u/juggernautjoee

It's an early 74 260z

I weigh ~205lbs

Full tank of gas, and all other fluids obviously

240z bumpers

Full carpet, interior, and full butyl matted (except for doors)

No compressor, blower fan, or any HVAC components in dash

This is an L28et swap, no emissions stuff, mostly everything stripped out of the engine bay that doesn't need to be there

Full painless wiring harness

Aluminum radiator

Braille 15lb battery

No spare tire

2 Acura RSX seats (I think the still have the side airbag modules in them, woops)

BC racing coilovers

4runner front brakes, Maxima rears

TL70 6 speed swap

16in konig wheels w/ 250 55 tires

3in aluminized steel exhaust w/2 resonators only

I have probably another 10lbs in random tools, my laptop, etc..

I've got an L28et MS3x, COP, etc.. Been on this ecu for a couple years now. I've found TDC with a piston stop and already knew my balancer was a few degrees out of whack. I've always been on the lookout for an aftermarket solid balancer (used) and scored one recently.

I set my old balancer to exactly 0 degrees before I removed it. I made sure the crank didn't move at all as I took it off and put this new one on.

https://preview.redd.it/did4839fn7zg1.jpg?width=3072&format=pjpg&auto=webp&s=ed01cc13fc554859ebab0a35fbe120cf5e80f1dd

That top mark that is painted white on the balancer is 0 degrees. You can see that it's basically 15 degrees off. This was before I torqued down the bolt, so again I made sure that nothing moved.

Here's the old balancer. You can see the rubber is definitely cracked.

https://preview.redd.it/wai07yn0o7zg1.jpg?width=3072&format=pjpg&auto=webp&s=4e7a8d04194907521aeb35344da869c2e9cbd6ed

I emailed Pro Products, who makes this new damper to verify that the top mark is 0 degrees. They verified that is correct and sent me this diagram. My balancer doesn't have 2 sets of marks on it, as it's an older model. But you can get the jist of where 0 degrees should be in relation to the key slot:

https://preview.redd.it/te1xtptho7zg1.png?width=961&format=png&auto=webp&s=c012af78af7339faf302aaa289a64ae0d652a675

You can see from this below picture how the mark drifted counter clockwise several degrees

https://preview.redd.it/0kxlvjeqo7zg1.jpg?width=4080&format=pjpg&auto=webp&s=2bcbd3766686b7dc525ea7930262f9067d97ed60

Another thing. I've always had an issue with sync loss events if I went above 28-29 deg at light cruise. I also tried sneaking up on 30 deg at idle just to see what it would do, and it would sync loss every few seconds. But other than that, the car ran great.

If anyone else has megasquirt and is having weird sync loss issues, make sure to check your balancer as it may have spun.

Now I get reset my tooth angle and mess with all my timing tables all over again. But at least I'll know that it's correct

I weighed my 260z today