372 Carb swap on 2159

[ZukiRyder440]

Welp, hate to say it but I felt no gains in the saw cutting with this carby. Just presented more tuning issues and was kinda sluggish off the low end.. Not really worth it.

 

[AKJonsereds]

Thanks for keeping us updated. Good to have some closure

 

[Ketchup]

What if you add some intake timing and hog out the transfers?

 

[ZukiRyder440]

What if you add some intake timing and hog out the transfers?

Not a bad idea but what I would gain RPM but would lose the “lugging” ability.

 

[tickbitintn]

kinda big carb for small displacement.
makes tuning tougher and most likely would only benefit at wot and high revs.
would be an interesting swap on a race/well modded saw

 

[ZukiRyder440]

Shaun Carr put a full 372 intake/ carb setup on one of his racer 346s and that thing ran like a scalded dog.

 

[Ketchup]

Not a bad idea but what I would gain RPM but would lose the “lugging” ability.

Your thinking bigger flow channels would increase RPM but lose torque? I would have thought the opposite.

Shaun Carr put a full 372 intake/ carb setup on one of his racer 346s and that thing ran like a scalded dog.

I wouldn’t be surprised if the intake and transfers were larger inside. He has talked about that on some of his other builds. Probably some extra exhaust too.

 

[Quzick]

I have seen a 346 with 372 carb, and it was a screamer. But sadly i have no more info of that saw...

 

[Benwa]

I know everything is relative. Do you have another thread on the rest of the build on this saw? I'm guessing it's not stock. Not everyone wants to share & I totally understand. If we all had an idea of the level/extent of port work done, it might shed more light on the subject. At any rate, thanks for sharing bud!

 

[ZukiRyder440]

I know everything is relative. Do you have another thread on the rest of the build on this saw? I'm guessing it's not stock. Not everyone wants to share & I totally understand. If we all had an idea of the level/extent of port work done, it might shed more light on the subject. At any rate, thanks for sharing bud!

I did a thread on another recipe a while back but I have a different recipe now. .030” from band, .030 from. exhaust 105.5, transfers 121 intake 80
More exhaust will probably be good with this carb, im thinkin 102-103. Lowers were case matched,

 

[ZukiRyder440]

Thats muh uppers

 

[tickbitintn]

That should make good use of the 372 carbs flowing abilities. [emoji6]

At the start of this thread I didn't realize the recipient of this carb swap had been "massaged"!!
Had I realized that I wouldn't have made my earlier comment. My sorries!! Lol

Sent from my XT1635-01 using Tapatalk

 

[Ketchup]

Thats muh uppersView attachment 315522View attachment 315523

Very nice grinding. Have you read this?

https://www.arboristsite.com/threads/husqvarna-359-stock-versus-ported.293648/

That HD would probably compliment CJ’s transfers. Too bad that guy’s a shiester.

 

[ZukiRyder440]

That should make good use of the 372 carbs flowing abilities. [emoji6]

At the start of this thread I didn't realize the recipient of this carb swap had been "massaged"!!
Had I realized that I wouldn't have made my earlier comment. My sorries!! Lol

Sent from my XT1635-01 using Tapatalk

Your fine mang. I MIGHT try the again but build up another 359 to be my “test mule”

 

[ZukiRyder440]

Very nice grinding. Have you read this?
https://www.arboristsite.com/threads/husqvarna-359-stock-versus-ported.293648/
https://www.arboristsite.com/threads/husqvarna-359-stock-versus-ported.293648/

That HD would probably compliment CJ’s transfers. Too bad that guy’s a shiester.

Thanks!

 

[Bjorn]

Hello. I am not an expert, but i think you need more blowdown, like 25 degrese. So that small cylinder can handle the big load from the carburator. More fuel mix comming in, more has to get out.

 

[ZukiRyder440]

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