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Title: for you D7EA guys Post by: Jim Ratto on January 22, 2008, 20:01:55 pm We were out of D7EA's at work the other day, but had the Bosch cross refernced plugs in stock....X5DC.
The Bosch plug has a projected nose, forcing electrode farther into chamber. When I was tuning stockers years ago, one trick I learned to get some more response from them was to run a W8BC or W7BC instead of "AC", meaning a projected nose plug. It would certainly sharpen up the idle and throttle response on a stocker or a Kadron motor. I have read that forcing the plug into the chamber further, is like advancing timing, and like having more "squish" in deck. Anyway, for you D7EA guys, you might try the Bosch plugs next time around. Title: Re: for you D7EA guys Post by: javabug on January 23, 2008, 01:31:03 am It doesn't send threads out into the chamber, does it? That's a no-no in the Fisher book, causing detonation.
Title: Re: for you D7EA guys Post by: Jim Ratto on January 23, 2008, 01:33:05 am It doesn't send threads out into the chamber, does it? That's a no-no in the Fisher book, causing detonation. no threads are the same length just the ceramic nose and electrode protrudes. Title: Re: for you D7EA guys Post by: louisb on January 23, 2008, 01:33:54 am Humm, I may give that a try.
--louis Title: Re: for you D7EA guys Post by: richie on January 23, 2008, 02:27:20 am It doesn't send threads out into the chamber, does it? That's a no-no in the Fisher book, causing detonation. no threads are the same length just the ceramic nose and electrode protrudes. Should be ok for N/A but projected tip is a no no for nitrous &turbo applications, cheers richie,uk Title: Re: for you D7EA guys Post by: John Rayburn on January 23, 2008, 03:12:24 am Thanks Jim, I'll try them. I've always been a big advocate of projected nose plugs!
Title: Re: for you D7EA guys Post by: javabug on January 23, 2008, 04:27:05 am Cool, maybe I'll grab a set some time. I"m going to expand my jet collection soon and I'll be due for new plugs.
Title: Re: for you D7EA guys Post by: Dick Mitchell on January 23, 2008, 08:56:44 am I'll switch mine as well and be sure to get back to you on the results. Thanks for the tip
Title: Re: for you D7EA guys Post by: alex d on January 23, 2008, 10:08:26 am anyone tried the DP7EA compared to the D7EA?
Title: Re: for you D7EA guys Post by: Jim Ratto on January 23, 2008, 21:03:07 pm Thanks Jim, I'll try them. I've always been a big advocate of projected nose plugs! sure John. Me too, seems the projected nose plugs in the little stockers sure woke them up. Let me know if you can't find the Bosch anywhere. The OE application was the old E30 BMW M3, S14 engine. We have them here. Jim Title: Re: for you D7EA guys Post by: louisb on January 23, 2008, 21:49:08 pm Slightly off topic. Anyone have any thoughts on NKG vs Bosch plugs?
--louis Title: Re: for you D7EA guys Post by: alex d on January 23, 2008, 22:30:46 pm Jim have you compared the Bosch versus the DP7EA (the projected tip version of the D7EA)?
Title: Re: for you D7EA guys Post by: Jim Ratto on January 23, 2008, 22:34:59 pm Jim have you compared the Bosch versus the DP7EA (the projected tip version of the D7EA)? no, wasn't aware of that plug, to be honest with you. My catalog doesn't cross ref to it. thanks, Jim Title: Re: for you D7EA guys Post by: John Rayburn on January 24, 2008, 06:20:23 am Thanks Jim, I'll try them. I've always been a big advocate of projected nose plugs! sure John. Me too, seems the projected nose plugs in the little stockers sure woke them up. Let me know if you can't find the Bosch anywhere. The OE application was the old E30 BMW M3, S14 engine. We have them here. Jim Title: Re: for you D7EA guys Post by: richie on January 24, 2008, 06:40:09 am DP7ea and DPR7ea are motorcycle plugs,cant help any more than that i am afraid :(
cheers richie Title: Re: for you D7EA guys Post by: nicolas on January 24, 2008, 09:00:12 am Slightly off topic. Anyone have any thoughts on NKG vs Bosch plugs? --louis i have always prefered NGK, but i am not sure why? but i have been told to stay away fro the Champion ones that are grooved and will eat the treads fo you head. |