I got 1 run on the dyno today and the results were 237.2 Max power and 267.7 Max torque! Is this normal with CAI, Jet Hot LT's, no cat, flowmaster, and TB Bypass? I mean isnt a stock z28 like 280 hp? Im really down right now, i was hoping for at least 290-300 hp. Also i got a Air/Fuel gauge and im running lean and rich at the same time, is this normal? The gauge goes crazy when i step on the gas and when i let go of the gas it falls down all the way. I think there is something seriously wrong with my car what do you think?


Dyno Sheet

 

Definitely not right.
Any numbers on fuel pressure and timing???
Need some numbers from the ecm or even a look at the dyno can be helpful, also fuel pressure..

 

Is your car hard on gas lately? Maybe your O2s are shot. Maybe the opti is dying or the coil is shot.

 

arent lt1 rated at 275 at the flywheel and more like 240 sumthin at the wheels?

 

I dynoed at 256 HP and 297.3 TQ stock.. but I am 10 more hp then you stock but yeah sounds like you ahve a little problem. when was your last tune up?

 

O2's wouldn't matter, they're ignored at WOT. Post the dyno graph if you can.

 

check your plug wires...

 

Thats what i figured at first but even with the few mods i've done i should be doing me than 237!

I'll get the dyno sheet online tonight, How can i find out my fuel presure and timing?

 

the last tune up was about 2 yrs ago

 

Both numbers are down 20 from stock.

LT1's dyno about 255/290

Look at it this way, at least you found out that there is a problem so that you can fix it and max out the potential of your Z28.

Dan

 

yeah that was one of my reasons behind getting the dyno done but now im just pissed that i dont know whats wrong with it

 

OK here is the dyno sheet, anyone know whats going on? Thanks


Dyno Sheet

 

I don't know, but DANG that's crazy. Seems like it would be something you could feel with those spikes. Does the car feel smooth?

Sorry.

Dan

 

I wasnt there when they put it on the dyno but the car doesnt feel smooth at all when i take off until i get to about 2,500-3,000 rpm then its kinda smooth.

 

you said you only did one run, right? well maybe your car wasnt warm yet. when i went to the dyno my first pull was 230rwhp my second was 265 and my last pull was 280.