Author Topic: 359/357xp  (Read 598 times)

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Online srcarr52

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Re: 359/357xp
« Reply #10 on: December 03, 2014, 10:18:16 am »
Would you use the crank stuffers with the AM 47mm jug that has transfers like a 357XP (no 353/359 type port covers).....or would the non-stuffed crank be better with those? IIRC it's a Hyway 'big bore 357XP' cylinder that WEM sells...

My Big Dave Neiger ported 357 wasnt peaky at all IMO.  For 56.5cc saw I was impressed with it.  Had pop up and around 180psi if I remember right.  Also used oem intake gasket like I like to do.

I'm basing this information off a few Hyway 357 type transfer with 359 bore saws that I did.  I ported two almost identical, one had stuffers one didn't.  The stuffers one wanted to hold about 1k more in the cut but didn't have the torque of the other to be heavy handed.  These were both work saws and in my opinion need to have a forgiving power band to being over loaded.  I took the stuffers out and it had all the grunt I'd ever want. 

When I put them together straight out of the box the stuffers one was a little better, more snap and a little higher RPM but it wasn't close to how they are after being ported.  Also the blue coil was faster here, before ignition timing was altered. 

Here is a 2159 (no stuffers) with a ported 359 Hyway cylinder. 
I have some other videos that I never uploaded to youtube, but this Jred was 1 second faster than the almost identically ported cylinder on a 357 bottom end (stuffers).

https://www.youtube.com/watch?v=uNjF8GRmrzc

Just for fun here is a stock Hyway cylinder on 357 (stuffers), blue coil vs. stock 2159 OEM cylinder that wasn't in the best of shape.

https://www.youtube.com/watch?v=IKx3kURe-co

Offline Bluegill

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Re: 359/357xp
« Reply #11 on: December 03, 2014, 10:47:43 am »
Thanks for the info Srcarr. I have heard of the 'more torque without stuffers'.

I will put this one together without stuffesr and ported like my other 357xp and compare.

Might even try a Hyway kit on the other 359. How are those holding up for you?

Offline 660magnum

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Re: 359/357xp
« Reply #12 on: December 03, 2014, 10:48:42 am »
From what I understand, the Dave Neiger woods ported saws were typically more of a torque enhanced tune than a all out high rpm set up.

I have a 372 from him and it was a very nice all day work saw - not a cookie cutter only GTG saw. 
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Online srcarr52

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Re: 359/357xp
« Reply #13 on: December 03, 2014, 12:12:45 pm »
Thanks for the info Srcarr. I have heard of the 'more torque without stuffers'.

I will put this one together without stuffesr and ported like my other 357xp and compare.

Might even try a Hyway kit on the other 359. How are those holding up for you?

One flaked some plating and stuck the ring above the exhaust port.  A new ring and a little more ex timing to smooth it back out and it was back in buisness.  Still running strong, actually stronger now with a little more ex timing.  The other hasn't had a problem.  The plating on this particular AM cylinder was not very well adhered so you have to be very careful not to lift the plating when porting.  But at finished from the factory the plating goes into the ports and I don't think you've have any problems. 

Offline Cut4fun .

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Re: 359/357xp
« Reply #14 on: December 03, 2014, 12:29:47 pm »
correction. That was suppose to say Oem BASE gasket not intake gasket.   :P :-[
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Offline Bluegill

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Re: 359/357xp
« Reply #15 on: December 03, 2014, 01:46:07 pm »
Quote
correction. That was suppose to say Oem BASE gasket not intake gasket.   :P :-[

That's what I figured. ;)

Offline Bluegill

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Re: 359/357xp
« Reply #16 on: December 08, 2014, 02:07:49 pm »
Well, it's alive and strong as hell. :D

New bearings, seals & oem 357xp top-end. I took .027" off the cylinder base to bring the squish down to .020". Comp is at 195 psi with only one and a half tanks through it.

My other older 357 is at 190 with just a base gasket delete, so there is something good about these 357 cylinders! There is no point in cuttin squish band or doing a pop-up with this kind of comp, IMO.

Not ported yet, I'm waiting on a right angle hand piece for my flex shaft grinder. I'll likely just raise the upper transfers about .040-.050" and open up the exhaust port a bit.

Offline 660magnum

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Re: 359/357xp
« Reply #17 on: December 08, 2014, 04:02:37 pm »
Sounds like it is good enough the way it is.
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
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Offline Cut4fun .

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Re: 359/357xp
« Reply #18 on: December 08, 2014, 04:13:18 pm »
Me and 660 compared his stock 357xp and 346xp NE one time with same chains if I remember right. Let me go dig up timed cuts we did for fun.
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Offline Cut4fun .

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Re: 359/357xp
« Reply #19 on: December 08, 2014, 04:19:35 pm »
Bluegill I know you like .325.  All these times are with 3/8.

12" round maple

stock husky 346xp 50cc  3/8 7T  5.63  5.62

stock dolmar 5105 with 5100 muffler 50cc   3/8 7T  5.59  5.50

stock partner 5000 49cc 3/8 7T 5.47 5.84

stock 357xp 56.5cc 3/8 7T  4.29  4.34

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