EVO Injectors in 95 2G DSM AWD

[tacoman123]

I was told that EVO injectors would work on a 2G AWD, does that have any bearing of truth? I'm looking to put a Big T28, and want something a little bigger than the stock injectors, but want to use the stock ECU. Is that possible? Are the plugs the same?

Thanks alot.

-Tahleel

 

[Budget90GST]

While they do fit, you will still need a way of compensating for the "slightly" bigger injectors. EVO 8 has 560 cc's. Maybe have a chip for them if you have an eprom ecu or a cheaper alternative is an AFC. Goodluck.

 

[Apeximprt2nr]

Exactly what Budget said, you'll have to get an AFC or tuning device to compensate for the larger injectors. Just out of curiosity, why would you go with EVO8's? Why not someone like Denso?

 

[andymoraitis]

Correct, these are a direct fit. Since they're Denso OEM units, they will flow closer to 600cc and provide plenty of headroom for mid-sized turbos. Keep in mind that if you go the AFC route that these will require a bit more airflow subtraction to get right than standard 550's. If you go EPROM ECU, Jeff at DSM Chips can dial in the deadtime and global adjustments perfectly.

Andy

 

[tacoman123]

I was under the presumption that they would work with the stock ECU, without an AFC or any other way to control fuel for some reason.

I plan on going Megasquirt soon anyways.

Thanks alot.

-Tahleel

 

[andymoraitis]

Tahleel,

Our airflow systems aren't true MAF where you can install larger injectors and have the ECU automatically compensate. A VAF (voulme airflow) system implies that fuel delivery will be based on how much air the ECU sees. In order to make a larger injector flow like a stock one, airflow will have to be subtracted by a proportionate amount to the increase in injector size. As an example, when switching from 450cc to 550cc injectors, 18-20% airflow is subtracted with an AFC in order to fool the ECU into thinking that stock injectors are present. With an EPROM ECU or DSM Link, adjustments are made to deadtime and global settings which will allow the injector to function like a stock unit but without the increase in timing that results from subtracting airflow.

Make sense?

Andy

 

[Black95TSIawd]

I have evo 8 injectors in my car. big16g at 23psi and i was at -21 give or take 1 or two points on an afc. 11.3 afr. Boost was set to 19psi and -19 across the board on the afc and i picked up 2mph from the 23 psi run. Just some food for thought.

I've heard a lot that these injectors flow more then 560cc, but my experiences are telling me they dont.

 

[andymoraitis]

Injectors vary and the best way to tell is to have them cleaned and flow tested. I would do this with injectors that were used anyway. As far as your air/fuel ratio, it's still a bit rich. I run a Dejon Sidemount and hit 25-26psi daily on 93 octane with 19 degrees of timing on an 11.7:1 AFR. Technically, there's no reason to shoot for anything less than 11.5:1 unless you're limited by 91 octane fuel. If you have 93, you can go leaner on the AFR and squeeze a bit more from it.

Andy

 

[WatchItExplode]

I have evo 8 injectors in my car. big16g at 23psi and i was at -21 give or take 1 or two points on an afc. 11.3 afr. Boost was set to 19psi and -19 across the board on the afc and i picked up 2mph from the 23 psi run. Just some food for thought.

I've heard a lot that these injectors flow more then 560cc, but my experiences are telling me they dont.

What is your injector duty cycle @ redline with 23 psi?

 

[Black95TSIawd]

What is your injector duty cycle @ redline with 23 psi?

you'll have to give me sometime to borrow a logger from someone.