toddk911

Yea, thats what I was hearing.

But how does the K27 work so well with the #6?

So I guess a MAF would make a huge difference????

J Chen

Same thoughts too Fast951. Do you know which
vendor this turbo came from Toddk ?

macnewma

From what I understand, the 60-1 housing is much larger than the K27.

John, when you say that backpressure will be too high, what effect does that have exactly? Is there an adverse effect in general or will it simply limit the potential of the 60-1? I guess I need to read Corky Bell's book.

Max

J Chen

I think what John is trying to say is that theres a compressor/turbine
mismatch. On top of that, the #6 hot housing itself is by itself restrictive.

toddk911

Lindsey.

"From what I understand, the 60-1 housing is much larger than the K27."

ok, didn't realize that. I will be getting MAF soon and have 3" exhaust. Hopefully that helps???? As I know a MAF really opens the flow up, especially for a bigger turbo.

I had a buddy here in town that had a Steve R chip/K27 package and then put a MAF on and it was a world of difference.

And it was not a big problem, I just made full boost a few hunder revs later then stock.

How much performance will there be now that the wheel is not clipped and the housing has been machined to fit it now??? Will it even be noticeable???

fast951

Backpressure, is the actual pressure between turbo and head. There should be a balance between intake pressure and exhaust pressure. It's not a 1:1 ratio. When the compressor ilarge and the turbine is restrictive (for the compressor), the backpressure gets out of control. Too high of backpressure exhaust gases make their way back into the combustion chamber (valve overlap time), this reduces perormance and creates detonation problems.

hosrom_951

There is a difference here:

The 60-1 turbocharger has a 4" inlet which would cause some problems installing. You said it was packed in a T04B then that sounds like a SFR Stage 3, though they use #8 and/or #10 turbin housings so things are getting confusing here and they used a 60-1 HIFI internals (?)

There is also a 60-1 HIFI turbocharger which has a 2.75" inlet, which fits w/o problems.

Running the #6 exhaust turbin into the 60-1 will work pretty good. BUT it is BETTER suited to the #8 hotside as mentioned regarding the backpressure.

Note: If you are running the 60-1 HIFI with the MAF, you should be able to get 1BAR at just a tad over 3,000rpm when fine tuned properly.

J Chen

The MAF & exhaust will only help marginally cause the bottlenet
is at the turbine/hot housing. I'm surprise that Lindsey did not
advice you about this.

toddk911

"There is also a 60-1 HIFI turbocharger which has a 2.75" inlet, which fits w/o problems."

Bingo This is what I have.

"Backpressure, is the actual pressure between turbo and head" So only porting the head would actually help? aside from a bigger hotside of course.

"I'm surprise that Lindsey did not advice you about this." ME TOO!!! And it's too late now.

macnewma

Thanks for the explanation John...I guess that is the black magic that you perform so well on your turbos

Max

toddk911

Belive me, I went ot John first, but he does not do rebuilds, only new turbo's outright. As I know he is the best on turbo specs and knowledge.

toddk911

What difference does the "HI FI" make?

toddk911

Never mind:

"(The 60-1 HI-FI will deliver approximately 90-95% of the flow capacity of the standard 60-1.)"

Andy

While I agree with John that the #6 has limitations, since you already have it, go try it, you may end up with a good street turbo. I have a k27/6 and I won't say it works well but it is better than stock and with a little more agressive boost and fuel it would probably support 310-320rwhp and 320-330rwtq without getting too crazy. Due to my current set-up I know that backpressure starts to rise alot at 5000rpms. This works pretty well as a daily driver as spool up is great but I wouldn't run it much on a track at high rpms due to the backpressure heat soaking the head, etc.

toddk911

Hey Andy! That makes me feel a little better. As this will be 90% street driven. Certainly not long periods of time at full boost and revs.