Folks,

Have a Satellite with the following specs, what is a good guess for RPMs you DON'T wanna exceed while cruising long distance????? Does about 3500 rpm at 70 mph.......thanks, BAM

Here are the specs:

440 bored .30 over.
Edelbrock Aluminum Cylinder heads that were ported and polished.
SRP Forged Pistons. 10 to 1 compression.
Hooker Super Comp Headers 2"
Holley 750 4 barrel carb with electronic choke and vacuum secondaries
Weiland duel plane intake
Comp Cams hydraulic cam Intake 241, Exhaust 247 and .545 lift.

727 Torque flight transmission with a reverse pattern Cheetah manual shift kit
Hughs 2500 torque converter
8 3/4" rear Sure Grip (741)
3.91 gear ratio
MSD Ignition, distributor, wires and coil.

You won't hurt anything spinning your 440 that high, just more noisy and harder on fuel. I don't like to spin motors that high while at a steady cruise, which is why I'm putting together an overdrive trans so I can have a steeper rear end ratio and still cruise at a reasonable rpm.

I'd use a 750DP. no difference in MPG's just performace when they are tuned right. Sounds like a good set-up but keep in mind you'll need more stall to make it work right. I'd guess at least 3000. If you want to keep that stall you might have to drop down to the 500-510 side of town on the cam.

Back in the days before OD they drove all the time in that range as did the trucks.

I used to make a 2 hour cruise each way every other week at 4000 no problems. as long as the oil pressure says above 50 (mine was 75 dead hot) and the temps stay below 210 what can it hurt??

what year is the car? if 68 or newer,You can keep the 391's and go to a taller tire....and get lower rpm's at the same speeds...I run 410's in My bee and have a 29 inch tire....runs like I had 355's on a 26 inch tire....3500 is really no biggie at 70...the motor will run alot higher

thanks all, it's a 1966......

BAM