with the same unit on E85 - or 600whp on pump gas at 22psi, then its a very safe bet that an RB25 is going to fit between both in terms of choke line and surge line.

[GTScotT]

Lol all well and good but someone has got to be the first.

Most of these up and comer brands dont have the backing that Garrett (HKS) do. Its normally some poor bastard end user who will trial it out, or in some lucky cases the sponsor shop will put one on their own car.

I think for a lot of people the outcome on these is an educated guess/mystery.

[Lithium]

Fwiw HKS, Kando, Trust never gave out compressor maps that I am aware of. People in the Kando thread are talking about getting anti-surge housings for their turbos, I've never seen a compressor map from Mitsubishi with an aftermarket modified housing - which WILL affect the map. So how did people in there decide on their combinations?

[GTScotT]

Fwiw HKS, Kando, Trust never gave out compressor maps that I am aware of. People in the Kando thread are talking about getting anti-surge housings for their turbos, I've never seen a compressor map from Mitsubishi with an aftermarket modified housing - which WILL affect the map. So how did people in there decide on their combinations?

Kando are Trust/MHI copies, Trust produced kits for almost every car under the sun with those turbos. I for one went to websites like Nengun and researched what kit trust made for what car, which gave me a clear indication of what would work.

'FWIW' HKS also sold their shit in kits as well as on their own, again enabling people to make an educated decision.

And, if you read the Kando thread, there are people looking to buy surge ported housings because............. Wait for it....................... They encountered surge while tuning. OMFG I KNOW RIGHT. The surge ported housings are just the intended Trust style housing with surge ports drilled into it, no secret science/gamble recipe.

[Lithium]

Wait for it....................... They encountered surge while tuning. OMFG I KNOW RIGHT. The surge ported housings are just the intended Trust style housing with surge ports drilled into it, no secret science/gamble recipe.

You talking to me like I'm an idiot... then spouting the above is a bit much for me. The problem with debating with an idiot is they drag you down to your level and beat you with experience, so that circle ends here - regardless of who the idiot may be.

[MannyFresh]

...or just pick one that has been proven to work

You are not very mechanically educated eh?

[GTScotT]

You talking to me like I'm an idiot... then spouting the above is a bit much for me. The problem with debating with an idiot is they drag you down to your level and beat you with experience, so that circle ends here - regardless of who the idiot may be.

lol you did ask a silly question (how did people who encountered surge decide to try surge ported housings?) so I gave you a silly answer.

I still love you though man, dont get mad.