Painfully low numbers......come take a look
#1
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Painfully low numbers......come take a look
I recently had my car dyno'd and the results have left me depressed! Dyno graphs show 232 rwhp//261 rwtq with the AFR down in the 10's Car is a stock 99 a4 z28 and this was done on a superflow dyno. You can see the car is running to rich, but even if that was corrected it doesn't look like it would put me where a stock a4 should be. Can anyone here give me an idea of what steps I should take to see if anythings wrong with the car. If anyone here lives in my area I'd appreciate a reference to a good ls1 mechanic.
Thanks in advance
http://img.photobucket.com/albums/v4...dynoresize.jpg
http://img.photobucket.com/albums/v4...hdynosheet.jpg
Thanks in advance
http://img.photobucket.com/albums/v4...dynoresize.jpg
http://img.photobucket.com/albums/v4...hdynosheet.jpg
#6
yeah change the spark plugs and wires , get it tuned and see the cats may be clogged (might need to remove them) tune the afr to 13 ,if not then there is something wrong.
i have tuned a m6 vette 2002 that made 260 hp , the guy alomst cried , told him to remove the cats , and change spark plugs with wires (cuz there were many misfires) tuned it removed the mesh and he got 347hp with nothing being changed.
i have tuned a m6 vette 2002 that made 260 hp , the guy alomst cried , told him to remove the cats , and change spark plugs with wires (cuz there were many misfires) tuned it removed the mesh and he got 347hp with nothing being changed.
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#11
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Originally Posted by GTO_Scott
If the car feels like it has the power it should for a 99 Z28 on the street, maybe you didn't dyno in 3rd gear or there was a problem with the dyno.
Originally Posted by SAM98WS6
how about some more info? miles? mods? etc?
Thanks to everyone who has given some positive input (you know who you are). I'll respond with any other info you want about the car. I'll be getting the car checked out real soon, but until then Im stuck driving an LS1/2
#12
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I just had mine dynoed and the guy at the shop recomended 3rd gear pulls, this produced dismall #'s as well. I asked to make some pulls in 2nd and this produced much better #'s,(3rd-311,2nd-328) I know this may not get you where you want to be but it's worth a try next time you dyno.
#14
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Do the basics then...plugs (NGK TR5 or TR55IX if it was mine), wires, and fuel filter. Run a bottle of RedLine fuel injection cleaner through. See if A/F comes up to 12-13:1.. I think you are 40-50hp low. I would also suspect valvetrain if it doesnt pick up. Maybe a broken rocker or bent pushrod. Valvecovers are easy to pull and inspect.
Dyno should be SAE corrected in 3rd gear.
Dyno should be SAE corrected in 3rd gear.
#15
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1/4 mile et/mph will show you true hp numbers, make sure to note temp, absolute pressure, track elevation, and humidty at time of run (should be on slip) so you know what density altitude is. You'll get much different 1/4 numbers running on a cold day at sea level versus a hot day at 5,800 feet.
#18
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Originally Posted by Slowhawk
Looks like it is not firing on all 8 cylinder's. It can give you a flat curve like that too.Do a good tuneup with plugs/wires and clean the mass air meter.Then give it another try.
#20
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Originally Posted by lilbuddy1587
Real cute *******, hes looking for advice. Not a kick in the teeth. Take that garbage elsewhere
ok "lilbuddy1957"....go get some **** or something so you can release your stress. Some peeps take jokes too seriously.