1000cc low imp inj issue... dead time ?

Neke1point0 · Post by **Neke1point0** » Thu Apr 16, 2009 8:39 am

I took out my 450cc injectors and upgraded to 1000cc i have a 255lph-hp in tank. It is on a nonvtec map for a F22B2 motor. as of right now im only using the low speed map. The map is flooded with fuel in the high end attmepting to get fuel in the proper areas however its not dropping in fuel as it should in WOT. On the wideband it is spiking to 13.5+. I noticed that when i change the dead time higher in the 14 volts it richens up the map considerbly at idle. I read a few post saying that 1000cc inj they had to adjust their dead time but their maps had the 404 error or whatever so i couldnt read them... Should the dead time be increased ? Should i activate vtec and use the high speed maps for more adjustability throughout the pull ? Any help is greatly appreciated....Hondata/Spunkster TIA !

Also im using a 224xlc Dynojet

Post by **Spunkster** » Thu Apr 16, 2009 9:42 am

You must use the proper voltage vs. dead time compensations for your injectors. Once you have that correct you will then need to adjust the trim until you get the AF close to where it needs to be, then start making changes to the tables. Changing from 450cc injectors you may find it better to just start from a new stock basemap from File, New.

Neke1point0 · Post by **Neke1point0** » Thu Apr 16, 2009 12:10 pm

Thanks for the reply !

Do i need to contact the manufactor for the correct dead time per voltage ? Or how do i find out what the correct dead time/voltage is for these injectors ?

currently i have them at .80 dead time at ~14.35 volts. I have started a new map for these injectors. At WOT it will dip to approx 10 then steady at 11.8-12.0 then start climbing ! FAST !

Sadly I have more boost and less power then when i had the 450cc's... Its driving me crazy lol ! Thanks again for the reply, i really appreciate it !

Post by **Spunkster** » Thu Apr 16, 2009 1:22 pm

Contact the manufacturer or whoever you boght them from.

Neke1point0 · Post by **Neke1point0** » Thu Apr 16, 2009 2:06 pm

ok so i just got off the phone with Delphi and they have no clue what im talking about. Anyone other suggestions/liinks to figure this out ?

Neke1point0 · Post by **Neke1point0** » Thu Apr 16, 2009 4:25 pm

maybe i wasnt wording it correctly to delphi...

I asked "what is the proper voltage vs. dead time compensations for my 1000cc low imp peak/hold inj" and they were like uhhhhh get the part number of the injectors and we'll see if we can help.

Anymore suggestions ?

civicduty · Post by **civicduty** » Sat Apr 18, 2009 10:20 pm

i just came from my tuner and he wanted to more about the "dead time" he had a pretty good idea what it does but isn't 100% ..... any more info on this would be greatly appreciated ...... i didn't mean to thread jack hear .....

Martian · Post by **Martian** » Sun Apr 19, 2009 4:45 am

http://www.yawpower.com/injectordeadtimesarticle.html

Neke1point0 · Post by **Neke1point0** » Fri Apr 24, 2009 6:57 pm

civicduty wrote:i just came from my tuner and he wanted to more about the "dead time" he had a pretty good idea what it does but isn't 100% ..... any more info on this would be greatly appreciated ...... i didn't mean to thread jack hear .....

Not a prob at all, im still working on this issue ! :evil: I have called delphi and they dont have a clue. I was transfered around for like 2 hours it seemed like and no one could help me. Their "head tech" didnt even know what dead time was ! I dont know what to do at this point. I made more power with less boost and smaller injectors ! Its driving me crazy !

I spoke to a couple different tuners and they have all said different things. one guy said you dont need to change the volt comp bc i still have low imp injectors just changed the cc... others said it needs to change to compensate for the larger inj. I have changed the volt comp different ways but its still leaning out at the same spot.. if changed the points on the col and still same issue. Anyone with any previous experience with this please chime in with some info :lol:

KING · Post by **KING** » Tue Apr 28, 2009 12:18 am

I dont know much so Im just speaking from what a well known tuner told me. he said it really doesnt matter what the dead time of the injectors is. He was telling me the votae and dead time is changed by thee injector driver. he was tell me this because I told him I was using a fjo driver. he told me just to play around till I found what the car liked. which cleared everything up like muddy water for me.lol good luck

Neke1point0 · Post by **Neke1point0** » Tue May 05, 2009 5:53 pm

thanks for the help. If i change the numbers as much as .1 + or - it dramatically changes the mixture. No matter what i start out the map at it will continue to lean at the similar spot.(in high load)

Someone also suggested the resistor box could be bad. Has anyone heard of this being an issue ?

KING · Post by **KING** » Tue May 05, 2009 9:39 pm

well last week I bought a set of the bosch dynamic 1000 cc high independence injectors and they are great. they came with all the info needed to input into the voltage compensation.

Neke1point0 · Post by **Neke1point0** » Sun May 17, 2009 5:37 am

KING wrote:well last week I bought a set of the bosch dynamic 1000 cc high independence injectors and they are great. they came with all the info needed to input into the voltage compensation.

NO WAY !?! :evil: what are they values if you dont mind me asking ?

rudebwoy · Post by **rudebwoy** » Sat May 23, 2009 3:18 pm

it is sad that pte don't have a clue about the injectors they are selling either. I am using 1600cc pte, and I called pte and they flat out told me they don't know. so I searched and found this. http://injector-rehab.com/kbse/lag.htm for 1600 I am using the ford 150lbs table. but they have the pte voltage for 1000cc listed.

hybrixt · Post by **hybrixt** » Tue May 26, 2009 6:57 pm

Are you using a resistor box?
If you are, i bet the wiring is your problem.
I've seen it plenty of times.