S52 dyno results - low?

[grib]

the injectors are probably not the cause of your rich condition.

I think it's possible (although counter intuitive) that they are.

My understanding is that at WOT the ECU is in closed-loop mode, meaning that it does not take input from the oxygen sensor to make A/F adjustments.

With such mis-sized injectors (relative to what the software was tuned for), the adaptation probably had them right at 100% duty cycle (where 24 lb injectors might only be at, let's say 80%). This could end up causing a richer condition than anticipated at full duty cycle/full fuel pressure brought on by WOT.

I have ordered a set of 24lb injectors, but I'm not sure if I'll take the car back to DynoSpot. I was a little bit unhappy when they charged me for a full hour of dyno "tuning" time after three runs and no diagnosis/recommendations.

[nando]

that could be - injectors tend to go non-linear at the edges of their operating range. in any case, you already know that bigger injectors are needed for the power you're putting down.

btw, if you want to do real dyno tuning, look for somewhere with a load brake dyno - dyno dynamics or mustang, generally. they won't read as high as the dynojet though, if you're just looking for a # to brag about :p

[mazur]

Agreed. At 10 PSI you see the S50/S52 engines in the low to mid 300's.

Not a bad number for 10 psi on an M20 - but it can hardly be described as *bone stock*

A little conservative, don't yah think?

More realistic power output for 10psi on an S50 is 400+rwhp.

:pimp: