turbocharger upgrade question

[nynor]

my goals:

faster turbo spool-up (this is the MAIN goal).

approximately the same HP i have now, perhaps 250 hp.

longevity of the turbocharger.

hold 14 to 15 PSI boost to redline.

what i have:

1988 951 (non S)

k26/6

autothority stage II chips for turbo S, with the banjo bolt (and i really don't want to change this, as it works really nice, even though i don't have the S).

the current setup will run the boost up to about 14, maybe 15 PSI.

everything else is pretty much stock.

i do have a boost gauge and a FPR gauge.

again, i am not looking for 400HP at the wheels. i am looking for a modest 250 to 270 HP at the crank, with less turbo lag and holding the boost to redline.

thanks!

D/

[geno951]

Waste gate + Vitesse or Rogue Maf kit. Done.

Sent from my SM-N910V using Tapatalk

[fejjj]

^^^this^^^

Specifically the Rogue M tune now available via LR.

This kit along with a Tial WG will totally transform your car and provide a much more linear power curve.

If you upgrade the Tial 38 WG, I have a used set of adapter plates available that you will need so you can bolt up to your exhaust.

[nynor]

so the wastegate will create faster spool up and hold full boost to redline?

edit: so i took a look at this setup. the main thing i really do not like is that the dual port setup bypasses the "limp mode" of the KLR, as the CV is bypassed.

my thoughts are that turbochargers must have come a long way since 1988 and quicker spool up should be possible with a modern turbocharger.

perhaps the place to start is with a new, single port wastegate and see where that gets me.

2nd edit: after looking at it some more, i do think that getting a 'clubgate' from LR is the answer, along with one or two of their shims. being that the wastegate i have is most likely the original, it must be getting tired.

[fiily]

Originally Posted by fejjj

^^^this^^^

Specifically the Rogue M tune now available via LR.

This kit along with a Tial WG will totally transform your car and provide a much more linear power curve.

If you upgrade the Tial 38 WG, I have a used set of adapter plates available that you will need so you can bolt up to your exhaust.

When did LR start with Josh's stuff? I just checked I cannot find anything for Rogue Tuning's MAF on LR website..

[Rasta Monsta]

Faster spoolup could be achieved by ceramic coating the headers and crossover pipe. . .

[nynor]

i thought the headers were ceramic coated from the factory. is that not the case? i've also seen guys heat wrap the headers and all the pipes to the turbo to keep the gases hot.

[smudo]

Originally Posted by fiily

When did LR start with Josh's stuff? I just checked I cannot find anything for Rogue Tuning's MAF on LR website..

Here it is:

M-TUNE MAF KIT at LINDSEY RACING - Your Porsche Performance Parts Center

[fejjj]

so the wastegate will create faster spool up and hold full boost to redline?



edit: so i took a look at this setup. the main thing i really do not like is that the dual port setup bypasses the "limp mode" of the KLR, as the CV is bypassed.



my thoughts are that turbochargers must have come a long way since 1988 and quicker spool up should be possible with a modern turbocharger.



perhaps the place to start is with a new, single port wastegate and see where that gets me.



2nd edit: after looking at it some more, i do think that getting a 'clubgate' from LR is the answer, along with one or two of their shims. being that the wastegate i have is most likely the original, it must be getting tired.

No the WG will hold boost better.

The Rogue tuning M tune will give you a LOT better low and mid range torque which is really what you are after.

The power curve becomes much more linear.

He redesigned the fuel maps from 2D to 3D.

He also built overboost protection into the tune.

You really should go to his website and read about the M tune.

Hands down the best Mod I have done to my car!

[nynor]

Originally Posted by fejjj

No the WG will hold boost better.

The Rogue tuning M tune will give you a LOT better low and mid range torque which is really what you are after.

The power curve becomes much more linear.

He redesigned the fuel maps from 2D to 3D.

He also built overboost protection into the tune.

You really should go to his website and read about the M tune.

Hands down the best Mod I have done to my car!

okay, i see what you are saying.

[fejjj]

The other mod that will help your turbo spool sooner is a 3" turbo back exhaust. If you were able to drive my car, you couldn't get the money out of your pocket fast enough to do these mods.

[Freaky]

K27/6 and a Tial 38mm dual port WG, use the AEM electronic boost controller. Faster spool and boost beyond redline. But you'll also get more HP.

[fiily]

Originally Posted by smudo

Here it is:

M-TUNE MAF KIT at LINDSEY RACING - Your Porsche Performance Parts Center

Got it, thanks!

Should $$$ be spent on a bigger turbo or the MAF 1st?

[fejjj]

Rogue M Tune first.

[DannoXYZ]

M-tune first, then wastegate and EBC.

Existing K26/6 can get your 250-270bhp just fine. Just need to manage boost better. With wastegate+EBC, you can program in a boost curve of 25psi all the way to redline just fine. You'll only need 15-16psi to hit your target. Just can't do that with stock WG+CV combo. Then the M-tune lets you adjust fuel&spark to match the higher flow.

And it gives you the adjustability for future upgrades like turbo and MAF. Those are not needed at this time for your 250-270bhp target.

[guru944]

nynor,

Reducing flow restrictions/resistance to improve System Responses and Maximize efficiency. The net result will be a much quicker spool up, Greater fuel economy/efficiency & power delivery through out your operating rpm band. Engineering problem solving Perspective.

1) Output;3" Exhaust upgrade to reduce turbo spool-up back pressure and increase flow capacity.
2) Thru-put; Upgraded intercooler, Improve efficiency and through flow capacity by 18-22% (PM Me). Reduce Restrictions between turbo and Throttle body.
3) Input; Then Rogue MAF conversion for improved rpm response and efficiency in the front end.

Power will naturally follow and you can regulate that directly by your overall boost control. Manual or EBC.

That would be my approach.

[nynor]

Originally Posted by guru944

nynor,

Reducing flow restrictions/resistance to improve System Responses and Maximize efficiency. The net result will be a much quicker spool up, Greater fuel economy/efficiency & power delivery through out your operating rpm band. Engineering problem solving Perspective.

1) Output;3" Exhaust upgrade to reduce turbo spool-up back pressure and increase flow capacity.
2) Thru-put; Upgraded intercooler, Improve efficiency and through flow capacity by 18-22% (PM Me). Reduce Restrictions between turbo and Throttle body.
3) Input; Then Rogue MAF conversion for improved rpm response and efficiency in the front end.

Power will naturally follow and you can regulate that directly by your overall boost control. Manual or EBC.

That would be my approach.

you make it sound so reasonable!

i am going to start by replacing the wastegate, as i am sure it has age related issues.

i have a race exhaust, no cat, but i get tired of swapping it out every summer to pass emissions. it does allow the turbo to spool up much easier and sooner, however. i may get a high flow cat. converter installed and see how that works out.

an intercooler does sound interesting. i will pursue that, as well.

i am a bit nervous about the MAF setup, for a few reasons, but mainly because i have heard, anecdotally, that they have issues with running lean. and $1400 is going to be a really hard sell with the spouse. just saying.

[smudo]

Originally Posted by nynor

you make it sound so reasonable!

i am going to start by replacing the wastegate, as i am sure it has age related issues.

After I changed my original WG with new one, the difference in performance was quite noticeable as with original WG got at least 0.2 bar lower boost (compared to standard numbers) in whole RPM range.

[nynor]

Originally Posted by smudo

After I changed my original WG with new one, the difference in performance was quite noticeable as with original WG got at least 0.2 bar lower boost (compared to standard numbers) in whole RPM range.

right on.

anyone have thoughts on using LR's WG shims?

[fejjj]

Quote de smudo

After I changed my original WG with new one, the difference in performance was quite noticeable as with original WG got at least 0.2 bar lower boost (compared to standard numbers) in whole RPM range.

right on.



anyone have thoughts on using LR's WG shims?

I have a set of 2 unused LR shims you can have for $20 shipped if you decide you want to go that route.