OMFG!! got dynoed with horrible results
05-03-2008, 11:32 PM
#1
OMFG!! got dynoed with horrible results
I had the wife take my car to the dyno yesterday and I just got the results back. Pulls we're made on Dyno Dynamics Dynamometer in 3rd gear. Humidity and temp unsure i'm in iraq. It's a load bearing system so the numbers were supposed to be a little low or so I have been told. The car is bone stock except for the K&n drop in filter. I am very upset with the numbers 139.1 HP is freaking horrible. Is there something wrong with my car??
05-04-2008, 12:36 AM
#5
It could be the dyno or the fact they didn't pull the room fuse or turn off the DSC and TC.
Could have calculated the load wrong or used the wrong weight of the car.
Or dyno is not calibrated correctly for any car.
Could have calculated the load wrong or used the wrong weight of the car.
Or dyno is not calibrated correctly for any car.
Last edited by Razz1; 05-04-2008 at 12:41 AM.
05-04-2008, 12:54 AM
#6
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05-04-2008, 03:05 AM
#7
So will pulling the room fuse and disabling DSC/TCS make that much differance? What is this room fuse never heard of it and what gear should i be in 5th? This is very frustrating. I have $7000 worth of parts sitting at home now I'm afraid the motor is going south so i don't want to put them on if the motor is going out, but if it is the coils and plugs will i need to drive very easy untill the computer rests to a new trim. I'm not convinced it's the coils because even with the drops in the upper RPMs it's still rather smooth not jerky. Maybe it's the cat???
Last edited by Mr.&Mrs.Magic; 05-04-2008 at 07:26 AM. Reason: add on
05-04-2008, 08:33 AM
#8
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i second clogged cat. get a hi flow and see what happens. reset the ecu after getting on the high flow. it could also be a loose connection on your cloil / plug .. never know... even with a room fuse or whatever .. your not looking at that much of a difference. i dyno'd my car with the room fuse in at 190 ish then it only went up a few with it out.
05-05-2008, 10:17 AM
#9
Administrator
MAgic-
Your car has an issue. it is not the dyno. Those are good plots showing a problem. You have got one of 3 issues and maybe all of them. Bad Coils , Plugged Catalytic Converter and / or you are having Carbon build up issues which are restricting the air flow into the engine and possibly causing seal issues that are lowering your compression.
Your car has an issue. it is not the dyno. Those are good plots showing a problem. You have got one of 3 issues and maybe all of them. Bad Coils , Plugged Catalytic Converter and / or you are having Carbon build up issues which are restricting the air flow into the engine and possibly causing seal issues that are lowering your compression.
05-05-2008, 01:23 PM
#10
Asleep at the wheel
Hi
My car also had this low power problem. Still does in a way. What i've done so far is this.
Replaced coils.
Replaced plugs.
Replaced plug/coil wires.
Deleted cat.
Car pulls much better up to rev limmiter. Another problem I have is that the car cuts out at revs above 5500rpm after a 40min drive at revs above 4500 rpm on freeway. depress the clutch..bring to idle and release clutch and car drives again.
Car doesn't die...just wants to idle for 2 sec. then go again and cuts out above 5500 rpm.
What i suspect is the fuel pump. When its hot it makes some funny noise at idle. Can hear it at the back seat. Seeing how your graph look, I gues that the car goes rich becuase of fuel pressure. Have realised that my fuel consumption goes up real quick (can see needle drop a bit) when this cutting out funkiness starts. So i will replace the pump and see what happens then.
Cheers
My car also had this low power problem. Still does in a way. What i've done so far is this.
Replaced coils.
Replaced plugs.
Replaced plug/coil wires.
Deleted cat.
Car pulls much better up to rev limmiter. Another problem I have is that the car cuts out at revs above 5500rpm after a 40min drive at revs above 4500 rpm on freeway. depress the clutch..bring to idle and release clutch and car drives again.
Car doesn't die...just wants to idle for 2 sec. then go again and cuts out above 5500 rpm. What i suspect is the fuel pump. When its hot it makes some funny noise at idle. Can hear it at the back seat. Seeing how your graph look, I gues that the car goes rich becuase of fuel pressure. Have realised that my fuel consumption goes up real quick (can see needle drop a bit) when this cutting out funkiness starts. So i will replace the pump and see what happens then.Cheers
05-05-2008, 01:30 PM
#11
So i know that completly gutting the cat will throw a code but can the COBB AP turn the CEL off. I dont want any annoying lights in the dash. Also this will just be a temp trial to see if i regain any ponies. If it does give me back the HP I'll look in getting a high flow cat. thanks for the help thus far guys, I also have the mazsport ignition sitting at the house no worries there.
Last edited by Mr.&Mrs.Magic; 05-05-2008 at 04:17 PM. Reason: removal of seafoam
05-05-2008, 05:33 PM
#12
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So i know that completly gutting the cat will throw a code but can the COBB AP turn the CEL off. I dont want any annoying lights in the dash. Also this will just be a temp trial to see if i regain any ponies. If it does give me back the HP I'll look in getting a high flow cat. thanks for the help thus far guys, I also have the mazsport ignition sitting at the house no worries there.
05-05-2008, 07:33 PM
#13
youre numbers are starting out really low---so low that a partially plug cat would not really affect that much. ditto for the plugs and coils---at low rpm they usually are not that bad. also youre torque and hp crosses at a higher rpm than it should.
To problem solve start with all that has been mentioned---check cat, replace plugs, coils and wires, reset computer and do the pedal dance. do a de carboning---- then redyno.
olddragger
To problem solve start with all that has been mentioned---check cat, replace plugs, coils and wires, reset computer and do the pedal dance. do a de carboning---- then redyno.
olddragger
05-05-2008, 09:03 PM
#14
good deal guys i'm out of town right now so i will replace all that is currently an issue and see what happens. should be able to get back on the dyno i a mth and i'll repost results. also i'll address each seperate issue 1 at a time reset the ecu datalog and post the findings with each upgrade. Hopefully this will help diagnose other peoples problems in the future. Good idea or do you think useless?
01-25-2009, 11:08 PM
#17
It's a Cavalier
youre numbers are starting out really low---so low that a partially plug cat would not really affect that much. ditto for the plugs and coils---at low rpm they usually are not that bad. also youre torque and hp crosses at a higher rpm than it should.
To problem solve start with all that has been mentioned---check cat, replace plugs, coils and wires, reset computer and do the pedal dance. do a de carboning---- then redyno.
olddragger
To problem solve start with all that has been mentioned---check cat, replace plugs, coils and wires, reset computer and do the pedal dance. do a de carboning---- then redyno.
olddragger
The scales on that dyno graph are different for tq and hp. If the scales were the same, they would cross at the correct point.
