[DeTomaso] 400 Exhaust

[gow2 at rc-tech.net]

> That's what we call learning.
>

Yes it is. I just wish I would have ran the engine and did the learning
before having them ceramic coated. I guess I will have to hang them in my
basement when I fix it up. Maybe I could make lamp post out of them.

When the car is done and running, making different headers would not be
much for me to do when that is the only thing that needs to be done. The
try-y Could be something I could play with down the road.

I know I should be finishing up the Pantera; and I am but I am thinking of
pulling my old Lumina Nascar out of storage. We have a drag strip not too
far from my house. I wold like to make it a test bed for engines. I want
to do a high hp build for my 73 Trans Am but set it up and run it in the
Nascar first. It might be a fun car for the open road races too.



> If you compare W vs. C
>
> 1-5-4-2-6-3-7-8
> 1-3-7-2-6-5-4-8
>
>
> And then swap top-to-bottom 1&2, 3&4, 5&7, 6&8 becomes 1&2, 5&7, 3&4, 6&8
> - so the tri-y's are the same regardless of the firing order.
>
> I don't have a bucket big enough to hold my "learning adventures".
>
> BTW, I had FPA Tri-Y's in my 428 FE Mustang.  I liked them a lot.  They
> sounded crisper than Hooker Super Comps - plus they didn't drag on speed
> bumps - which is why I made the switch.  My point is that I liked the
> design of Tri-Y's.
>
> On 9/4/12 12:53 PM, "gow2 at rc-tech.net" <gow2 at rc-tech.net> wrote:
>
>>Yea I think that may have worked better but I had already moved the other
>>direction. I am afraid there was only hind site in the first set. BTW I
>>have the firing order 15426378
>>
>>
>>
>>
>>
>>> 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
>>>>
>>>>_______________________________________________
>>>>
>>>>Detomaso Forum Managed by POCA
>>>>
>>>>Archive Search Engine Now Available at http://www.realbig.com/detomaso/
>>>>
>>>>DeTomaso mailing list
>>>>DeTomaso at list.realbig.com
>>>>http://list.realbig.com/mailman/listinfo/detomaso
>>>
>>>
>>>
>>
>
>
>