Intake Manifolds

[Guest]

Im looking at putting a new intake manifold on my N/A before a re-graph soon.

I know theres an intake from APS and theres an intake from NIZPRO and Ive just found out theres a new intake from CAPA on the market now, so which ones the ducks guts?

Im also after coments (constructive, not just sell it and buy a turbo) on how you think a new intake manifold on a N/A would go, Im thinking of using a open pod filter and get rid of the air box all together. This also removes about a metre of pipe work from the intake, the Nizpro boys belive it'll give anywhere between 10 to 15 kws. Which its not cheap but a gain is a gain.

I think a new intake will realy come into its own when a re-graph with a custom tune is added.

Ive already gone to far with my N/A to turn away now.

Come on guys tell me what'd ya re'con?

[macka'sxr6t]

I have'nt seen the new CAPA intake plenum.

If I had a N/A XR6 I would still try the Nizpro one. Should'nt be that hard to convert it to existing Air box with dual CAI intakes.

My only concern would be what effect the relocated throttle body would have on idleing and throttle response and smootheness (flat Spots) through the rev range. In a N/A engine.

If your intent on modding your cars intake you'll have to just suck it and see. As far as I'm awhere you would be the first to try.

It will be good to see how it works out.

Good luck with what ever you decide. Keep us informed on your decision and outcome.

macka

[Benny]

I'd be careful when changing the factory intake plenum on the n/a with something like the APS or Nizpro design. The n/a from factory has a quite clever variable intake design that changes the length of the intake runners by a butterfly valve. These butterflies are closed at low revs making a long intake path which improves bottom end torque and then are opened at higher revs shortening the intake length to make power. Changing to a big intake plenum designed for the turbo maybe a backward step.

Oh and if your thinking "but the turbo has the same manifold as the n/a" not true. The turbo manifold doesn't have the butteryfly valve because it's not needed with forced induction of course.

Hope this helps.

[macka'sxr6t]

Benny,

Good info I was'nt aware they were different setups

In your OP would this be the reason why people who try to supercharge their N/A they do not perform as well as expected.

macka

[Guest]

you would do better with throtle body change!

[Benny]

  macka said:

Benny,

Good info I was'nt aware they were different setups

In your OP would this be the reason why people who try to supercharge their N/A they do not perform as well as expected.

macka

<{POST_SNAPBACK}>

If you were going to supercharge the n/a engine then it would be in the best interest to remove the butterfly valve set up as it would be a restriction in the intake and would prove to be no use to a forced induction system. I believe using the looped intake design off the n/a on the turbo as done from factory would actually be causing quite alot of turbulance but has been done by Ford as a cost saving exercise. APS and Nizpro of course have realised this and introduced their new designs.

[Guest jteale]

Hey Greg Mate,

It sounds like you may be better off speaking to a Mate of mine about SuperCharging your N/A, he has fitted a S/C to his XR8 (even though now it is not currently on the car) ... now he has SCT Edit and will be once again SuperCharging his 8 (with Edit he has around 248rwkw with mods, when S/C again I am sure he is hoping for 300+rwkw) ... I am sure he could recommend some similar things to do to your XR6 N/A ... not sure how this would co-exist with your NOS but at least you could understand your options ... I am sure your car will be the most expensive N/A on the road

Cheers, Jason.