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09-07-2022, 12:25 AM | #26 | |
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Join Date: Jul 2005
Location: SK, Canada
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Re: Which adjustment on Edelbrock chart for rich at WOT?
Quote:
I'll keep that part in mind too. Cheers.
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Evan B. |
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09-07-2022, 09:42 AM | #27 |
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Join Date: Jan 2013
Location: Eastern TN
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Re: Which adjustment on Edelbrock chart for rich at WOT?
Listen real close for pinging under part throttle and WOT. 37 degrees may give you a little headaches if you get a load of crap gas.
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09-07-2022, 11:39 AM | #28 |
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Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,461
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Re: Which adjustment on Edelbrock chart for rich at WOT?
After your test drive, test for ease of hot start. If you have a bit too much initial, it will start easy cold and be hard to start hot. If it starts easy both hot and cold, you can try a couple more degrees initial. Sometimes it is OK to be a couple of degrees short of max initial so you are sure it will start hot on a hot summer day when you are hauling a load or pulling a trailer or both.
Sounds good in the video. My stock 350 only likes about 13 initial per the factory marks. I have not verified the 0 mark matches true TDC. But a hot day here is 100+F and I am about 1000ft above sea level. With the vacuum pot hooked up, it goes well off the top of the timing mark tab. |
09-07-2022, 04:06 PM | #29 |
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Join Date: Feb 2013
Location: central California
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Re: Which adjustment on Edelbrock chart for rich at WOT?
How much did that timing increase lean it out? I'm curious because after it finally cools off around here, (116 yesterday... tallk about a hot start....yikes) I'm going to get an o2 sensor and do what you're doing. I am appreciative of all the info in this thread. This is a good one.
Last edited by AcampoDave; 09-08-2022 at 05:43 PM. Reason: Typo |
09-07-2022, 11:04 PM | #30 |
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Location: SK, Canada
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Re: Which adjustment on Edelbrock chart for rich at WOT?
When I got home tonight I warmed it up to operating temp and adjusted the idle. I heard chattering so checked the metering rods. They were chattering up and down. I swapped to lighter springs until they would stay down at idle. That took the lightest springs.
Have some of the spring pairs you’ve seen in Edelbrock calibration kits been different lengths? That was the case for mine. One side would stay down with the second to lightest spring but the side with the longer spring was still bouncing so I went down to the lightest pair. Took it for a test drive. No pinging as far as I could tell. Fired right up on hot starts. Here are the new AFR’s. Idle: mid 12’s Normal acceleration & cruising: high 14’s to low 15’s WOT acceleration: low 12’s Here’s the one I don’t understand - during the WOT shift from 1st to 2nd or 2nd to 3rd and also when I let off the gas from WOT: high 9’s. Any ideas???
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09-08-2022, 08:56 AM | #31 |
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Location: Oklahoma City, OK
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Re: Which adjustment on Edelbrock chart for rich at WOT?
Check your vacuum at idle. Your choppy idle vacuum might be in the range the springs normally vary things. If possible, get a long hose and check your vacuum during various aspects of a test drive. Those springs play a major role in adjusting mixture from WOT through cruise and knowing your vacuum through that range would help in selecting the proper springs.
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09-08-2022, 09:13 AM | #32 |
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Location: Bowser
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Re: Which adjustment on Edelbrock chart for rich at WOT?
Your high 9’s might be the secondary air door reaction time is slow and carb stays rich momentarily.
What transmission you running? |
09-08-2022, 09:28 AM | #33 |
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Join Date: Jul 2005
Location: SK, Canada
Posts: 488
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Re: Which adjustment on Edelbrock chart for rich at WOT?
I’ll get some longer hose to run the vacuum gauge into the cab.
It’s the stock th350.
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Evan B. |
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