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Old 08-04-2017   #1
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exhaust emissions control

I just got a '77 spider and I'm wondering if anyone has ever removed all the hardware and hoses that comprise the exhaust emission control, and then plugged the holes? If so, what happened?
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Old 10-04-2017   #2
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Re: exhaust emissions control

Lots of people have done this.
Seems to be standard practice in the U.K. and elsewhere where people have imported 124 Spiders from the U.S. (the 124 Spider was never officially imported/sold into the U.K. by Fiat).

Afaik, the car runs fine without all the emission gear. The 124 Spiders sold in the U.S. always had less power than the European versions. But there may be more to it than just the emission equipment, maybe different compression ratio? different cams? different carb?


Al.
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Last edited by F123C; 10-04-2017 at 01:17.
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Old 10-04-2017   #3
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Re: exhaust emissions control

Quote Originally Posted by F123C View Post
Lots of people have done this.
Seems to be standard practice in the U.K. and elsewhere where people have imported 124 Spiders from the U.S. (the 124 Spider was never officially imported/sold into the U.K. by Fiat).

Afaik, the car runs fine without all the emission gear. The 124 Spiders sold in the U.S. always had less power than the European versions. But there may be more to it than just the emission equipment, maybe different compression ratio? different cams? different carb?


Al.
My '76 owner's manual says the compression ratio of my 132 A1 040.6 is 8:1. Wiki says the 132 A1 040 engine has 8.9:1. Do you, or anyone, know where to find factory info on all the engine configurations?
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Old 10-04-2017   #4
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Re: exhaust emissions control

Quote Originally Posted by Charlie124 View Post
My '76 owner's manual says the compression ratio of my 132 A1 040.6 is 8:1. Wiki says the 132 A1 040 engine has 8.9:1. Do you, or anyone, know where to find factory info on all the engine configurations?
According to the Fiat Spider workshop manual, it's 8:1
.
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Old 11-04-2017   #5
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Re: exhaust emissions control

Quote Originally Posted by Davren View Post
According to the Fiat Spider workshop manual, it's 8:1
.
European spec 132 series engines (1592 & 1756cc) had a 9.8:1 C.R.
and the valve timing figures were I/O 26*btdc I/C 66*abdc
E/O 66*bbdc E/C 26*atdc
Valve lift was 0.3824 inches (c. 9.7mm)
Valve sizes were Inlet: 1.629 ins (c.41.4mm)
Exhaust: 1.417 ins (c. 36.0mm).
Power outputs were 104 hp for the 1600 and 114 hp for the 1800 engines.

The above details are from the Haynes Owner's Workshop Manual for the Fiat 124 Sport and Spider. I suspect these specs are accurate for the Sport (Coupe) model but might not be for the Spider model sold in Europe. I don't have a Fiat 124 Spider manual so Davren's figures could very well be more trustworthy.
Imho, Wiki is good but not infallible - often one figure/spec will be given for a particular model but there may have been changes during that models lifetime.

Contemporary magazine Road Tests put the figures at 108 bhp for the 1600 engine and 118 bhp for the 1800. I'm never sure who to believe... Even dynamometer tests can throw up different figures depending on variables such as barometric pressure, ambient temperature etc.

Al.
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Last edited by F123C; 11-04-2017 at 01:42.
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