Thread: Thinking about a custom manifold

I dont believe so, the one above the customer requested the 80mm billet item.
I've posed a few other questions via email, just waiting on a response

i suspect some of the short runners is due to space concerns in some instances, i'm no expert.

Yah, I know, it also keeps the costs way down (don't have to purchase bends, or bend your own, to make things fit).

I believe the stock 20ve/16ve/20de tb is 60mm. I would go with the N1 runners and N1 tb which is 70-75mm or 80mm q45

Buy it and test it, you will be the only one that knows if that IM will make power.

Just do us a favor and test before and after, pref on the same dyno, ideally on the same day.

What i found was that for my motor and the N1 manifold I run out of air around 7k rpm (well velocity goes static) so i can very clearly see the benefit of a custom manifold. Depending on your motor you may see something completely different.

If you want to r&d you gotta pay

This is cool

If u do that to the VE manifold you will lose power ever where n/a. It would be too short, we test a O2 induction manifold that was made with only the lower part of the VE manifold to the flange. Looked alot like your pics and it didn't work for a N/A VE that short its good for turbo.

tbh i think you should get him to make new runners (get him to make them around 7.5 inches long with around a 1.5-2 degrees tapper) Then make a copy of the ve intake flange so these can be mass produced. I have 2 reasons for saying this:

1; if it does turn out to be a good manifold the yanks will have no excuse but to jump on board right now when their $$$ is so high

2; the standard runner reverse taper sucks

you could maybe even start up a poll or something and give the design specs (or even a prototype if cpc is on board) see how many are potentially interested, then talk to ctp and try and get a discount group buy thing happening or something. Would be great for the community i would think. I have no need for one as i am rwd, but i was thinking of getting the guy who is doing my latest rwd plenum to do a fwd one of the same specs, give a dyno proven difference and basically organise i group buy without taking any cut just to help out the community with a affordable intake plenum. But its a lot of work for me with no intentional benefit.

I think the 02 we test was about 6.5" but I'll have to double check with 5speed he might remember more of the details.

^^^ Agree with Chris on this one... Give it a go!

The O2 runners were 5" long. He basically use the lower half of the stock intake manifold and welded on the plenum and air horn.