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Author Topic: porting  (Read 1600 times)

Offline Paul Chernoff

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porting
« Reply #15 on: January 31, 2005, 03:40:45 pm »
Get one of these and a air die grinder, makes quick work of it, its how i did all mine.
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Offline Andrew Scott

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« Reply #16 on: January 31, 2005, 05:32:07 pm »
Quote from: "marke bailey"
I thought I'm supposed to leave the deflector part in the collector?


I knife edged mine (make them thin and sharp)
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Offline Robin Toor

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« Reply #17 on: January 31, 2005, 09:04:43 pm »
Quote from: "Andrew Scott"
Quote from: "marke bailey"
I thought I'm supposed to leave the deflector part in the collector?


I knife edged mine (make them thin and sharp)


I think the deflector is used to seperate the exaust flow from cylinders 1 and 4 with 2 and 3. I don't remember why this is good exactly but I do remember you are supposed to keep it. I think it was either Lowell or Ryan Lore who explained why in a thread a while back.
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Offline John Hartman

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« Reply #18 on: January 31, 2005, 09:59:14 pm »
something to do with keeping the pulses togeather I think.
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Offline Mike Schmid

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« Reply #19 on: January 31, 2005, 11:16:34 pm »
Regular header design involves plumbing so that the exhaust pulses from the different cylinders meet up with the right timing.  It's something to do with the vacuum behind the shockwave pulse helping to pull spent mixture from the next cylinder in the sequence thus increasing scavenging.  I don't think it's as critical in a turbocharged application because new mixture is coming into the cylinder under pressure at >100% volumetric efficiency.  That and I think you get more gain from keeping the turbocharger as close as possible to the exhaust ports, thus maintaining maximum exhaust temperature and kinetic energy than you do from optimal pulse timing.  At least that's what I would suspect.  *shrug*
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Offline Marke Bailey

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« Reply #20 on: February 01, 2005, 07:04:31 am »
yeah, I thought I should keep it so I did. I did my port on the runners and ring flange. I didn't really take any meat off the runners, just smoothed them out a bit. I did grind away the whole ring flange tho. I'll post pics later.
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Offline Marke Bailey

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« Reply #21 on: February 02, 2005, 01:44:14 pm »
pics.


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Offline Nathan Tralenberg

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« Reply #22 on: February 02, 2005, 02:12:42 pm »
looks good! Does anyone know what kind of gains you can recieve from a exhaust manifold porting???. I under stand the flow and everything is increased but any real horse power gains??  :?:
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Offline mike griffin

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« Reply #23 on: February 02, 2005, 06:51:58 pm »
after mine was done, i noticed a extreme gain. my front end lifted up WAY more than before. But thats mostly because my gasket protector ring had melted/became dislodged, blocking alot exhuast flow to the turbo and wastegate. I g teched my car before and i was making 116hp at the wheels. Disgusting. Now im making 210 on stock boost, and my only upgrade after the porting was my L&R uicp. I dont really trust the g tech though.
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Offline Robin Toor

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« Reply #24 on: February 02, 2005, 09:16:25 pm »
Quote from: "marke bailey"
yeah, I thought I should keep it so I did. I did my port on the runners and ring flange. I didn't really take any meat off the runners, just smoothed them out a bit. I did grind away the whole ring flange tho. I'll post pics later.


Good job! That's looks awesome! Good on you for taking it on yourself, true DSM style :thumbs:
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Offline Marke Bailey

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« Reply #25 on: February 03, 2005, 06:57:52 am »
:oops: stop it, I'm blushing.
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The Sleepy Slushbox.

"She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself."
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