It appears it got wicked lean too.

Yes it did, but keep in mind that the zoom in on the chart represents just a little over 1 second. That said, it was still a brutal hit on the internals for sure.

And me... :D Can't believe I forgot about that until you brought it up.

That is what I was concerned about. Lean leads to detonation which is very hard on cast pistons. Melted pistons, cracked wrist pin bosses, and broken ring lands are common indicators.

Pappy

Edit: Lance, is your ECU's rev limiter ignition or fuel based? If it is fuel based (cuts the fuel), some builders recommend adding an MSD spark rev limiter set just below the ECU limit to avoid a lean condition when the engine is on the limiter.

Pappy, the ECU is set to pull spark at 6200 and when it hits 6400 it pulls spark and fuel.

That should be about perfect.

Pappy

It has now been 48 days since I hurt the engine in Barney taking it off the road.

I typically try to not take it off the road for longer than 3 weeks at any one time. Careful planning and working fast helps me get the car back on the road ready to enjoy quickly. The EFI swap took about 7 weeks which was longer than normal, but it was a HUGE job.

I have to say, it is really starting to bug me that I haven't even decided on a path to repair yet, much less actually started buying parts and getting things done. This will be the longest this car has been down since I first restored the underside of it back in 2008. I said there would be no hurry as race season was basically done for me anyway, then this whole Covid-19 deal happened...but I'm ready to get it moving forward soon I hope.

I've met a local machinist that is working on some pricing for me. Soon then after I'll be making some final decision on which path to take.

Meanwhile...I'll keep working on the Jeep.

Stay safe everyone...

Progress?

https://photos.smugmug.com/photos/i-...5xC9tX4-XL.jpg

Lance, that’s not an LS engine. You grabbed the wrong stuff! 😜

What?!?! :D

Big beautiful pistons that have been ordered...

https://www.jepistons.com/media/cust...170817-BAC.png

https://www.jepistons.com/media/cust...817-SID-01.png

https://www.jepistons.com/pistons-130974

With this ring set...

https://www.cnc-motorsports.com/je-p...08-4010-5.html

Which will be hung on these rods...

https://www.cnc-motorsports.com/medi.../scathbeam.jpg

Scat H-beam connecting rods are the strongest Scat connecting rods available by Scat. These Scat H-beam connecting rods are perfect for supercharged and nitrous applications. These rods incorporate a special doweled cap for specific cap-to-rod alignment and are profiled with extra clearance for stroker applications. Forged 4340 material with ARP 7/16 8740 rod bolts make them very strong and affordable. H Beam rods with ARP 8740 Bolts are rated to 750 horsepower on small blocks and 850 on big blocks.

https://www.cnc-motorsports.com/scat...ting-rods.html

The new rod length and comp height on the new pistons will put the top of the piston at the same height as the OE pistons. The OE piston had a 18 cc dish and the new piston has a 14 cc dish so that along with maybe a touch of decking and cleanup on the heads might make for just a bump in compression ratio but not a big deal. Bottom end should be safe to 7,000 RPM, it'll be interesting to see how high the top end can go now.

The rods and rings are on their way to me already, the pistons have to be special cut because of a bore size change, JE said 3-4 weeks, CNC said 5 weeks... We'll see. Block is disassembled ready to clean. Builder won't start machine work on block until pistons are in hand to be sure it gets cut perfectly. He can get started freshening the heads up though.

Glad to have this decision making part out of the way, now just have to find the money to pay for it all and wait in parts jail for a bit.