 | » Ezine | | Want to receive a monthly Ezine with great content? Subscribe here. | | Porting! Posted in Motor Tutorials  | | 
03-02-2009, 12:24 PM
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I work so the cylinder head. ok?  |
03-02-2009, 12:25 PM
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03-02-2009, 12:34 PM
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03-02-2009, 02:56 PM
|  | Senior Member | | Join Date: Oct 2007 Location: Brisbane, QLd Australia
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what are the three groves?
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03-02-2009, 03:47 PM
| | Senior Member | | Join Date: Nov 2008
Posts: 270
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i think those groves are to help direct air flow. i've seen it done in engine blocks and its meant to work well when done correctly. i could be wrong though
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18-02-2009, 07:06 PM
|  | Certified MR Member | | Join Date: Feb 2009
Posts: 1,405
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Originally Posted by Mack  Yep, the two springs are stock. I'll warn you now, the only major drama doin this without a spring compressor is gettin those little barstard retainers back in. It needs great patience or save yourself the drama and when your ready go to any bike shop and get them to pop them in. Its 2 mins with a compressor.
Yes the ports have a bit of machining from the factory at the opening. The ducars I have seen have been opened out wide in this spot but then use a way undersized gasket and block the flow. | simple compressor...find a nice g clamp and have a look at a real compressor and then! look at your angle grinder...itll make sense  worked on my old postie a treat
keep that intake roughly finished while your there...
i also have tried an alloy gasket(go the bundy rum!!!!!!) but intentionally made the hole too small...trim this dag into vanes, that get the air to spiral as it flows through... tricky part is...which way to twist them?
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18-02-2009, 07:13 PM
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Originally Posted by sumppa I'm aware of that all. I didn't actually make the ports a lot bigger, i just smoothed the floor and rised the roof. The floor should have been built up with chemical metal but i was too lazy  .
The ports of my 150cc road-legal bike look just the same, guides ground off, and no problem after 5000km.
I may have smoothed the intake a bit too much, yes.. It just looks good like that  . It is still far from a mirror finish. | ive tried really hard to have a look inside my intake while actually running the engine, and for some reason, i cant do it ie, who cares what it looks like when its bolted together? its how it improves performance that counts...
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02-05-2009, 06:09 AM
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There! Now I have read this whole ****ing topic! hehe xD You will really learn a lot of porting by reading this topic. And thanks to Mack for gd input! But about the "homework" link, I think this motoman from mototuneusa has ritierd, I think it's a old website..
I read about porting at wikipedia, and exept from a lot of words, it really was gd, so chekk it out; en.wikipedia.org/wiki/Porting_(engine)
Peace to us tuners xP
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18-06-2009, 08:01 PM
| | Member | | Join Date: Jun 2009
Posts: 51
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hey guys could someone put some pics up to help me with the porting process.cheers
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Porting!
