The newest drag racer gears up!

[YENKO DEUCE REGISTRY]

No guessing? Not even Sammy? [img]<<GRAEMLIN_URL>>/grin.gif[/img]

BTW, we found a new way to lose - spin the tires so hard that you kill the reaction time [img]<<GRAEMLIN_URL>>/mad.gif[/img] The red line is engine RPM, the gray line is the jack shaft RPM (think drive shaft). The gray line should be a perfectly even arc from 0-6500'ish, but when the tires are blown off the line will jump sharply and then come back down when the tires hook.

In less than 4 inches, the jack shaft speed was over 1,000 RPM - absolutely killing his light and the run. It took a while for him (us) to get over this one. This is after moving from the typical 6.0 rear gear to a 4.55, and then to a 4.33 with 6 #'s of air and treated/wrapped tires! Bummer! [img]<<GRAEMLIN_URL>>/frown.gif[/img]



Oh, the engine RPM spikes to ~7,500 at the hit, and then the clutch system 'shifts' at a peak of ~8,100 RPM (that's the red vertical line) - and these are relatively low RPM's! Our previous engine like to shift at 8,500 and then go through the stripe at 8,500+! When a rod goes, it will really 'window' the block!