Cigarette Cafe props
 

Recently upgraded 540 Bulldogs in 1994, Cig Cafe with 1.50 Bravos. Went with CMI sweepers, Dart Pro-1 aluminum heads, roller cams, and Crane ignition boxes. Running Bravo 1 four blades, 26 pitch labbed by John Janaky. Gained 500 rpm and tachs read 5500 rpm. Full fuel tanks and 5 people GPS reads 76.2 mph. One person and 3/4 tanks 78.2 mph. Will labbed 28's produce better performance or should I be happy with where I am at?

Re: Cigarette Cafe props
 

That will depend on where your peak torque and HP are at. I would think with what you've described as far as the engines that you are about right where you should be.

WOT on the Bulldogs was 5200rpms and I would think your mods gave some more hp in the higher rpms. I don't think that you would want to spin it much less than where you are. You could be making enough torque though that you could spin a bigger prop. Only testing will tell without a dyno sheet and then testing might still be needed.

Re: Cigarette Cafe props
 

I agree with Griff. Can you give us some specifics on the motors, such as the RPM at which the peak torque and HP are produced, please. I have calculated your slip at 12% which is in the normal range. So key is hitting your peak HP at this point.

Julie

Re: Cigarette Cafe props
 

The 540's were not dynoed. I guess the only true way to tell will be to try some 28 pitch props???

Re: Cigarette Cafe props
 

Depending on the recipe you have on the 26's, Labbed 28's may produce higher top end and cruise speeds. I agree with everyone else, a dyno sheet would help. The Bulldogs actually ran great all the way to 5400 rpm. This being said and knowing what those props most likely look like, I believe the 28's would help you to achieve bigger numbers.

We have test 28 box stockers to get a baseline if you wish to try them.