*Official* L99 Dyno Thread

[ICEMAN169]

Originally Posted by GMRULZ

Stock , 600 miles, pulled 319rwhp back to back twice, then removed ECM fuses for 5 minutes to reset LTFT`s (Long Term Fuel Trims), immediatley ran it again and picked up close to 8 rwhp. This is that last pull.

I am new to Camaro5 and don't know how to start a thread. I saw what you said here about pulling the fuse on the ECM for 5 minutes affecting the long term fuel trims. Here is my problem: Went to the dragstrip to see what my L99 would run stock and some butthead at the track told me to run with no air filter to get more power, so like a dumdass I did it. Of course it threw code P1516 reduced engine power and ran like crap. Got the codes cleared and it runs good but lacks power. When I fisrt got it, it would light the tires all the way through 1st and into 2nd in competive mode now it will only spin the tires for 5 seconds then take off. Does the fuel trim being reset help in my case?

[E.T.]

Originally Posted by ICEMAN169

I am new to Camaro5 and don't know how to start a thread. I saw what you said here about pulling the fuse on the ECM for 5 minutes affecting the long term fuel trims. Here is my problem: Went to the dragstrip to see what my L99 would run stock and some butthead at the track told me to run with no air filter to get more power, so like a dumdass I did it. Of course it threw code P1516 reduced engine power and ran like crap. Got the codes cleared and it runs good but lacks power. When I fisrt got it, it would light the tires all the way through 1st and into 2nd in competive mode now it will only spin the tires for 5 seconds then take off. Does the fuel trim being reset help in my case?

You could try the fuse pull and maybe disconnecting the battery. I'd be worried about all the stuff that could've possibly gotten sucked into the engine when the filter was off.

[GQ4Life]

Originally Posted by ICEMAN169

I am new to Camaro5 and don't know how to start a thread. I saw what you said here about pulling the fuse on the ECM for 5 minutes affecting the long term fuel trims. Here is my problem: Went to the dragstrip to see what my L99 would run stock and some butthead at the track told me to run with no air filter to get more power, so like a dumdass I did it. Of course it threw code P1516 reduced engine power and ran like crap. Got the codes cleared and it runs good but lacks power. When I fisrt got it, it would light the tires all the way through 1st and into 2nd in competive mode now it will only spin the tires for 5 seconds then take off. Does the fuel trim being reset help in my case?

Outside temp & tire temp play a big role in tires spinning or hooking..

Chances are one run no filter ur fine..

[GQ4Life]

Originally Posted by Camarojt

Exactly, i TOTALLY agree with Rhino!! dyno #'s are only used to tune!! A high dyno number won't always mean your car is fast! If your out to beat another persons dyno number then your playing the wrong game. Not to mention you have different dynos that will show different results!

It's ALL ABOUT TRACK RESULTS!!

Even those have diferent results at different weather & elevation..
but trap speed will show ur hp (power-to-weight).

[Pro Stock John]

Where does the average bolt-on L99 (no cam, heads, no power adder) peak, ~5900?

I did 315rwhp stock, and 368rwhp LTs, Cats, UDP, PTB, Tune, CAI.

[E.T.]

Originally Posted by Pro Stock John

Where does the average bolt-on L99 (no cam, heads, no power adder) peak, ~5900?

I did 315rwhp stock, and 368rwhp LTs, Cats, UDP, PTB, Tune, CAI.

5900 or so sounds about right for HP. Going by my graph, mine was at about 5800.

[luvmy5thgen]

Here is my Dyno sheet....

Kooks LT's, Borla catBack, CAI .....

Is it normal ?

Thanks

[GQ4Life]

Originally Posted by luvmy5thgen

Here is my Dyno sheet....

Kooks LT's, Borla catBack, CAI .....

Is it normal ?

Thanks

seems about right to me

[luvmy5thgen]

GQ4LIFE .... thanks... its busted off a 8.21 in the 8th ...

[GQ4Life]

Originally Posted by luvmy5thgen

GQ4LIFE .... thanks... its busted off a 8.21 in the 8th ...

nice.. what was the trap speed?

[luvmy5thgen]

86 mph..... it picked up .60 over stock .....

[GQ4Life]

Originally Posted by luvmy5thgen

86 mph..... it picked up .60 over stock .....

cool.. and only on 5psi damn

[luvmy5thgen]

yep.... I am trying to decide what my next Mod will be, do you have any suggestions??

[GQ4Life]

Originally Posted by luvmy5thgen

yep.... I am trying to decide what my next Mod will be, do you have any suggestions??

Raise the boost definitely
then a cam