FI intake plenum heater

Keep it on topic, it will make it easier to find what you need.
Post Reply
Cozi

FI intake plenum heater

Post by Cozi »

The intake plenum heater on my 81 Spider has for the second time now begun leaking at a seam. I have had it re-soldered once and it has gone bad again. There are two generations of this item. I have the first generation brass model. The second generation appears to be a bit more evolved. It also mounts to a couple of studs on the plenum that do not exist on the earlier model so retro-fitting does not appear to be an option. What impact would running without this troublesome device have on the performance and/or well-being of the motor?
BEEK
Posts: 1833
Joined: Wed Mar 24, 2010 10:45 pm
Your car is a: 1975 Spider
Location: clermont fl

Re: FI intake plenum heater

Post by BEEK »

the purpose of the heater is to keep the butterfly from freezing, although im not sure from cold climates or from velocity freezing internally. someone may have an opinion on this. i have run many efi spiders without this heater, with no aparent problems. granted i was in georgia then. it does get cold in the winter, but no adverse problems
Automotive Service Technology Instructor (34 year Fiat mechanic)
75 spider
, 6 Lancia Scorpions, 2018 Abarth Spider, 500X wifes, 500L 3 82 Zagatos. 82 spider 34k original miles, 83 pininfarina, 8 fiat spider parts cars
son has 78 spider
Foster48x

Re: FI intake plenum heater

Post by Foster48x »

I ran my 80 FI without one all last winter with no issues but we only get a handful of freezing days down here in Texas.

Rick
Last edited by Foster48x on Sat Aug 21, 2010 12:56 pm, edited 2 times in total.
Cozi

Re: FI intake plenum heater

Post by Cozi »

Since Western Washington has relatively mild winters and 'Mona' is no longer a daily driver, the leaky heater is from here on out relieved of duty. Thanks fellas.
Post Reply