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any grainger valved TGP's out there?


Guest TurboSedan

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Guest TurboSedan

anyone here running a grainger valve for boost control on a TGP?

 

just wondering what kind of boost you were running, how it works etc. considering how well they work on my turbo dodge (and my brother's TD's), i am definately planning on running a grainger valve on my TGP engine. it seems so simple w/ a G-valve, but at the same time i want to experiment with chip tuning and wonder if i would be better off controlling boost thru the memcal, and not pneumatically like a grainger valve :?: :?: i'm sure it will probably be quite awhile before i dare run my own chip on a 'good' engine......

 

today i installed a lower IC hose with a 1g DSM BOV onto my Lebaron GTS, and then installed a grainger valve off of a McMaster-Carr manifold distribution block that i installed onto the intake manifold. this distribution block has several ports for boost gauge, MAP sensor etc. i drove around in the car and frequently tested how the boost felt (w/o a gauge), and went up until i hit overboost cut-out at low RPM in heavy load, at which time i turned it down until no over-boost cutout. my GTS is hella fast now! :) holy crap! altho, i previously had full manifold pressure going to the wastegate so obviously there was alot of room for improvement.

joshua

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The stock chip will cut fuel at only 1.5psi over stock (9psi), and a TopGun chip will do the same. You have to get a custom chip for it to do much good. However, on my STE I drilled a hole in my boost controller so that it would leak vacuum, and now it gets ~8.5psi, and I can feel the difference so it helped a little. I have another boost controller with a bigger hole in it, but I hit the fuel cut on cold days with that one, so I only put it on for warm days. But, 1.5psi doesn't do much, so for most it wouldn't be worth it.

 

Shawn

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Guest TurboSedan

good to know that, thanks for the info. i suppose i could get an adjustable overboost eliminator (zener diode between MAP & ECM), but i would still have to find some way to add fuel. i wonder if an alcohol injection kit would add enough fuel for 4 more psi over stock (13.5 psi), or would i have to plumb in a 7th injector?

joshua

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with them stock injectors, your not gunna get over about 11#s, so id start off with swapping them out. a 7th injector isnt a bad idea, but im not sure how ya would do it on our motors. Good luck and keep us updated.

 

-Jeff

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I can tell you from experience that it can run 16#'s on stock (Well, stock size :wink:, I have 3800S2 injectors in Black Sunshine) The biggest problem w/ that much boost is there is no timing for it, and because the computer doesn't know what to do, it's not gonna do you any good to get up there. I just happen to have an overboost problem (If you wanna call it that :twisted: ) I can feather the throttle and hold ~15-16 psi. (YES, feather, it sucks my ass) God himself only knows what kind of boost I would hit, if I eliminated my boost fuel cut. I would not suggest it. If you're gonna program yourself, you can go as high as you want, just gotta give it fuel, and timing.

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