 venturi and jetting recommendation |
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| the head |
 Nov 4 2009, 02:35 PM
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#1
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Newbie  Group: Members Posts: 16 Joined: 8-October 09 From: des moines ia Member No.: 10,906 Region Association: None  |
Hey all I have a 914 i just picked up with the crappy 2bbl carb kit on it, I am going to switch over to a 40 IDF setup the car is a 1.8 any recommendations on venturi and jetting sizes for it or where I can look up this type of informaiton?
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| IronHillRestorations |
Nov 4 2009, 07:00 PM
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#2
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I. I. R. C. Group: Members Posts: 6,717 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None 
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I'd suggest getting your carbs from a reputable supplier that knows type 4's, and is familiar with engines like yours.
Don't get sucked into the false premise that if you don't get big carbs and venturis, you'll be giving up power. You want an optimized carb/venturi/jet package, which ultimately depends on your engine specifics. |
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| zig-n-zag |
Nov 4 2009, 07:46 PM
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#3
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Member Group: Members Posts: 182 Joined: 18-May 06 From: Hawaii Member No.: 6,024 |
I'd use 28mm to 30mm venturis, 135 mains, 180 airs, 50 idles. If there is
a high performance cam in the 1.8, I'd go with 145 mains, 200 airs and 55 idle jets. Hope it helps. |
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| '73-914kid |
Nov 5 2009, 08:33 AM
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#4
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Senior Member Group: Members Posts: 1,473 Joined: 1-November 08 From: Vista, CA Member No.: 9,714 Region Association: Southern California  |
Even those jets seem rich. I'm running 47 idles, 115 mains, F11 ET with 28mm venturis, and it's really happy. This is a 2.0l, but unless you enjoy wasting gas, leaner is better.
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| the head |
Nov 5 2009, 08:34 AM
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#5
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Newbie Group: Members Posts: 16 Joined: 8-October 09 From: des moines ia Member No.: 10,906 Region Association: None |
depending on how much it smokes when I fire it up I may switch out to 2L barrels and slugs
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