Just curious if different crank pully sizes would make a difference in how the motor runs?

 

Ive got a 4k in me KE70 that has a larger crank pully, and also a aircon pully on it with 4 bolts holding it to the main one.

 

And the 4k ive got in the shed has a smaller crank pully and only 2 holes to mount a second pully to it.

Am wanting to know if i can use the larger crank one with the 4 bolts to hold the aircon pully on my other 4k? its for me supercharged project. i much prefer 4 bolts holding the charger pull on crank, then 2...

 

:dance:

Just swap the whole front pulley'f from motor to motor.

All it will effectively do is turn your water pump and alternator a bit quicker.

BE CAREFULL.....

 

Timing marks DO vary across K motor pullies and you might throw your timing out depending on what you do.

 

Also doing the pullies swap can really muck up fan belt selection.

 

I run a 5K stock pullie, nissan altornator, on stock water pump and took me for ever to find the right fan belt. But all I know is my length I use is 33 inches...LOL

 

So can swap yes but watch for timing marks.

AHhh, well motor is going to be checked over before it gets put in... (thanks Simon for offering lol)

 

how far outta wack can it put the timing out?

Yeah I can check it out for you. Could grab a CM at the same time?

If the pullies are different we could just re-mark a new timing mark on the pully you want to use.

does the pulley only go on in one spot on the end of the crank?

 

and thats why the timeing is marked there?

 

never even thoguht about that til now

does the pulley only go on in one spot on the end of the crank?

 

and thats why the timeing is marked there?

 

never even thoguht about that til now

 

Yes it has a key way on the crankshaft and the pulley is fastened by a bolt in the end of the crankshaft.

I will look tomorrow on the timing mark difference but just engrave a new one in it to adjust it if necessary.

 

Off top of my head think it was about 10 degrees difference makes tuning interesting first start..LOL

i run a crank pully off a 2k on my 5k motor. it revs up a little faster but i have never had any problems with the alt or waterpump doing so. from memory the 2k 1 is 112.3mm and the 4k is 143?? i thnk

12.2Cm for the 4k one in my KE70

11.2CM for other one i got