SuzukiSavage.com - Exhaust port print

zevenenergie Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1223 The Netherlands Den Haag	Exhaust port print 09/19/19 at 10:43:09 Experimented today with the head that I bought a few days ago Here is the broken valve. I want to flow my head but I don't have a flow bank. I want to see what the exhaust port looks like and where exactly I have to remove something to get a better flow. Here I pour some molten mold material into the outlet port. Here the result:
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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28362 Tucson Az Gender:	Re: Exhaust port print Reply #1 - 09/20/19 at 06:57:08 I can't imagine how you got that out of there...
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MMRanch

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Re: Exhaust port print
Reply #2 - 09/20/19 at 08:50:09

I can't imagine how you got that out of there...

* 2

Huh

....................................

Lancer has supped up one of his bikes (REX) to the point that it don't even feel like a Savage , but more like a race bike. I only rode it once but it was very impressive. So , I know the potential is there , if you can find it. Wink

So zevenenergie , your going to stream-line the exhaust flow ?
Here is another question for ya : Is there a way to design the exhaust (header/muffler) to pull a vacuum on the header-pipe ? I've seen the inside of the exhaust chamber and it looks "roundish" instead of "stream-line"
On the intake side I believe Suzuki already has the "Twin-Swirl" flow going on , I think Yamaha pioneered it but they all have it now if they want it.

I was ridding with a bunch of big cruisers last weekend and wanted to pull over at the "scenic overview "one mile ahead"" from 5th in line , ridding double , going up hill , I had power to catch the leader and tell him I wanted to stop at the over-view before we got to it . I did have to kick it down into 4th to make it happen ... but that's how stock engines are . Embarrassed

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stewmills Serious Thumper Offline Imagination is more important than knowledge Posts: 2626 Auburn, AL Gender:	Re: Exhaust port print Reply #3 - 09/20/19 at 09:16:27 I'm going with, it's probably a 'rubbery' latex version. If I recall correctly, rubber is slightly more flexible than hard, dried wax...but as soon as those folks storming Area 51 this week break in and release the cosmic wave machine and aliens who the h*ll knows what physics it will alter in our universe.
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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 17783 Camp Springs, Kentucky Gender:	Re: Exhaust port print Reply #4 - 09/20/19 at 10:48:12 That "flow path" is downright ugly. Suzuki could not have made a more crookedy, convoluted passage if they had tried (or maybe they did try). It is no wonder this engine runs out of steam as the rpm increases!
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Ruttly Serious Thumper Offline Thumpers Rule Posts: 4997 Manteca , CA Gender:	Re: Exhaust port print Reply #5 - 09/20/19 at 14:44:54 What do you call this casting goo ? Brand name ? Where did you buy it ? This should be used on every engine build. Before and after port work. Once it is properly trimmed you could see the difference by how much water it displaces , how much was removed during port work. Lawn mowers have better ports than the Savage !
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zevenenergie

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Re: Exhaust port print
Reply #6 - 09/21/19 at 03:27:58

@mmranch
Yes, the intention is to flow the port. but I've never tuned a 4-stroke before, so can't answer your questions. I do have experience with boosting 2-stroke engines. That is much more complicated, but very easy in terms of implementation.
I already read that the port needs to be filled up a bit, but I am looking for a suitable material.
In any case, I have been able to measure that the material in the bump is 6.5 mm thick. I've already removed 4mm from that. and I have removed material around the valve guides.

I have looked at the performance parts that lancer make, s and sells. That stage 3 camschaft makes me greedy Tongue

Has anyone tried a turbocharger?

@ Ruttly
Its Vinamold, a rubber like material. It melts as you worm it up and gets hard wen it cools down.
I use it al the time
https://vespa-ciao.nl/forums/topic/vinamolt-red/

I bought it it in England
https://www.ecfibreglasssupplies.co.uk/product/vinamold-red

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Dave

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Re: Exhaust port print
Reply #7 - 09/21/19 at 04:54:30

DragBikeMike has already been experimenting with the filler - so far he has found material that will hold up for the intake port - but not in the exhaust. You should read his thread, as he has been doing flow testing.

Nobody on the forum has turbocharged - but one member has used a supercharger. It took a while for him to get it working - ultimately he got it to work OK...but did have issues with detonation and heat.

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zevenenergie Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1223 The Netherlands Den Haag	Re: Exhaust port print Reply #8 - 09/21/19 at 05:19:24 Tanks Dave, if read Dragbike mike,s tread and found it very educational.
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LANCER Serious Thumper Alliance Member Offline Savage Beast Performance Parts Posts: 10585 Oklahoma Gender:	Re: Exhaust port print Reply #9 - 09/21/19 at 10:25:08 IS THE Vinamold you used to make the mold stable over time ? HOW long can it sit on the bench without degrading ?
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