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I am running the full kraken kit along with the provided EV14 700cc Bosch injectors. I have set the required fuel to 4.3 using MS calculations and the deadtime to .9 and .2 voltage correction. When getting IDLE to 14.0-14.7 AFR my VE tables are in the 70s-80s. This feels far to high. I feel like the values are to high as if these injectors are not truly 700cc. When running on 550cc required fuel calculation VE tables look more normal. Bad injectors? Wrong injectors? Leaking possible?
The injectors where not spaced correctly. Kit did not come with any spacers. Buddy torqued em in and the seals were all warped. Opt for some new flowforce 640cc. Everything is running good now.
I am running the full kraken kit along with the provided EV14 700cc Bosch injectors. I have set the required fuel to 4.3 using MS calculations and the deadtime to .9 and .2 voltage correction. When getting IDLE to 14.0-14.7 AFR my VE tables are in the 70s-80s. This feels far to high. I feel like the values are to high as if these injectors are not truly 700cc. When running on 550cc required fuel calculation VE tables look more normal. Bad injectors? Wrong injectors? Leaking possible?
Did you need to procure a pigtail harness (as well as spacers) to use the Kraken injectors or did they plug and play?
Well, they look to be electrically PNP but it is hard to see if they are mechanically.
Are the measurements below equal? Is there any give with the Kraken solid spacer mount like there is with the stock injector?
I measured about a 2.5mm difference in height from stock. I 3d printed spacers / washers that ended up being a bit shy of 2.4mm (my printer’s tolerances seem to be about 0.1mm).
bolted it all up and after I zeroed out the Priming Pulse setting (in addition to the other settings) everything is running fine.
I measured about a 2.5mm difference in height from stock. I 3d printed spacers / washers that ended up being a bit shy of 2.4mm (my printer’s tolerances seem to be about 0.1mm).
bolted it all up and after I zeroed out the Priming Pulse setting (in addition to the other settings) everything is running fine.
What values have you used for dead times / injector size?
The part number 0 280 158 235 is rated to 731cc/min according to bosch au !
They actually state that 731cc/min = 500g/min = 66 lb/hr, that seems a bit off....... 66 lb/hr in a calculator is 693cc/min (much closer to the Kraken 700cc/min specs).
Using them with 1.2ms dead time currently but something feels wrong especially at idle...
They seem to be entering their non linear zone with 1.7-1.8 ms pw in idle and wondering if i am the only one that has that issue...
[QUOTE=Palasito;1632750]Where is your idle VE sitting at ?/QUOTE]
I think you are asking about the settings in “fuel ve table 1” (I might be wrong, I had to Google a bit …) at 900 rpm and fuel load 25.0 and 35.0 I’m at 76. At 1100 I’m at 80 and 81.
I think you are asking about the settings in “fuel ve table 1” (I might be wrong, I had to Google a bit …) at 900 rpm and fuel load 25.0 and 35.0 I’m at 76. At 1100 I’m at 80 and 81.
hope that helps
Yep, that was exactly the setting i asked about ! Thanks a lot !
Are you tuning for 14.7 idle or went richer than that ?
There's no way those dead times are right. Your VE is about 2x what it should be, so you are using VE instead of dead time to make the injectors operate. While this will get a car running, your idle will never be super duper great with bad dead time info.
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Chief of Floor Sweeping, DIYAutoTune.com & AMP EFI
Crew Chief, Car Owner & Least Valuable Driver, HongNorrthRacing
There's no way those dead times are right. Your VE is about 2x what it should be, so you are using VE instead of dead time to make the injectors operate. While this will get a car running, your idle will never be super duper great with bad dead time info.
min what way do you think they are wrong? 10 times too big or too small? the data sheet you can download from here for (what I think are very similar Bosch injectors but it’s what I can find now on my train ride home) has a dead time of 1,020 micro seconds at 12v and 3 bar so call it 1 millisecond, not far off the 0.9 ms I entered.
min what way do you think they are wrong? 10 times too big or too small? the data sheet you can download from here for (what I think are very similar Bosch injectors but it’s what I can find now on my train ride home) has a dead time of 1,020 micro seconds at 12v and 3 bar so call it 1 millisecond, not far off the 0.9 ms I entered.
I don't care what a datasheet says. If you have ~80 VE at idle, your dead times are wrong. Getting the deadtime dialed in is one of the most important parts of a solid idle.
__________________
Chief of Floor Sweeping, DIYAutoTune.com & AMP EFI
Crew Chief, Car Owner & Least Valuable Driver, HongNorrthRacing
Are we talking about VE, or the number you put into the MS table to get the right mixture?
I know they are related, but the number you put into MS is not just the VE.
FWIW, my number at 900rpm/42 map is 80. This gives me very close to 4.7 AFR at these numbers.
I have set the dead times to the spec sheet provided with my injectors.
Last edited by oreo; 01-18-2023 at 09:34 PM.
Reason: correction
I don't care what a datasheet says. If you have ~80 VE at idle, your dead times are wrong. Getting the deadtime dialed in is one of the most important parts of a solid idle.
Agreed.
Your VE table should NOT be that high. You need to get the correct deadtimes and correction.
This was the issue I was having. High VE table and I tried numerous methods to find the deadtimes and tested many of them. VE table was always to high and the car never idled well, randomly died a lot.
After few days of trying I gave up and got different injectors. If you find the correct settings please post I am curious cause I could never get the darn thing to work.
12-20-2022, 02:19 PM
Kraken EV14 700cc Bosch Injector Problems
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