Hp manifold differences, driver side

Posted By: kilroy

Hp manifold differences, driver side - 12/31/11 09:28 PM

I noticed that my '72 hp manifold looks bulkier and has an extra casting ridge as shown by my finger. Earlier manifold looked rounder and less bulky. Any difference aside from the ridge? Any reason for the change?

Attached picture 6994085-1231111424.jpg

Posted By: kilroy

Re: Hp manifold differences, driver side - 12/31/11 09:29 PM

and

Posted By: Jim_Lusk

Re: Hp manifold differences, driver side - 01/01/12 03:26 AM

The change was for the heat stove to the air cleaner.

Posted By: GO_Fish

Re: Hp manifold differences, driver side - 01/01/12 05:46 AM

the threaded hole below your finger was for a tin shroud to funnel heat into the air cleaner when cold.

Posted By: kilroy

Re: Hp manifold differences, driver side - 01/01/12 08:43 AM

Quote:

the threaded hole below your finger was for a tin shroud to funnel heat into the air cleaner when cold.

So the ridges are to hold the stove in place after the (aside from it being bolted onto the manifold)?

Anybody ever weigh the two for a difference?

Also no real performance difference from the earlier style is there?

Posted By: RapidRobert

Re: Hp manifold differences, driver side - 01/01/12 12:04 PM

Quote:

Also no real performance difference from the earlier style is there?

Andy made 550 horsepower from an alum (eddie iirc) headed 470 with those manifolds/3" mandrel headpipes. Overall visually they look like they'd flow the same or very near the same on the inside passages

Posted By: NachoRT74

Re: Hp manifold differences, driver side - 01/02/12 06:21 AM

Quote:

So the ridges are to hold the stove in place after the (aside from it being bolted onto the manifold)?

not really to HOLD, but just to make a craddle or bed. What really hold are the bolts