How do you know its too rich? You must dyno at a dynojet facility with a wide band 02. Anything else is wasting time and money.
The VEC-1 needs to be disconnected. The air fuel meter can stay on but the unit takes too long to reprogram the computer after settings are changed and you may end up damaging something. It takes several key-strokes to see a change made on the vec-1 even though you may hear and feel that the motor is running different. I have spent dozens of dyno runs testing this device as a means to retard the timing for nitrous. Problem is that you can't just reset the dials and get an instant change in actual settings, we saw that it took several start and shut off sequences before changes in a/f were noted. This is not acceptable for adjusting "on the fly" to use nitrous. This is not to take anything away from this device, its just not perfect for this situation.
You are correct, your numbers are down from most, but not bad. The average NGP system on a car with good headers and exhaust will make about 640 RWHP @ 800+ RWTQ. Its not the system, it is simple jetting and liquids under pressure. You have other issues. You mentioned on another thread about a backfire and changing plugs. I suggest some more investigation into these things.
On a final note, are you using stock gears? Higher numerical gears have been known to skew dyno numbers down a bit. Please feel free to email me anytime with questions.
Tom
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Http://btrviper.com
352-690-9600
1997 GTS, BTR 750 SS
9.92 @ 143 MPH
776 RWHP @ 954 RWTQ
All for less than $ 20K Installed
<FONT COLOR="#ff0000" SIZE="1" FACE="Verdana, Arial">This message has been edited by Tom Welch on 12-05-2002 at 07:40 PM</font>