[DeTomaso] 400 Exhaust

[Will Kooiman]

In the previous headers, you paired the center pipes.  That's not correct.

You are supposed to pair 1&2, 3&4, 5&7, 6&8.  I'm not surprised that you
got lean/rich cylinders.  That's like using a camshaft with more lift on
some cylinders than others.

I don't think it matters W vs. C firing order.

Your current headers shouldn't have lean cylinders, but you don't have any
scavenging.  I suspect that it's going to sound weird, but that's fun of
tinkering around.

BTW, you know that 3" pipes fit very easily using the normal routing
through the suspension, right?  With your fab skills, it should be a piece
of cake.



On 9/4/12 11:39 AM, "gow2 at rc-tech.net" <gow2 at rc-tech.net> wrote:

>Well I am playing with some things. First I wanted to get the exhaust over
>the suspension so I can increase the volume. I did not want 180's because
>I may want to come up with a make shit trunk at some point.
>
>180's are awesome as you can pair the correct cylinder which is something
>you can never do with a right L/R system due to the firing order.
>
>I originally built these to go over the suspension but the firing
>order/back pressure left every other cyl lean:
>
>http://www.rc-tech.net/cars2/panttransam/hpold.jpg
>
>You can never get an optimum system with the firing order so what I
>decided to do, since this was an engine based on lots of torq I decided to
>run each primary to the rear and collect them as far down as I could.
>
>The butterfly is just so I can play with back pressure.
>
>I can't wait to hear it on the car. On the stand the sound is fantastic
>and I think it has to do with being in earshot of each cyl exit in the
>can.
>
>Gary
>
>>
>> In a message dated 9/4/12 9 22 40, b.hower3400 at yahoo.com writes:
>>
>>
>>> I agree with David, I would vote for the chrome tips.
>>>
>>
>> FWIW, me too!
>>
>> Gary--can you explain how your mufflers are designed to work?   They
>>look
>> very complicated and I'm sure there's lots more going on there than
>>meets
>> the
>> eye?
>>
>> Mike
>
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