standard turbo boost controlers

[dbtk2]

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.

That is the fuel cut on the topgun chip.  I think Jeff M decided the stock fuel cut was really stupid (how it abruptly shuts off all power), so he turned it into a sort of governor.  But, there is some reason why it is trying to get more than 13psi boost, and thast what you need to figure out.  I would replace the boost controller (since it is only like $7), and make sure the vacuum lines are hooked up properly, and make sure you're cat isn't somewhat plugged, and you should find the solution to your problem (I would think).  We were having the same problem with our 2 door TGP when we got it, and it turned out that someone had drilled a hole in the boost controller for more boost, but the hole was a little too big.  (of course then I took their idea, and just made the holes smaller, and I switch back and fourth for different weather conditions so I can get a lot of boost)

Shawn

[dbtk2]

but 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.

'

You are definately correct there.  When I put one of my modified boost controllers on my STE, the turbo will spool much quicker no doubt, but it doesn't help me any.  With my stock chip, and stock boost controller, I can still spin my tires enough for smoke to start rolling off of them, so having the turbo spool quicker does absolutely nothing for me, except allow me to make a larger smoke show.  Spinning your tires doesn't make your car go any faster, so I would rather it didn't spin the tires.  I know when I put a top-gun in the car its gonna be crazy how bad it smokes the tires, I don't think I'll need to use a modified boost controller to launch good.  I know it made a huge difference in our other TGP, so I would like to see what it does to my STE.  

Shawn

[maximage]

I think thats just a matter of figuring out how to get traction to the wheels. Dont the STE's use like 215's for tires? I know withtthe stock TGP Coupe tires being 245's, a set of sticky meats do wonders!

[dbtk2]

I think thats just a matter of figuring out how to get traction to the wheels. Dont the STE's use like 215's for tires? I know withtthe stock TGP Coupe tires being 245's, a set of sticky meats do wonders!

Yes, the STE's have 215's and the Coupes have 245's, but if I can SMOKE my 215's, I don't think I would have any problem spinning 245's pretty good, so it has plenty of power.  I will be honest, when the car was completely stock, it would only chirp the tires, but after doing a bit of exhaust work (no cat and straight through mufflers) it would spin the tires up to about 15mph, then when I put the K&N filter on the turbo, it will spin the tires for about 10 feet or so from a 20mph roll, and it will spin them up to about 25mph from a stop.  If you're gonna tell me that a little over 1" wider tires is gonna prevent me from spinning the tires, you're insane.

Besides, my dads TGP coupe with a topgun, K&N, and no cat will spin the tires from a 20mph roll also (only it does it a little better than my STE), and it does have some pretty sticky 245's, so I don't think the programmed turbo lag is really that bad.  But thats just my experience.

Shawn