Lagondaforum » Engine » Carburetion and Fuel » Air filters for 4-carburettor set-up

h14	Nov 07, 2010 5:38 pm
Subject: Air filters for 4-carburettor set-up Before anyone says anything; my dhc was originally fitted with 4 carbs. It was Alan Good's personal car, & his driver told me the 4 carb set-up was replaced by the standard 2 carb arrangement when he sold it. The rebuild is nearly finished, but Mel Cranmer, who is doing the work, just fits a gauze mesh over the intakes for his Le Mans V12s. I'd prefer something more substantial than that, and wonder if anyone knows what air filter/silencer arrangement was fitted to factory 4 carb cars, other than the Le Mans ones? I know the 2 carb arrangement is simply a silencer. Would also be interested to see how others have dealt with this. I suspect the intake noise from 4 large carburettors will be unacceptable without something in place! Laurence

h14

Nov 07, 2010 5:38 pm

Subject: Air filters for 4-carburettor set-up

Before anyone says anything; my dhc was originally fitted with 4 carbs. It was Alan Good's personal car, & his driver told me the 4 carb set-up was replaced by the standard 2 carb arrangement when he sold it.
The rebuild is nearly finished, but Mel Cranmer, who is doing the work, just fits a gauze mesh over the intakes for his Le Mans V12s. I'd prefer something more substantial than that, and wonder if anyone knows what air filter/silencer arrangement was fitted to factory 4 carb cars, other than the Le Mans ones? I know the 2 carb arrangement is simply a silencer. Would also be interested to see how others have dealt with this. I suspect the intake noise from 4 large carburettors will be unacceptable without something in place!
Laurence

Peter S30	Nov 08, 2010 9:18 am
Subject: Re: Air filters for 4-carburettor set-up Dear Laurence, I have only the 2 carb settup and the flat air filter housing is missing. Instead I found these nice brass suction trumpets in the car when I bought it and I am using them, so there is no air filter at all in my car. Suction noise is not a problem and the carburettors are well accessible this way. I know that others have cut a modern air filter and put it in the flat housing. Which certainly restricts air flow a bit. For me the decision was easy, and as long as you are not driving on dusty roads (Peking-Paris or similar) or 30000 miles per year I assume this should be ok. Earlier Lagondas did not have air filters either. I assume the 4-carb cars as the sports version (Le Mans cars, Rapides and a few others) did never have even the flat air filter/silencer housing. Peter
Attachments: carb.JPG (Filesize: 18.79 KB)

Peter S30

Nov 08, 2010 9:18 am

Subject: Re: Air filters for 4-carburettor set-up

Dear Laurence,
I have only the 2 carb settup and the flat air filter housing is missing. Instead I found these nice brass suction trumpets in the car when I bought it and I am using them, so there is no air filter at all in my car. Suction noise is not a problem and the carburettors are well accessible this way. I know that others have cut a modern air filter and put it in the flat housing. Which certainly restricts air flow a bit. For me the decision was easy, and as long as you are not driving on dusty roads (Peking-Paris or similar) or 30000 miles per year I assume this should be ok. Earlier Lagondas did not have air filters either. I assume the 4-carb cars as the sports version (Le Mans cars, Rapides and a few others) did never have even the flat air filter/silencer housing.
Peter

Attachments:
carb.JPG (Filesize: 18.79 KB)

h14	Nov 11, 2010 12:21 pm
Subject: Re: Air filters for 4-carburettor set-up Hi Peter, Mine had the original Burgess flat air silencer ..., it wasn't a filter, so perhaps I shouldn't worry too much. I might see if two of the Burgess air silencers could be fitted, perhaps with some modification. Would be interesting to hear if anyone knows if originally,4-carb non Le Mans V12s had any sort of silencer, filter, or even trumpets such as yours. Laurence

h14

Nov 11, 2010 12:21 pm

Subject: Re: Air filters for 4-carburettor set-up

Hi Peter,
Mine had the original Burgess flat air silencer ..., it wasn't a filter, so perhaps I shouldn't worry too much. I might see if two of the Burgess air silencers could be fitted, perhaps with some modification.
Would be interesting to hear if anyone knows if originally,4-carb non Le Mans V12s had any sort of silencer, filter, or even trumpets such as yours.
Laurence

yted	Dec 15, 2010 3:14 am
Subject: Re: Air filters for 4-carburettor set-up Lawrence, I can send you photos of the original flashbacks (they are neither a silencer nor filter) as factory-fitted to our 4 carb Rapide engine. However it will take me a day or two. Mark.
Attachments: 4-carb-yted1.JPG (Filesize: 68.97 KB) 4-carb-yted2.JPG (Filesize: 71.05 KB) 4-carb-yted3.JPG (Filesize: 36.71 KB) 4-carb-yted4.JPG (Filesize: 23.77 KB) 4-carb-yted5.JPG (Filesize: 52.23 KB)

yted

Dec 15, 2010 3:14 am

Subject: Re: Air filters for 4-carburettor set-up

Lawrence, I can send you photos of the original flashbacks (they are neither a silencer nor filter) as factory-fitted to our 4 carb Rapide engine. However it will take me a day or two.
Mark.

Attachments:
4-carb-yted1.JPG (Filesize: 68.97 KB)
4-carb-yted2.JPG (Filesize: 71.05 KB)
4-carb-yted3.JPG (Filesize: 36.71 KB)
4-carb-yted4.JPG (Filesize: 23.77 KB)
4-carb-yted5.JPG (Filesize: 52.23 KB)

h14	Dec 18, 2010 8:12 pm
Subject: Re: Air filters for 4-carburettor set-up Hi Mark, Thanks for response, just the info I was looking for! Will email you. Seasons Greetings Laurence

h14

Dec 18, 2010 8:12 pm

Subject: Re: Air filters for 4-carburettor set-up

Hi Mark,
Thanks for response, just the info I was looking for! Will email you.

Seasons Greetings

Laurence