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Old 06-18-2011, 07:01 PM   #1
paintball1
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Default new car 2001 cobra vortech supercharger running lean?

Just bought a 2001 Cobra with 90K and a Vortech Supercharger . he had all paper work showing rrhp and how it was a nice safe tune. car only makes 6psi. There is a air fule raito gauge it goes from 11 to 12 on wot, to 14 and always moves. i really don't know what a good area is. i did notice when i push the key forward but dont start the car it flashes 20.0 and when im going about 65 to 70 and let off the gas and just coast it goes to 20.0 and flashes then goes away. i just want to make sure its safe to drive. it has a sct tune and i have hand held also. thanks!
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Old 06-18-2011, 07:49 PM   #2
Blackvenom01
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alright so im sure you have the basics of an a/f guage meaning it monitors the air and fuel going through your exhaust....the numbers you need to be worried about are when you are at WOT specially at the higher rpms...ideally a perfect a/f is 11.3-11.5 for a supercharged car and for other is round 12...so it sounds like to me that your air fuel is perfect...

idle speed doesnt really matter cause it doesnt give you an accurate reading but it can be up in the 14's and not hurt anythng cause its idle...

as for when it goes to 20 then blank thats when your car does whats called lean pops and thats just your gas buring off and popping but not enough air flow to measure your air fuel cause there really isnt any so it does sound ok

now from my personal experience when i baught my car i got the sheets also and said it was safe and all but i didnt trust it and i took it to my dyno guy and found out that it was dumping fuel into my cylinders so bad that i had to change my oil to get the gas out..
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Old 06-18-2011, 11:26 PM   #3
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Thanks my numbers are perfect!
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Old 06-19-2011, 03:13 AM   #4
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also dont you think 5 psi is pretty low boost. i didn't know vortech had a pulley that big.
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Old 06-19-2011, 07:09 AM   #5
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ya your car looks like its running real good and ya that does seem alittle low but like you said i dont know much bout vortech you could prolly bump it up to like 9 and maybe 11 if its intercooled and get yourself a healthy chunk more of hp
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Old 06-19-2011, 09:47 AM   #6
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I assume you are on the stock engine, that is why it is lower. Our engines are not forged like the 03/04's are. Start bumping it up and risk blowing the motor.
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Old 06-19-2011, 11:54 AM   #7
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yeahh, i looked and it says 6 rib pulley ? also i checked the oil and its in the middle of max and full are the 32 valves supposed to be to the max or in the middle? he told me it takes 6.5 to 7.5 quarts
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Old 06-19-2011, 12:09 PM   #8
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all that sounds good too!!
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Old 06-19-2011, 05:33 PM   #9
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Says it has 3.34 pulley >?
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Old 06-19-2011, 05:33 PM
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1994, 2001, blower, car, cobra, exhaust, gas, lean, mustang, nasvt, running, safe, supercharger, tune, vortech, votech

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