Dual sync distributor - Page 3

LNorton · 04-09-2015, 05:00 AM

How's the AFR look up in the RPM range?

Bobby Fazio · 04-09-2015, 02:06 PM

A few cylinders get rich during that little breakup. Right now I have o2 sensor in number 8 and it reads rich at that high rpm. That plug gets wet with fuel also. Number 1 has a good clean color so leaning the fuel map at high rpm will be dangerous to some cylinders as the breakup seems to only affect certain cylinders and right down at the finish line. I was leaning out number 8 to try and help as well but it still happens.

I just want to figure out how to hook the FAST Dual Sync to the Accel DFI ECU and see if the signal cleans up a bit or even just run a test n tune with a crank trigger to see if that clears it up. Then at least I will know where the problem lies.

Crane cams says this HI6 box and LX92 coil should be fine up to almost 8000 rpm and I'm not even close to that.

Bobby Fazio · 04-09-2015, 02:17 PM

MAP - Blue
RPM - Red
Injector Duty Cycle - Pink
Pulse Width - Teal

Ed Wright · 04-09-2015, 05:48 PM

Bobby, if you are not running it in Sequential mode, and individually tuning the cylinders, there is no need for a cam sync distributor.

Bobby Fazio · 04-09-2015, 07:09 PM

I prefer sequential for the extra individual cylinder tuning ability.

04-09-2015, 05:00 AM	#21
LNorton Senior Member Join Date: Apr 2004 Location: RacerTees.com Posts: 505 Likes: 0 Liked 4 Times in 2 Posts	Re: Dual sync distributor How's the AFR look up in the RPM range? __________________ Lee Norton - N229 STK IHRA H/FIA - NHRA O/SA RacerTees.com

04-09-2015, 02:06 PM	#22
Bobby Fazio VIP Member Join Date: Nov 2009 Location: Egg Harbor Township, NJ Posts: 1,468 Likes: 1,450 Liked 4,365 Times in 501 Posts	Re: Dual sync distributor A few cylinders get rich during that little breakup. Right now I have o2 sensor in number 8 and it reads rich at that high rpm. That plug gets wet with fuel also. Number 1 has a good clean color so leaning the fuel map at high rpm will be dangerous to some cylinders as the breakup seems to only affect certain cylinders and right down at the finish line. I was leaning out number 8 to try and help as well but it still happens. I just want to figure out how to hook the FAST Dual Sync to the Accel DFI ECU and see if the signal cleans up a bit or even just run a test n tune with a crank trigger to see if that clears it up. Then at least I will know where the problem lies. Crane cams says this HI6 box and LX92 coil should be fine up to almost 8000 rpm and I'm not even close to that. __________________ '65 Mustang SS/L & L/SA DriverInterviews.com \| App.DragInsights.com

04-09-2015, 02:17 PM	#23
Bobby Fazio VIP Member Join Date: Nov 2009 Location: Egg Harbor Township, NJ Posts: 1,468 Likes: 1,450 Liked 4,365 Times in 501 Posts	Re: Dual sync distributor MAP - Blue RPM - Red Injector Duty Cycle - Pink Pulse Width - Teal Attached Thumbnails __________________ '65 Mustang SS/L & L/SA DriverInterviews.com \| App.DragInsights.com

04-09-2015, 05:48 PM	#24
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Dual sync distributor Bobby, if you are not running it in Sequential mode, and individually tuning the cylinders, there is no need for a cam sync distributor. __________________ Ed Wright 4156 SS/JA

04-09-2015, 07:09 PM	#25
Bobby Fazio VIP Member Join Date: Nov 2009 Location: Egg Harbor Township, NJ Posts: 1,468 Likes: 1,450 Liked 4,365 Times in 501 Posts	Re: Dual sync distributor I prefer sequential for the extra individual cylinder tuning ability. __________________ '65 Mustang SS/L & L/SA DriverInterviews.com \| App.DragInsights.com