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Title: Magneto and sparkplugs Post by: Berger on May 08, 2006, 10:36:28 am I run a 2276 with SF heads, 11,5:1 komp and a Joe Hunt magneto. This works fine except for the plugs beeing worn out after a few runs. The plug itself looks fine, but the spark is just not god enough to get the engine started. New plugs and it fires up just fine. I have tried several brands of sparkplugs with the same result.
Last I used Bosch W7AC with std gap. Anyone with some magneto excperience who can help? (http://forum.vw2you.com/Public/Uploads/Post-24-2381-MotorForfra.jpg) Title: Re: Magneto and sparkplugs Post by: Ole on May 08, 2006, 21:20:32 pm Last season I used BERU 14-7AU, that's equal to your BOSCH W7 AC. They work fine (Joe Hunt mag; CR 12.0; Mallory Pro Wire). I had problems getting the engine started with the stock starter. A late 6V starter run with 12V solved the problem.
Saludos, Ole Title: Re: Magneto and sparkplugs Post by: Berger on May 09, 2006, 08:03:07 am Thanx Ole. I use Taylor wires.
So You say low "starter-rpm" was the problem? Means that the magneto produce weak spark at very low rpm? How do You gap Your sparkplugs? Title: Re: Magneto and sparkplugs Post by: Ole on May 09, 2006, 11:52:36 am So You say low "starter-rpm" was the problem? Yep, at least it solved my case. I almost went mad when the engine didn't fire up. After 1/2 hour rechecking everything without any result, I put 24V on the starter for the last try... it started up immediately. I was happy, my neighbors not... ;D I use the std spark gap (approx. 0.7mm) Saludos Ole Title: Re: Magneto and sparkplugs Post by: Fastbrit on May 09, 2006, 14:02:02 pm Part of your starting problem is that the plug gaps are too wide for a magneto. You should regap the plugs to 0.5mm. 8)
Title: Re: Magneto and sparkplugs Post by: Ole on May 09, 2006, 16:14:26 pm Part of your starting problem is that the plug gaps are too wide for a magneto. You should regap the plugs to 0.5mm. 8) Thanks for the advice! I'll try that next time. I need to figure out some other spark plugs anyway. Due to some head welding, it was necessary to modify them to accept 12mm plugs. Guess I'll try NGK DPR5EA-9 or NGK DPR6EA-9. Any suggestions? Title: Re: Magneto and sparkplugs Post by: Berger on May 10, 2006, 10:10:26 am Thanks for the replys :)
Re-gapping of sparkplugs and installing a new starter wil be done!l Title: Re: Magneto and sparkplugs Post by: Jon on September 01, 2006, 15:14:50 pm Hey, guys.
Im putting together my 2176 these days, and the Vertex gets a few needed goodies to. A new cap, rotor and a 12° ignition curve. I also want to customize my Pro controller to two step... as I have a serious problem with growing horns on the start line. ;D But what kind of ignition wires should I get, I don't want anythig to fancy as I want a "old" look to my engine. Does summit have anything for me? |