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-   -   question about nonsequential (https://www.rx7club.com/3rd-generation-specific-1993-2002-16/question-about-nonsequential-661876/)

mr.veilsidewankel 06-13-07 06:08 AM

question about nonsequential
 
ok, have a couple of questions
if i welded the secondary wastegate door shut, what would that do?

allso, how much will a ported engine help with spool?(medium street, exhaust port opened 5mm on each side)

Eggie 06-13-07 11:03 AM


Originally Posted by mr.veilsidewankel (Post 7037986)
if i welded the secondary wastegate door shut, what would that do?

Which door? There's one wastegate, one pre-control and one turbo control. The last one is in the exhaust manifold, not the turbo assembly.

dgeesaman 06-13-07 11:05 AM

The ported engine definitely helps with spool.

Dave

mr.veilsidewankel 06-13-07 11:23 AM

the one in the manifold is removed.
the wastegate i ported,
its the exhaust door on the secondary turbo i welded shut(just tacked the actuator rod on the outside)

Eggie 06-13-07 08:06 PM

That's the pre-control door, which is normally open above 4500rpm. I've read that welding it shut works fine for NS, but have no direct experience.

rajeevx7 06-13-07 08:21 PM

You don't weld it shut, but full open. You are talking about the pre-control door, right? Use a 12mm to remove the two screws and pull the inspection/install door and weld it steady when it touches the door.

mr.veilsidewankel 06-14-07 03:52 AM

the thing is that it is already welded shut, and the turbos are installed.
what exactly will welding it shut do?

rajeevx7 06-14-07 08:53 AM

Unecessary lag

GARCO MOTORWORKS 06-14-07 12:04 PM

I weld the hole closed but I also close the port in the exhaust track from the prespool chamber .I reshape the port by welding the port in the low side and grind the shape to flow better . With this done you get flow from one direction instead of a flow comming into the main stream to upset the moving stream of gasses .Hard to explain but this is a big part of the rich mans non seq .


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