Big Block
WFO or I don't go
No the jug goes off the machine shop this week. So it'll be a week or to before I can.
'15 Echo CS620PW Information
- Thread starter BGE541
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Idahonative
Addicted to ArboristSite
I'm curious if all those extra holes and extra air flow messes up the "G-Force Engine Air Pre Cleaner" that Echo designed into that saw. That system does a good job of keeping the air filter clean. I don't want to come across as being critical Big Block because I think trying new things is a good thing. How else would we figure out ways to improve things? But I have my reservations about that set up.
Best I can tell, Echo designed some pretty good air flow into the carb. There is a lot of surface area on the filter itself and plenty of space for air to come into the filter area. If you were building a "racer" I could maybe see opening it up like that (maybe?). But just a MM, tune, base gasket delete?...I'm not so sure. Should you ever decide to run a blower and nitrous though...I think you're all set up
.I know diesel trucks and chainsaws are two different things but this reminded me of a phase I went through almost 10 years ago. I kind of got hooked on "improving" my '05 Dodge Cummins. Swiss cheesed the air box and wasn't satisfied with that so I spend $450 on an AFE fresh air intake. Well, if I increase the intake, gotta increase the exhaust, right? Spent another $400 on the exhaust. All for a mild tune...no aftermarket parts in the engine or turbo.
Long story short, me and a local guy had the exact same truck with the exact same tune. Only thing he didn't have was the "upgraded" intake and exhaust. One weekend we threw our trucks on the dyno and guess what? Yep, they dyno'd exactly the same...430 hp/805 ft/lb. torque. All of the marketing ******** about improved power and fuel economy was just that...marketing ********. The dyno told us the air intake and exhaust WAS NOT restrictive at that power level. Increase the power to 500hp/1000 ft/lb torque and it might have started to become a factor.
Don't get me wrong, I really am interested in DIY improvements to these saws and I know a person has to experiment to figure those things out. Good luck and I'll keep my eye on what you're doing.
Friidayyy13
ArboristSite Member
I had it in pine, at least 1 year since it was felled.
About 14" , and the 400 just bogged a little. 18" bar and Carlton semi chisel.
Also went from cold starting 1 pull like I said earlier to starting only if I had my hand on the throttle, and after I through the new plug in and ran it for about 20minutes it dies idling randomly (never did that before)
I realize it's a 40cc but I didn't expect it to lack that much power.
The 620 pretty much fell through the wood haha. Thing has some balls.
About 14" , and the 400 just bogged a little. 18" bar and Carlton semi chisel.
Also went from cold starting 1 pull like I said earlier to starting only if I had my hand on the throttle, and after I through the new plug in and ran it for about 20minutes it dies idling randomly (never did that before)
I realize it's a 40cc but I didn't expect it to lack that much power.
The 620 pretty much fell through the wood haha. Thing has some balls.
Friidayyy13
ArboristSite Member
I almost think it needs a rebuild maybe low compression? I need my snap on guy to drop off a compression tool I ordered awhile back.
Big Block
WFO or I don't go
I'm curious if all those extra holes and extra air flow messes up the "G-Force Engine Air Pre Cleaner" that Echo designed into that saw. That system does a good job of keeping the air filter clean. I don't want to come across as being critical Big Block because I think trying new things is a good thing. How else would we figure out ways to improve things? But I have my reservations about that set up.
Best I can tell, Echo designed some pretty good air flow into the carb. There is a lot of surface area on the filter itself and plenty of space for air to come into the filter area. If you were building a "racer" I could maybe see opening it up like that (maybe?). But just a MM, tune, base gasket delete?...I'm not so sure. Should you ever decide to run a blower and nitrous though...I think you're all set up
I know diesel trucks and chainsaws are two different things but this reminded me of a phase I went through almost 10 years ago. I kind of got hooked on "improving" my '05 Dodge Cummins. Swiss cheesed the air box and wasn't satisfied with that so I spend $450 on an AFE fresh air intake. Well, if I increase the intake, gotta increase the exhaust, right? Spent another $400 on the exhaust. All for a mild tune...no aftermarket parts in the engine or turbo.
Long story short, me and a local guy had the exact same truck with the exact same tune. Only thing he didn't have was the "upgraded" intake and exhaust. One weekend we threw our trucks on the dyno and guess what? Yep, they dyno'd exactly the same...430 hp/805 ft/lb. torque. All of the marketing ******** about improved power and fuel economy was just that...marketing ********. The dyno told us the air intake and exhaust WAS NOT restrictive at that power level. Increase the power to 500hp/1000 ft/lb torque and it might have started to become a factor.
Don't get me wrong, I really am interested in DIY improvements to these saws and I know a person has to experiment to figure those things out. Good luck and I'll keep my eye on what you're doing.
I'm sure it messed with the g force cleaning. If the air filter gets totally filthy on one usage I'll order another plate. I'll keep you guys posted.
Big Block
WFO or I don't go
The part is 9.98 plus shipping so it's a fairly cheap mistake if I have to replace it
CoreyB
Addicted to ArboristSite
Or just put electrical tape over the holes.
Big Block
WFO or I don't go
I like that
Big Block
WFO or I don't go
I have the gap pointing up into the chamber. For all intents and purpose it is pointing at the exhaust. If you look at the wash on the piston. The fuel air mix coming in the transfer ports is flowing directly at the plug.
Ya I got lucky and just took the gasket off and it timed perfect
Big Block
WFO or I don't go
Friidayyy13
ArboristSite Member
Morning guys (on the east coast)
I just found a backup saw I'll be buying today.
Husky 357xp for $100.
Looks like it's seen some use but I've heard good things about the old dirty emission huskys.
Once I get that I'll be putting my 400 under the knife for some modifications!
I just found a backup saw I'll be buying today.
Husky 357xp for $100.
Looks like it's seen some use but I've heard good things about the old dirty emission huskys.
Once I get that I'll be putting my 400 under the knife for some modifications!
Friidayyy13
ArboristSite Member
Friidayyy13
ArboristSite Member
Yes it runs, got the guy down to $100.
Big Block
WFO or I don't go
Friidayyy13
ArboristSite Member
I'd like to mod that one also yes rattler!
Thanks big block
But bad news guys, took off my cs400's muffler and my piston is scored like CRAZY. Guess it has seen some use after all.
Guess I'll be ordering a top end kit for that also.
Thanks big block
But bad news guys, took off my cs400's muffler and my piston is scored like CRAZY. Guess it has seen some use after all.
Guess I'll be ordering a top end kit for that also.
I figured you would[emoji2]
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