What would happen if I ran 30# SVO injectors with a stock OBD2 tune?
Will the ECM just shorten the injector pulse width? Or is there more to it with these particular injectors?

I was planning on converting to OBD1 for tunning and keeping my OBD2 for inspection/emissions testing but if its gonna throw a code I might as well just program the OBD2. Currently doing heads and cam.

 

The injectors will dump too much fuel and you will most likely foul your plugs... I wouldn't recommend it in other words.

 

The ECM wont fix this? I thought it would initially be rich but the BLM's would adjust once it reaches closed loop and the O2's are online. I was woried about the ohms being different. I know the performance will be off (I want OBD1 for that) but I was hoping OBD2 had enough control over the pulse widths to handle it well enough to at least not foul the plugs or set an SES.

 

No, it won't.

 

Dang, So your saying thats too much of a streach for BLM's? Well I'm not programing my OBD2 and also converting to OBD1 its just not worth it.
Are there any other options I'm missing, (besides putting the 24# in with the OBD2 for inspection) ?

 

The computer will not compensate for such a big difference. The car will run crappy no matter what, unless you get it programmed for the right injectors.
Why would the OBDI conversion be not worth it? Also why not program your OBDII?

 

I like the OBD1 conversion ALOT! The flexability and readily available programs and files and all cheaper than programming OBD2. That was my plan when doing the heads and cam (in progress). I planned to keep my OBD2 stock for the one day a year when I have to pass the plug and play OBD2 emissions testing which with rear O2 sims I can (they do no actual sniffer test).
From what I have read I'll need 30# injectors for this set up (XE230/236 Lloyd E. heads) which means it(OBD2) needs to be programed just for the drive over there. Now if I cant just unplug a programed OBD1, plug my stock OBD2 back in for the one day a year when I go for inspection, if I have to program it also thats 2X more $$. Right??

 

Madwolf I was wondering if you could possibly lend my your expertise for 1 second. I had 36lb SVO injectors now in my program and the car is running reallly rich. I know the SVO's are rated at a lower PSI (39) than ours (42.5). Do you have any idea of the top of your head what constant would work good for the time being before I go on the dyno?

 

New flow rating for the 36 lb/hr injectors (originally rated at 39.2 PSI) is 37.923 lb/hr. Try a 38 and watch your BLMs. If it's still rich, add one more lb/hr and watch them again. Or you could just start with 40.

 

BTW, stock pressure is 43.5 PSI. (3 bar)

 

Is the OBD1 good for more horsepower over the OBD2 or is that a myth? I have read or heard that before but its never been explained. Esentially its got to come down to a spark curve and a fuel curve both with many variables affecting them especially at partial throttle. WOT operation should be pretty straight forward right? Just dont know where the differences would be between the two PCM's.

 

Thanks a ton. Ill try 38 and see how that goes.

Thanks for the correction too.