Dual EMPI 44HPMX Tuning, What am I doing wrong? |
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Dual EMPI 44HPMX Tuning, What am I doing wrong? |
UkonCornelious |
Sep 4 2023, 02:27 PM
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#1
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Newbie Group: Members Posts: 16 Joined: 10-February 21 From: Richmond, VA Member No.: 25,192 Region Association: Middle East |
I have recently gotten everything needed to get my car back on the road after 15 years of sitting. I have a newly rebuilt, street cam 2056 with dual 44HPMX EMPIs and I am trying to get it running better.
The engine sounds pretty solid when operating between 3-5k, but below that (and at idle) it doesn't sound great. There are lots of exhaust pops and the engine seems to sputter a little while cruising at constant speed. I understand that you typically set the idle speed and then turn each idle screw in until the engine slows/ starts to die. Then you turn it out slowly until the engine runs smooth again. The problem is that the driver side carb doesn't seem to react at all when I screw either of the idle screws in all the way, and then backed out to 5 full rotations (which is the limit supposedly according to the video I watched). Do I have the wrong size idle jets? Are 44s just too big for this motor? Do I have an intake leak? Is the timing off somehow? (I originally set the timing with a light at break in) What do you think I should check or measure to get my carbs tuned properly? |
rfinegan |
Sep 4 2023, 04:54 PM
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#2
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Senior Member Group: Members Posts: 973 Joined: 8-February 13 From: NC Member No.: 15,499 Region Association: MidAtlantic Region |
The Venturi size may be too big@ the stock size of 36mm for a 2056 unless your are spinning it real high
Most are better suited with 30 to 32 mm vents and can tune easier Else get a jet pac kit from redline and keep tuning with a wide band o2 |
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