DIRECT DRIVE 327

[dk9904]

Im new to airboating I have a 327ci set up for direct drive with no prop.
Is it OK to run a direct drive on this motor? What is the down side? What kind of prop should I run?

KEEP IN MIND IM ON A BUDGET.

THANKS!!

 

[Larry]

A friend of mine is running a narrow blade sensenich that is 68x38 on a 327. He is spinning this prop 3100rpm, a little noisy but runs dry well.

Larry

 

[Waterthunder]

Just being Frank with you a 327 is about the worst combo you can run on a direct drive SB Chevy next to a 283. The motor has no torque at all it’s a high RPM motor. 327’s utilize a 4.00 bore with a 3.250 stroke. However I know you’re on a budget and any boat is better than no boat at all. My first boat was a 90HP Lycoming. You can set that boat up to run good but I recommend a short Warp Drive for three reasons. (1)Used Warp Drives are cheap to buy. (2) You can turn the motor up higher RPM’s with a short Warp Drive and get it more into a 327’s power range. (3) since your motor makes little torque you want a prop that doesn’t push much until higher RPM’s see the prop will act like a loose high stall torque converter. If you run a stock converter on a 327 in a car it’s a pig but put in a high stall converter that slips and let’s the motor rev up that little 327 becomes a beast that can run with a big block. Also if you run a short Warp Drive set the motor as low as possible in your hull this will drastically improve how your boat handles, turns, responds and runs.

 

[Anonymous]

All is not lost, you can always bore & stroke the 327 out to 383 later for a great airboat motor