Need Opinion on Turbo setups

[gyfer]

There's only 3 major options for controlling your "non-stock" fuel system.

1. Standalone2. JWT ECU3. Piggy system ( S-AFC, E-manage, HKS... etc )

The rest is very much answered. Hope this help.

[WDRacing]

What exactly are you wanting to do thats better?? Cause your going to need a standalone or a new ECU just to install your next turbine kit.

WD

[SHiFT]

how much better do you want it than a stage 1? It sounds like you'll need to replace your pistons this time around if you want more power, its possible to go higher boost on stock pistons but I'd do it just so I wouldn't have to worry about blowing my engine up.

[TurboKA37]

id go with a piggyback such as the s-afc II cause the jwt retunes come a little rich. i dont kno if it being a bit rich would cause this but a s-afc would allow u to better tune ur set-up anyway

[C-Kwik]

It can, but I would run a JWT over even the E-Manage I run now. I was planning to eventually go to a JWT set-up while retaining the E-Manage only for fine tuning. I'd venture to guess your idle and stalling problems were a result of the BOV recirculation being routed at a poor angle.

Either that, or it's possible the BOV was adjusted incorrectly.

[TurboKA37]

yes that will work

[C-Kwik]

I've heard of problems with the F-Max recirculation before. There was a website a guy name Marty King did a full write-up on this in and he had the F-Max kit. I don't know if the website is still around. But he basically goes to explain that if you have the recirc connection angled so that the air will be directed at the turbo, the MAF will see less turbulence and should not have the stalling problems. Those that had this problem and used this solution have had no problems since.

IIRC, to properly adjust it, you close the valve at idle just about all the way. You really dont want it to be open anyways, since air will escape when boosting. The you close the throttle and the manifold sees vacuum, the BOV signal line will also see vacuum. This vacuum and the pressure in the intake is what opens the BOV. You do not want it to be open at idle. Maybe a hair, but you can certainly adjust it until the idle problems are gone and the BOV should still function correctly. Just don't tighten it more than necessary otherwise it will allow more surge than necessary.

[C-Kwik]

uhh? then why are you opening it?

[C-Kwik]

Depends. Did they see it with an open BOV? You don't want it open at idle unless you are recirculating otherwise the MAF reading will be off. You should be able to get away with it when recirculating as it should close up under boost.

If you are having problems with an open BOV and having it cracked open, erratic idle can be from an incorrect MAF reading. If you attach the recirculation hose at this point without making adjustments, does it change the idle any?

[WDRacing]

can you plug the BOV entirely and see if the problem goes away. Cause it really does sound like a BOV problem. But your MAF being so close to the turbine could also be a problem.

WD

[TomsMR2]

ditching your entire setup for another seems like the most UNeconomical way. you're setup pretty good right now.. id check EVERYTHING possible for problems.. i agree on the bov thing, it sounds like the classic bov troubles. check/recheck.. then if you want more tuning, go s-afc ONTOP of the jwt retune. it'll be better than stock+injectors+safc.. you'll be cutting the injectors down less.

[C-Kwik]

Well both have their downsides as far as this is concerned. A top-mount rev-hard is certainly not easy to work with. And last I heard, the F-Max required no cutting to make it fit. The Nsport and XS kits both require some cutting. The XS probably requires more since the cold pipe comes back up the same side as the hot pipe. It's far less of hassle to retain the FMax kit, and modify the piping as you see fit. The recirculation problem is a fairly easy fix. And it wouldn't be hard to reclock the turbo and have someone fabricate a new hotpipe. Perhaps run it through the existing hole on the side of the rail like the XS and NSport kits and that would leave you free reign to route the pre-turbo intake however you want. Even as a cold-air system like NSport.