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Ken911's Avatar
 
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Oh OK now I'm interested!!!I thought it was just a switch that swapped between two maps.
Whats the correlation between cc size of injector and the lbm rating? I have 80# injectors from Darrin. Those were the biggest ones.
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's.
05 Cayenne S lapis blue

Last edited by Ken911; 02-13-2014 at 06:21 PM..
Old 02-13-2014, 06:19 PM
  Pelican Parts Technical Article Directory    Reply With Quote #41 (permalink)
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This might help getting the flex fuel sensor plumbed in with AN lines.

Those with a GM flex fuel sensor and AN hose? - evolutionm.net
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Old 02-13-2014, 07:19 PM
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Basically add a zero. You have 800cc injectors. I was running those also on my last build. I quickly became a NON FAN of Siemens deka. They are not very stabil at small pulse widths and I was maxing em out at mid 500 hp on e85
Old 02-13-2014, 07:48 PM
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Old 02-13-2014, 07:54 PM
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Nice install steve. And it's not in the engine bay if a line lets go!
Old 02-13-2014, 08:13 PM
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Quote:
Basically add a zero. You have 800cc injectors. I was running those also on my last build. I quickly became a NON FAN of Siemens deka. They are not very stabil at small pulse widths and I was maxing em out at mid 500 hp on e85
You are spot on! I spent 2 years trying to understand why I was having trouble tuning my engine with MegaSquirt. Come to find out, the Deka's hated less than 2.0ms's of opening time. At 0.9ms, they were extremely unstable making for huge AFR swings.

Thanks to "Lapkritis", changing my squirts/cycle from 6 to 2 made all the difference!
Old 02-13-2014, 08:21 PM
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oh ok well anyone here want some new unused 80#injectors?
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's.
05 Cayenne S lapis blue
Old 02-14-2014, 04:59 AM
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hey i bet darrin will take em back. you can drop em off when u pick up your fuel sensor. i did one more kinda trick thing and that is i can watch my fuel pressures on the laptop and obviously data log to see whats happening up top. check that option out with derwood while your there
Old 02-14-2014, 05:12 AM
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Ok cool i'll have to take a drive up that way one of these days. It's a 2 hour drive for me so I dont head up that way often.
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's.
05 Cayenne S lapis blue
Old 02-14-2014, 11:06 AM
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Does he carry the flex fuel sensors? I didnt see it on his website.
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's.
05 Cayenne S lapis blue
Old 02-14-2014, 11:35 AM
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Give him a call a day or so before you go up
Old 02-14-2014, 11:38 AM
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found one on e bay 50.00 made by the same company that makes the 150.00 siemens and the 554.00 haltec sensors lol
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's.
05 Cayenne S lapis blue
Old 02-14-2014, 11:55 AM
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I still have bunch of tubing to get from him when i figure out what i need in the way of intercooler piping i'll take them up there then.
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's.
05 Cayenne S lapis blue
Old 02-14-2014, 11:58 AM
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Nice placement of the Ethanol Content Sensor, Steve! :-)


Slightly off topic, thinking out loud here:
xbmwguy and Tippy -- are you both running MS?
I wonder if it's something in the injector driver software or hardware unique to MS? It seems like all engine management systems have their own approach to things, and maybe this particular combination is not a good one? The Dekas have worked perfectly for us with AEM and Motec, 60# and 80#, gasoline and e85. We have a built 930 in the shop with cams and it idles just fine <1,000rpm, great low rpm drivability with no hesitation or flat spots.
Thinking about what the differences could be?
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Old 02-14-2014, 04:01 PM
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More porn. Just had to
Old 02-14-2014, 06:00 PM
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Quote:
Originally Posted by Ken911 View Post
oh ok well anyone here want some new unused 80#injectors?
Um yes, I do. I'll PM.
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Old 02-14-2014, 06:51 PM
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I really like the design of those heater boxes on your headers. Looks really simple yet effective.

Ken, be careful with the eBay flex fuel sensors. Some of them are cheap Chinese replacements. I wouldn't trust them.

Chris, I'm also running the 80 lb Siemens deka injectors on a Ms3 pro in full sequential. I am running them with a 993 fuel pressure regulator. I can get the car to idle very nicely at just under 1000rpm. However, my afr has to be around 13.0 to do so. I used the dead time specs provided by who did my flow matching. My next step ( and I'm wondering if you do this) is to hook up the oscilloscope and check each injectors wave form on the actual car as it's running. This way I can find the exact dead time and hopefully get my idle a little closer to 14.7.
Old 02-14-2014, 07:22 PM
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What dead time are you running? I want to say I was around .83
Old 02-15-2014, 04:30 AM
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I found dead time makes a big difference when it comes to tuning. It's best to find manufacturers numbers so it's spot on.
Old 02-15-2014, 05:25 AM
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Originally Posted by nocarrier View Post
I really like the design of those heater boxes on your headers. Looks really simple yet effective.

Ken, be careful with the eBay flex fuel sensors. Some of them are cheap Chinese replacements. I wouldn't trust them.

Chris, I'm also running the 80 lb Siemens deka injectors on a Ms3 pro in full sequential. I am running them with a 993 fuel pressure regulator. I can get the car to idle very nicely at just under 1000rpm. However, my afr has to be around 13.0 to do so. I used the dead time specs provided by who did my flow matching. My next step ( and I'm wondering if you do this) is to hook up the oscilloscope and check each injectors wave form on the actual car as it's running. This way I can find the exact dead time and hopefully get my idle a little closer to 14.7.
the one i got was made by continental same company that makes all the ones pictured above. Funny they just put a sticker on each one with whatever brand.
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's.
05 Cayenne S lapis blue

Last edited by Ken911; 02-15-2014 at 04:55 PM..
Old 02-15-2014, 04:49 PM
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