i was just wondering if anyone has expermented with a turbox's standard boost controler and how good did it work?

I had one on my Shelby Daytona.  It will increase your boost.  They work pretty good.

Any more info?  I need one for my turbo sunbird.  Which by the way also has a T25.  :)

TurboXS is a decent MBC for the price. I can attest to them on numerous cars, as I've installed a TON of them. I did notice the TGP I have is much happier with an electornic boost control. Right now it has my Profec-B out of my now for sale Supra. I'll probably switch to the AEM EMS shortly, with a Greddy E-01 as backup(easier to control boost without going into the ECM settings).

Good luck with a boost controller on a TGP.  The stock chip only allows a little over 1psi over stock boost, and the Jeff M. chip only allows ~1.5psi over its 11.5psi.  So a boost controller doesn't do a whole lot.  I have modified my stock boost controller for more boost, and it made a huge difference, but I wouldn't spend money on a boost controller to raise boost on a TGP...the chips just won't let you.

Just my $.02.

Shawn

Quote from: dbtk2Good luck with a boost controller on a TGP.  The stock chip only allows a little over 1psi over stock boost, and the Jeff M. chip only allows ~1.5psi over its 11.5psi.  So a boost controller doesn't do a whole lot.  I have modified my stock boost controller for more boost, and it made a huge difference, but I wouldn't spend money on a boost controller to raise boost on a TGP...the chips just won't let you.

Just my $.02.

Shawn

the infinately unupgradeable TGP strikes again!!!

i've had awesome results with the $25 McMaster-Carr grainger valve MBC in my GTS; practically EVERYONE on the TD forum uses a grainger.  but unfortunately a g-valve won't to shit in a TGP without editing the chip :(
joshua

So with the top gun chip the max boost is about 13 PSI?

11.5 as listed above

Come on guys, you know better :lol: , there are limits to how much boost you can run safely(on ANY engine), and I don't mean adding octane I mean the stock T25 does good at around 240-260 hp at 11.5 to 12 psi but beyond that, getting too much heat generated to be safe, or even make more power, and too much backpressure as well.  And the next thing on your minds, then upgrade the turbo, please read beforehand all the posts on this topic, it's an old topic but results are being made by a few and I am sure those results will be posted here.  Think intercooler upgrade for something to keep things busy till then :) .

Jeff M

Quote from: CookiesSo with the top gun chip the max boost is about 13 PSI?

Yes, its right around 13psi.  However, you don't really want to run that much boost because of the reasons Jeff already listed, along with a few others.  Not to mention, it would be really hard to make it so it runs that 13psi in all weather conditions.  It doesn't take much difference in temperature to raise boost up above that fuel cut if you raise it up.  

Personally, I would just run the 11.5 and do other things to make the car faster.

Shawn

But....how do you cure boost cut off?  It feels like my TSTE isn't being allowed to hit as much boost as it likes.  I have the Jeff M TG 160 chip in it now, and when the boost gauge gets near the 15 psi mark, the engine starts to stuter and won't allow me to accelerate any harder (almost the same feeling as when you hit the governer on a rental car).  If I so much as take my foot off the pedal even a hair, the thing takes off like a bat out of hell again.  But this is really making it aggrevating/difficult to go WOT....cuz....basically...I can't.   :shock:

Quote from: malibuoldsbut unfortunately a g-valve won't to shit in a TGP without editing the chip :(

I gotta disagree here..  at least in my TGP, BOTH the stock chip and the TopGun chip had SIGNIFICANT boost lag programmed into them (the Stock chip of a much worse factor than the TopGun).  With the Grainger valve, boost comes on SO much quicker it's downright astonishing..  Your passengers will even notice.  EVEN at the same boost level.  But watch out cause you'll likely produce enough torque to smoke your transmission or make it have trouble shifting so be warned.

Quote from: 6000STE/AWDBut....how do you cure boost cut off?  It feels like my TSTE isn't being allowed to hit as much boost as it likes.  I have the Jeff M TG 160 chip in it now, and when the boost gauge gets near the 15 psi mark, the engine starts to stuter and won't allow me to accelerate any harder (almost the same feeling as when you hit the governer on a rental car).  If I so much as take my foot off the pedal even a hair, the thing takes off like a bat out of hell again.  But this is really making it aggrevating/difficult to go WOT....cuz....basically...I can't.   :shock:

You just gotta beleive us when we are telling you that the TGP stock Garrett T25 turbo is SO small that it cannot increase power on this motor past ~11 PSI!!  If you're trying to run 15 PSI it's actually SLOWER than 11 PSI, so you're only wasting your time and risking damage to your engine by continuing your quest for 15 PSI out of this turbo.  If you want 15 PSI, first get a significantly larger turbo, then tell us all how you fit it in the TGP without removing or melting anything and still being able to tilt the engine to access the rear spark plugs, and how you connected the oil/coolant lines plus the downpipe and the intercooler, and then you can worry about getting a chip that will allow 15 PSI :-)

When I finish my install, I'll do a full write up. I'm using the turbo I bought for my Supra, so I know it's meant to flow for the diplacement we have.

Also, these cars are MAP sensor equiped. There is a write up somewhere on putting a zenor diode on the signal line to the ECM that will help dial out fuel cut.

Quote from: TookyCatYou just gotta beleive us when we are telling you that the TGP stock Garrett T25 turbo is SO small that it cannot increase power on this motor past ~11 PSI!!  If you're trying to run 15 PSI it's actually SLOWER than 11 PSI, so you're only wasting your time and risking damage to your engine by continuing your quest for 15 PSI out of this turbo.

Oh, I'm on no such quest, my friend.  My only quest is to get this damn thing to allow me to gun it without issues.  Now I have yet to go through all the ordinary things that need to be done on TGP/TSTEs like tune-up, vacuum lines, oil return line, crank sensor, etc. (probably could use a new cat, too, but I'm waiting for a complete exhaust job this summer), but I don't know how much of that would effect what this car is doing at maximum boost.  And it was doing this when it was completely stock, too.  Only difference being it would nearly break your nose as you go from being pinned back in your seat to a sudden and abrupt meeting with the steering wheel as you hit fuel cut-off just as it reaches peak power.  Now it just does that stuttering/vibrating thing as I mentioned.  I just want the car to let me go WOT, what ever PSI of boost that may be.  I haven't even looked into any mods, yet (other then the Jeff M chip that's in there right now).  Just getting both my turbos cleaned up, running, and running consistant is my quest right now.