Help needed 1227747 tune

[dave w]

Do you have a TunerPro RT data log?

Screen shots attached show a sample of information available from TunerPro RT.

The .bin file is helpful. The TunerPro RT data log will be MOST helpful.

dave w

[Sheponaro]

I have since had the vehicle on a dyno to tune and it came up pretty well. But the 1227747 is limited, it has no rev limiter and with the light load and full load maps sorted I still cannot seem to get mid throttle above 4000 rpm to not lean out. I think if I used an ecm with more memory capability I could get the fuel sorted (it seems to be the lack of adjustability running fuel adders)

does anyone know if the 1227808 will cope with 2 tbi injectors and if it has better fuel and spark tables?

[dave w]

The 16197427 is a good 1227747 upgrade option:

dave w

http://www.gearhead-efi.com/Fuel-Inj...Information-0D

http://www.gearhead-efi.com/Fuel-Inj...light=16197427

http://www.gearhead-efi.com/Fuel-Inj...st-impressions

http://www.gearhead-efi.com/Fuel-Inj...g)-Spreadsheet

[PlayingWithTBI]

Or the EBL Flash-II
https://www.dynamicefi.com/EBL_Flash.php

[Six_Shooter]

Your fueling issue, if it's solely tune related would be because the combination of VE1 and VE2 are adding up to over 100. You need to keep this below 100 to not get to the VE limit.

You can increase the BPW constant to get more headroom.

Also check to make sure you're not running out of injector or fuel volume.

[Sheponaro]

Well the ve tables definitely go over 100, I thought this was ok... oops. If I adjust the BPW constant by a percentage can I change the fuel tables by the same percentage then just increase the areas that need more fuel?
I know the injectors are up to it as at full load 6000rpm we were still running slightly rich.
The only other thing that is happening is the manifold vacuum starts to drop (less vacuum) at high rpm due to restriction. I think it is possibly the intake setup as it is a 4wd and used the factory air box.

[Six_Shooter]

I never did that by percentages, I just adjusted the BPW and the main VE table until I got a good idle, and leave enough room in the VE tables to stay below 100.

[Dieselsj]

Well the ve tables definitely go over 100, I thought this was ok... oops. If I adjust the BPW constant by a percentage can I change the fuel tables by the same percentage then just increase the areas that need more fuel?
I know the injectors are up to it as at full load 6000rpm we were still running slightly rich.
The only other thing that is happening is the manifold vacuum starts to drop (less vacuum) at high rpm due to restriction. I think it is possibly the intake setup as it is a 4wd and used the factory air box.

If there was a restriction in the intake anywhere (from airbox to throttle body) then manifold vacuum would actually increase at high rpm - the engine would be trying to take in more air than the airbox/tbi would allow.