help me understand calibrated maf sensors and injectors

[Willybill32]

I think the General was on to something for sure. Car ran out of fuel with the 331 on the dyno with the 42's and the tuner and I both were scratching our heads. He turned the pressure up from 39 psi to 46 psi and it "solved" the problem. Fast forward a few years I reworked the fuel system to an 6AN feed and return and had the injectors cleaned. I got the injectors from a buddy and they came off his 2001 Lighting. I just put them in the car and never thought about it. The guy that cleaned and flowed them said their average output before the cleaning was around 38 lb/hr and after it was 43 lb/hr. Also said the spray patterns sucked.

I also found an issue with the cold air kit which was my doing form years and years ago. I used a Procharger adapter to the 2000 GT MAF which necked down to about 2-1/2". It wasn't an issue with the 306 but the tuner was telling me I needed more air when the 331 was tuned. That is what got me looking so I got rid of everything except the part that bolts to the inner fender and the air filter mounts to. Its all 3-1/2" now and I transitioned the lip of the MAF to match the adapter that I bolted to it to reduce turbulence.

So there were issues from my ignorance that have since been corrected.

Funny how we just keep making “adjustments” to our cars. For my dyno run, I had a CAI and stock catted H-pipe. I have since gone back to the stock airbox, less the restrictor, and replaced the stock H-pipe with a Bassani catted X-pipe. I have no idea how I’ve changed the HP, but my seat-of-the-pants dyno doesn’t notice any change.

I found this thread in a search for “19lb injectors”, trying to find how many HP the stock injectors can handle, because my car seems to run a bit rich, and I got 12 MPG on my last tank, making me wonder if I might have too much injector. I guess not, and the reason the mileage is so bad is probably because it’s close to WOT most of the time I’m driving it! It’s such a gas to go through those gears!

Bill

 

[AeroCoupe]

That damn right foot is the cause of most mpg issues....