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91 240
01-09-2002, 02:00 PM
does anyone have any info on what needs to be done for this. I know on one of the collectors the wall is thin and was curious to what would be "too much"?

Thanks
Avery

Mark slide squad
01-09-2002, 02:05 PM
I know a guy who got a pulsar gtir stock turbo exhaust manifold extrude honed, he only picked up like 4hp on the dyno. Not worth it. Just spend the money to get a nice tubular one, just on stock turbo you can pick up 20+hp using a nice aftermarket manifold designed for use with the T25/T28 flange that keeps the turbo in the stock mounting position.

<BLOCKQUOTE><font size="1" face="Verdana, Arial[/img]quote:</font><HR>Originally posted by 91 240:
does anyone have any info on what needs to be done for this. I know on one of the collectors the wall is thin and was curious to what would be "too much"?

Thanks
Avery<HR></BLOCKQUOTE>

ADAM HUTCHINSON
01-10-2002, 06:12 AM
too much is when you break into a water channel(on a head)..i know i did it http://www.freshalloy.com/ then you have to get it welded up...

you are talking about port matching? usually you do not port match the exhaust manifold...just the intake manifold...

here is a good site for a start http://www.freshalloy.com/

hope it helps

i am working on a KA head right now...with port matching of the intake

[ 01-10-2002: Message edited by: ADAM H ]

Mark slide squad
01-10-2002, 06:42 AM
Adam,
He isn't talking about port matching, he is just talking about porting out the whole exhaust manifold for better flow, because the stock sr20det manifold is restrictive.

<BLOCKQUOTE><font size="1" face="Verdana, Arial[/img]quote:</font><HR>Originally posted by ADAM H:
too much is when you break into a water channel(on a head)..i know i did it http://www.freshalloy.com/ then you have to get it welded up...

you are talking about port matching? usually you do not port match the exhaust manifold...just the intake manifold...

here is a good site for a start http://www.freshalloy.com/

hope it helps

i am working on a KA head right now...with port matching of the intake

[ 01-10-2002: Message edited by: ADAM H ]<HR></BLOCKQUOTE>

01-10-2002, 06:53 AM
SCC did some work on their 300ZXTT manifolds that might be applicable to an SR manifold. Most notably, they had their engine builder fill in the wrench clearance notches and whatnot with TIG weld filler (on the outside of the manifold) and then he ported out much of the material on the inside. I know my KA manifold has some ugly notches and bumps and such, is the same true on the SR?

Asad

ADAM HUTCHINSON
01-11-2002, 12:10 AM
is that what those notches are for..i was wondering.. i thought they may have something to do with air flow.....i really smoothed them out

ohh here is that link
http://www.sa-motorsports.com/diyport.htm