k1200 head: worth the hassle?
Turbo Mini Forums

equal length manifolds, i guess are better at maintaining pulse energy as the cross sectional area of each runner does not change through the manifold massivly, this coupled with the large radius in the turns of the runners is why they are used i guess. Obviously cost and the effort in producing them is thier pitfall.

Log manifolds are used because they are normally cast iron causing them to be tough and they are cheap to produce.

You could do a half way effort and do a tubular manifold that terminates in a singular collector.

I have already been looking at starting again with my manifold, nice as it is.

Here is some inspiration, I found on ebay

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Hey Matty.
any reason why? I mean yours looks terrific! However these pics are a bit more what I had in mind if I were to take this job on myself. Should you ever scrap yours however...lemme know?

1963 Cooper
1975 Pick Up

Arnoud. Ill design you a equal lengh manifold if you wish. All ill need is the space contraints. The flanges on the k head, the spacings and the diamater of the runners that go into the head.

I need to give back to the forum really, i cant do that financially, but i can give my time and im sure it would help a few people.

Great offer Sam, thanks:) I think that I want the impossible tho: ideally I'd like to leave the bulkhead alone (my pick up will be the recipient of all this great stuff)

1963 Cooper
1975 Pick Up

I cant see why that would be an issue. It wont be untill after next weekend ill have time to do it though. All ill need is a side on photo of how far the engine is away from the bulkhead with the engine on and some kind of scale. That with the flange dimensions and distances away from each other i should be alright.

Solotions not problems!

Edited by Sam on 29th May, 2011.

While equal length manifolds are ideal, they are not necessary IMO, since these engine produce more than enough power, the extra time and effort to squeeze in the extra tubing in an already compact engine bay out weighs the benefits.

OEMs don't concern themselves about it either in most cases, have a look.

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underbonnet heat would be reduced, but engine heat will be increased.

On 27th May, 2011 Sprocket said:
I have already been looking at starting again with my manifold, nice as it is.

Here is some inspiration, I found on ebay

Edited by minimole23 on 29th May, 2011.

You need to rotate the core so that the oil entry is still at the top

Ahh, I thought you'd probably have to do something like that.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

I subscribe to no mans rules

1963 Cooper
1975 Pick Up

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Squeaky! However I doubt it will be required as my solution will be a CAD attempt. Sadly CAD and soap suds dont mix.

I could make up a few k manifolds of the log type arrangement, if there is enough call for them?

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1/4mile in 13.2sec @ 111 terminal on 15psi