901 airbox compatibility for various displacements

[DamonsCarrera]

I'm not sure where is the best place to ask this question, so I'm going to ask it here.

Background: my car has a 2.4L motor, although it originally came with a 2.0L motor oh so long ago. I would like to find an airbox that is correct for my car as it came from the factory.

My question is: Would an airbox from a 2.0L motor fit on a 2.4L motor, or is there some issue (like for instance that the engine's stroke is longer so the carburettors are spaced just a little further apart) that prevents me from fitting an earlier airbox on the 2.4L motor?

-Damon

[BURN-BROS]

Yes, a steel air box from 69-70.5 will fit. The engine dimensions did not change between most of the aircooled engines.

[DamonsCarrera]

Aaron, I'm actually thinking of a plastic airbox, since that's what came on 914s. Thanks for your response..

[911pcars]

While the air boxes might fit, the tubs that connect the intakes (carbs or FI) may not be entirely compatible.

Sherwood

[BURN-BROS]

The later 71T had a plastic air box too, The hold down clamps may be the only issue you may have to deal with.

I have a customer that has one on his car. I will try to get some details for you.

[DamonsCarrera]

I think I'd also have to get the parts that bolt to the carbs, then maybe the hold down clamps would match?

[DamonsCarrera]

Sherwood, the tubes that connect the intakes? What tubes?

[BURN-BROS]

I think he is talking about bases that bolt to the carbs, I have heard them called "boats" or "tubs"

If you can find the whole assembly then you are good to go.

The plastic carbureted air box I saw had cold start plumbing for the Zenith carburetors. I am not sure if the 914/6 ran a cold start with the Webers.

[DamonsCarrera]

Aaron thanks for your help. Webers don't have cold start. So they are two different airboxes and I need to make sure I get the airbox for Webers?

[BURN-BROS]

If Weber equipped cars did not run the cold start then yes. Since the 911's were Zenith equipped, then you would be trying to track down 914/6 Air box.

Now if you do not care about removing the cold start from the Air box then you have quite a bit easier time finding what you are looking for.

A lot of the cold start systems were removed long ago.

[GeorgeRud]

My 914-6 does have the small grommets for the cold start system, though they were never offered on the Weber carbureted 914-6 2.0. I understand that the top of the 914-6 air box was also not as tall as that found in the 911s, but I think they all will fit in a 911