In the UR manual it says results won't be seen until the ECU resets in 5-7 days. Can i just disconnect the battery for 12 hours and do the same thing? DO i have to wait 5-7 days to notice HP increase or is that BS?

 

I'm wondering why you would even need to reset the ECU. I can see the ECU needing to be reset after mods that affect fuel, air, exhaust flow or timing but I can't see where the ECU would have anything to do with a change such as the crank pulley.

It's like changing your clutch out for a lightweight one, the performance gain should be immediate since all you're doing is freeing up HP to the wheels. Doesn't that make sense?

 

In the manual for the Pulley, it says :
The Maximum HP gains from the pulley/s can be expected within 5-7 days of driving, once the computer has recalibrated fully and taken advantage of the engines lighter rotational weight.


I wasn't sure if i could do it the easy way or had to wait for it. Or, if it was just a line of BS.

 

I never reset my ecu for any of my mods, including my pulley, so I would say no, dont worry about it. After I put my pulley on I leaned waaayyyy out, I know it doesnt make sense but MY car with MY mods ran way lean after I put the cp in for some reason.....

 

What did you do to correct it?

 

subscribing

 

subscribingx2

 

Reflashed my ecu. I went from high 13's a/f to very very lean over 15:1.....the dyno shop said they had never seen that happen before with a mod such as a pulley, but hey you know how our ecu's are. Now car runs great Not trying to scare you just letting you know what happened with MY Z.....

 

I'm going to Dyno after i install my mods.
That way i will know.

 

The crank pulley fits on the 35th anniversary?
Thanks for your reply..

 

yes...fits on all Z's
no need to reset the ecu...just drive as you normally would

 

Thank you very much Z1...
Grazie mille...

 

A question +/- on topic- I have a KJR lightweight crank pulley on order; it is not undersized. Are UR's non-crank pulleys, i.e. water pump and a/c undersize or OEM? If these secondary pulleys are OEM size, and just lightweight, will installing them result in additional gains? Will UR sell the secondary pulleys separately? Anyone have experience w/ this? Thanks.

 

There are no additional gains with the other pulleys. The only gains are seen from the crank pulley.

 

Thanks, DayBlueZ. I kinda figured that was the case, but wanted confirmaton from those more experienced.