hog wild 359 lower transfers

PWI (porting while intocicated). mmmmmmmmm VO and seven
comparison

did this awhile back idnt have carbide burr avalable then

hogged out alot

exhaust, i need to widen this out more. can you belive i actualy had this saw down 3 times before grinding more each time and its now getn hogged out some more.

didnt know how to take close up pics way back when

intake, ill have to check and see if i can widen it more aswell. this is the first saw i ported on.



i cant even remember what the lower transfers used to look like , i now feel like i see things alittle difrently with a carbide bure and grinder in hand. i can do quite abit on this thing even though ive already messed with it

the saw incase you where wondering. 359 tackled this 32" treee its one of the few tree removal jobs ive done


off for another VO and seven

OK EVAN where is the video,I love my 359s need to port one at least!!!!

umm might have an old video, ill have to dig it up

old vid after first grinding
<embed width="448" height="361" type="application/x-shockwave-flash" wmode="transparent" src="http://i661.photobucket.com/player.swf?file=http://vid661.photobucket.com/albums/uu339/Evan03_photo/359vid1.flv">

Did you raise the intake port?

slightly when i first ported it awhile back. it didnt hurt it any. atleast gasketless it didnt hurt it any

Evan said:

old vid after first grinding
<embed width="448" height="361" type="application/x-shockwave-flash" wmode="transparent" src="http://i661.photobucket.com/player.swf?file=http://vid661.photobucket.com/albums/uu339/Evan03_photo/359vid1.flv">

Click to expand...

I hope you don't cut like that anymore...

That looks dangerous...:taped:

yeah that wasnt my brightest moment
but not my worst either, im sure you can critigue it to the moon

Evan said:

slightly when i first ported it awhile back. it didnt hurt it any. atleast gasketless it didnt hurt it any

Click to expand...

Maybe you already know it, but I'll clarify for others reading. Typically, you don't want to raise the roof of the intake port. Intake happens as the piston moves upward and the skirt begins to open at the bottom of the intake port. If you want to increase intake duration, you lower the floor of the port. Also, if you raise it, you risk dropping a ring into the port that wasn't designed to be. You want to widen the intake just like you do the exhaust. I tend to increase intake duration a few degrees as well.

blsnelling said:

Maybe you already know it, but I'll clarify for others reading. Typically, you don't want to raise the roof of the intake port. Intake happens as the piston moves upward and the skirt begins to open at the bottom of the intake port. If you want to increase intake duration, you lower the floor of the port. Also, if you raise it, you risk dropping a ring into the port that wasn't designed to be. You want to widen the intake just like you do the exhaust. I tend to increase intake duration a few degrees as well.

Click to expand...

what are the drawbacks of lowering the intake port?

you should take a bunch more metal out of each transfer and see how she runs, i would be curious..

that is at max right now, transfer cover barley has anything to ride on

Evan said:

that is at max right now, transfer cover barley has anything to ride on

Click to expand...

You can see where the cylinder base is still blocking the transfers by where the RTV line is.

i agree with Brad

if i had it to do over again id widen only,

wide wide wide, never raise or lowere

blsnelling said:

You can see where the cylinder base is still blocking the transfers by where the RTV line is.

Click to expand...

Brad,

Which pic are you referencing here? Is this the one?



What exactly is RTV? Is that the buildup? Are you saying to open it up so that goes in the cylinder rather than being blocked?

Cheers,
TT

RTV is room temperature vulcanizing. that would be the sealant used as gasket. I have no idea what Brad means, I've been trying to figure that out. But...I just came home from a party with a large punch bowl that was mighty tasty so maybe I'm just "confused"

Brad was referencing removal of the material shown below. . .

Metals406 said:

Brad was referencing removal of the material shown below. . .

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Nate,

Thanks for pointing that out. Does that mean also around the top and bottom also, or only on the sides?

I should go read one of Brad's porting threads...I know he's posted stuff before as I've seen him reference it to folks...:-/

I'm on the lookout for something I can learn on, I need the two saws I have right now for building...this is how CAD sets in...next thing I'll have an extra saw to play with, and then another will pop up at an unbelievable price, and before you know it you have half a dozen of 'em, then a dozen, a couple, then three...

TraditionalTool said:

Nate,

Thanks for pointing that out. Does that mean also around the top and bottom also, or only on the sides?

I should go read one of Brad's porting threads...I know he's posted stuff before as I've seen him reference it to folks...:-/

I'm on the lookout for something I can learn on, I need the two saws I have right now for building...this is how CAD sets in...next thing I'll have an extra saw to play with, and then another will pop up at an unbelievable price, and before you know it you have half a dozen of 'em, then a dozen, a couple, then three...

Click to expand...

LOL, YUP--that's how CAD infects you.


As far as your question on the lower transfer material. . . What you're trying to accomplish is "port-matching" the transfers to the case to improve flow. The clear "RTV line" in the picture, just shows that additional material could be removed, and with a little more uniformity (no offense to Evan).

yeah alitle more needs to be removed and uniformed alittle better. but even if i do this i think the pic represents pretty much what 100% gain is over the factory 359 lower transfer. i could probly stop now and be good to go

i may work the corners over alittle more. this seems to be wear the most material needs to be removed right now.

i actualy went alittle far and ground into one of the transfercover bolts pretty good. probly need some rtv to get this cover to seal again