Custom air feed / ram air intake in a mk1 MR2

[ShadFx]

Hello chaps

Ive come up with an idea for my mk1 track car in the form of a dual air intake.. It currently has a KnN filter on it in the engine bay, but ive felt how hot that thing gets, and hot air = bad (or worse) air as far as my (limited!) knowledge goes. Now, this may be a bit mad - but my solution to the problem is to add another feed, not exactly sure where from yet.. But I can figure that out once ive had a really good look around at where I could route pipes etc.

My question to you all is - Would a second feed actually make a big difference? Or, would it in fact be detremental to performance in feeding the engine more air than it was desiged to take with the standard ecu mappings etc?

My idea for fixing it on was some kind of T join pipe, with the two feeds coming either side into the T, the air sensor just behind them and then the T joined onto the inlet manifold where the original KnN currently sits.

My other idea was to just have to one air intake but just route it away from the engine, but then again I thought that would be a bit boring and un-original

Any ideas would be very much appreciated - If I dont get much feedback (100 views so far on the MR2 forum but no replies ) i might just try it anyway and see what happens.

Shad

[Ry_B]

Pics of the engine?

[Ry_B]

And a cold air feed can only be a good thing, no such thing as too much cold air

[ShadFx]

Excuse the crap all over it - I only bought it 5 days ago and am in the process of cleaning! That was the first pic before cleaning for my project thread Took me an hour to clean up the air filter =\ Ill put another pic of a slightly different angle:



The standard filter / intake on these is in the boot would you believe! I mean, how stupid is that?!

[shakotan]

I thought the ducts on either rear quarter were supposed to divert air to the intake?

Or are they for twin radiators?

Edited by shakotan on Saturday 3rd July 13:31

[205jsy]

For the sw20s there were some kind of scoops that worked as a cold air feed



Having a look there seems to be one for the mk1 too



Not a fan on the looks personally.

[james_gt3rs]

205jsy said:

Not a fan on the looks personally.

No, they look absolutely awful!

[Ry_B]

My old MR2 (Sw20) had a pipe going into the vents on the side, seemed to pickup better than when the cone sat right on the end of the throttle body.

[Marf]

The scoop pictured on the SW20 above is designed to work with a closed air box.

The undertray on an SW20 MR2 is designed to funnel air up from under the car to be extracted by the low pressure zone created above the engine cover.

By putting one of those scoops on without a closed airbox all you are doing is stalling the air flow under the engine cover interfering with the way it was designed.

I have an ARC Airbox on my MR2 SW20, which I believe personally is the best aftermarket airbox for the car, as it boxes off the intake from the engine and is fed by the air ducted into the side vent in the same way the OEM airbox is fed.

This isn't as easy to achieve on the AW11 it doesn't have an intake on the passenger side of the car.

IMO your best bet would be to make or have made an airbox which is fed from wherever the stock airbox is fed from. Not sure where it is fed from on an AW11 though.

Edited by Marf on Saturday 3rd July 15:12

[ShadFx]

The standard airbox is in the boot - sod knows why. Stupid design IMO. There are two fins (one each side) which are supposed to increase airflow to the engine. I quite like the look of the mk1 - very retro Also I dont really care about looks so much - this is a track / occaisional fast road project car.

Just to clarify - im not looking to put any kind of scoops on the car, im looking to have an intake pipe coming from somewhere (probably the side of the car) with some kind of mushroom filter on the end of it - so its a direct feed to the manifold. All the scoops seem to do is increase the amount of air flowing round the bay.

Thanks for the input so far keep it coming!

[205jsy]

Could you not get a BMC CDA or similar and then have the cold air feed on the side of the car and then the "box" in the engine bay. Would it not be better then having a cone filter on the end of a pipe?

[MilleniumFalcon]

ShadFx said:

The standard filter / intake on these is in the boot would you believe! I mean, how stupid is that?!

IIRC The MK1a had the airbox in the engine bay, the Mk1b in the boot. Although theres all sorts of crossovers out there.

Been almost 11 years since i had my Mk1a - ahh, memories!

Edited by MilleniumFalcon on Saturday 3rd July 19:16

[jon-]

ShadFx said:

The standard airbox is in the boot - sod knows why. Stupid design IMO. There are two fins (one each side) which are supposed to increase airflow to the engine. I quite like the look of the mk1 - very retro Also I dont really care about looks so much - this is a track / occaisional fast road project car.

Just to clarify - im not looking to put any kind of scoops on the car, im looking to have an intake pipe coming from somewhere (probably the side of the car) with some kind of mushroom filter on the end of it - so its a direct feed to the manifold. All the scoops seem to do is increase the amount of air flowing round the bay.

Thanks for the input so far keep it coming!

On my MK2 i run a bit of aircon ducting from a side vent to an apexi airfilter.

Forget any sort of "ram air" affect, you won't make any different to manifold pressure without a turbo / travelling speeds faster than a MK1 can go. Cold air is good though.