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some investigation today- Tops of pistons look fine, as viewed from the plug hole with a flashlight. plugs 1 & 3 look good, 2 & 4 have not been firing. I am running batch fire ignition, Dwell set @ 3.5ms.. maybe the coils took a dump?
This is the same condition I experienced a year ago, when I decided to swap turbos. I had chalked it up to the 40% leakdown, apparently maybe not. I guess Ill run a test in TS to check spark output, but that only narrows it down to what I already know, I think. wiring, coils..time will tell.
EDIT: wire harness to coils checks out good.
Last edited by ryansmoneypit; Nov 1, 2017 at 08:54 PM.
Found that on the oem harness plug to the coils, one of them had been severed, but still covered by shrink tube. So, intermittent power to a coil / pair. The good news is that in my quest to find this problem, I converted to full sequential ignition. I guess I should also be thankful that these things are popping up at home, not at the track.
on a side note, I also noticed that I have a very noisy signal for battery voltage. I am grounded out on the front of the engine with all of the other grounds.
Well after the V8R crooked engine debacle, she is finally out strutting around. Everyone should at some point, get to drive an EFR miata on 20psi. It's just amazing. New SuperMiata race alignment is fantastic, so much fun to drive now. Sooooo, who want's to buy the engine/turbo package?
To fund K swap. If enough interest is shown, its all up for sale.
To be completely honest, this thing is too fast for the street for the state of Virginia. It has to be driven with street bike mentality. I cant drive it after 1 beer. Had my wife drive me home in it last week (cause i had 3 beers) and my town looks like a commercial runway now. 100 foot black stripes at every intersection and gear change..She thought it was fun, i was looking out the back window the whole time for cops.
To fund K swap. If enough interest is shown, its all up for sale.
To be completely honest, this thing is too fast for the street for the state of Virginia. It has to be driven with street bike mentality. I cant drive it after 1 beer. Had my wife drive me home in it last week (cause i had 3 beers) and my town looks like a commercial runway now. 100 foot black stripes at every intersection and gear change..She thought it was fun, i was looking out the back window the whole time for cops.
Sounds like she should take you out for 3 beers more often!
Three years in the making. I went ot VIR monday for the debut of Ryansmoeypit miata. I turned down the boost to wastegate pressure (about 13-14psi) it was fast and none of the 911's could ditch me. with the 6 speed and 4.1 rear gears it was good for 130 mph @7k rpm. i was able to get to 130 in less than 1,000 feet heading down the straights, so that left me with about 3,800 feet in the straight to twiddle my thumbs.
Long story short, the engine melted down at about lap 50. Exiting turn 12 down the straight, at exactly 130 mph, there was a mild "pop" noise and the cab instantly filled with smoke. I lost piston #1 to unknown cause, at this time. safe tune, low boost, plugs looked perfect. Maybe it was the excessive life at 6-7k rpm.
IMO a miata just doesnt need 300 hp to run track. I rarely used more than 1/2 throttle. 5th and 6th gear at 4-7k rpm was just too much power. No aerodynamic adders and up the esses I was about 100-110 mph.
So everyone get your money together, cause I got some real nice parts that will be for sale asap.
Last edited by ryansmoneypit; Oct 15, 2019 at 10:49 AM.
Was this first event, using all this amazing work done? Sorry to hear about engine. One of my clients tapped a wall on rear of S2000 at COTA Sunday; these track days can be brutal on wallet.
Yep, 3 years in the making and this was the first event. 2 years of street driving, mostly abusive, 6 auto x events and no problems. 50 laps on track and dead.
Phase 1 of my wind tunnel. This is for real. Twin 500c.i. V8 engines turning 80" carbon props, all blowing through a wall of flow straighteners. Will make 100 mph sustained wind.
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