357XP: First Time Porting

[RIDE-RED 350r]

Here it is...Josh's (XP_Slinger) saw

Don't forget to post up the vid of my saw for comparison...

 

[Sty57]

Does anyone know the cut off serial number when they changed pistons? That's a serious concern when these things come up for sale quit often. I wouldn't buy the early one.

I'll have to do some digging Jim.
I know on one of the IPL'S it had a S/N cut off.

 

[Sty57]

It looks like up to S/N 020700001
Here's the IPL that shows it.
http://cloud.tapatalk.com/s/57afb63d6e25b/357 XP_359, 2003-04.pdf

 

[RIDE-RED 350r]

It looks like up to S/N 020700001
Here's the IPL that shows it.
http://cloud.tapatalk.com/s/57afb63d6e25b/357 XP_359, 2003-04.pdf

Thank for that!


Looks like yours and mine are safe Josh

 

[XP_Slinger]

Here's Joe's saw, I think the chain is biting a bit hard and isn't doing it any favors. Still runs strong.

 

[Sty57]

Thank for that!


Looks like yours and mine are safe Josh

Looks like it was somewhere between 2002-2003 was the change over.

 

[XP_Slinger]

Now that I've seen (heard) these videos Joe I don't think my changes made much of a difference...as I thought might be the case. Frigin log rolling didn't help either saw. Back to the drawing board....

 

[RIDE-RED 350r]

Looks like it was somewhere between 2002-2003 was the change over.

Mine was made in '05 and I believe Josh's is '06

 

[RIDE-RED 350r]

Now that I've seen (heard) these videos Joe I don't think my changes made much of a difference...as I thought might be the case. Frigin log rolling didn't help either saw. Back to the drawing board....

I don't remember, did you widen the exhaust???

Also, I'm thinking about 3 deg higher ex and trans might wake er' up good... But I could be wrong, I'm no expert...

 

[XP_Slinger]

I don't remember, did you widen the exhaust???

Also, I'm thinking about 3 deg higher ex and trans might wake er' up good... But I could be wrong, I'm no expert...

Yes I widened the exhaust a little. Also advanced the timing. Son of a gun certainly revs quicker now. And the tach did show my saw holding 1k higher in the cut than yours. But again, your chain was biting a little harder which is most likely the cause of the lower rpm in the cut.

 

[RIDE-RED 350r]

Just went back to post #1 and looked at your numbers... If it were me, I might just raise the ex to 103, widen it to 65% of bore and leave transfer alone for now. I don't think widening the ex to 65% will hurt, I took my 372 to just about 70% and that saw rips.. Granted, two different engines but I think the idea still applies....I think the lower ex might be what's holding you back from spinning over 14K safely.

And yes, it does certainly rev quicker..at least to my ear.

 

[mdavlee]

I think the one was 102-103 on exhaust and 16-20 degrees of blowdown. I can't remember for sure. It would 4 stroke to 16k

 

[RIDE-RED 350r]

I think the one was 102-103 on exhaust and 16-20 degrees of blowdown. I can't remember for sure. It would 4 stroke to 16k

I'd be 4-stroking in my dungarees if I had a saw spinning 16K! LOL!

 

[mdavlee]

I'd be 4-stroking in my dungarees if I had a saw spinning 16K! LOL!

I've had a few that were right at 17k

 

[Wagnerwerks]

I've had a few that were right at 17k

Dozerdan has a 2165 that is the same way. He had it at last year's gtg and it was fun to run.

 

[mdavlee]

I don't usually leave them up that high but they'll get away sometimes

 

[XP_Slinger]

Just went back to post #1 and looked at your numbers... If it were me, I might just raise the ex to 103, widen it to 65% of bore and leave transfer alone for now. I don't think widening the ex to 65% will hurt, I took my 372 to just about 70% and that saw rips.. Granted, two different engines but I think the idea still applies....I think the lower ex might be what's holding you back from spinning over 14K safely.

And yes, it does certainly rev quicker..at least to my ear.

Sounds like a good plan. I will leave the transfers alone as I think it could benefit from a little more blow down. I'll probably put the exhaust at 104° just to keep my slow and steady learning curve going

 

[XP_Slinger]

I think the one was 102-103 on exhaust and 16-20 degrees of blowdown. I can't remember for sure. It would 4 stroke to 16k

Thanks for the comparative info Mike. I'm sure your saw would make a crocodile blush...lol

 

[mdavlee]

Thanks for the comparative info Mike. I'm sure your saw would make a crocodile blush...lol

It's not mine but it ran good. I'm sure it's even better now after some run time. It was a new cylinder when I ported it.

 

[jacob j.]

I've had a few that were right at 17k

There was a small crowd on AS years ago that swore up and down that running a saw that high would "sling the oil right off the bearings."