Which ported 50cc saw

[angelo c]

Ok guys, because I was keeping notes and fell asleep in the back of the class:

recap

Thread starts out with a simple question, gets messy with a fight between Randy and Brad, lots of good info passed along between some good guys, lots of us knuckleheads get lost in the shuffle, I nod off and now Randy and Brad have made up?? Can some one save me some time and point me to the ..."kiss and make up session" .....darn it's hard to keep up with out a smart phone that is smarter then the operator.

 

[blsnelling]

Trust me. There was no kissing involved!!!!!!!!!!!!!!!!!!!

 

[Mastermind]

Pretty good stuff.

In his example engine squish was at .047


When I opened the squish on the 461 to .030 and still had 200psi that was the smoothest running one and the most powerful I had done yet.

There is still so much to learn......I feel like I've just barely scratched the surface.

 

[Mastermind]

Ok guys, because I was keeping notes and fell asleep in the back of the class:

recap

Thread starts out with a simple question, gets messy with a fight between Randy and Brad, lots of good info passed along between some good guys, lots of us knuckleheads get lost in the shuffle, I nod off and now Randy and Brad have made up?? Can some one save me some time and point me to the ..."kiss and make up session" .....darn it's hard to keep up with out a smart phone that is smarter then the operator.

Brad and I have known each other for several years. We don't always agree....and at times he frustrates me. Don't you have disagreements with your friends?

 

[blsnelling]

Pretty good stuff.

In his example engine squish was at .047


When I opened the squish on the 461 to .030 and still had 200psi that was the smoothest running one and the most powerful I had done yet.

There is still so much to learn......I feel like I've just barely scratched the surface.

Perhaps the higher the compression, the lower the MSV needs to be??? Any evidence that too much compression hurts RPMs? My 390XP has nearly 200 PSI and makes great RPMs. The exhaust is a little higher than I normally go though.

 

[Jon1212]

Well one things for certain, there aren't as many saws being ported right now with all of you Master Saw Builders on here B#### slapping each other, and I find that to be most egregious of all.

Now get your asses back to work.

The above post was made on page 18 of this thread, and everyone had a good laugh, and the hand holding/ Cumbaya singing ensued.

Ok guys, because I was keeping notes and fell asleep in the back of the class:

recap

Thread starts out with a simple question, gets messy with a fight between Randy and Brad, lots of good info passed along between some good guys, lots of us knuckleheads get lost in the shuffle, I nod off and now Randy and Brad have made up?? Can some one save me some time and point me to the ..."kiss and make up session" .....darn it's hard to keep up with out a smart phone that is smarter then the operator.

So to answer your question, the joy returned to Brad and Randy's friendship about 13 pages ago.

 

[Mastermind]

Perhaps the higher the compression, the lower the MSV needs to be??? Any evidence that too much compression hurts RPMs? My 390XP has nearly 200 PSI and makes great RPMs. The exhaust is a little higher than I normally go though.

I've built engines with as much as 240psi without seeing any issues with a lack of RPM. In these saw engines I think we will see damage to components before we reach a point of diminishing returns.

Rolltide's 395XP is blowing 235psi and the only issue we've seen is a bit of run on when it's shut off after a long cut in wood over 36". Octane boost cured that though. I don't see the starter lasting as long but the saw is a freaking beast.

 

[Mastermind]

The above post was made on page 18 of this thread, and everyone had a good laugh, and the hand holding/ Cumbaya singing ensued.



So to answer your question, the joy returned to Brad and Randy's friendship about 13 pages ago.

"I have a potty mouth" in Utah with a sharp stick to the nether regions.....repeat as needed to dislodge you head from your ass.

Your dear friend, Randy

 

[Jon1212]

I've built engines with as much as 240psi without seeing any issues with a lack of RPM. In these saw engines I think we will see damage to components before we reach a point of diminishing returns.

Rolltide's 395XP is blowing 235psi and the only issue we've seen is a bit of run on when it's shut off after a long cut in wood over 36". Octane boost cured that though. I don't see the starter lasting as long but the saw is a freaking beast.

I here that's also common in blue S10 pick ups from a certain county in Tennessee.

 

[Jon1212]

"I have a potty mouth" in Utah with a sharp stick to the nether regions.....repeat as need to dislodge you head from your ass.

Your dear friend, Randy

Can the said "sharp stick" be "aftermarket", or should I use OEM sticks only?

 

[komatsuvarna]

I've built engines with as much as 240psi without seeing any issues with a lack of RPM. In these saw engines I think we will see damage to components before we reach a point of diminishing returns.

Rolltide's 395XP is blowing 235psi and the only issue we've seen is a bit of run on when it's shut off after a long cut in wood over 36". Octane boost cured that though. I don't see the starter lasting as long but the saw is a freaking beast.

Randy, do you think the lower compression saws (180ish) run more free or loose than the one's pumping 220ish?

It may just be in my head....I've only done a couple over 200psi, but they seemed more tighter the higher the compression gets.

 

[bryanr2]

For what it is worth- I am proud of you both Randy and Brad. This thing got a little nasty but if you read between the lines in each of your post- respect for eachother was evident. (And it made for some much needed drama- been kinda boring lately) We don't have to agree to be friends. Hell, Kari is my best friend and we NEVER agree. I look up to you both for your knowledge and contributions to this site.

 

[Tzed250]

Can the said "sharp stick" be "aftermarket", or should I use OEM sticks only?

Brad will do the comparo and report back.

 

[bryanr2]

Brad will do the comparo and report back.

Pls break the first rule of AS- "requiring pics- or it didnt happen". They will not be needed.

 

[Mastermind]

Can the said "sharp stick" be "aftermarket", or should I use OEM sticks only?

Either or......it should only need to be sharp.

Randy, do you think the lower compression saws (180ish) run more free or loose than the one's pumping 220ish?

It may just be in my head....I've only done a couple over 200psi, but they seemed more tighter the higher the compression gets.

I have a theory.......on a cant saw I don't think as much compression as a work saw is really wanted.

At least on gas.

Compression makes torque.

Brad will do the comparo and report back.

 

[komatsuvarna]

I have a theory.......on a cant saw I don't think as much compression as a work saw is really wanted.

At least on gas.

Compression makes torque.





I'll go along with that!

 

[Mastermind]

I shoot for no more than 200psi on a 70cc and larger work saw. Some guys ask for more. I do it.

On a smaller bore I shoot for 225psi.

 

[angelo c]

Brad and I have known each other for several years. We don't always agree....and at times he frustrates me. Don't you have disagreements with your friends?

Sure thing Randy, it's ok to argue, specially with "type A" personalities we all have here. You know I'm being selfish when I say, we are all better off if you "guys play nice in the sand box".

 

[rms61moparman]

Sure thing Randy, it's ok to argue, specially with "type A" personalities we all have here. You know I'm being selfish when I say, we are all better off if you "guys play nice in the sand box".

Well we certainly want to keep a bit of spark in them!
Without it, rivalry dies and along with it.....innovation. And we all know who benefits from that innovation, right????

The AS community.


Mike

 

[woodyman]

Some builders say don't go over 180psi on a woods ported saw that will be used every day.Do you have any kind of warranty on your ported saws Randy and if so where would it stop as far as how hot someone would want there saw ported?I have talked to some builders that do either a woods port or cookie cutter and won't guarantee the cookie cutter and won't do a saw in between.