Found Engine

[Allen Sutphin 705]

Well, got smiled upon again! Found an HKS with 80 hrs on it for a good price for the Fox. Hopefully make the trip this Tues to get it. Should be OK for me since I don't wear designer jeans. (you know, the high dollar brand Lardache.) 

[TJay 1041]

I don't know that model 2 looks high dollar fit and finish to me.

[Allen Sutphin 705]

Heading out tonight on another road trip (thought they were over) to pick up the HKS. He wants me to hear it run before I buy it. Evidently he is impressed with the way it runs and sounds. I am getting too old for this!

[Allen Sutphin 705]

Well, heard it start easy and run smooth so its in the barn till I get time to go over it. 85 hrs TT and ser# is the 1000 TBO engine. He was running a 3 blade 72" Powerfin prop on it.  A lot of componets to find a place to put them, preferably on the cool side of the firewall. So we start engineering again! Still don't know what the gear ratio is, its not stamped anywhere.

[1avidflyer 1983]

It will be either 2.58 -1 or 3.47-1  Pull the plugs and pull it over and count the rotations of engine and prop.  I'm guessing it's a 3.47 with that much prop on it.  It will be interesting to see how it performs once it's all done.  I do think it will work out and probably better then the 55 HP Hirth.  JImChuk

[Allen Sutphin 705]

I may have to change the ratio get a little faster prop speed.  Or go to a different prop. And modify the exhaust to fit. Normal stuff. Its been done before so I know it can be done.

Edited 10 Jun 2020 by Allen Sutphin

[ChrisBolkan 130]

I like the HKS. Mike Ricketts has had a ton of fun with his. I think it will perform better than you expect.

[Allen Sutphin 705]

I like the HKS. Mike Ricketts has had a ton of fun with his. I think it will perform better than you expect.

I think you're right! A wrong prop/reduction combination can make a great engine a dog as the right combination can make a so so engine do really well. He said it done great in cruise but didn't do well full gross on take off. A 3.47 ratio swinging a 72" 3 blade isn't the best for take off performance, roughly 1750 prop RPM is not the ideal combo for take off performance.