Would it be safe to run the engine in the driveway up to 6200-6300 rpm(that is as high as Russ wants me to rev it)? I do have a 6500 chip in it as Russ recommended. I was thinking it would be nice to do it in the dark to see if any sparks were jumping. I have bumped up against the rev limiter a number of times so I know it will rev to 6500, if in fact the chip is doing what it is supposed to. When I have run up to the top of the rpm range, I have not been able to feel the drop off in HP. As a side note, my tach is way off when running up thru the gears, especially in first and second. Consequently, I don't pay much attention to it. The tach does seem to work normally if I'm not doing 0-60 or quarter mile kind of stuff. The problem with the tach is that it doesn't keep up. I can hit the rev limiter and the tach will show 3000 rpm.
Thanks again for all your help,
Art
quote:Originally posted by george pence:
from page 3quote:Originally posted by george pence:
...I would also not discount the older ignition coil, performance of coils does taper off with age & use, and aftermarket parts quite often do not have the longevity of oem parts. The MSD box could have a defect also. Ohming the spark plug wires would also be a good idea, especially the wire between the coil & distributor. You may want to monitor the voltage supply to the coil or ignition box while its being run on the dyno, the Pantera electrical system may simply just be dropping the voltage to the coil or MSD box as the current draw increases. A method to diagnose that issue is to install a direct jumper between the battery & ignition using a heavy gage (12 gage) length of wire with alligator clips on both ends. Ignition issues are also something that can be easily diagnosed on a dyno with an engine analyzer.
One test you can run is to rev the motor in the driveway & determine if the motor hits a brick wall under those conditions (unloaded) or only on the dyno....