 Weber 40IDA Mods for racing |
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| puffinator |
 Feb 23 2014, 12:20 PM
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#1
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Member  Group: Members Posts: 193 Joined: 6-August 13 From: Annapolis, MD Member No.: 16,218 Region Association: MidAtlantic Region  |
I bought a 914/6 which has a numbers matching engine but it has been modified with 2.2 cylinders with S cams and pistons and Weber 40IDAs. The engine was built by Rothsport Racing in OR in the early 2000s strictly for racing. I dropped the engine and trans to do some mods to the transmission at Dr. Evil's clinic a few weeks ago and while they were out I decided to do a refresh to the engine. In taking the carbs apart I found the float bowl bottoms to have some silicon or other pliable material spread around the corners of the bowl. See picture.
Any ideas as to why this was done and what advantage it provides? It also has 125 main jets but 170 air correction vice 130s and 180s which would have been stock for an S. Why?  |
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| gms |
Feb 23 2014, 12:51 PM
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#2
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Advanced Member Group: Members Posts: 2,695 Joined: 12-March 04 From: Chicagoland Member No.: 1,785 Region Association: Upper MidWest 
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This is to prevent fuel starvation to the engine on high g-force corners
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| Krieger |
Feb 23 2014, 01:23 PM
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#3
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Advanced Member Group: Members Posts: 4,724 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None
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If you look closely there is a plate that is glued near the bottom of each float bowel. This helps to force fuel to the main jets under hard cornering.
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| 02loftsmoor |
Feb 23 2014, 02:49 PM
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#4
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Senior Member Group: Members Posts: 577 Joined: 26-June 11 From: Ft. Worth TX Member No.: 13,243 Region Association: Southwest Region
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I learnd some thing today
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| Mark Henry |
Feb 23 2014, 04:33 PM
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#5
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
I thought you were supposed to use something that wasn't pliable, like JB Weld?
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| Mark Henry |
Feb 23 2014, 04:42 PM
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#6
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
QUOTE(02loftsmoor @ Feb 23 2014, 03:49 PM)  I learnd some thing today Since this will turn up in a search here's a couple of threads I've found on the subject. http://www.performanceoriented.com/technic...rformanceTuning http://youroil.net/carb_jet_selection.html |
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