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Discussion Starter #1
I have recently finished installing a 1.7 8v twin carb in to a 1991 16v 33:confused:.

Sounds a bit backwards? The engine has been completely rebuilt with C & B Road Max cams along with a 11:1 CR.


I got the beast running yesterday using K & N bolt on filters and found the power good upon start but much lower when the engine compartment heated up. Obviously this is due to the lower psi of the hot air.

I'm thinking of either of the following:

*going back to the airbox using a K&N panel filter extending the intake to near the radiator fan using piping for cold air.

*Or using just the manifold from the airbox (sits on top of the carbs) and add piping to get cold air nearer the radiator fan.

I think the second option will sound better. I'm looking for the most consistent power once the engine is walm but I wouldn't mind some norty induction noise :eek:.
 

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I experimented on the dyno and road when I developed my engine (ser 3 Alfasud Ti)-I had an Italian car workshop-and found that the original air box ducted as it was with the tube to the front of the car (pickup by left inner headlight- as stock) could not be beaten for power output. I got a tiny barely measurable increase by using a highflow air filter Amsoil , K&N tried-both same result within the std airbox but in reality a new std air filter would have been ok. You need to either block off, or do as I did, use the pickup for warm air underneath the normal cold air intake as another cold air source.

Richard J
 

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Discussion Starter #4
Thanks for the feedback guys.

I think I will go with the standard airbox in the name of power. Shame I'm gonna loose the norty noise though :mad:.

Do you think it would be worth extending the air intake to nearer the radiator fan as the air should be even cooler down there?
 
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