Is there any trick for finding the perfect amount of dwell WITHOUT using an oscilliscope?
I'm just setting up my ignition now and found that at 3.0ms I was getting misses at idle. Upping the dwell to 4ms seems to have fixed that, but now I'm wondering if I shouldn't increase it more, but worry about overheating the coil etc..
The perfect amount of dwell
Forum rules
Read the manual to see if your question is answered there before posting. If you have questions about MS1/Extra or MS2/Extra or other non-B&G code configuration or tuning, please post them at http://www.msextra.com The full forum rules are here: Forum Rules, be sure to read them all regularly.
Read the manual to see if your question is answered there before posting. If you have questions about MS1/Extra or MS2/Extra or other non-B&G code configuration or tuning, please post them at http://www.msextra.com The full forum rules are here: Forum Rules, be sure to read them all regularly.
-
BottleFed70
- Helpful Squirter
- Posts: 91
- Joined: Fri Jun 24, 2005 2:22 pm
The perfect amount of dwell
1970 Ford Mustang
MSII, v3.0 PCB, v2.36 firmware, Megatune 2.25
MSII, v3.0 PCB, v2.36 firmware, Megatune 2.25
Lance wrote this up: http://www.msefi.com/viewtopic.php?t=7281 but needs some basic info that I don't always have. In this next ignition install I'm doing (single coil V8 ), I will be setting dwell and will try the thory that not enough causes misses and too much causes the VB921's to run hot. So, I'm going to note the dwell that sparks consistently and then increase it until the VB921's start getting warm. If the spread is narrow, I'll leave it there. If the spread is wide, I'll split the difference... or something.
That's my hairbrained idea anyway.
I'd love to hear of any other techniques!
David
That's my hairbrained idea anyway.
I'd love to hear of any other techniques!David