408 original air cleaner dimensions, please?

[Kevin H]

Originally Posted by dwomby

What diameter is your air cleaner, Kevin and also, how high is your intake manifold? Mine is about 3 3/4" / ~95mm.

David

Hi David,
Sorry about the late reply. My air cleaner is 17" diameter (underside it's a little wider at the top). The hole for the carby is 5".

My carb is an Edelbrock (1812) 800 CFM AVS Thunder (manual choke, which is not used).

However, my engine is a B block, so possibly a little wider in the valley than the small block 360.

As stated previously, the air cleaner is 90mm high, although the bottom is recessed, so the effective height off the top of the carb is 81mm. So 81mm higher than the flange around the top of the carb.

Unfortunately I can't say how the bonnet of the 411 compares with the 408.

Kevin

[dwomby]

Thanks, Kevin. It helps me zero in on what might fit although lots of mocking up and test fitting seems to be in my future. I'll keep this thread posted as ( or if ) I make progress.

David

[dwomby]

I have fitted the 14" round air cleaner. It has a deep (~1") recess in the underside. I put 3/8" thick expanded polystyrene blocks on the forward edge and the top nut to see if closing the bonnet left any indentations. I didn't see any, so I tried to film the inside of the bonnet when closed to see how much clearance there was. The video is here: https://youtu.be/oX2-ctVTgs4 The film of the front edge is quite clear but the film trying to see the top nut didn't work as I couldn't get enough light on the place. Still, I am quite pleased with the fit. Now I need to go a drive to see if it's any quieter.

If I need more, the next step is to buy a used snorkel/silenced air cleaner and, if necessary, cut out its bottom and fit the recessed part of this 14" onto it.

David

[AndrewA]

Looks better - hope it's quieter!