Dynosheet...

[stonecold0469]

ok I took My Car To A Dyno Near Home...The Owner Changed The PCM Settings A Little Bit...Now What I Want To Know Is...It's Running Good? It's A 3100 V6. With No Intake And 2 Flowmasters Out Back...I Also Plan On Adding A Camshaft Soon But It's So Hard To Decide Of All The Options On The Store

[robertisaar]

this is at the wheels?

i'd say its a little too lean, i like 12.5:1 at WOT...

[stonecold0469]

Yeah...and The Air/Fuel Mix Has Come A Long Way Down...First Run A/F Was At 16.9

[robertisaar]

Yeah...and The Air/Fuel Mix Has Come A Long Way Down...First Run A/F Was At 16.9

how in the hell do you manage that? almost 17:1, that would produce so much knock, i wouldn't touch the thing...

[stonecold0469]

here's the deal with it...the car is struggling a lot to get power...a mechanic told me to add a Fuel pressure regulator...i did and at the dyno the first run said that...the owner automatically turned off my car and had eyes as big as an owl...he corrected a lot of problems and set the regulator to 45PSI and then that sheet came after 2 more tries. that he did...he used a tech 2 for it...after that last run he told me the complete PCM was running perfect and all engine parameters were fine...

here's the dyno clip

http://www.youtube.com/watch?v=ZUv-jJJsDpc

[robertisaar]

if i saw a 17:1 A/F ratio, i would have eyes that big too.... and the stock fuel pressure regulator is set for i think 42.5 PSI, so adding another didn't do much. you obviously had some serious tune issues... running at 17:1 is going to

1. make NO power
2. eat a hole right through your pistons from detonation
3. shoot the headgaskets right off(again detonation)

[stonecold0469]

aparently he got it fix...but are those bad numbers? and if i'm racing the car in 2nd gear and past 80 miles he starts to struggle to get more power and the service engine soon light starts flashing...on and off...

[robertisaar]

you might want to check into that SES light before doing anything else...

[stonecold0469]

heheheh...i know... the SES light had Some Codes, like, IAT Sensor, MAF Sensor, EGR, And Cooling Fans...They Are All Fix...But When I Drive After 80 Miles in 2nd Gear Not In 3rd Like It's Supossed to It Does That...Then Turns Off...And stays Off...And Just In case...i Do not know why the tuning thing...no one has tuned my car...till that day at the dyno.

[Superdave]

I bet you have an exhaust leak somewhere..

wideband readings at the tailpipe are usually not very accurate, if you have any sort of holes in the exhaust it can really throw off the readings as well.

your results look average for a 3100 /auto.

[stonecold0469]

hmm...i'm re-doig my exhaust again...i'm planning of upgrading to 2 1/2 and add 2 super 44s to the back after cat...

[robertisaar]

factory duals or what?

and super 44s sound AWESOME on 60* motors(sound like LS1s). if i ever get a chambered muffler, that'll be it, until then i'll keep my glasspacks.

2 1/2(ID) might be a little big for a dead stock car... 2 1/2 OD would probably be fine though, just make sure its mandrel bent...

[stonecold0469]

Id or Od???

[robertisaar]

inner diameter and outer diameter...

[stonecold0469]

ooo sorryp outer...after cat it goes a Y and then The Flows