Vortech Supercharged 1994 C4 tuning help
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Joined: Oct 2005
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From: Vancouver British Columbia
Vortech Supercharged 1994 C4 tuning help
Anyone with a Vortech Supercharger on a C4 than can offer tuning advise? Mine is runing rich and I am not certain how I can lean up the mixture.
Anyone know of a supercharger forum?
Anyone know of a supercharger forum?
Team Owner
Joined: Jan 2003
Posts: 20,315
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From: Summerland B.C. Canada
Originally Posted by rkubara
.Anyone know of a supercharger forum?
Melting Slicks
Joined: Dec 2000
Posts: 2,719
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From: Fremont Oh
Are you running an FMU ? what size injectors? how much boost are you running? How rich is too rich? What is your O2's reading ...
Give us as much info as you can there are many here that will try to help you...
Regards, and welcome...
Mo
Give us as much info as you can there are many here that will try to help you...
Regards, and welcome...
Mo
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Joined: Oct 2005
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From: Vancouver British Columbia
I just bought the car last week, not on the road yet. Never owned a Vette or supercharger. I am mechanically strong, but weak in these two areas.
Yes it has an FMU. Do not know anything about the injectors. It is running 40 lbs of fuel pressure at an idle, 50 at 2500 RPM. Do not know the O2 readings.
The car smells up the garage as soon as it is started. The bumper goes black above the resonators in very little time. My gut feeling, very rich when cold, but as I have not had it on the road yet, I am not certain of anything except a strong gut feeling.
I would like to know the ohm values for the O2 sensors and I will tests them?
Once on the road, I plan to take it to a muffler shop and have the cats tested, I think they are toast, the car has 96,000 and they look original. Thinking of putting on universal Magnalows, anyone have input on them?
Yes it has an FMU. Do not know anything about the injectors. It is running 40 lbs of fuel pressure at an idle, 50 at 2500 RPM. Do not know the O2 readings.
The car smells up the garage as soon as it is started. The bumper goes black above the resonators in very little time. My gut feeling, very rich when cold, but as I have not had it on the road yet, I am not certain of anything except a strong gut feeling.
I would like to know the ohm values for the O2 sensors and I will tests them?
Once on the road, I plan to take it to a muffler shop and have the cats tested, I think they are toast, the car has 96,000 and they look original. Thinking of putting on universal Magnalows, anyone have input on them?
Melting Slicks
Joined: Dec 2000
Posts: 2,719
Likes: 60
From: Fremont Oh
rkubara,
One of the best investments you can make would be some logging software...
With it you can monitor your O2's at WOT as well as around town... At WOT they should be in the 890-900 mv if you aren't running an intercooler... Also it will give you an indicaton of how much advance you are running and whether you are seeing any spark knock as well.
For the 94 Tunercat is probably the most popular.... Also PLX has a wide Band O2 that would be helpful getting you Air Fuel mixture correct.
Hopefully this helps some...
Mo
One of the best investments you can make would be some logging software...
With it you can monitor your O2's at WOT as well as around town... At WOT they should be in the 890-900 mv if you aren't running an intercooler... Also it will give you an indicaton of how much advance you are running and whether you are seeing any spark knock as well.
For the 94 Tunercat is probably the most popular.... Also PLX has a wide Band O2 that would be helpful getting you Air Fuel mixture correct.
Hopefully this helps some...
Mo
Melting Slicks
Joined: Jul 2004
Posts: 3,277
Likes: 32
From: Mission Viejo California
Also since you are using a fmu, you can change the step up ratio disc or buy the bleed off valve from vortech. Those will help you adjust you rate of gain under boost.
Datalogging software is a must. I've come a long way since I got some. I previously had a coolant temp sensor that was bad that gave me a rich condition. It was easily diagnosed once I hooked up the laptop.
For tuning I use tts datamaster. It's pretty easy to use. Heck, I started knowing nothing about this stuff and now I at least know the basics.
Datalogging software is a must. I've come a long way since I got some. I previously had a coolant temp sensor that was bad that gave me a rich condition. It was easily diagnosed once I hooked up the laptop.
For tuning I use tts datamaster. It's pretty easy to use. Heck, I started knowing nothing about this stuff and now I at least know the basics.
