TR's 260z L28 Build Thread

[Zetsaz]

How did you end up mounting it?

[TrumpetRhapsody]

18 hours ago, Zetsaz said:

How did you end up mounting it?

Right now it's just sitting in there, since I removed the forward console mounting bracket for weight reduction lol. Eventually I plan to put that back in and solid mount the cage to it.

[TrumpetRhapsody]

Updates! I found that I was still using the opto-isolator tach input/output circuit with EDIS, as originally suggested by B&G. MSExtra now recommends using the VR circuit, so I swapped to that. I haven't noticed a huge difference, but the placebo effect has me thinking it's running a bit smoother.

 

I'm still having trouble fully eliminating my light ping above 10psi, even with timing pulled back to 15* and running 11.9 afr. I'm worried about EGTs (which I'm not monitoring) if I pull any more timing. I'm starting to wish I'd spent the time on some headwork before reassembling the longblock. Maybe I'll look into installing my methanol kit until I'm ready to take the plunge into E85, but I hate to have to do that temporarily. I just don't know what else I can troubleshoot.

 

I do have a pretty constant miss at idle that I haven't been able to track down, but I can't see how that would have anything to do with my ping.

[TrumpetRhapsody]

I haven't done a test run yet, but I'm 99% sure I found the cause of my knock "issue". When I made my custom timing indicator I didn't have a good way to verify TDC, so I just eyeballed it based on the cam marks and never circled back. I bought a proper piston stop, and lo and behold I was set at 11* over-advanced . That'll do it.

[TrumpetRhapsody]

Black Friday got me GOOD. I picked up MS3 Pro Mini, ProTunerZ 14mm fuel rail and manifold adapters, Deatschwerks 800cc injectors, Radium 10 micron stainless fuel filter, Aeromotive Stealth 340 in-tank retrofit kit, and all the bits to rebuild my soft lines with -8AN PTFE hose. E85 here I come!

 

Over the last two months I pulled my tank to clean and install the in-tank retrofit. I used 1/4" wood blocks to space down the tank for clearance, plus thin pieces of foam on the passengers side so the pump unit wasn't touching the body directly. I had to bend the fuel level sender arm to clear the giant foam baffle. I also replaced the expansion tank hoses to be E85 compatible, using 2 90* fittings to make the u-turn on the 5/8" vent.

 

 

Back of the car is done, and only had to rework one leaky hose-end! Now on to the front hoses, fuel rail and injectors. I'll tune with the 800cc injectors running 91 for awhile, then eventually rewire for MS3, add a flex fuel sensor, and start tuning for E85.

Edited February 4 by TrumpetRhapsody

[TrumpetRhapsody]

Since the last post I swapped in the 800cc injectors and ProTunerz fuel rail, but haven't gotten to re-doing the front lines yet. My idle PW is almost identical, and they seem to actually run smoother. Over time I had developed yet another exhaust leak, so I decided to have a flex coupler welded in and upgrade to a real muffler while I was at it. I'm also going to try the oblong locking exhaust nuts this time, to see if I can stop blowing out the gasket when the stock ones work loose.

 

While the manifolds were off I swapped to my soft wastegate spring, since the hard spring was pushing a minimum of 14-16 which was a bit spicy at part throttle. The new spring wasn't giving me more than 12psi at max dutycycle, so after trying the reversed wg routing and getting a minimum of 18psi, I upgraded to a 4-port MAC boost solenoid. Now I'm able to hold from 6-18psi easily, and at only 60% duty I should have room to push past 20psi once on E85. I also wrapped my downpipe, because why not.

 

Next up I need to fabricate some sort of air box and cold air feed, to stop sucking in hot engine bay air during the summer. Eventually I'll get around to wiring in MS3, new seats, roll bar. The list never ends.

Edited Saturday at 09:51 PM by TrumpetRhapsody