A Little Improvement Porting The 562xp

[mdavlee]

W'sup Bro!!!!!??

Sitting here cruising ebay for parts.

 

[Wolverine]

I could not believe the power that husky made!!!! it ran circles around the Creamsicle,,, actually it was like driving a Porsche 911 compared to a stock volkswagon

Mind if I quote that in my sig?

 

[riverrat2]

Mind if I quote that in my sig?

Go for it Big Daddy!!!!

Hate to say it,,,,, but it was the truth!!!!! and the truth hurts!!!!!

Sitting here cruising ebay for parts.

What you building?????

 

[awol]

I notice the 562 cylinder employs a staggered transfer port layout where the mains and auxiliary transfers open at different stages. Would love to know Allen's thought's on this and weather its a key piece of the pie when it comes to the 562 power house. Also weather they are both angled in the same direction or if they are differently angled? It seems you have had good success in widening the both uppers, did you make any changes to the port roof angles?

The 562 only has dual transfers. For a work saw I do change the roof angle, giving it a little more on the intake side. For a play saw saw with higher exhaust, the flatter the better!

 

[mdavlee]

Go for it Big Daddy!!!!

Hate to say it,,,,, but it was the truth!!!!! and the truth hurts!!!!!



What you building?????

Got a 385 and a 394 to put together put of parts.

 

[Hedgerow]

If only the 562 could be made to outrun muh 365..

 

[mdavlee]

If only the 562 could be made to outrun muh 365..

Someone may eventually do that. Probably not with the carb that's on them right now.

 

[pro94lt]

Have you ran 50:1 in the saw? I don't know if I'm correct but a lot of bogging issues seem to be in saws with 32:1 mix????

 

[Hedgerow]

Have you ran 50:1 in the saw? I don't know if I'm correct but a lot of bogging issues seem to be in saws with 32:1 mix????

I've run everything under the sun in that saw.

 

[Keith Gandy]

Whats up on porting the 562xp? Still the same plan as described here? I got one thats gonna get a foredom sooner or later!! Lol!!

 

[johnny5ny]

awesome thread!!!!
makes me want to take apart and grind on my perfectly fine running 562
I think I owe it to myself to at least yank the base gasket since the MM

ps - I'm sure I speak for a lot of other guys when I say thank you for such a free-flow of information you guys share on OPE.
I've NEVER not been impressed by the work the builders on THIS site do.

 

[awol]

Whats up on porting the 562xp? Still the same plan as described here? I got one thats gonna get a foredom sooner or later!! Lol!!

Pretty much. Let us know how yours turns out!

 

[Keith Gandy]

Pretty much. Let us know how yours turns out!

Thanks man! Will do

 

[Locust Cutter]

Both the upper trans and stratos were widened, and strato timing was increased by grinding the piston. I also raised the exhaust side piston skirt, to help open up the lowers a bit.
View attachment 9075


The actual intake port was left untouched, I only removed a bit of casting flash and smoothed things out a bit.
View attachment 9077

I wonder if slightly notching the strato intake to allow a slight bit more bypass (to get things going faster) would help any after the aforementioned mods. If you're adjusting the timing with regard to a/r-fuel mix delivery, it would almost seem logical that allowing a bit more bypass would ever so slightly lean the mixture back out, although that may be counter-productive for torque... Just a thought.

Alan,
I think after some other pressing bills are dispensed with, my 562 may come and see you for a massage.

 

[sunfish]

Pretty much. Let us know how yours turns out!

Hey man, we need to get together. See if you want to build a couple saws and do some swapping an stuff. I'm covered up with 346 & 357 projects.

 

[Onan18]

I'm covered up with 346 & 357 projects.

We all know you hoard them.

 

[sunfish]

We all know you hoard them.

Too many, I know.

 

[awol]

Hey man, we need to get together. See if you want to build a couple saws and do some swapping an stuff. I'm covered up with 346 & 357 projects.

Yup, sawbuilding season is approaching!

 

[Locust Cutter]

Alan,
have you devised a good 550xp recipe yet, or do you know anyone who has?

 

[awol]

No, not really. All I have done to the 550 is a basic woods port, no R and D.