The $40 AC Compatible Log Manifold
 

Seen a lot of people making their own log mani's on here so I figured I'd give it shot. This will be a minor upgrade from the HF manifold I was going to use, so I didn't want to spend a whole lot of money on it.

Brace yourselves...

Home Depot plumbing elbows and tees. ~$7
Head Flange from Weir Technologies ~$20
T25 Flange from Weir ~$10

Flanges are in the mail, will finish up when they arrive.

Conception:
http://terpconnect.umd.edu/~cmgreen/Mani/1.JPG
The goal; A lot of grinding required:
http://terpconnect.umd.edu/~cmgreen/Mani/2.JPG
After welding; Flux Core Chinese Mig FTMFW!:
http://terpconnect.umd.edu/~cmgreen/Mani/3.JPG
Gnarliest weld:
http://terpconnect.umd.edu/~cmgreen/Mani/4.JPG
For those of you who don't know, behold the glory that is sandblasting. Takes things that look like crap and makes them awesome. I'm also convinced sandblasting can fix ANYthing... but I digress:
http://terpconnect.umd.edu/~cmgreen/Mani/5.JPG
Spatter up!
http://terpconnect.umd.edu/~cmgreen/Mani/6.JPG
An inside view:
http://terpconnect.umd.edu/~cmgreen/Mani/7.JPG

Thoughts, suggestions, praises, and critiques welcome!

Re: The $40 AC Compatible Log Manifold
 

the threads add turbulance, helping the exhaust pulses merge into one as they enter the turbo

Re: The $40 AC Compatible Log Manifold
 

True HMT madness!! :y

Re: The $40 AC Compatible Log Manifold
 

yes, china cast ftw.

Re: The $40 AC Compatible Log Manifold
 

I like, but if you dont have the head flange how do you know your spacing between the runners is correct?

Re: The $40 AC Compatible Log Manifold
 

he apprently has the motor he's putting the log onto

Re: The $40 AC Compatible Log Manifold
 

i like that.

spacing LOOKS right ha post pics when its done

Re: The $40 AC Compatible Log Manifold
 

I mocked it all up to the hf manifold I have. Had to grind down the threads so that the elbows would screw far enough in.

Haha that sounds like a good theory. I did grind off the exposed threads to minimize any sharp corners where heat would accumulate, but there's still plenty of turbulence to go around. Also with the Street Elbows the diameter necks down where they join the Tees, and then immediately opens up to the Tee inside diameter, so that will hopefully somewhat reflect pulses from other cylinders aimed at entering the 1 and 4 runners backwards.

The real beauty of this is that everything is screwed together, even the tees have a 1/2" length of a close nipple in between them. Even if my welds were total ----, the thing would still hold itself together and decently maintain pressure.

Re: The $40 AC Compatible Log Manifold
 

i would change your user name if i were u!!

Re: The $40 AC Compatible Log Manifold
 

i like it. wish i woulda gone this route. my life would be much better right now.

Re: The $40 AC Compatible Log Manifold
 

i have always wanted to make one of those for some reason, but i got a really nice cast one. maybe i will get to make one for someone else one day

Re: The $40 AC Compatible Log Manifold
 

this thread makes me all warm inside.

pipe fittings ftw.

Re: The $40 AC Compatible Log Manifold
 

True hmt, Ilike :y

Re: The $40 AC Compatible Log Manifold
 

Im interested ot see whta happens when you go to put the flanges on. I see alot of grinding and fugly wlding. >:D

Re: The $40 AC Compatible Log Manifold
 

haha thats crazy looking. Its shame they don't sell weld-elbows at lowes/home depot

Re: The $40 AC Compatible Log Manifold
 

can you oxy/accet cut cast metal?

i had to buy a hole saw for my SS 304 log mani

Re: The $40 AC Compatible Log Manifold
 

makes a mess, but you can do it

Re: The $40 AC Compatible Log Manifold
 

i cut holes with my ------ mig welder

Re: The $40 AC Compatible Log Manifold
 

awsome!!!

Re: The $40 AC Compatible Log Manifold
 

How do you do that?
Do you just crank the amperage up or what?

Re: The $40 AC Compatible Log Manifold
 

Yes

Re: The $40 AC Compatible Log Manifold
 

^^^ lol

are the 90s galvanized??

Re: The $40 AC Compatible Log Manifold
 

nah no galvanized. In the plumbing industry they call it "black steel" but I'm pretty sure its just a mild steel.
Got the flanges welded on yesterday, will post up pics later today. Turned out pretty good.

Re: The $40 AC Compatible Log Manifold
 

Haha back when I was younger my parents bought an rv that had serious driveshaft issues, i.e. the u joints etc. So when my dad finally took the thing in to have the joints and stuff fixed (after a road trip that included replacing u- joints in a walmart parking lot in alabama)...all the guys started laughing hysterically. Apparently the damn driveshaft was made from black steel piping, with ends welded on. No wonder it wouldn't balance.

Re: The $40 AC Compatible Log Manifold
 

Im in for the updates........

Re: The $40 AC Compatible Log Manifold
 

Been a busy weekend! Got the manifold made, then my buddies and I decided we should try and get the turbo spinning this weekend too. So we made a down pipe, ran the oil feed and return lines, and fired it up. I'll let the pictures do the talking.

http://terpconnect.umd.edu/~cmgreen/Mani/8.JPG

http://terpconnect.umd.edu/~cmgreen/Mani/9.JPG

http://terpconnect.umd.edu/~cmgreen/Mani/10.JPG

http://terpconnect.umd.edu/~cmgreen/Mani/11.JPG

http://terpconnect.umd.edu/~cmgreen/Mani/12.JPG

http://terpconnect.umd.edu/~cmgreen/Mani/13.JPG

http://terpconnect.umd.edu/~cmgreen/Mani/14.JPG

http://terpconnect.umd.edu/~cmgreen/Mani/15.JPG

http://terpconnect.umd.edu/~cmgreen/Mani/16.JPG

http://terpconnect.umd.edu/~cmgreen/Mani/17.JPG

http://terpconnect.umd.edu/~cmgreen/Mani/18.JPG

http://terpconnect.umd.edu/~cmgreen/Mani/19.JPG

http://terpconnect.umd.edu/~cmgreen/Mani/20.JPG

http://terpconnect.umd.edu/~cmgreen/Mani/21.JPG

http://terpconnect.umd.edu/~cmgreen/Mani/22.JPG


The downpipe is touching the clutch bleed screw; will this cause any problems?

There was a LOT of smoke when we first started it up. Drove around on it a bit and the manifold started turning blue as seen in the last pics, but no worries. Had to make a copper gasket for the downpipe to seal it to the turbo better. It works pretty well, but could stand to be widened a bit more. Have the wastegate held open so the turbo won't spool too fast while driving. I'll just try to keep it under 4k rpms and part throttle. Downpipe is leaky as anything where it meets the cat, but I didn't spend a lot of time on that since I'll probably want to "upgrade" the cat. Any suggestions for a temporary fix?

Re: The $40 AC Compatible Log Manifold
 

Just grab a hammer and give the down pipe a little smack untill it clears your bleader screw on your clutch master cyl.

Re: The $40 AC Compatible Log Manifold
 

I didn't really get any other good pics while I was cutting for the flange.
I made 4 cuts with the angle grinder. Two parallel to the manifold and one perpendicular on the left and one perpendicular on the right.

The two parallel cuts were spaced according to the inside opening of the flange.

The left and right cuts were spaced to the outer dimensions of the flange.

Then I ground the parallel cuts to a flat-ish surface.

Set the flange in between the left and right cuts and snug it against the parallel cuts and weld in place. Had a good weld area all the way around.
One spot of trouble was that some of the bolt holes on the flange slightly connected through to the inside of the manifold. I just welded over the backs of the offending holes to seal them up. That's the second bead on the left side of the flange that you can see.

Re: The $40 AC Compatible Log Manifold
 

the smoke is probably nothing. a lot of times its from all of the body oils on the exhaust parts. it will burn off. if it never goes away, then start looking into it

Re: The $40 AC Compatible Log Manifold
 

hmt for sure

good work with that flange. i was thinking of doing something like that with my mani, but the extra height gained when recessing the flange into the log cost me some clearance i needed


those straight copper oil lines?

Re: The $40 AC Compatible Log Manifold
 

That is badass.

Re: The $40 AC Compatible Log Manifold
 

This thread is full of win. Looks great!! I love the copper oil line!

Re: The $40 AC Compatible Log Manifold
 

Great job.
I might look into something like this when it's time to put together a kit for myself.
Keep this thread updated on how it's holding up ovet time.

Re: The $40 AC Compatible Log Manifold
 

dude that is BAD ASS!!!

this is TRUE HMT style nice work man

Re: The $40 AC Compatible Log Manifold
 

That downpipe is sex also. I built one of these a long time ago. One of the best manifolds I have made so far ;)

Re: The $40 AC Compatible Log Manifold
 

gj

Re: The $40 AC Compatible Log Manifold
 

FRONT PAGE WORTHY. Classic HMT... at its finest. O0

Re: The $40 AC Compatible Log Manifold
 

makes a tear come to my eye.

reminds me of why i love this site so much.

----------ing gangster HMT work son.

Re: The $40 AC Compatible Log Manifold
 

good job on the mani,looks tits :6

Re: The $40 AC Compatible Log Manifold
 

Good job.

I made one out of pipe fittings. They're actually pretty close to the right space apart.