Warm-up Snorkel

[jaudette3]

My '73 does not have the warm-up "snorkel" (dunno what the real name is) installed, but I do have it and the hoses. What are the pluses and minuses of having it installed? I don't drive the car very much in cold weather.

Thanks,
John

[sithot]

My '73 does not have the warm-up "snorkel" (dunno what the real name is) installed, but I do have it and the hoses. What are the pluses and minuses of having it installed? I don't drive the car very much in cold weather.

Thanks,
John

John:

Roger Grago can back me up on this but at some point Porsche issued a bulletin suggesting these be removed. There was some concern regarding ingestion of dirt etc.. Roger admitted that he remembered the technical bulletin but couldn't say when he saw it when this topic came up in the past.

Chuck Stoddard knew this and when SSI was building their exchangers he was contacted as a consultant for input which he gave telling them to forget building a 72-73 MFI exchanger.
I actually discussed this with the owner of SSI several years ago and he relayed the Chuck Stoddard story to me.
The left side heat exchanger only needs the heavy "steam hose" to feed the pump to change the rack position from enrichment to normal mixture once temperature is reached. The "little" secondary heat exchanger is what feeds the snorkel assembly. My '73-S had this capped off on the original sheetmetal and whoever did it was a fine metal beater/shaper. The snorkel was removed although it came with the car.

BTW, if you want to find a hard part try locating a left side piece of sheetmetal for a '72-'73 car. When I pulled the engine on mine I replaced the original now "capped" one for a "pre" pre-heat car as all the sheetmetal was powdercoated getting powdercoated and I wanted to clean up that area. I think I still have the '72-'73 only piece.

The snorkel thing was to get more hot air into the engine to warm it up faster and probably reduce emisssions. Other than that it's in the way and does nothing for air flow.

Best regards,

Tom

[RTincher]

Tom, thanks for the thorough reply on the '72-73 engines. Any insight on the earlier '70-71 intake snout, which is longer and narrower than the 4-5 inch residual snout on my '72-73 now that I've removed the warm-up intake assembly? I'm putting a 2.7 in a 1971 and for appearances would prefer the original '71 intake snout, but not if it's much more restrictive.

Thanks

[sithot]

Tom, thanks for the thorough reply on the '72-73 engines. Any insight on the earlier '70-71 intake snout, which is longer and narrower than the 4-5 inch residual snout on my '72-73 now that I've removed the warm-up intake assembly? I'm putting a 2.7 in a 1971 and for appearances would prefer the original '71 intake snout, but not if it's much more restrictive.

Thanks

It looks to be more restrictive based on its design.
I'd go with the '72-'73 setup for "go" and the other for "show".

Best,

Tom