Setting up IDA's for a stock /6, jets, and so forth |
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Setting up IDA's for a stock /6, jets, and so forth |
krk |
Feb 7 2004, 03:55 PM
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#1
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Senior Member Group: Members Posts: 997 Joined: 27-December 02 From: San Jose Member No.: 22 |
Folks,
I picked up a set of IDA's in good condition that were set up for a 2.8 (maybe an RSR?) -- anyway, the IDA"s on my /6 have throttle shaft issues, so I figured I'd just swap some parts back 'n forth to get the correct setup for my stock 2.0L /6. Turns out my original IDA's weren't exactly stock either. There are several parameters here. Idle jets are currently at 55 on both carbs. (stock is 45) I'll be using 55 initially. Mains are 125 on my current set, 155 on the new ones, stock is 105. I'll be using the 125's. Emulsion tube on mine are F26's (same as 911L), and on the new ones they are F3's (911S). The originals used F1's. I've no clue which one I'll use -- if I'm lazy, I'll leave the F3's in there. Air correctors are 180 on both IDA's. Original's used 170s. I'll use 180s. Pump Jet is 50 everywhere. In the picture you will see two different auxillary venturis -- the shorts ones are stock /6, and the tall ones I've not seen before. No clue what to use. Lastly, and I've not got this far as I have to cut wires, but from an eyeball estimate, the actual venturis on the originals were quite a bit more restricted. I'll pop both of them out shortly to see what they are --- i'll use whatever is closest to the manual I guess. Comments welcomed. kim. This post has been edited by Gint: Feb 8 2004, 10:47 AM Attached image(s) |
campbellcj |
Feb 7 2004, 09:12 PM
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#2
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I can't Re Member Group: Members Posts: 4,548 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California |
Well I think I finally got my 40's sorted out today ! (IMG:style_emoticons/default/boldblue.gif)
Richard @ PMO was a great help and supplied some parts including his sweet AN-6 solid fuel bars with 2 day turnaround. My engine is a factory -6 built to 2.2S specs, except that the heads are a "mystery" and may well be stock 9146/2.0T. The main problem was just the setup of the carbs. I wish I would have checked that out sooner -- knew it was running very rich but figured the jetting was way off and I didn't want to deal with it at that point esp since rich = "safe". Well, the PO had the mixture screws about 6 turns open (baseline is 2 turns)! And, the idle jets were 55's but I found 1 50 and 1 45! (They may have been reamed out, I dunno). Air idles were too far open also, I think. Venturis were a bit too large for this motor too; they were 34's at least. Also I tweaked the linkage rods to finally eliminate a tiny bit of preload that was causing the idle to wander; sometimes it would come back down nicely, sometimes not. Lastly Richard suggested going to a click or two hotter plugs, so I went to a BP7ES (I had 8's which are very cold.) I have a set of BP6ES's here too but probably will not need them. BTW www.sparkplugs.com is pretty cool -- huge selection and very prompt delivery. Anyways, this is what I have in 'em now and the car is running way smoother and with noticably more pull and sharper throttle response. 32 venturis/chokes 4.5 aux venturis 180 air correction F26 emulsion 55 idles 130 mains This is the 2.0S setup except for the F26 vs F3 emulsion tubes. Richard said I should try those if the car wasn't happy with the F26's but I am not seeing any reason to change at the moment and am not sure what the actual diff would be? |
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