Need help with fuel system...NOVI and mroe..

91GTturbo · 02-25-2002, 02:58 PM

Whether you run the smaller injectors and an fmu vs. the larger injectors and no fmu is going to have no bearing on whether you pass emissions or not until you begin pushing well over 400 rwhp. If the emissions equipment (i.e; cats and smog pump) are still in place with the list of mods you've gave, then you'll be fine I would think.

You can get away with the 24's and an fmu, but your going to be pushing those injectors well over 90% of their duty cycle. Enough of this can cause injector failure. Plus with the amount of quality parts you have, you could have one big boat anchor if you don't use enough injector.

I run 30's with no fmu now with my setup. I've run 10 lbs of boost with a mixture of race/pump gas with no problems. All blown car react differently. Some need a chip, some don't, some can run 30 with no fmu and no driveability issues, some need an fmu. I say try the 30's minimum, you'll put to much strain on the 24's.

02-25-2002, 02:58 PM	#4
91GTturbo Registered Member Join Date: May 2001 Location: Valdese, NC Posts: 361	Whether you run the smaller injectors and an fmu vs. the larger injectors and no fmu is going to have no bearing on whether you pass emissions or not until you begin pushing well over 400 rwhp. If the emissions equipment (i.e; cats and smog pump) are still in place with the list of mods you've gave, then you'll be fine I would think. You can get away with the 24's and an fmu, but your going to be pushing those injectors well over 90% of their duty cycle. Enough of this can cause injector failure. Plus with the amount of quality parts you have, you could have one big boat anchor if you don't use enough injector. I run 30's with no fmu now with my setup. I've run 10 lbs of boost with a mixture of race/pump gas with no problems. All blown car react differently. Some need a chip, some don't, some can run 30 with no fmu and no driveability issues, some need an fmu. I say try the 30's minimum, you'll put to much strain on the 24's. __________________ 91 single turbo vert