Jeremy_30th

my question is why is my trend so choppy? everyone I have ever seen is smooth and also I'm not sure how to post it so if possible can I email it to someone ? thanks alot

Like My Taillights?

without seeing it, its tough, but a choppy graph is usually a sign of ignition issues.

Jeremy_30th

I emailed it to you please look at it ..thanks

Jeremy_30th

also I should add the place that did the work said it was from vibration ! I still have the 2.73 gear in there and the car topped off @ 177 MPH

texasTA

First off, I don't believe vibration has anything to do with dyno numbers. I would suspect ignition problems also. I know my little brother's heads/cam full exhaust 96 Z28 got a little choppy way up top, but it was from getting lean. I would look into the spark side of the motor.

Jeremy_30th

Yeah same here its mostly up on top end.. and @ wot blast the a/f drops to about 12.5 or 13.0 which i agree is getting on the lean side. i recently bought autotap and its 14 7 1 all the time untill i stomp it then it get down as far as high 11 a/f

Jeremy_30th

you guys are great any comments or suggestion on the graph i emailed are still welcome..and now that i look at the dyno results it makes sence when it starts getting choppy the a/f ration starts dropping at the same time so it appears it is a lean condition.. any suggestions to correct ? fuel pump ect.. has a new filter

texasTA

My little brothers car is on the stock fuel pump and injectors. We are about to swap to 30lb SVO injectors and a new Racetronix 255lph fuel pump. This should easily solve his fuel problems. We are also going to install a igntion box and a new coil. Hope this helps.