Quote:
Originally Posted by Forrest Nearing
the heat isn't going to hurt anything... it's 1400* EGT... the burn is so late, you're seeing a lot of heat at the turbine, but not nearly as much inside the chamber/on the piston
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This discussion probably belongs in it's own thread, but high EGT's during staging does cause problems. The way the Cummings head is designed, the heat from the exhaust port is directly exposed to the water curiculating past the exhaust valve seats that normally drops. Ever notice it's the same valve seat that drops? The one between the cylinders. The MLS gasket already channels a lot more water to the back of the block, to help out cylinder 5 and 6. Super heating the remaining water is not a good idea.
Keeping the EGT's down to around 800-900 while staging is a good idea. Now if Chis could initially make the injection late, and once the boost is up get rid of the late injection to cool the EGT's back down. That would be way cool! It would probably be easier to maintain a steady boost, if the advance was put back in.
Paul
Paul
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02 4x4 Auto Mach 6+'s, Drag Comp,Source Automotive Twins, Ultimate Transmission
05 2500 4x4 Auto 3.73 BBI 4's, Smarty Touch, Source Automotive Twins, F1 springs and Cam, Opie's bypass system, Mitusa, PPE Dual Fueler, Ultimate Transmission, Opie shafts,Isspro gauges
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