Early 1974 260z build

[juggernautjoee]

Literally just needed to change one setting from rising edge to falling edge and we're good.  Had to find another tooth angle after the change, but that's easy to do.  The AEM wideband was fixed by just grounding the brown wire.  

 

Drove it down the road a bit and let the auto-tune hit some target AFR's.  It's definitely running better.  I've just got it using wastegate pressure for now.  I can hear it spool and release, so the BOV and all that stuff are working fine.

 

I noticed I'm sitting at 60-65kpa at idle.  I know my Schneider stage II cam is probably the culprit.  I also need to do a hot lash of the valves, as they're a bit noisy.  Hopefully i don't have a vacuum leak'

Edited May 6, 2024 by juggernautjoee

[juggernautjoee]

Replaced quite a few things to try and track down the random shut-off problem I'm having.  New ignition switch, new internally regulated alternator from a 99 Nissan pathfinder, and removed the seat belt interlock module in the engine bay (it was already removed from the relay under the dash).  That seems to have done nothing lol.  I think I'm still getting some random sync loss issues that I need to track down.

 

But I did put some skillard door panels on, and put an Acura RSX seat in.  That took a bit of cutting and welding on the seat side, as well some cheap ebay sliders.  

[juggernautjoee]

Got a deal on a used set of 240z taillight panels.  So I sprung for some 240z taillights as well.  I really like the look of those more.  Just a few more pics.

 

 

[juggernautjoee]

Found another RSX seat.  It's not an exact match.  The stitching pattern is different b/w the seats, and the plastic trim in the headrest area is a different color.  Obviously I'm not going to fix the stitching, and I'll just paint those plastic trim pieces black and be done.

[juggernautjoee]

It's been awhile, but thought I'd update with something funny I discovered.

 

I've never really trusted the harmonic balancer and where it said 0 deg was. I tested with a piston stop and knew it was off a few degrees, but it wasn't enough for me to worry about. This thing is megasquirt tuned, so I really can just give it whatever timing it wants and be good with that. 

 

So I got lucky with someone selling an aftermarket balancer, used. It's the 90055 Pro Products PowerForce damper. 

 

I set my old balancer at 0 deg, right on the mark before I pulled it. Here is where the new balancer is showing it should be:

 

The white mark at the top on the balancer is 0 deg. It's probably close to 15 deg off lol. This is before I torqued down the bolt, so I know I didn't move anything when installing.

 

And now that I think of it, 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. I've attached pictures of my old balancer too. You can see the rubber is definitely cracked.