Let's Talk Transfers

[jmssaws]

I've never built a pipe saw so there's a lot I need to learn about transfers.

 

[tree monkey]

So if you see grinding in the lowers or case matching as enhancing flow, that is more important to you?


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yes

 

[tree monkey]

http://opeforum.com/threads/my-2153.909/

look at the porting I did to this saw. built for torque

 

[jmssaws]

There are saws that don't live and die on velocity or capacity. You have to learn each model.

I've noticed huskys don't really mind more grinding but stihls do.

 

[paragonbuilder]

http://opeforum.com/threads/my-2153.909/

look at the porting I did to this saw. built for torque

I've read through that thread a couple times. I noticed you used jb weld to fill in the case below the lower transfers. Was that to eliminate the step thereby enhancing flow, or to add some case compression back as someone had mentioned in your thread?


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[jmssaws]

You trade one for the other,it's a compromise.

There is no case matching on a stihl and the more you grind on one the worse it will run.

 

[tree monkey]

it does both. I was looking more at flow

 

[tree monkey]

don't remove anything that you don't need to

 

[jmssaws]

don't remove anything that you don't need to

You and me will get along just fine.

 

[Dieselshawn]

 

[jmssaws]

I see you have a dyno,will you run a saw for someone?

 

[Ironworker]

I've only done six saws and the last two I did very little grinding, taking the less is more approach, mostly on the lowers and widening the exhaust and very little on the uppers on one and nothing to the uppers on another, my theory being that the charge will increase volume as it comes up the transfers and a nice wide smooth exhaust for a nice fast flow of spent gases.

 

[Dieselshawn]

jmssaws: I can.

 

[Moparmyway]

I've only done six saws and the last two I did very little grinding, taking the less is more approach, mostly on the lowers and widening the exhaust and very little on the uppers on one and nothing to the uppers on another, my theory being that the charge will increase velocity as it comes up the transfers and a nice wide smooth exhaust for a nice fast flow of spent gases.

Fixxed it for ya

 

[Ironworker]

Fixxed it for ya

Thanks, same volume but faster.

 

[tree monkey]

it's not about how fast the charge is moving, but how much charge your moving in a given time. volume, air pump

 

[Redfin]

Been running tranfer configurations through my noodle today specifically Scott saying mains first. Im having a hard time figuring why, thinking intake open first should "push" out the ex.

We talk alot about direction, velocity and volume what about ignition? Is there any ignition of the incoming charge from the heat on the ex side?

 

[paragonbuilder]

it's not about how fast the charge is moving, but how much charge your moving in a given time. volume, air pump

That would insinuate larger ports are better. But doesn't seem to be the case...


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[paragonbuilder]

Been running tranfer configurations through my noodle today specifically Scott saying mains first. Im having a hard time figuring why, thinking intake open first should "push" out the ex.

We talk alot about direction, velocity and volume what about ignition? Is there any ignition of the incoming charge from the heat on the ex side?

No. It doesn't ignite til it's under compression and the plug fires.


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[paragonbuilder]

No. It doesn't ignite til it's under compression and the plug fires.


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It takes a lot of heat to ignite with out spark.


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