The build was done 3 weeks ago, the engine is broken in and street tuned. Still need to get it to the dyno for fine tuning and to set up a race gas-only map. The car is much faster than before. Here's a shitty cell phone video I made driving the car the other night.

Makes me feel like my rotary is super reliable. :rofl:

Nice build though. I'm sure that thing is ridiculously fast...

Nice project man, thanks for posting it.

Yeah I've been reminded that I could have built a really nice 20B with what I've spent on these 2 engines. The LSx engines are the same as any other performance engine and when they break, they break bad.

Thanks! I haven't dyno'd it with the stroked LS3 but I'd guess its in the 450s. Its dead even with my friend's boosted C5 Z06 that makes 703 at the wheels. I've pulled a lot of timing because of the comp ratio to be safe. It'll get turned back up on the dyno. I'm hoping for 500 on race gas with the shitty headers I've got.

Thanks for checking it out! :)

That's why I love tuned cars. Straight line, his $90,000 Z06 is comparable to the $20,000 (or whatever) build and it's not like Z06s are even that nice inside. Turns, I'll take a Miata any day. 3200lbs vs. 2500lbs...

That's a nice LSX project you got here Glenn. ;)

Nice build man! I cant imagine how fast a miata feels with a LSx. My FC with a cammed 2004 LS1 made 425rwhp & 417 rwtrq(corrected) and it is a fucking rocket.

So did you ever figure out what causd your #7 rod failure on your 2nd motor? Those were aftermarket rods and pistons with that stroker kit right?

Basically it ended up that quench was too tight, and there were a few times where I was in the top of 3rd and ended up in 2nd instead of 4th...from what I could tell I never went higher than 7K but who knows. I did this quite a few times trying to get the shifter figured out. :icon_no2: When it let go, it had been months since it happened. It's the only explanation my machinist could come up with. Rods were Scat I-Beams and pistons were Mahle. I'm running K1 H-Beams and Mahles in the latest build.

Aghhhh yes, I have read that mis-shifts are the #1 death of LSx's besides the dreaded oil starvation from the stock F-body pan on track event days.
You are lucky you got away with it a couple of times.

I feel you on the shifter....the damn shift gates on the T-56 are DAMN close....too close for comfort if you are required to shift/downshift with urgency and percision:o

You ever install an accusump or did you mod the pan?

Anyway, good job man...I wish I was near you. I would love a ride in that thing. :sifone:

I never went with a Accusump and I'm running a modified F-Body pan. Just kept it overfilled a tad. My crappy welding and the high zinc content of the stock pan finally bit me in the ass, the pan started leaking bad after the recent build. I grinded down the beads and put some JB Weld on the pan to try to fix the slight seepage I was getting before. So I ordered up a custom pan from V8 Roadsters that has trap doors for the pickup so there's no starvation...also its 7 quarts, it uses a remote filter. Its gonna be here Tuesday, I'll post some picture up. :)

You = badass.
Damn nice Miata.

Sweet! No worries anymore with lubrication:willy_nilly::coolgleamA:

Just with the crank hitting the pan. :lol:

wow, you wreck v8's like most people destroy rotaries.. LOL

Ahhhhhhh, I remember this build from post 29 on... I even see one of my welds ;)

You guys have no idea how quick this car is.... it rearranged my internal organs on acceleration. The torque just doesn't stop.... it's odd.... it like not a rotary :rofl:

Glad you're loving the dash Glenn.... sorry you had to see it ;)