RE: RE: Magnum engine "design flaw"

From: Ray Block (BPracing@wowway.com)
Date: Mon Aug 04 2008 - 18:43:07 EDT


> -----Original Message-----
> From: Bernd D. Ratsch
>
> It's no secret - putting a crossover tube on the fuel rail will help with
> the fuel issue - but just better control. The excessive lean condition
> claimed has yet to present itself every time I yank the heads on these
> things. However, the biggest issue causing head problems is the cooling
> system - causing the rear cylinder head cracks (always on #5,7,6,8).
> Drill,
> Tap, and put a crossover tube on the rear cooling passages to help
> circulate
> the coolant instead of building up the "hot spots".

Interestingly enough, Chrysler doesn't seem to recognize this as a
"problem". Some racers do add a coolant return (or crossover) to the rear
cooling passages (through the intake manifold), yet the only aftermarket
manifold to offer this is Professional Products in their "crosswind"
manifold. (carb only, though)
>
> The funny thing in their explanation (while there may be some truth to the
> lean condition they're claiming), the injector drivers would pick this
> up...along with the misfire monitor.

Only in OBDII systems though. Still, if this was truly an "issue", I and
others should be able to pick up some power if we "corrected" this....right?
LOL

Ray



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