Making a log manifold...
 

Okay I'm making alog manifold for my zc and I'm going to make pretty much the whole thing. I just went and cut a peice of 1/2" steel and tomorrow im goign to pickup a new exhuast gasket so I can layout the pattern on it.

What size elbows am I going to want to get for this ? 1" or like 1.5" ?

Now please just try to bear with me on this while i explain.

I will port match the flange exactly to the ZC head that isn't a problem...but...after the flange where I attach the elbows, it is going to go from like a 1" hole to like a 1.5" elbow. Will this extra room directly after the flange make any difference?

thanks
nathan

Re:Making a log manifold...
 

Also, this is just going to be for either a t-25 or rhb5...depending on which one i buy. is this going to make any difference between a HF manifold?

nathan

Re:Making a log manifold...
 

Man, equal length log manis are so cheap now and can easily be snagged for under $100 bucks. No works involved, if youre giddy, do some portmatching.

Saves a lot of time, trouble. Maybe youre in it for the expierience I dunno, then I might think about doing it.

Good luck either way

Re:Making a log manifold...
 

Yeah i want to do it just to make it. ya know what i mean?

plus it is only going to be for a rhb5 or t-25...

the way I look at it is that I can spend like $10 on the elbows and pipe and make it myself, or I can spend $35 on a hf manifold...and im almost positive that this will have better flow than an hf manifold

nathan

Re:Making a log manifold...
 

No such thing as an equal length log manifold for 1 and for 2 it wouldn't be $100. A good equal length would run anywhere from $700-$1000. You need to buy 1.5" plumbing to make your manifold. Thats what I used.

Re:Making a log manifold...
 

Check this out: http://www.dotphoto.com/MemViewAlbum.asp?AID=1667944

and this:

http://www.sdsefi.com/techheader.htm

Re:Making a log manifold...
 

does anyone have the part numbers fro mcmasters.com for the elbows + t-joints?

of the correct items i should use?

nathan

Re:Making a log manifold...
 

I know jeff has posted them up for B series in a thread someplace.. not totally sure about D.

Here is something that you need to take into hard consideration before you begin.. do you have a spare head laying around that will be used when doing the welds all the way around the flange and elbows?

If not then u will warp the flange. I've had a junker B series head that has been laying out for a while that I was gonna use to create a manifold for the teg, but I'm dumping that ----.. promised the head to tekno9998 (phil) whenever he comes to see me.

Re:Making a log manifold...
 

yeah i have my old d16a6 head that is laying in my garage. some guy wanted to buy it so i took it out and cleaned that ---- up but never emailed me back....


so that'll work out nice.

i guess the key is lots of test fits...lol

nathan

Re:Making a log manifold...
 

how are u planning on doing this nathan? Just angle grinding the pieces and then MIGing it all together?