too much pressure

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Jul 21, 2003 | 03:35 PM

denscor

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From: West Virginia

too much pressure

First of all I'm new to forced air.I have a 2001 Corvette coupe.I put a ATI procharger (p-1sc-1)with 7psi diablio sport did the custom tuning (withthe help from James at runnin with the devil)too the car to the track it have brownish red smoke out the back when the car was at around 5500rpms it also ran slower with the supercharger on it. took plugs out they had same brownish red tint.Took the car to a dyno had the hood open when the car got to 5500rpms it blow the plastic tube that is at throttle body to maf,thought it was loose at first so I tighted it up the plastic tube blow off again in the nexted pull. The surge valve is hooked up to brake booster as the instruction from ATI.Any help would be great!!

Jul 21, 2003 | 03:46 PM

rodent

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From: Highlands Ranch, CO

Re: too much pressure

Brownish red tint... are you running an octane booster? That will do that. The plugs should have a light brown tint to them.

Jul 21, 2003 | 08:27 PM

Got Me SOM

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From: Orlando, Florida

Re: too much pressure

hmm brownish red smoke..
What was your air fuel ratio at? Did you go to set of colder spark plugs?

If no one answers you here, talk to tech support at ATI.

Let us know what the problem was.

Jul 21, 2003 | 09:12 PM

denscor

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From: West Virginia

Re: too much pressure

yes i used a octane booster,ATI said they had never heard of the problem.I'm using ngk tr6 gapped at 35.a/f ratio was 14.4 all the way though the runs do with a wide band.

Jul 21, 2003 | 10:04 PM

Mike00FRC

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From: Pottstown, PA

Re: too much pressure

14.4

Thats really lean... you need to get that thing tuned or you'll pop a piston

Jul 21, 2003 | 10:06 PM

StalkerLS1

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From: Jacksonville

Re: too much pressure

Quote:

yes i used a octane booster,ATI said they had never heard of the problem.I'm using ngk tr6 gapped at 35.a/f ratio was 14.4 all the way though the runs do with a wide band.

Unless your looking to blow up your engine.. The first order of business it to FIRE your tuner!. he obviously doesn't know that the A/F on a FI car should be 11.5 - 12.5:1 max. 14.4:1 is way too lean for an FI application IMHO.

Jul 21, 2003 | 10:53 PM

rodent

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From: Highlands Ranch, CO

Re: too much pressure

Quote:

yes i used a octane booster,ATI said they had never heard of the problem.I'm using ngk tr6 gapped at 35.a/f ratio was 14.4 all the way though the runs do with a wide band.

From past postings.. bottom line says to stay away from all octane boosters as they can harm the motor and O2 sensors in time. Besides that, they don't work. Lets say you put in the NOS racing brand which should raise your octane 4-7 points. Well if you put 93 octane in, then you'll have 93.4 to 93.7. Its a rip! You're better off getting some good racing gas (100 unleaded) and mix it with pump gas. Don't to the toulene or xylene mixes either.

Like the others said, you're running too lean. Get that fixed ASAP!