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hooked up a v2 s-trim in my 96 gt and i'm having a problem. at idle the gauge is showin 20 vac, and when i drive it or rev it up the gauge will only go to 0, no boost. nothing is wrong with the gauge so i'm having a vaccum problem or bypass valve problem but the valve seems to be working fine. tried hooking up vaccum lines every way i could and still nothing. anyone had any problems like this?? i'm all out of ideas.
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how high are you going into the rpm's? youll never see boost just reving the motor. you have to drive the car. and boost wont show unless your at WOT and above 3000rpms. also make sure the belt is tight. i put mine to 95ft/lbs
When the turbo spins, the bullsh*t ends
drove car wot to 5500rpm's in 1st, 2nd, 3rd, 4th. it seems like it actually bogs down around 3500rpms when i should start making boost. it could be belt slippage. but i dont think there is a way to tighten it up is there?
what do you have for an ignition system. its not uncommon for a sc car with a poor ignition to bog around 3500 because the spark is being blown out. what plugs are you running and what gap?
missed the fact that you have a 96. they use the factory belt dont they? if so you cant tighten the belt. i would just run a dayco polycog belt to make sure there is no slip. but if your taking it up to 5000rpms if the sc is slipping youd hear it. what did the gauge say when you went up that high in the rpms?
When the turbo spins, the bullsh*t ends
first off i know you dont make boost at idle. i dont make it when i'm driving is what i'm sayin. ignition is stock except for bigger wires and iridium plugs. does not use factory belt. needed it about 18 in. longer or so. belt is tight same as factory. even if it was poor ignition i should still get some boost.
yeah i know, thanks for shrinking it. ok, a little update on the car. it can't be a vaccum problem cuz i disconnected the bypass valve vacum line so it stayed shut. went out on the highway and the same thing happend. when vaccum gets to 0 around 3000 rpms, and when i should be making boost, there is a small jerk like the car is lacking something. it does a few small jerks after that like it's not having consistant power. i'm pretty sure it's not belt slippage cuz it doesn't make any noise. the only other thing i can think of is a fuel cut. sorry if i'm being a pest but if i can't figure it out tonight or tomorrow, i'm gonna take it to the shop and have them look at it (which i dont want to do). any ideas would be much appreciated. Thanks
i'd take the car to a shop and get them to look at it. how did you tune your car if you don't mind me asking? i hope you're not going to say a handheld. still though, you sure you have everything connected properly? your car doesn't even feel like it's going under boost, and when it does, it kind of does a little bump bump? i thought your car was pulling hard but just wasn't reading anything on the gauge. hrmmmmmm
car hasn't been tuned yet. vortech said it wasn't absolutly necessary but as soon as i get everything working properly i'm going to take it in and get it tuned. either way it should be making boost and it's pissin me off. and i doesn't pull at all, it seems like it actually backs off a little around 3k.
id first check your bypass valve(s), if you have it backwards you probably wont see boost. also, without a dyno tune youre car is gonna run really rich. for me when i got on the dyno with the handheld tune i had, my a/f ratio was completely messed up...so bad that it only pulled 209whp. i also had some issues with my vacuum line for the boost gauge, the line i used got kinked and leaked a bit. i spliced it into intake line behind the plenum and it works fine now. when checking for leaks, check that flex hose crap vortech uses, that will surely leak if not screw down tight enough.
96' GT: 01 s281e motor vortech s trim aftercooled
88' Lx convertible
96' hyundai elantra
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