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Originally Posted by articfriends
(Post 4769160)
I had/have a hard time believing the standard settings in holleys system would kill GM coils, but I seen it happen. Would have been cool if guy had the good holley coils like you to try. Ive heard from people who been to holley training that their traininng rep told them a certain GM /mercuiser coils were the very best ones. Ive heard the holley coils can easily take 6.5 MS of dwell, would be interesting IF you dyno your motors if upping the dwell to 5.5, 6.5 will do anything for fuel burn/hp past the 4.5 your at , Smitty
My default dwell table that I setup last night was 1.5ms. https://cimg6.ibsrv.net/gimg/www.off...c634211469.jpg |
Dan, are you running knock sensors?
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Rookie, I have often wondered how effective the knock sensors really are?
What have you heard?, and it will be good to hear from others with real world examples concerning them! |
Originally Posted by Rookie
(Post 4769170)
I believe Mercury are the IGN1A coils. Same as Holley, which are suppose to be the best.
My default dwell table that I setup last night was 1.5ms. https://cimg6.ibsrv.net/gimg/www.off...c634211469.jpg they both look the same but there are many different variations on that ign1a coil. They are all not the same. |
This is a shot of my coil installation early on I have made some changes since
https://cimg7.ibsrv.net/gimg/www.off...8f999eb27.jpeg Coil install first placement Day |
You're running a bravo coupler .......:grinser010:......behind that monster.......:readinghelp:
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Tuning knock sensors to a particular engine is key for not retarding and burning the thing down right? I haven`t really looked into it .
I`m running a stand alone knock sensor , nothing tuned to my engine but when I dynoed most it would hit was 78 . in boat it hardly gets past 35. It`s more of a dummy gauge .. if I see more than 35 I know something is up. |
Originally Posted by F-2 Speedy
(Post 4769177)
You're running a bravo coupler .......:grinser010:......behind that monster.......:readinghelp:
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to set the knock freq and sensitivity tables you really need to run on engine dyno and get timing set for mbt and if you can get a set of cylinder pressure sensors and get a good clean timing table the motor and then you can force a little knock and set the sensors off those readings there is no one setting that works for all, every engine/boat is different, its just a microphone that listens so piston rattle valve trail noise, exhaust drone can all register on it, ive seen some secondary harmonics show up on them. like icdedppl said just keep and eye on what the normal feedback looks like and when you start to see something different thats when you know somethings going on
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Originally Posted by abones
(Post 4769174)
Rookie, I have often wondered how effective the knock sensors really are?
What have you heard?, and it will be good to hear from others with real world examples concerning them! |
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