SuzukiSavage.com - Exhaust port

klx650sm2002

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Re: Exhaust port
Reply #45 - 03/11/07 at 08:44:08

Hey Lancer
It would appear that you are going to take too much off the head, My figures were the amount to be taken off the barrel not the head,but this was only if the squish clearance is .050" to .060"
The total amount you can take off the barrel + head is dependant on the figures you need from your cam manufacturer which I don't have.
I hope this is usefull, I was concerned when you only mentioned skimming the head without taking the other figures into account.
Clive W Cheesy

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Savage_Greg

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Re: Exhaust port
Reply #46 - 03/11/07 at 08:46:04

LANCER wrote on 12/31/69 at 16:00:03:

This dude Perry Kime has some pretty good stuff on his resume so I thought I would try to replicate his technique. We shall see if I screw it up or not...that is why the stock head is sitting patiently on the shelf.

Yeah, you've got back up. When I commit, my butt is on the line Tongue

I used to have a resume...and I used to have to calculate pressure drops and friction losses in piping and valving. Gases and liquids have a few similarities

The other guy's background is good, but like anything, I take it on advisement. I may tackle the exhaust port a bit more, but I'm happy with the intake.

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LANCER

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Re: Exhaust port
Reply #47 - 03/11/07 at 11:10:20

klx650sm2002 wrote on 12/31/69 at 16:00:03:

Hey Lancer
It would appear that you are going to take too much off the head, My figures were the amount to be taken off the barrel not the head,but this was only if the squish clearance is .050" to .060"
The total amount you can take off the barrel + head is dependant on the figures you need from your cam manufacturer which I don't have.
I hope this is usefull, I was concerned when you only mentioned skimming the head without taking the other figures into account.
Clive W Cheesy

I was speaking of the amount to remove from the head, nothing from the head.

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tbalam Full Member Offline I like my kids, but I love my bike ;) Posts: 172 Fac o' the Sn Gender:	Re: Exhaust port Reply #48 - 03/11/07 at 20:01:32 I think this is great. I know that on a v-6 or 8 you can expect some fairly large hp gaines. How much can you expect on a single cylinder? I am sure 2-5 hp, but would you really be able to feel the difference, especially with the gearing problems that we have been talking about?
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Savage_Greg

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Re: Exhaust port
Reply #49 - 03/11/07 at 21:22:16

LANCER wrote on 12/31/69 at 16:00:03:

I was speaking of the amount to remove from the head, nothing from the head.

Well, I'm proud to say that I've spent another afternoon grinding in the exhaust ports. The left side exhaust valve is the worst one. Much longer distance from the valve to the outlet, but I can now stick my finger all the way through.

I also managed to get over my worries about grinding through the valve seats...those ports are really sad when you get to looking close. The right valve clearly has better flow than the left one. Shorter distance and more direct.

More tomorrow after I polish.

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Savage_Greg

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Re: Exhaust port
Reply #50 - 03/12/07 at 22:39:10

I've got the exhaust port opened up to where even Lancer and Clive will like it now Tongue

But in the process I thought that I'd get some figures together concerning the Savage exhaust.

Some of these are hard to believe but numbers don't lie Tongue

First of all, calculating the area of both exhaust valve seats with an ID of .900" (and subtracting the area of the 2 valve stems), the maximum exhaust area for 2 stock exhaust valves is 1.100 in sq.

Then figuring the area of the stock exhaust port with an ID of 1.340 ", we get a total outlet area of 1.409 in sq.

Then figuring the area of my new exhaust port with an ID of 1.437", we get a total outlet area of 1.618 in sq. (Almost 15% larger...)

Then in figuring the area of the Raask pipe with an ID of 1.500", the total area is 1.766 in sq.

Now my exhaust port ID is only 1/16" less than the Rassk.

I forgot to measure the stock header. Anyone got that ID number?

I can almost poke my fingers through the exhaust port and out the valve seats Grin

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Reelthing Serious Thumper Alliance Member Offline Fish or ride that is the question Posts: 5397 Houston,Tx Gender:	Re: Exhaust port Reply #51 - 03/12/07 at 23:19:19 Spare in the garage I'll go measure it - seems to me it funnels in a bit as double wall takes over - how far past the inlet you want a measure? By the way that sure is shinny cylinder head in the sig now
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LANCER

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Re: Exhaust port
Reply #52 - 03/13/07 at 04:57:56

LANCER wrote on 12/31/69 at 16:00:03:

I was speaking of the amount to remove from the head, nothing from the head.

Man, do I sound stupid ... "from the head, nothing from the head". Lips Sealed

What I was trying to say before my nether brain got in the way was, I will be removing metal from the CYLINDER and not the head. Roll Eyes

That took a lot of effort to finally get it out the right way. Undecided

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LANCER Serious Thumper Alliance Member Offline Savage Beast Performance Parts Posts: 10661 Oklahoma Gender:	Re: Exhaust port Reply #53 - 03/13/07 at 05:03:08 Are we having fun or what ??
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Savage_Greg Serious Thumper Alliance Member Offline Don't go around your ass to reach your elbow... Posts: 7844 SW Washington State Gender:	Re: Exhaust port Reply #54 - 03/13/07 at 05:46:12 LANCER wrote on 12/31/69 at 16:00:03: Are we having fun or what ?? I'll have what he's having
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Savage_Greg

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Re: Exhaust port
Reply #55 - 03/13/07 at 05:51:22

Reelthing wrote on 12/31/69 at 16:00:03:

Spare in the garage I'll go measure it - seems to me it funnels in a bit as double wall takes over - how far past the inlet you want a measure?

By the way that sure is shinny cylinder head in the sig now

I used a telescoping gauge and just got the minimum diameter in the Raask. I guess that it begins about 3/8" from the flange....same diameter all the way through except for the packing and baffle.

Here are all three ports together.

The first was actually 1.340".

This is my first try...

And this after I got my stuff together...

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Savage_Greg

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Re: Exhaust port
Reply #56 - 03/13/07 at 05:54:39

Reelthing wrote on 12/31/69 at 16:00:03:

Spare in the garage I'll go measure it - seems to me it funnels in a bit as double wall takes over - how far past the inlet you want a measure?

By the way that sure is shinny cylinder head in the sig now

I got some better polishing compound (the cheapy stuff from Harbor Freight was dried out) and had a second go at it. Much shinier now....

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