 Dellorto DRLA tuning adventure continues |
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| era vulgaris |
 Sep 7 2015, 03:29 PM
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#1
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J is for Genius  Group: Members Posts: 982 Joined: 10-November 13 From: Raleigh, NC Member No.: 16,629 Region Association: South East States  |
DRLA 40's on a 2270
Main jet: 150 Venturi size: 34 Idle jet: 70 with jet doctors Air jet: 180 Emulsion tube size: 9164.2 Pump jet: 50 Timing set to 27 degrees BTDC Air bypass screws closed Mixture screws out about 2 3/4 turns Idle 1000 rpm AFR in the 12's Brand new phenolic intake manifold gaskets I posted a few months back because I was having trouble getting the idle down under 1200. That problem is solved. However I was only able to get the idle jets down to 70's from the 75's the PO had in there. I tried 60's but the best AFR I could get was in the 14's with the mix screws out 4 turns. Is this just how my setup is? It just wants 70 idles? I know everyone else was saying in my other thread that they're running 60 idles give or take a size with their mix screws further in, but I just can't get it to work. The engine runs fantastic with how I've got it now, revs really easily and smoothly, head and oil temps are great. Is this just the way it is for my car? I don't know what else to do. Here is the other thread, btw http://www.914world.com/bbs2/index.php?sho...amp;hl=dellorto |
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Replies(1 - 4)
| rhodyguy |
Sep 7 2015, 04:12 PM
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#2
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,080 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
it's only idling 50rpm above stock a FI car. no snapping out the exhaust or back thru the cabs? no off idle stumble? yes and yes, go drive it! see what the plugs tell you in 100 miles.
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| era vulgaris |
Sep 7 2015, 04:23 PM
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#3
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J is for Genius Group: Members Posts: 982 Joined: 10-November 13 From: Raleigh, NC Member No.: 16,629 Region Association: South East States |
Nope, no popping through the exhaust and no popping through the carbs. I drove about 25 miles today after I finished fiddling with it and it did great. No stumbling off idle or at any point in the rpm range. The thing is quick as shit! Seems even quicker now than it was before. #3 never got over 350, and hung around in the 320's for the most part.
I'll check the plugs next week and see what they look like. |
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| rhodyguy |
Sep 7 2015, 05:08 PM
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#4
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,080 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
a set of dialed in carbs are swell. i bet you'll get fair mpg if you can keep your foot out of it. i LOVE the carb noise at 5k.
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| era vulgaris |
Sep 8 2015, 09:15 AM
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#5
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J is for Genius Group: Members Posts: 982 Joined: 10-November 13 From: Raleigh, NC Member No.: 16,629 Region Association: South East States |
QUOTE(rhodyguy @ Sep 7 2015, 07:08 PM)  i LOVE the carb noise at 5k. I know! It's like an army of ogres all simultaneously gargling nails (IMG:style_emoticons/default/happy11.gif) |
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