 Weber IDF Jetting |
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| FastFroggy |
 Jun 30 2017, 12:20 PM
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#1
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Member  Group: Members Posts: 72 Joined: 27-November 15 From: South East MI Member No.: 19,415 Region Association: Upper MidWest  |
I am starting to play around with tuning and plan to start getting some small increments in jetting. Just to see if I can improve drivability for now. I have twin 44s
Simple question for now: I need 4 turns of idle mixture to now stumble off the line. Should I consider jetting richer? thanks |
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| ChrisFoley |
Aug 15 2017, 07:17 AM
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#2
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I am Tangerine Racing Group: Members Posts: 7,990 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None 
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Depending on your specific engine build you may even want to increase the venturis to 38mm. I've used 37.5mm vents in my 40 IDFs but that's nearly a straight tube in a 40mm carb body.
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Posts in this topic
FastFroggy Weber IDF Jetting Jun 30 2017, 12:20 PM
Perry Kiehl Idle speed screws or mixture screws? There's ... Jun 30 2017, 05:19 PM FastFroggy Thanks, yep idle mixture screws. Jun 30 2017, 05:59 PM
stownsen914 2 full turns on the idle mixture screws sounds lik... Jul 1 2017, 06:10 AM FastFroggy I am initially working for initial throttle tip in... Jul 1 2017, 04:48 PM McMark You should post the entirety of your setup. Engin... Jul 4 2017, 08:21 PM john77 4 sounds like a lot just to get it stumbling off t... Jul 7 2017, 04:53 PM FastFroggy Thanks for all your input. Sorry, got delayed by a... Aug 8 2017, 07:30 PM ThePaintedMan 36 venturis in 44s for a 1.7 liter is HUGE. I... Aug 9 2017, 06:30 AM rhodyguy I think george nailed it. The venturies are VERY l... Aug 9 2017, 08:47 AM Jetsetsurfshop I think I know something here...lets see if I can ... Aug 9 2017, 02:26 PM FastFroggy I should have been clearer that engine block is a ... Aug 9 2017, 06:17 PM McMark You're going to have a really hard time withou... Aug 12 2017, 08:13 AM ThePaintedMan :worship: Boom. Mic drop. Mark knows his stuff. It... Aug 12 2017, 04:44 PM FastFroggy Look I bought the car with this set up and I am tr... Aug 13 2017, 09:17 PM stugray
[b]If it continues I'm out.
I [b]was going... Aug 15 2017, 10:04 AM McMark I didn't intent for you to feel beat on. I... Aug 14 2017, 07:26 AM FastFroggy Thank you for your note.
Again, I really apprecia... Aug 14 2017, 10:47 AM rhodyguy Forget that 6.8k rpm number for your calculations.... Aug 14 2017, 11:19 AM michael7810 The redline on my 4 cyl car is 5.6K. Can you reall... Aug 14 2017, 01:46 PM Jetsetsurfshop
The redline on my 4 cyl car is 5.6K. Can you real... Aug 14 2017, 03:46 PM euro911 Quit brow-beating the new guys, Mark :poke:
:l... Aug 14 2017, 04:31 PM FastFroggy :blink:
I understand the consensus ( for overall ... Aug 14 2017, 05:13 PM Racer Chris Keep the 44s. Don't expect good performance be... Aug 15 2017, 07:05 AM |
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