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I know this link is not what you would expect. But trying to make something work that has not been changed in a decade or more is challenging. You just have to think out of the box. The relevance to engines is the same, so stick with me and you will see what I'm seeing...

Yea that's what it looks like to me. Plus the exhaust never becomes one pipe. The two pipes only merge at the muffler and that is a dual in and out. I've asked why it's that way. The answer I got was it makes more hp/tq @ a lower rpm range. Making it more usable and enjoyable to drive. Makes...

Ma70.Ent pm sent. Please delete any misinformation in this thread. Please leave amichie posts and my last post prior to this in-tack. Thanks

Yup:biglaugh: But I'm going to scrap this idea, because I am indeed wrong here. The BS flag crap fired me up and I talked to a very good friend of mine, who has built countless cars. He said what is the proverbial best inline six out there? That was easy BMW E36 in an M3 my nemesis. He proceeded...

Straight from Burns Stainless. "Various exhaust designs have evolved over the years from theory, but the majority are still being built from 'cut & try' experimenting."

It is not correct. When number 1 fires the next cylinder in order is number 5. Not number 2, left alone we have an odd fire in that collector. So number 2 fires in it's current position four cycles later!? To be pulled out of the collector by what cylinder? Number 4 in another collector...

Yes and yes, I was like DANM! The length.. I see what your asking this is going to be a modified Pacesetter. The 32" primaries will be the long tube header 1 5/8" primaires with a Burns 6 into 1 for "Mythical". That other place is out of this world $$$$$. Never thought I would find someone...

I agree a 100%. You can get very low gears but a modified GTE tranny is needed, but that's another tread.....sorry back on topic.

Cut the flanges off today and fixed the primaries (2,5). Really we heated the #2 and moved to the #5 spot. We cut #5 off at the flange and ran it under everything to the #2 spot. Not too bad, this is just a mock up to see what is what. I have my shapes know I have to make the final pipes. The...

First thing is to fix the routing problem with cylinders 2 & 5. I will probably replace the collectors with a merge style to increase the velocity. I like this site, I'll give them a call in the morning. Page thru till you see the 6 into 1 collector:aigo...

That's what I thought on the flange...just said okay thanks and hung up. The collector is $350 from Burns (mild steel), should I even mention $$tainless! That would be great I'm going to take a look at my car sometime tomorrow.

You think? I mean it will be shaped similar to the Pacesetter. Yea, but that is the good stuff. Is there anyone here who makes the exhaust flanges? My guy wants $250-275!

OK, I just got off the phone with Burns. Just in material(mild steel), I will spend close to $800. Flange included in that price from a local machine shop(they are very high). But very good I used them when I turbo charged a Sentra..any way. I wanted to get an idea what using the best would...

Hey thanks, this is some really useful information. It has also made me think the basic design for the Pacesetter has been used since MKII days. They just changed it to work on a MKIII. As with the other makers. The Trust/GReddy is just typical of them doing a little extra to out pace the...

Nice header, I wonder how much hp/tq we are leaving on the table with the collector/primary issue

Longest primary on the Pacesetter is 21" (#1). I'm going to make them atleast 31", pulled this from the SS header link. "On today's cars, with space virtually nonexistent, crossing four tubes either under the oil pan or around the front or rear of the engine presents major problems. On...

Oh yea since our firing order is 153624, it's wrong and we are loosing out. Really a long tube header suites a 7M N/A, shorties work but we need every little bit. Your right it's got to be a manufacturing thing. The "equal length" idea is a little over used. We can make this right and not...

Looking at Tanya's Trust header number 2 and 5 aren't right. I'm thinking old design (made prior to the knowledge of pulse firing), or ease of manufacturing. Also be inherit design the 5/6MGE headers will have larger primaries, the ports are bigger I believe. If I'm right, first step for a 7M...

I hear you guys throwing hints at me..Who makes exhaust flanges on for the turbo guys?

Let me add a little: Collector #1 creates a pulse (vacuum) of it's own Which helps Collector #2 get started. So you see have if there are two cylinders out of sync it causes a train wreck so to speak.