IDF Carb Tuning Guide

Keep it on topic, it will make it easier to find what you need.
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maytag
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Your car is a: 1976 124 spider
Location: Rocky Mountains....UTAH! (Not Colorado)

Re: IDF Carb Tuning Guide

Postby maytag » Sat Sep 08, 2012 8:43 pm

thanks for the offer! I'll take you up on it.
Which time zone you in?
I'm no Boy-Racer..... but if I can't take every on-ramp at TWICE the posted limit.... I'm a total failure!

sptcoupe
Posts: 987
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Your car is a: 1972 124 Sport Coupe

Re: IDF Carb Tuning Guide

Postby sptcoupe » Sun Sep 09, 2012 12:24 am

Central - Houston, Texas

sptcoupe
Posts: 987
Joined: Tue Mar 17, 2009 9:25 pm
Your car is a: 1972 124 Sport Coupe

Re: IDF Carb Tuning Guide

Postby sptcoupe » Tue Sep 11, 2012 5:26 pm

Dan - For some reason the email I sent bounced, but the jets you needed were mailed today and will be there by noon tomorrow. I also inlcuded a set of F9 emulsion tubes so you have more flexibility in dialing in the carbs.

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maytag
Posts: 1789
Joined: Mon Oct 19, 2009 9:22 pm
Your car is a: 1976 124 spider
Location: Rocky Mountains....UTAH! (Not Colorado)

Re: IDF Carb Tuning Guide

Postby maytag » Tue Sep 11, 2012 5:49 pm

weird.
I received two emails from you. did you send more?
I'm no Boy-Racer..... but if I can't take every on-ramp at TWICE the posted limit.... I'm a total failure!

sptcoupe
Posts: 987
Joined: Tue Mar 17, 2009 9:25 pm
Your car is a: 1972 124 Sport Coupe

Re: IDF Carb Tuning Guide

Postby sptcoupe » Tue Sep 11, 2012 7:07 pm

Just those two - and I received your response as well. Not sure why it gave me that notice.

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seabeelt
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Your car is a: Fiat Spider - 1971 BS1
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Re: IDF Carb Tuning Guide

Postby seabeelt » Mon Apr 15, 2013 11:11 am

Just looking through this post, what model Holly fuel pump are folks using? There are many "blue" models

Never mind - same performance specs - just newer model # :oops:
Michael and Deborah Williamson
1971 Spider -Tropie’ - w screaming IDFs
1971 Spider - Vesper -scrapped
1979 Spider - Seraphina - our son's car now sold
1972 Spider - Tortellini- our son's current

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RoyBatty
Posts: 852
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Your car is a: 1975 124 Spider - 1971 124 Sport Coupe
Location: Locust Grove, VA

Re: IDF Carb Tuning Guide, Dual IDF fuel economy?

Postby RoyBatty » Sat Mar 08, 2014 11:35 pm

Just a check on what to expect or how others are doing.
I have made several trips from the Central Valley over the Altamont into the SF Bay Area with my dual IDF's and seem to be averaging about 21 MPG. Keep in mind, I am not driving it for best economy, I hold the gears longer than I probably should and rev the piss out of it when the traffic allows. Lots of fun.
I am not at all complaining as this is the same fuel economy I was getting with the EMPI 32/36.
The plus side is the sweet sound and the extra power I gained.

sptcoupe
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Joined: Tue Mar 17, 2009 9:25 pm
Your car is a: 1972 124 Sport Coupe

Re: IDF Carb Tuning Guide

Postby sptcoupe » Fri Mar 14, 2014 11:36 pm

That sounds about right, but if you are careful and on a freeway you can eek out 25 or so. I get about 21 from my 2.0L with 44 IDFs on it. I can also get it down to 18 or so if I am having fun.

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RoyBatty
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Your car is a: 1975 124 Spider - 1971 124 Sport Coupe
Location: Locust Grove, VA

Re: IDF Carb Tuning Guide

Postby RoyBatty » Sun Mar 16, 2014 8:10 am

I was thinking the same, If I could only back off the throttle and cruise at a lower speed.........
But for some reason, it never happens.
I may have to do an economy run sometime to see just how much mileage I can get by driving like a stodgy old adult, instead of like a 50 yr old teenager.

sptcoupe
Posts: 987
Joined: Tue Mar 17, 2009 9:25 pm
Your car is a: 1972 124 Sport Coupe

Re: IDF Carb Tuning Guide

Postby sptcoupe » Mon Mar 17, 2014 10:27 pm

And so why on earth would you want to do that? You can get the mileage you want driving a modern appliance. When I get into one of the vintage FIATS I'm driving a CAR!

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RoyBatty
Posts: 852
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Your car is a: 1975 124 Spider - 1971 124 Sport Coupe
Location: Locust Grove, VA

Re: IDF Carb Tuning Guide

Postby RoyBatty » Sat Apr 05, 2014 12:12 pm

Hey sptcoupe thanks for bringing me back to my senses! :)
Ever notice that it seems to be more fun to do a slow run up thru the RPM band as you go thru the gears? Due to the sounds that the induction makes as you accelerate.
More fun to me anyway that trying to do a light to light race with rushed shifts. 8)

sptcoupe
Posts: 987
Joined: Tue Mar 17, 2009 9:25 pm
Your car is a: 1972 124 Sport Coupe

Re: IDF Carb Tuning Guide

Postby sptcoupe » Sun Apr 06, 2014 2:04 am

Glad to see you back on track! I thought we had lost you there for a moment. I can't think of a sound I like more than dual Webers on a Lampredi TC. For me, cruising at about 5500 - 6000 rpms is the sweetest music there is.

PininF
Posts: 369
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Your car is a: Fiat 124 Spider 1979
Location: Melbourne, Australia

Re: IDF Carb Tuning Guide

Postby PininF » Wed Dec 31, 2014 9:55 pm

Great reading exactly what I needed !
Need advice.
The car has been sitting for over 3 weeks without starting up…have just finished installing a new fuel filter by Filter King , waited a little while and turned over the key , the car started first go this has never happened before so was very happy can't say it was because of the new filter but hey first impressions are always the best !
Went on to install a new fuel pressure gauge ,again started first go so thought this is great…hoping to see the gauge idling to adjust fuel pressure but nothing at all…:( Any idea's ?
Cheers.
Image

sptcoupe
Posts: 987
Joined: Tue Mar 17, 2009 9:25 pm
Your car is a: 1972 124 Sport Coupe

Re: IDF Carb Tuning Guide

Postby sptcoupe » Tue Jan 27, 2015 12:53 pm

So the gauge isn't moving when at idle? Have you tried making an adjustment one way or the other (preferably toward higher pressure) to see what happens?

PininF
Posts: 369
Joined: Sat Nov 03, 2012 5:50 am
Your car is a: Fiat 124 Spider 1979
Location: Melbourne, Australia

Re: IDF Carb Tuning Guide

Postby PininF » Thu Jan 29, 2015 6:56 am

Yes tried that already , drove the car the other day without problems fuel flow was very responsive much better than before still the gauge doesn't work maybe it's just faulty will replace it over the weekend see what happens.

:-)))


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