Tangerine EVO, - Six Header Update Options

[TravisNeff]

Are you planning to do any pre-post dyno work?

[ChrisFoley]

Are you planning to do any pre-post dyno work?

Not quite sure I understand the question. I've already posted about the new product.
If you mean, am I going to get dyno results before offering the product for sale - the answer is no. I plan on dynoing the car that I am putting the protoype on but I am not doing any comparative testing. Quite frankly, I expect the price would go up if I relied on the dyno data to set my sales price. S-Car-Go has a 914-6 stainless header set that is $3300. That's just for the header. The primaries are too long and the secondaries will be way too short if you go straight from the collector to the banana muffler inlets.
I expect to offer my complete exhaust system at around $2300-2400 and I will accept pre-paid advance orders through Christmas (2009) for just $2000.
I'll be posting more pictures as progress continues over the next few days. The muffler is being assembled right now. (IMG:style_emoticons/default/smile.gif)

[ChrisFoley]

Here's a view of the partially built protptype muffler being test fitted to my car. So far everything is perfect. The muffler will weigh 27 lbs vs. more than 28 for the Dansk 2 in - 2 out we have here.
I think everyone elses mufflers have only one inlet size. Ours will be sized to match the header it goes to.

[ChrisFoley]

Muffler's done. It will fit behind a WEVO 915.

[jgara962]

Any thoughts to making that same looking muffler but for a 4?

[ChrisFoley]

Any thoughts to making that same looking muffler but for a 4?

I believe I can make a nearly identical muffler that connects to modified SSI heater boxes. The result will be a 100% stainless exhaust with the stock heating system completely intact and power gain comparable to installing a European Racing Header.

[736conver]

Looks like an MK exhaust muffler.

[Mark Henry]

Is there a reason that most N/A systems are done (2 X) 3 into 1 and then into a muffler? (IMG:style_emoticons/default/confused24.gif)

I was expecting more of a a 6-3-1 header system like a 4-2-1 on a /4

[ChrisFoley]

Looks like an MK exhaust muffler.

The only thing in common is the 6" diameter shell.
Beyond that there is very little resemblance.

Is there a reason that most N/A systems are done (2 X) 3 into 1 and then into a muffler?

The firing order of a six essentially means the two banks of cylinders form independent 3 cylinder engines tied to a common crankshaft and out of phese from each other. A 6-2-1 exhaust would provide minimal added torque benefit for the difficulty of fabricating an effective header. It would be a little easier using the pipe lengths of a race exhaust for engines revving up to 9K rpm.
Two independent 2-1 headers is not beneficial to a Type 4 based on the cylinder firing order.

[jgara962]

Any thoughts to making that same looking muffler but for a 4?

I believe I can make a nearly identical muffler that connects to modified SSI heater boxes. The result will be a 100% stainless exhaust with the stock heating system completely intact and power gain comparable to installing a European Racing Header.

Sorry, I should have been clearer. A simmilar looking muffler that connects to a header. I have what I think is a stock muffler that someone converting into a GT style. I think it looks super cool and is loud which I also like, but I have a set of headers that I'm going to install, but ideally would like to retain the GT look. Sorry if this is highjacking the thread.

[ChrisFoley]

A simmilar looking muffler that connects to a header.

not likely gonna happen for a 4 cylinder header.

[JmuRiz]

Looks top notch, as always.

Man a 3.2 with a 915 trans, those headers and muffler...that's one cool 914/6.

FWIW: I think your 4-2-1 header for the 4 is cool, totally sleeper, looks bone stock from outside (IMG:style_emoticons/default/wink.gif)

[Mark Henry]

Is there a reason that most N/A systems are done (2 X) 3 into 1 and then into a muffler?

The firing order of a six essentially means the two banks of cylinders form independent 3 cylinder engines tied to a common crankshaft and out of phese from each other. A 6-2-1 exhaust would provide minimal added torque benefit for the difficulty of fabricating an effective header. It would be a little easier using the pipe lengths of a race exhaust for engines revving up to 9K rpm.
Two independent 2-1 headers is not beneficial to a Type 4 based on the cylinder firing order.

Cool! just wanted to know (IMG:style_emoticons/default/smile.gif)

[ChrisFoley]

Here's what the new muffler will look like with SSI heat exchangers on a four cylinder. The rear flanges of the SSIs will be removed and the pipes altered to connect with the muffler, which will be moved a little closer. The one shown is set way back to clear a WEVO on a -6.
By separating the primaries from each other it should be easier to seal them against the heads.
All 4 primary pipes will enter the muffler separately to eliminate negative sound reflections from going up the wrong pipe, and maintain the shortest possible lengths. Even though the pipe lengths will be unequal, I predict that this will produce more power than anything short of a full header system.

We should have the test system completed in a couple of days.

[McMark]

(IMG:style_emoticons/default/smiley_notworthy.gif)

Looking forward to that stocker. (IMG:style_emoticons/default/aktion035.gif)

[jhora]

watching the progress...thanks Chris...

[Sparky]

*SIGH* I was hoping this was the base and collector for that custom hookah I wanted. (IMG:style_emoticons/default/sad.gif)

[Gint]

Cool!

What's the plan for having the buyer modify stainless steel HE's for flanges to match the muffler? Wouldn't it be easier to have the flange on the muffler match the HE instead of the other way around? The HE already keeps the outlets separate for each cylinder. I've no doubt that you have a reason for doing it this way. Just curious what that is. Looking at it and reading your last post again it probably has something to do with bringing the muffler back in closer to the HE's?

[ChrisFoley]

What's the plan for having the buyer modify stainless steel HE's for flanges to match the muffler?

There are a three options. Send your HEs to me for modification, trade them for one's I will have in stock already altered, or get it done locally.
The ones pictured are 1.7-1.8L and are too long for where I think the muffler should be positioned. 2.0L HE's are shorter but don't have the bend that brings the flange up to the appropriate height for my muffler. Both are identical to just behind the HE jacket.
Welding two inlets to my muffler so close together and with a big flange so close to the muffler body would be a real challenge, and they really wouldn't be separated enough to fully isolate the acoustic signal IMO.
By moving the outer pipe further out I shorten the longer pipes just a little more and make assembly much easier. At least that's the plan so far. We've started assembly of a new muffler but everything isn't set in stone yet.

[ChrisFoley]

On the six cylinder front:
Yesterday I realized that I don't have enough secondary pre-bent material in stock so I have to place an order for more J-bends.
I tack-welded the first primary pipe this morning.