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#1 |
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Join Date: Oct 2003
Location: Lower Slower Delaware
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Bobby
Have had the same problem with using the stock distributor with bank to bank and the MSD dual sync with sequential. Talked with David no longer with FAST and Jeff my trusted chassis dyno and tuner it is the distributor being driven by the cam seeing harmonics from valve springs etc. At least with a Ford it is driven on the front as opposed to SBC which is in the back and sees it all. Crank Trigger cleans up most of the noise and provides more accurate timing would be the fix. But racing stock it's a no go so do your best to shield the noise and deal with it. We can chase our tails with electronics to be more accurate therefore efficient therefore fast but still we need airflow to add fuel to tune. Stock is not Stock Stock is way cool Stock Eliminator Serious Fun
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Frank Ferrucci I/SA 1271 "Be Thankful for the Gifts You are Given" |
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#2 |
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Join Date: Dec 2008
Location: Rainy Washington
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Bobby yes i am using FAST dual syn dist. As far as my tach goes I dont use the replay on the tach just down load it to my computer via Tach facts software from autometer. I will check on the sample rate of both for a comparison will let you guys know what i find there.
Novadude Fast system datalogger is part the fuel injection ECU. So there is not a way filter it. will double check the schematic. let me know if I am wrong, may learn something new. Signman are you saying David Page is no longer with fast, if so what happened and where did he go?
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James Boyce 6052 K/SA Stock National record holder 2015,2018,2 times in 2022,2023 |
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#3 | |
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Location: Lower Slower Delaware
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There was a major announcement last week. Edelbrock bought Compcams a while back. David moved on to a leadership position at Edelbrock believe heading a team that looks at trends and future projects and products.
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Frank Ferrucci I/SA 1271 "Be Thankful for the Gifts You are Given" |
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#4 |
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Location: Egg Harbor Township, NJ
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I’m using copper tape as a shield on the cam signal, crank signal, and their shared signal ground. All 3 wires come out of distributor together along with 12v power and I have the shielding grounded at one end only. I separated the 12v wire right out of distributor as close as I could and put a ferrite bead on it. I also put ferrite beads on water pump 12v, alternator charging wire, and twisted the coil pos/neg wire from ignition box to coil and put one bead on the twist. Am I using them in the right spots? Should I put ferrite beads on the already shielded signal wires also? Thanks.
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#5 |
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Ok finally got to look at both data loggers samples, The fast system sample is .05 seconds and my tach samples at .01 seconds. I know i can export my fast system to excel, i will check to see if i can export my tachfact software to excel also and the overlay a same run to see what is looks like. My tach down loads look much smoother then the fast system, I could be it is filtered some?
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James Boyce 6052 K/SA Stock National record holder 2015,2018,2 times in 2022,2023 |
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#6 |
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Yes I believe the tachfacts is being filtered and you are correct is it actually a better sample rate than the FAST. Mine does look better on tachfact but definitely not as nice as the super stocker looks on there. I went overboard with wire shield and ferrite cores so I will see what happens.
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