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second one...
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Third one...
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fourth one...
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thats pretty good https://www.nopistons.com/forums/pub...IR#>/bigok.gif
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Originally Posted by rotary fury' date='Jul 23 2003, 09:21 PM
thats pretty good https://www.nopistons.com/forums/pub...IR#>/bigok.gif
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Ok guys, the pics showing the secondary ports....well the floor is not level, but I still think (after seeing the pics) that the ports aren't equal on size, at the intake manifold side.
I really want some opinions, criticism, suggestions\tips! This is my first time porting, by now you can tell I SUCK at arts (drawing), and my pulse is no better than a 60 years old man https://www.nopistons.com/forums/pub...O_DIR#>/11.gif TIA! |
You just gotta be careful you don't go too far down when you extend port the plates or the overlap will be very large.
Same goes for the exhaust ports when you do them, except don't go up by much and don't make them wider. Have fun! |
Originally Posted by andynogo' date='Jul 24 2003, 12:55 AM
You just gotta be careful you don't go too far down when you extend port the plates or the overlap will be very large.
Same goes for the exhaust ports when you do them, except don't go up by much and don't make them wider. Have fun! I am actually using the RB templates, wich are useless for the lower part of the port (on the rotor side\face). I mean, the secondaries goes deeper from the factory than the template, and on the primaries, the template just goes too low for IMHO! More pics comin in this weekend https://www.nopistons.com/forums/pub...IR#>/bigok.gif https://www.nopistons.com/forums/pub...1047683329.gif |
looks good! keep the pics coming.
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Nice job. The ports look big enough.
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Can't really tell from the photos, but you haven't gone sideways much, have you? Gotta be careful of the outer oil ring and corner seal tracks... https://www.nopistons.com/forums/pub...#>/biggrin.png
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Originally Posted by andynogo' date='Jul 25 2003, 11:17 AM
Can't really tell from the photos, but you haven't gone sideways much, have you? Gotta be careful of the outer oil ring and corner seal tracks... https://www.nopistons.com/forums/pub...#>/biggrin.png
Those were my fisrt ones https://www.nopistons.com/forums/pub...1047683358.gif |
Gotta learn sometime! I've done that too- that burr can kinda run away with you. Once I put a long gouge across the face of the plate when it skipped out of the port! Lucky it was an old junker plate https://www.nopistons.com/forums/pub...#>/biggrin.png
Pretty good for your first effort though https://www.nopistons.com/forums/pub...DIR#>/cool.png |
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UPDATE!!
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More!
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Even more!!
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Still more pics!
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Almost there!
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Last one!
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break the edge on the exhaust ports. you will notice a little bit of a chamfer on the stock ports.....mimic that on the new ones or you'll have problems with the apex seals in the future. you don't want to have such a sharp edge where the seal travels across, especially when it is closing the port.
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You might take the noses out a little further for a tad more free port volume without changing the timing . . . but the volume looks big enough anyways to not make it much of an issue.
Anyone care to explain the assumption that taking the tail of the port down causes more overlap? The back of the port is the opening edge that effects overlap . . . Here is my first try at porting (went in to the oil track by accident): |
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