half throttle vs. full throttle

[sleeperspirit]

it seams like my daytona is quicker at half throttle than full throttle.today i hooked up my a/f gauge and it says its rich above like 2500 rpm. i thought it was going lean so what should i do? adjust fuel pressure? well maybe im just crazy

[tryingbe]

Leave it alone.

Part throttle usually have more aggressive timing and leaner fuel tables than full throttle. You shouldn't change anything unless you know exactly what you're doing.

[speeduphoria]

also why you should not run lots of boost in part throttle as it will be lean and too much timing(like said above). Most aftermarket cals change so both tables are the same or close(WOT and part throttle), then you can part throttle boost all you want

[sleeperspirit]

i was told it had a fwd performance stage 5 cal

[speeduphoria]

I would call Cindy about it, what FP are you running and what injectors?

[GLHNSLHT2]

A wideband A/F gauge??? Don't trust the narrowband gauges, they don't tell you anything except that your narrowband sensor is working ok. If you want to know how much or how little fuel is actually getting through the motor you need a Wideband a/f setup.

[sleeperspirit]

no i dont have a wideband o2. the one i have is hard to read it seams to jump around too much. im not sure on the FP ill have to take a look, and i was told there mopar +20's

[Simsy]

Zerin, i'm pretty sure there's a TU cal in that daytona, and your correct on the +20s.

[sleeperspirit]

did you notice this when you had it simsy?

[GLHNSLHT2]

Get a wideband O2, it'll tell you exactly how rich or lean you're running. I learned this the hardway. The Narrowband O2 sensor is useless for tuning. I added 40% more fuel and the narrowband said I was exactly the same richness. Got a wideband and found I was flooding the car at over 9.0:1. Car is MUCH faster now.

[Simsy]

Quote:

Originally Posted by sleeperspirit did you notice this when you had it simsy?

oh yeah it has always been that wayy...my spirit does the same thing...i think any TD i have had has felt like that...i think so anyway.

[sleeperspirit]

yeah maybe its juist been awhile since ive driven one, im used to working on them more than driving them lol