Dynojet can't clearly read my car RPM...

[NeniNeniBoBo]

Hopefully i'm on the right place to post and any sifu here can help me out. Just install bigger cc injectors into my car and is ready for dyno tune but problem comes out.... Its sounds weird, the dynojet can't 100% read my car RPM but others cars no problem, dynojet show my rpm jumping and fluctuate when give throttle, and sometime it langsung can't read my rpm and make my chart putus-putus.... Any problem to my car? I just change my coil not long ago(OKd), i think shouldn't be coil problem... A question here, will a bad earthing/ground cable will cause this happen?

 

[zamiex]

what engine? maybe ur cable plugs problem?... on mitsu engine its sometimes dynojet cant read rpm properly... maybe u should go use other dyno machine?

 

[NeniNeniBoBo]

what engine? maybe ur cable plugs problem?... on mitsu engine its sometimes dynojet cant read rpm properly... maybe u should go use other dyno machine?

Thanks for reply bro. My car is bnr34, rb26dett. Which cable do you suspect? Coil cable? Ground cable?
Problem is car like gtr35, gtt34, Honda all no problem, just my car....

 

[ftzone]

try a different dyno machine with self learning/calibrating RPM. (something like dastek or hyper power).
it doesn't really matter if the RPM is out a little bit on the dyno. important thing is knowing the power & torque curve is right and optimum for your engine.

 

[NeniNeniBoBo]

try a different dyno machine with self learning/calibrating RPM. (something like dastek or hyper power).
it doesn't really matter if the RPM is out a little bit on the dyno. important thing is knowing the power & torque curve is right and optimum for your engine.

Thanks bro~ will give it a try ^^

 

[vteckiller]

yup try another dyno....
:p

 

[xtremeleo]

yup try another dyno....
:p

hahaha, like a new, more accurate, dyno dynamics 4wd dyno ke jo? hahahaha..

 

[Over Boost - Motorsports]

aik, jo tukar dyno ke? :P

I feel rpm is very important to calibrate with the torque and powerband curve including air fuel ratio curve versus RPM, since all fuel and ignition adjustment is consist with RPM and other elements like intake press and tps when you wanna comes to tuning a standalone or piggyback rite?

Correct me if im wrong, still learning :P