 Changing empi venturis, Does it really matter? |
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| BK911 |
 Oct 23 2014, 12:20 PM
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#1
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Senior Member  Group: Members Posts: 672 Joined: 19-February 04 From: Rocky Top, TN Member No.: 1,674 Region Association: None  |
'72 1.7
Pulled the FI off several years ago and installed a set of EMPI 40s. Basically pulled them right out of the box and bolted them on. Car runs pretty well and plugs all look good. Over the weekend I was messing around and noticed the vents were 28mm. Just did the calc and it said I should have 30mm vents. So... should I? How much of a difference will it really make? With new vents goes new main and idle jets too? |
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| SirAndy |
Oct 23 2014, 12:23 PM
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#2
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Resident German Group: Admin Posts: 41,640 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(BK911 @ Oct 23 2014, 11:20 AM)  '72 1.7 Pulled the FI off several years ago and installed a set of EMPI 40s. Basically pulled them right out of the box and bolted them on. Car runs pretty well and plugs all look good. Over the weekend I was messing around and noticed the vents were 28mm. Just did the calc and it said I should have 30mm vents. So... should I? How much of a difference will it really make? With new vents goes new main and idle jets too? 28mm sounds about right for a 1.7L. You want the smaller venturis to get higher air speed. If your off idle throttle response is OK, don't mess with it. Larger venturis can create a "flat spot" where the main jets kick in. (IMG:style_emoticons/default/smile.gif) |
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Posts in this topic
BK911 Changing empi venturis Oct 23 2014, 12:20 PM
BK911 Thanks Andy. She runs out pretty good. For a 1.7... Oct 23 2014, 01:23 PM rhodyguy if you're pleased with the way it runs leave a... Oct 23 2014, 01:40 PM maf914 40mm IDF's with 28mm vents should be fine for ... Oct 23 2014, 02:31 PM
BK911 Thanks guys. Just making sure I wasn't leavin... Oct 23 2014, 04:13 PM Krieger
Thanks guys. Just making sure I wasn't leavi... Oct 23 2014, 05:14 PM Mike Bellis
Thanks guys. Just making sure I wasn't leavi... Oct 23 2014, 07:57 PM |
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