Supercharged LT1 missin up hi
07-11-2011, 09:08 PM
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Supercharged LT1 missin up hi hey guys im new to this site but i always look through for info finally decided to join up. I have a 97 z28 with a v-1 supercharger. Im running at 10 psi. Car is missing in the higher RPM range Cant get over 5200. Changing Cap and rotor (MSD) and Wires (Taylor 8.2mm) as well as the fuel filter this weekend. Did plugs last week (delco platinums). I'd imagine my issue is ignition because she really runs horribly on humid days but i figured I'd ask around for any other suggestions. Also gonna change CPS while cap its apart to play it safe.
07-11-2011, 09:43 PM
#4
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Delco platinums and 10psi?? your on the edge with those, go get some ngk tr6's, gap them at 28k. How sure are you that its a miss and it's not breaking up, do you have tuning capabilities? if so give it 2 full points of enrichment in your % change table from about 4800 on up. also pull 2* of timing in the 100kpa tables from 4800 on up, assuming your pump n injectors can keep up that should rule out it going lean, but your on thin ice with it being blown. you really need to figure this out before you hurt something. Take your belt off or wipe the pulley, if theirs black dust it's probly slipping which you might mistake for a miss, or you could just take the belt off and see if it does it, that would mean breaking up or belt slip.
07-11-2011, 09:51 PM
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the car was tuned last spring i do not have tuning capabilities myself... def not breaking up. If i run the car at night when its cool and the humidity is out it runs fine
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07-11-2011, 10:07 PM
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well like i said the car runs fine at night. no miss or anything. Its been humid as hell over here in northern jersey the past week or so and that is when she started acting all funky which is why im leaning towards an ignition issue. i guess after full tune up ill have to get it on a computer. it just sucks cuz the closest shop is two hours away.
