What do you guys think of this?

This is for the NA Supra, converts to a TT style, there are few modifications to fit.

Is this something you have had made, or something you are thinking of buying?

and also, why?

Bought! It is a bespoke item for the NA supra. Just needs a little modification to fit.

My little project over the winter.

Our standard intakes run over the top of the exhaust and engine and do not have the benefit of intercooling. Also the volume of the manifold is greater.

Hmm, it really should have a full radius bell mouth on each port runner, inside the plenum. It would be interesting to stick it on a flow bench to se what port velocity variations there are. It'll work, obviously, but how compromised it will be without bell mouths is hard to say without measuring it.

When it arrives, well after Xmas, Chris I could whip down and let you have a butchers if you wish!

I'd be interested to see it. I have a head on the flow bench at my head porter of choice, so if you wanted to spend MORE money he could have a look at it. Not sure how much he'd charge JUST to flow it, probably not a fortune, and it could show if there was any likelyhood of cylinders getting different air flows.

Well this guy has been making them for a while in the US and they seem to be going with no problems!

do not have the benefit of intercooling.

you arent going to put an intercooler on you NA are you?

Err, no that would be daft on an NA surely?

Would not get enough air pressure to feed the engine!

Err, no that would be daft on an NA surely?

 

Would not get enough air pressure to feed the engine!

Phew - im glad about that

from your post i quoted, i was a little worried

where will you run the air intake ducting then?

Battery is being relocated to inside/being replaced with a Gel type.

Hole being cut underneath battery tray and a short pipe being fed through, either to a filter inside the inner n/s wing with a heat shield.

Or a short pipe with filter then a cold air feed onto the filter from the outside, whichever works out better?!? Ala Pipercross stylee....

Bit of fun on a NA!

nice one mate, hope it works well

a short pipe with filter then a cold air feed onto the filter from the outside,

alternatively continue said piping back up through to the zorst side where lo and behold an overgrown snail resides ................. you know it makes sense m8ty:p

Yes Satsport I know exactly what you mean ;-)

Soon, my friend, soon.

Must keep the lady happy, not too many Supra purchases!

the bath mat looks sweet mate,, nice and pink.........

tt steve

Give me your address and we will have it shipped to you!

It does look a little rough around the edges, I'd go with the flow (test).

What gains are you hoping to achieve with this?

I think we should try it on mine first:p, you may also have to relocate the p/s reservoir I'd also like a look at it Dazsir

I think we should try it on mine first:p, you may also have to relocate the p/s reservoir I'd also like a look at it Dazsir

You are not to far from Hull to pop over and compare notes.

Did you know that the stock NA plenum is actually a quite trick twin-mode variable length system? The one you've bought...erm...isn't.

As far as I was aware, these types of intakes are only any good on an Na if you are going Na-T.

I believe the purpose of this type of intake on the Na-T is to allow for a shorter run of intercooling pipework, TT style, so you don't have to route the pipework from the intercooler outlet back across the car to the offside (plus the benefit of removing the pipework from the top of the engine where its hot!) and you can run a larger throttle body, which are both mods which benefit a turbo, but not necessarily an Na.

The Na Induction piping is tuned in length to create more torque (and there's a valve in there somewhere to shut off 1 of the runners where it splits into 2), so I believe if your gonna mount this on an Na your gonna see a marked loss in low end torque in trade off for a bit of top end power.(There was a thread on this a while ago, I'll see if I can find it)

I'm not saying your "doing it wrong", just interested in what your trying to achieve and the gains you hope to make.

Are you gonna Dyno it before and after the mod so the results can be quantified?

The Na Induction piping is tuned in length to create more torque (and there's a valve in there somewhere to shut off 1 of the runners where it splits into 2), so I believe if your gonna mount this on an Na your gonna see a marked loss in low end torque in trade off for a bit of top end power.(There was a thread on this a while ago, I'll see if I can find it)

Almost. It doesn't shut one runner off, but rather short-circuit the two halves of the plenum by joining them directly together rather than via the two secondary pipes immediately after the throttle valve.

But the net effect is the same as a twin length system. Two harmonics in the intake system: one for low end torque and one for top end power.

Almost. It doesn't shut one runner off, but rather short-circuit the two halves of the plenum by joining them directly together rather than via the two secondary pipes immediately after the throttle valve.

 

But the net effect is the same as a twin length system. Two harmonics in the intake system: one for low end torque and one for top end power.

Ahh! Yeah! That was it.

I'm still trying to find that other thread where this was discussed.