I know the current turbo kits basically use a modified Y-Pipe to feed the turbo. But the factory exhaust manifolds are still used.

What I'm wondering is, would there be any benefit to replacing the factory exhaust manifolds/y-pipe with a tubular turbo manifold. Basically like full headers. Or do the factory manifolds flow enough so that there wouldn't be any gains. I know the headers from NZ didn't do anything.

I only ask to see if it's worthwhile. I'm getting a custom kit built for my car soon, and we have the capabilities of making a stainless steel manifold to feed the turbo. Just wondering if it's worth the added cost since it isn't cheap. On Hondas, I can't find any data on whether the tubular stainless manifolds show any gains over the standard cast ones, but on those cars, it's a very short manifold. On the Maxima, it would be significantly bigger, so there may be more gains.

 

I'd look into some JDM VQ30DET manifolds.

 

Good idea, I'll have to look into that.

 

on a honda tubular, cast, equal length are the widely available units.

most runners are short, however most companies usually all flow test their manifolds. equal length is by the best and has been dyno proven on 1.8l hondas to provide as much as 50whp at roughly 15psi.

i run a kooks equal length manifold which is fully stainless steel. the length of each runner is about 12 inches long on my integra.

in regards to manifolds, you get what you pay for. there is a ton of power to be found by designing better turbo exhaust manifolds, even for the vq motors. i mean tons. but r&d costs and consumer demand will never make this possible.

 

In the article about the Eibach turbo max, there was something in there about JWT designing a manifold which fit 4th and 5th gens. From other people I've talked to, they quit development on it.


That might be a start...

 

JWT wont give it to us though hahaa well atleast not to me hahahahahahaha

they basically said Maxima guys didnt make it worth it

I'm understanding that better than before haha