plenum for a 38ADL carb???

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toplessexpat
Posts: 1183
Joined: Fri Aug 31, 2012 2:29 am
Your car is a: 1976 Spider 1800
Location: Houston, TX

Re: plenum for a 38ADL carb???

Post by toplessexpat »

That's exactly what I've got
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Many classic Fiats - it's a disease!
www.mirafiori.com
coise

Re: plenum for a 38ADL carb???

Post by coise »

Thanks.
When I tried my 38ADL last summer it did not perform as expected.
The idle was not smooth, and acceleration up to 4000rpm wasn´t neither, also when I was holding a steady 3000rpm the engine was doing a back and forth type of noise like it could not keep a steady RPM.
That is why I bought a gasket kit with all the membranes and that´s also why I will try to change my idle jet from 50 to (55 or 60). Then I will try to change the main jets and air corrector to see what happens.

I´m not sure I´m very clear in my explanation but that´s the only way I can explain it.

Toplessexpat
What do you think? Is it a good plan?
User avatar
toplessexpat
Posts: 1183
Joined: Fri Aug 31, 2012 2:29 am
Your car is a: 1976 Spider 1800
Location: Houston, TX

Re: plenum for a 38ADL carb???

Post by toplessexpat »

So - I'm running much more performant cams than stock (42/82), that will have an impact.

A
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Many classic Fiats - it's a disease!
www.mirafiori.com
coise

Re: plenum for a 38ADL carb???

Post by coise »

I´m running 40/80 cams. I will try to tweak the carb this summer.
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