914/6 Stock Airbox

MikeH · Post by **MikeH** » Tue Jun 01, 2010 1:22 pm

I bought a 911T airbox to fit on my 914/6 conversion, but it's too tall. It fouls the bracing bar on the inside of the engine lid (plastic undertray has been removed), and the rear luggage compartment lid. It was 'interesting' trying to fit it.

I'm thinking of 'adjusting' it to fit, which runs the risk of turning it into scrap. So I'm unsure what to do at this point.

Has anyone got a standard one handy, that they could take some measurements and tell me:

The height of the 'cups' on top of the carbs that it mates to.
The height of the airbox itself
Does it take the same filter element as the 911s of that age, or is it completely different?

Any pics of the bottom of it, where it joins the carbs. and general side on shots would be great!

Any other relevant info would be appreciated - e.g. do the conversion engine mounts sit a bit higher than the originals?

Nick Moss · Post by **Nick Moss** » Tue Jun 01, 2010 1:29 pm

Mark, I have just checked on PET, and the 914/6 and 911T parts are all common.

MikeH · Post by **MikeH** » Tue Jun 01, 2010 1:45 pm

Hi Nick

Thanks for that. It might be that the engine is sitting a bit higher than the stock install then.

amallagh · Post by **amallagh** » Thu Jun 03, 2010 9:32 am

nick-moss wrote:Mark, I have just checked on PET, and the 914/6 and 911T parts are all common.

Hi Mark, this is my understanding as well - Same part as 911.
What is your measurement from the carb air box base plate (base of the trumpets) to the top of the engine lid ? I could then give you my measurement for comparison.
I had a 911 air box on mine before I rebuilt the engine and changed to some top hat filters from PMO.
I'm actually been looking for an original airbox, filter and carb buckets in good condition to put mine back to std so if you decide it won't fit your set up then I might be interested in what you've got.
Here are the PMO ones I use but other people supply them.
http://www.pmocarb.com/ad.htm
Regards
Andrew

MikeH · Post by **MikeH** » Thu Jun 03, 2010 10:25 am

I seem to have been collectively re-christened

but no matter.

I think there was about 5" from carb top deck to engine lid (the mesh, not the bracing bar. I'll be at the car (it's in a mate's garage in darkest Surrey) over the weekend, so I'll confirm then. The plastic shroud is removed from inside the engine lid.

Other things that could influence... the inlet manifold is about 1.5" high, from memory. The carbs are 40IDTP3C (so should be the same as the standard ones I'd think).

Maybe we can compare Engine mount to lid distance too? I'll get busy with the tape measure and camera, and get back to you. I'm hoping to keep it standard too, for noise as much as anything, but if I can't do it, you can have first dibs on the airbox setup.

Mike

964RSR · Post by **964RSR** » Sat Jun 05, 2010 7:23 am

Parts# are common 911 T and 914-6 but in fact they are different. 914-6 air is a little lower and don't touch the engine lid. It was made in steel for the around 500 first 914-6 and then in plastic (source Auto Atlanta). Here is my original 914-6 air box in plastic. I convert my 914-6 to GT specifications, so I don't need it ...

KS · Post by KS » Sat Jun 05, 2010 10:29 am

I can confirm that - I swapped the airbox on my 914/6 for some K&Ns with someone who had a 911T. It was only after the swap was done that I measured things and discovered the difference in height between the 911 and 914/6 parts.

davidppp · Post by **davidppp** » Sat Jun 05, 2010 1:45 pm

Hello 964 RSR.

the airbox in your pictures is incorrect for the -6..its fitted with the cold start system for an MFI 2.2 E engine..

I have a feeling the plastic boxes do interchange but cannot be 100%..

Kind regards
David

964RSR · Post by **964RSR** » Sat Jun 05, 2010 8:59 pm

" ... the airbox in your pictures is incorrect for the -6..its fitted with the cold start system for an MFI 2.2 E engine.."

David,
The cold system was fitted to 914-6 engine with carb. It was Electro-magnetic starting valve that you can see in 914 spare parts book, group 2, illustration 2/2, part #53, and group 9, illustration 9/1, part # 23. This elctro-magnetic caused many engine fire and if it is yet in service in your 914-6, I suggest you to make it out of order disconnecting wire.

In pictures, it is a real 914-6 airbox. A few monthes ago, I sent this pictures to Georges at Auto Atlanta.
Best

MikeH · Post by **MikeH** » Sun Jun 06, 2010 6:47 pm

Looks pretty similar - what's the height measurement of the correct airbox, from the bottom carb mounting 'buckets' to the top of the airbox?

Thanks

fourteener · Post by **fourteener** » Sun Jun 06, 2010 8:15 pm

FWIW, I had exactly the same problem with the steel airbox not allowing the engine lid to close. I fitted the K+N rain hats but I wish I'd had a stock airbox as I have a feeling the K+N's are quite a lot noisier.

KS · Post by KS » Sun Jun 06, 2010 8:59 pm

fourteener wrote:FWIW, I had exactly the same problem with the steel airbox not allowing the engine lid to close. I fitted the K+N rain hats but I wish I'd had a stock airbox as I have a feeling the K+N's are quite a lot noisier.

But that's why I fitted K&Ns – so I could hear the induction noise!

jwhillracer · Post by **jwhillracer** » Mon Jun 07, 2010 9:11 pm

I was going to try swapping the air filter from my 911 to the 914/6 and vice versa, just to prove a point, until I remembered that the 911 engine used to live in the middle of a certain Light Ivory 916, and therefore might not prove a lot.................

JW

amallagh · Post by **amallagh** » Mon Jun 07, 2010 11:05 pm

Same part number but different parts - Very curious
Does the 911T airbox fit in the 914-6 engine bay without the drip tray fitted to the engine lid.
i.e is the exctra height of the 911T airbox only a problem with the rain tray fitted ?

MikeH · Post by **MikeH** » Tue Jun 08, 2010 2:36 pm

It doesn't fit in mine without the drip tray. I will get there this week or weekend, and take those measurements. It's in a mate's garage, 40 miles from home, so I failed last weekend.