Stock bf turbo ported and 12psi actuator

[ken666]

On 4/14/2017 at 10:12 AM, My_XR6_Turbo said:

Question. I saw this video. What makes the turbo sound like a jet? I'm not a fan of the dosing noise though.

 

What power is the stock turbo good for if ported?

 

 

Haha! that's exactly how my XR6 sounds with the stock turbo....fitted with a high flow core @ 20psi.

Only problem is, that it didn't last very long at that boost and now sounds like it's got sand in the bearings after turning the engine off.  

[k31th]

that's not a good sign...

[ken666]

is ther any threads you can think of that discuss the options for upgrading my turbo? I have been recommended a GTX3582R 2nd gen by a tuner... that claims it's good for up to 550rwkw?

But he didn't tell me the alternatives available.. (obviously cos that's what he has in stock!).

I currently produce 612hp at the wheels, but @ 20psi and a sh*tload of other mods (everything!)

I would prefer to run less boost to get a longer turbo life, and not be so temperamental with even just a different brand of fuel being used

[k31th]

well, it depends what your "high-flowed" one currently is spec'd to and if you want to get back to that same level... a GTX3576 (or equivalent precision 57-62mm turbo's) is a quality option if you want to get boost faster but not have as much in the top end.

[ken666]

14 minutes ago, k31th said:

well, it depends what your "high-flowed" one currently is spec'd to and if you want to get back to that same level... a GTX3576 (or equivalent precision 57-62mm turbo's) is a quality option if you want to get boost faster but not have as much in the top end.

I have become fond of the top end power! and have already ordered 4.1:1 gears to compensate for the "lag", and the cam upgrades I have waiting to fit.

not sure what the current specs are, except apparently it was a Nizpro stage 3 1/2 setup?

It was a bit dead until 2800rpm, but then frightens the sh*t out of me (and anyone else in the car!).

I'm not worried about the extra rpm and fuel consumption its going to use, as long as its a rocket when I decide to let loose..

I'm only running 245/35/20's on the rear, so I need the extra power to catch up once traction is achieved 

Ohh, and I would like to potentially make 750hp at the wheels on a separate tune for E85 

Edited 06/01/19 02:30 PM by ken666
missed a bit of info

[k31th]

no idea what that "stage" of nizzy is (nobody knows what that crap means for sure).

 

hmm, a good option would be 6466 prec. better spool by a little bit, probably the same top-end.

 

but realistically the way to go would be to ask whoever upgraded your current turbo about your options.

[ken666]

cool, I'm just looking at options atm, but it will all come together and go on the dyno in March when I return from holidays in Russia!

I prefer to do all of my own mechanical work, so I know exactly what is done, and any potential problems could arise from components at, or close to their limits.

Obviously there are a lot of experts in this field, but they can be expensive and/or biased to certain components that they sell due to profit made on their bulk bought items.

The research I have done on my current setup, has constantly concluded my turbo is the biggest limitation to reliability and more power, simply due to being so close to it's outer limits?

I assume a bigger volume pump @ lower boost, will provide both, more headroom and reliability? (and obviously more lag @ lower rpm?)

But I'm new to turbo's, so I want to completely understand them myself before making an uneducated guess which one is best for my needs.

[Puffwagon]

I went from a stock turbo to a gtx wheel in a 0.7comp housing to a gen2 gtx3582r and have had all of them at 20psi+ at one time or another.

 

Imo if you are already running a modded turbo at 20 psi you will be disappointed with a gen2 gtx at 20psi as they aren't much of an upgrade. Although you can run more boost through it, you won't be able to do it on 98 octane, excluding cat skinning cases.

 

If you are looking for top end power, a decent upgrade from a gt35 size turbo is to go external gate with a 75ish mm turbo. Sure it won't be working in traffic but for the cost of swapping turbo kits, imho you may as well go for a sizable upgrade if top end is what you're looking for.

 

All that said if you are only looking for a max of 550rwkw, maybe the gen2 gtx will suit you, but there won't be any headroom left.

 

It's worth remembering that this kind of power isn't really suitable for the street and that may influence your decision making.

 

Haha good luck 

[Slowxr6t]

So puffwagon, tell me how your stock turbo went with gtx wheel and .7 comp cover? Was it a 82mm wheel, give me lots of details please, I may follow your route

[Puffwagon]

It was a genuine gtx wheel into a non ported gt35r housing. There was more midrange and top end with only a little bit more lag. It pulled harder to 6000rpm where the stock turbo did not.

 

Lol it's coming back to me now. I used a silicone adapter for a while, to fit the stock crossover. It also had a stock catback too, with stock valve springs. I only changed the catback and springs after I went a bigger turbo. The adapter I used was a 4inch to 2.5inch with a 45 degree bend. Iirc it needed closer to 55 degrees but being a vacuum pipe, it held up at a funny angle.

 

I only did it this way cos the stock turbo failed and I had a spare "hardly used" chra in the shed.

 

It's not a huge gain by any means, but it is noticeable. You won't sh*t yourself when you drive it, but you should be ok with it if you haven't gone down that path before.

 

I never used e85 iirc, but on 98 with the very limited supporting mods, it would spin the whole way through second on 255 semi slicks, through the zf.

 

That's the best I can remember as it was a couple of years ago or more, but I think it's fairly accurate. It did make a good difference before supporting mods, but imo the supporting mods should be done at the same time, especially in regard to turbo intake.

 

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