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What's the difference...

grant

grant

Well-known member
Duece,

The PE 150 is rated at 150hp at 1800 rpm I think....produces more hp at rpms reached in airboat use.

Grant
 
my PE150 tag says it's rated at 185 hp at 1800 I believe. the difference to my understanding is the cylinders the 470 are domed and have dual plugs. 470 jugs will bolt straight on but 520 you would have to bore the case
 
There is no O-470 GPU. There is a PE-150 GPU. Some folks have added aircraft cylinders, some are O-470 cylinders and some are O-520s etc.

The PE-150 is rated around 160-180 HP and the O-470 that was in my old Skylane was 230 HP with a carb.

So, a PE-150 with the right O-470 cylinders will make a bit more HP, but not likely what the aircraft version O-470 does unless ya do a piston and cam swap out as well.

When it comes to parts engines, theres all manner of mix & match stuff out there. The only limit to what ya can bolt together is ones imagination and machine shop skills it seems. It all comes in dollars.

Scotty
 
I had a PE-90, it was 150 H.P. after a carburator change and advancing the timing. Before that it was only 118 H.P. A lot of people call the PE-150 a 220. But it is only a 185H.P. It is easy to get 220 out of them with another mag and different pistons.
Chester at J&C has a lot of info on the GPU's.
 
P E packette engine 150 hp 6cyl opposed cylinder 471 cubic inch engine .That's the way i understood it .Never knew what compression stock pistons were though . Many possibility's with that engine.
 
actual the ground power (PE150) pistons are the same Diameter as the 470 pistons but the GPU position's are dished making less compression and the 470's are domed with make higher compression and more HP anyway I thought that was a interesting fact
 
GPU's actually use the same pistons as the E-185 and E-225 continentals. The compression is about 7.5 to 1 and the GPU was an E-185 design modified to ground support around 1952.

Larry
 
When O-470 or IO-470 cylinders are used on the PE-150, why are the pistons milled or cut down? Can't you just use the pistons that come with the O-470 cylinders without cutting them down?
 
Des Moines Boater,

Thats what I used in my PE 90 stock o470 "R" pistons...works well!

Grant
 
Thanks Grant. I have a full set of IO-470 cylinders, pistons, pins and all. I thought in the future I could just install those the way they are and redo the intake and exhaust and be ready to go. Right now I'm very pleased with the single mag. That PE-150 is more engine than I expected. I'd sure like to get one of those Q 3 blade props for it sometime and make it even quieter than it is.
 
the difference between the full domes and those that are milled down a little is pump gas . vs, av gas... I CAN run 93 with cut domed piistons ...GOTTA be carfull
 
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