Header is finished!

[George Harris]

Hi Mike:

Interesting project. Being new to Turbo, I'm interested in the 'science'
involved in exhaust manifolds. Is there any necessity to design the
length of the pipe to increase the efficiency of scavenging the
cylinders? Should the length of pipe between head and the collector be
some multiple of a magic number depending on the displacement and RPM at
the desired peak power?

Inquiring minds need to know :-)

Cheers
George

Michael Gough wrote:
> Finally....
> Damn what a great project!
> Header is done, now just have to tie up the loose ends and fire up the
> badass rebuilt MC motor.
> Pictures at
> http://www.newtsplace.com/~mdg3369/images/?mode=album&album=mikes_header&dis
> psize=640
>
> The later ones are high resolution and can be enlarged. The earlier ones
> can't.
> 1 1/4" weld-els (45° and 90°) mild steel, schedule 40 from McMaster-Carr as
> well as some straight pipe from Lowes, the collector cone is sch. 10
> Stainless 3"-2" pipe reducer. All flanges are 1/2" mild steel, base plate
> for collector is 3/16 steel. All tig welded. Everything was cut with my $40
> Stanley hack saw (beautiful tool, it really is) No, I didn't use an electric
> chop saw, and yes I am crazy! The "Y" for cylinders 2,3 was made by cutting
> the side out of two 45° bends and welding together. The "Y" for 1,4 was made
> by cutting the sides out of two 90° bends and welding.
> Cylinders 1 and 4 never flow at the same time, neither do 2 and 3, so there
> should be no restriction by pairing them together. FWIW, I think it would
> have been just as easy to make a 5-1, but I like how it came out.
> Still don't know where to put the wastegate, and it's gonna be a pretty big
> PITA to fit an exhaust pipe for the WG between the header and the K27 cold
> side.
> Also pictured is a comparison between the header and the POS factory
> manifold, what a pile of crap that thing is! Take a look at the pics and
> decide for yourself.
> If you have any questions feel free to ask, I'll take a few more pics when I
> take the manifold off the head. I'll probably do a write-up once I get my
> lazy butt around to making a website.
> Yes I'd sell it, and no, you can't afford it ;)
> Mike
> '88 QSW Turbo/EFI
>
>