Thread: Tubular Manifold Build

Have you thought about a ram style manifold? That seems like it would simplify a lot of your problems.


I am definitely enjoying the DIY-ness in this thread,keep it up and don't give up

Ram horn or the old school ram manifold? Ram manifolds are nifty but are center positioned thus it wont clear AC line.

After having a nice discussion with BenFenner, I'm going to go ahead with a 4-2-1 design with 1-4 and 2-3 cylinder pairing. This way there is only one exhaust pulse going through the runner at a time.

I guess it's ram horn, just do it top mount instead of what traditional bottom mount. Then you would have more options on where you want the downpipe and the intake tube to go because they would all be away from the AC compressor. IDK maybe it's more trouble than it's worth on the other hand

On RWD it works well, but on FWD we have to have it have a right bias, otherwise the downpipe hits the Alternator and AC.




This is why Lovefab has it as a right bias:

I see I still look at those pics and see tons of possibilities to re-mold them up and in or to one side. If it was me I would tighten up the radius of the bends on those pipes, shorten the length of the collector (at least on #2,3 in the first pic and rotate the bottom bends in). Then not worry about having exact equal length and look at keeping the same amount of bends per runner. Bends tend to have more of a restriction in flow compared to length, a lot of really good manifold builders don't understand that and end up adding a good amount of tube length.

Yup I'm familiar with the bends making a bigger difference then equal length. I since I'm going for compact design, I don't have room to send the runners down then back up. As it stands aright now, I'm building a tubular replacement for the log manifold. Not an ultimate flow performer.

Actually that one pictured was ours, it was the first tubular non-EL Bruce made.

The hardest part for me was figuring out how to run the #4 runner. After that everything fell into place.

When I built mine I got a collector off of ebay. It was OBX and all I had to do was spend a few minutes cleaning up and gasket matching. The quality was pretty good considering price. Just an option to avoid the mess of having to make your own collector.

The picture posted was taken by Manny. Regardless who had it first it was a simple yet functional design.