LS1 Conversion in to a 2nd Gen Commodore TACH ISSUES!

[CYCO-VS]

Hi Guys,

not sure if this is in the correct thread?

i have a question i have done a ls1 conversion in to a vp calais car was a ex 5ltr

Now my tachometer is reading incorrect compared to my odb2 via my phone i do know there is a value that needs to be changed in the tune when your using hptuners or efilive ect .
but is there any other way this can be fixed like doing modifications to the tacho cluster it self ?

[delcowizzid]

You need to convert the tach to 4 cylinder as ls1 outputs the same amount of pulses as a 4 cylinder you will be reading half the rpm

[OZ38]

I just got put on to these two bits.
Maybe one of them will help you out too.

https://www.justraceparts.com.au/jrp-ta ... al-adapter

https://www.justraceparts.com.au/jrp-un ... ch-adapter