Direct Injection Capability

Postby **BoostedSnail** » Fri Feb 08, 2019 1:10 pm

Many tuners using modern engines such as GM Alloytec and newer VW engines have Direct Injection. Implementing this would allow us to use these engines with Elite series tuning capabilities

Postby **mweldon** » Wed Mar 20, 2019 4:05 pm

BoostedSnail wrote:Many tuners using modern engines such as GM Alloytec and newer VW engines have Direct Injection. Implementing this would allow us to use these engines with Elite series tuning capabilities

Agreed, I'm swapping in a GM Alloytec Cadillac LF4 and am having to utilize the stock ECU and hptuners.... Haltech was my first choice until I realized there was no GDI/DI capability in the Haltech series...

Postby **TeeJayHoward** » Thu Apr 25, 2019 12:45 am

I'd like to second this feature request. Direct injection's been in use in cars for over 20 years now. It honestly never occurred to me that the Haltech ECUs COULDN'T run those engines.

For my own personal curiosity, what are the difficulties in running a DI system vs. a traditional port-injection setup?

Postby **BoostedSnail** » Mon May 06, 2019 2:52 pm

TeeJayHoward wrote:I'd like to second this feature request. Direct injection's been in use in cars for over 20 years now. It honestly never occurred to me that the Haltech ECUs COULDN'T run those engines.

For my own personal curiosity, what are the difficulties in running a DI system vs. a traditional port-injection setup?

For the most part the pressure is different, eg; the base fuel pressure in Haltech is 43 psi give or take? The alloytec GM v6's base pressure is around 3000 psi. The other problems are that it messes with injectors because they are spraying differently and also other sensors like Widebands. Temps get screwed around too because the vaporisation happens in the combustion chamber.

Can't be that bloody hard to work on for us though can it?

Postby **HaltechMatthew** » Tue May 07, 2019 11:36 am

It can be difficult.

Especially so when the demand for it is small compared with port injection use in motor sport, the technology to drive it is utterly different, and with all respect given most people would not have the slightest idea on the correct start or end angles to not cause a melted valve or piston. This last part becomes difficult for anyone outside of a lab to tune from scratch especially when these days we are seeing specific piston and combustion chamber shapes designed to have fuel injected at a very precise angle for a given load and rpm. I have been tuning engines for a very long time and doing this from scratch scares me! It's different when people are reflashing work the OEM has spent countless hours and money on, but try and figure it out on your own and see how difficult it gets to get it right without all of the equipment under the sun.

Anyway...
It will be supported one day, but for our target market it is a 1% thing even though the engines are getting more common year-on-year.