First off I did say about FMUs
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though not always ideal.



There is nothing wrong with FMUs, they are not the best, but there is allways something better. A guy with a tweecer or tuner is also not the best.

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The fuel injectors spray pattern is also severely degraded causing poor fuel atomization and more erratic A/F ratios



This is debatable, I dont have the equipment to test spray pattern myself, what did you use? MM&FF will be testing just that next month, they plan on higher pressure IMPROVING it. So we will pick that discussion up next month. Im interested in seeing the results.

Oh to add, you generalized Injectors...which is silly. Disc style has a harder time with pressure(it distorts above 65PSI), but pintle style are fine with it, from what ive learned, and from conversing with techs at aeromotive(the fuel guys)

Also if you think a mail order chip is safer than an FMU, then we can end this discussion right here lol. Engines die from mail order chips. I actually ignored my own advice on mail order chips and nearly damaged my Lightnings motor.

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Seriously over pressurizing the fuel system and fuel rail is also just asking for early failure and surprise leaks.



I cant argue with you on that, im new to contours. I only have experience with LT-1 and 5.0 fuel systems, both of which must have superior lines/fittings to the leaking contours lol .

I have NEVER had one leak from higher pressure nor seen one. Of course you cant just put infinit pressure into them, but I had one friend running 100PSI, and he never had a problem.

You are indeed right about tricking the comp with a calibrated Meter, definately not ideal, I didnt want to advise him to buy a 550 dollar tweecer(and input the chart) and a 400 dollar Wide band, which is superior no doubt. Just more expensive.

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Throwing in your "big numbers" does nothing for your credibility when you can't back up why you are stating these things as good ways to "not fix the problem" but just "patch" it.



Er yeah...Having a high horsepower, blown(17#s! with hyper pistons!) FMU, with a calibated Meter(3 steps above stock)high fuel pressured car doesnt give me any credit in defending that type of setup...er what does then? Oh and my drivability is fine.

I was only trying to help him, not start a debate over something that is impossible to prove 100% either way due to cost versus effect. I gave him cheaper options, I see you run a tweecer, which is probably what you recommend. It also is a great way to handle tuning, but also not the best. The line in cost versus effect is up to the person. DFI with a professional tuner, on a dyno, blows a tweecer out of the water.(oh and the new superchips tuner is supposed to be better also, not released yet, more tunability that is, not better)

Oh and thank you for the WOT information, I honestly didnt know that. Since it meets air to fuel, what does it aim for?

Im going to assume you run a performance shop by the way you talked down to me lol. Since you obviously have first hand experience in leaking fuel lines in the contour, what area is prone to leak, this has me concerned about running a dry nitrous kit on mine.



Last edited by SilverSVT98; 10/19/03 08:02 AM.
1993 SVT Cobra, Vortech blown, 11.1@133MPH Street Driven 2000 SVT Lightning 1998 SVT Contour