vortech supercharger problem, no boost
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1st Gear Member
Joined: Sep 2005
Posts: 127
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vortech supercharger problem, no boost
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.
6th Gear Member
Joined: May 2004
Posts: 9,092
From: las vegas, nv
RE: vortech supercharger problem, no boost
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
Retired MF Moderator
Joined: Aug 2004
Posts: 14,891
RE: vortech supercharger problem, no boost
yeah, you won't see anything happen just rev'ing at idle. if you're too busy concentrating on not crashing while going under WOT, i think you'd be able to tell if you're boosting or not. 
Thread Starter
1st Gear Member
Joined: Sep 2005
Posts: 127
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RE: vortech supercharger problem, no boost
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?
Belt is 113 in 6 rib (btw). same as vortech kit.
Belt is 113 in 6 rib (btw). same as vortech kit.
5th Gear Member
Joined: Mar 2005
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RE: vortech supercharger problem, no boost
you wont see boost just reving the car. hear is a video to prove it. http://videos.streetfire.net/search/...f219eed9b0.htm
6th Gear Member
Joined: May 2004
Posts: 9,092
From: las vegas, nv
RE: vortech supercharger problem, no boost
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?
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?
Thread Starter
1st Gear Member
Joined: Sep 2005
Posts: 127
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RE: vortech supercharger problem, no boost
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.