[Verne_Frantz]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: novadude</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Verne_Frantz</div><div class="ubbcode-body">I experienced a direct comparison with both a stock 2x4 409 and a stock L-78 in the same car with exactly the same set-up on the car. The ONLY difference was the L-78 ran a flex fan; the 409 ran the stock clutch fan. I had no problem shifting the L-78 at 6500 but I was more careful with the 409. 5800 shifts.
Best times:
L-78: 13.17
409: 13.31

Verne [img]<<GRAEMLIN_URL>>/flag.gif[/img] </div></div>

Cool. I always wondered about this. Why only 5800 rpm with the 409? Were they fragile, or did they just stop making power up top? </div></div>

They make good power over 6000 but I was being careful. Pistons weigh almost 2 lbs each! Good blocks are hard to come by.

Verne [img]<<GRAEMLIN_URL>>/scholar.gif[/img]