[DeTomaso] Intake Reversion

[eb0711 at kolumbus.fi]

It could also be transition circuit of the carb going lean before main 
boosters kick in. Not much you can do without changeable pills for air 
bleeds and fuel restrictors (which are possible to make by yourself as 
well). Good wideband lamda would be your friend, but trying someone 
else's carby could help you troubleshoot.

5/2/2013 8:50 AM, JDeRyke at aol.com kirjoitti:
> Reversion is normally found with very strong pulsations from IR-mounted
> carbs like quadruple Webers, not Holley 4bbls. It causes a visible cloud of air
> & fuel to appear 6" or so above the carb throats at a critical rpm. Exhaust
> reversion is harder to diagnose but is normally a low rpm quirk. The
> port-restrictors you speak of can be used in both intake and exhaust, but the
> effect of intake stuffers is usually to sharpen up the midrange and utterly
> torpedo the top end. Exhaust stuffers are less noticable and work best at higher
> rpms. Neither will likely fix the engine problems you mention. Simply going
> lean might do what you describe. What kind of "750 Holley" is this- a
> vac-sec or a DP? You may need a tuner-Holley for that beast; an out-of-the-box
> carb isn't likely to work very well unless you get luckier than I ever did.
> It's also very hard to separate ignition and fuel problems 'cause they give
> identical symptoms.
> As a pure guess, I'll go with JT on this: some sort of carb problem-
> possibly a blown or wrong range power valve. I'd try another Holley and maybe
> different plug wires, too. Good luck- J Deryke
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