2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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did some porting today:

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Old 07-08-05, 05:51 PM
  #26  
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My suggestion is to make a new thread about your problems to get more of a response.
Old 07-08-05, 05:58 PM
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yeah, that looks pretty sweet. Those secondary runners are massive. All you used was a wire wheel on a dremel to get it smooth? I used some sanding wheels on mine and it didnt come out nearly that well. Also, did you use templates or is this your own creation?
Old 07-08-05, 09:48 PM
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i used a stone bit to take away the material, and sanding bits to smooth it out, then a wire wheel to do the finer smoothing.
Old 07-08-05, 09:54 PM
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yes ddub, i have not beveled the opening edge of the exhaust port, i wasnt aware that was needed...

Last edited by jacobcartmill; 07-08-05 at 09:59 PM.
Old 07-08-05, 11:21 PM
  #30  
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Probably not needed, but in stock form there is still one, so I added one just for the hell of it on my exhaust ports.
Old 07-08-05, 11:25 PM
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word up, my brethren.
Old 07-09-05, 12:18 AM
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Yah do a 2mm bevel. otherwise your apex seal will catch.. Awsome reading below...

http://www.nopistons.com/forums/inde...howtopic=31895
Old 07-09-05, 03:21 AM
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i have a hard time believing an apex seal will catch on the opening edge of the exhaust port... the closing edge, definitely understandable... but the opening edge?
Old 07-09-05, 03:25 AM
  #34  
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Originally Posted by akileez
hi there,
my name is achilles and I have an '88-7. The motor in it went out at 198k miles and I went to the junk-yard to get another one to drive in the main time until I can put some money together to but a new engine. I am done with the engine swap but for some reason the car would not stay running. It cranks and then dies after about 5-10 seconds of starting. I have tested for spark, fuel, compression, timing, and then some and still cannot find out what is wrong. can you please help me out with some suggestions?

8's,
achilles.
Check the Check engine Light is it on .. if so retrieve the code might be a sensor out or huge vacuum leak
Old 07-09-05, 11:33 AM
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Originally Posted by KNONFS
Looks nice!

What templates are you using?
Old 07-09-05, 02:11 PM
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Kahren made the templates for me.
Old 07-10-05, 03:04 PM
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all porting is done. finished the exhaust last night. now i just gotta repolish the exhaust and clean up the primaries a little bit. i'll post some pics up tonight
Old 07-15-05, 05:28 AM
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rx7 is running. i will post lots of pics and videos for your viewing pleasure
Old 07-15-05, 10:12 AM
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Originally Posted by jacobcartmill
rx7 is running. i will post lots of pics and videos for your viewing pleasure
Can't wait....you did an awesome job it looks like.

Im not going to be brave enough to do it yet. Ill wait till I have some unusable parts before I try it.
Old 07-16-05, 03:46 PM
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videos and pics tonight
Old 07-16-05, 04:30 PM
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that was quick, ive had ported housings at the shop waiting to go back together for months!
Old 07-16-05, 08:22 PM
  #42  
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I can't wait to do some serious porting on my spare housings. I have 2 engines laying in the shop to tear down and reassemble as a running engine.

I am no expert on what is good/bad for porting.......but I like what I saw in your pics. Good job!
Old 07-16-05, 08:40 PM
  #43  
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i bevel the side and closing edges, and make sure there is no burrs in the leading edges, that is all.
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