Thanks for the info. I ordered them a week or so ago but it's good to hear confirmation of that, I won't be running tons of power (or likely hardly any power) for the time being.
You can always post more pics BTW :) |
new pics are coming as soon as I start rebuilding my engine :)
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engine rebuild has begun! some new pics
http://www.miata.fi/kuvat/2015-02-17-18.53.jpg http://www.miata.fi/kuvat/2015-02-17-19.33.jpg http://www.miata.fi/kuvat/2015-02-17-19.32.jpg Pistons look clean. Remember this engine had run with E85 http://www.miata.fi/kuvat/2015-02-18-20.21.jpg wait...wut? http://www.miata.fi/kuvat/m2015-02-18-20.22.jpg That explains all the noise :rofl: My supermiata damper got loose, started to vibrate and looks like it crack the crank in half :fael: Am I first? |
That's the first Miata crank I've seen broken through the #1 crank throw.
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you're certainly in the first handful lol
that's some impressive carnage, congrats for making MAN torque |
Originally Posted by 18psi
(Post 1207912)
you're certainly in the first handful lol
that's some impressive carnage, congrats for making MAN torque |
Don't think I've ever seen a crank failure, before.
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1 Attachment(s)
Originally Posted by Ryan_G
(Post 1207958)
Like he said, the damper slipping off and wobbling like crazy fucked thay crank up.
https://www.miataturbo.net/attachmen...ine=1424711120 Also I just bought VVT head. I was thinking something like supertech springs & SUB’s. Make it “8000rpm proof” |
Super keen to see how you go with the VVT head.
Were the rods and pistons salvageable? |
http://www.miata.fi/kuvat/2015-03-01-18.59.jpg
Supertech rods and pistons were OK http://www.miata.fi/kuvat/s2015-03-01-18.58.jpg http://www.miata.fi/kuvat/2a015-03-01-18.59.jpg Only damage was that ~0.1mm notch in #1 main bearing cap. I don't think that matter http://www.miata.fi/kuvat/bb2015-03-01-18.58.jpg So; -new crank -new bearings -new m-tuned oil pump -ARP main bearing bolts. (maybe) ...and balance everything |
2 Attachment(s)
Found an old crank back of my garage
http://www.miata.fi/kuvat/2015-03-08-14.52.jpg It look OK apart from one journal which I have to polish and maybe use bigger bearing with that Here's what I wish to achieve with the build VVT head: https://www.miataturbo.net/attachmen...ine=1426853084 A much wider powerband. Make it spool ~300rpm quicker with the VVT cam. Lower midrange torque by retard timing from 21 to 18deg, this to make 6speed's last longer. And then as the torque start to decline just add boost to compensate and keep that flat torque line as long as possible with these stock cams. mMMm....3500-8000rpm torque curve :drool: |
Dont retard that midrange timing, just run less boost there.
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Originally Posted by Leafy
(Post 1216899)
Dont retard that midrange timing, just run less boost there.
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ARP would be good insurance to keep the caps tight. New crank looks like it needs undersized bearings. Good luck.
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2 Attachment(s)
Originally Posted by hrk
(Post 1216931)
ARP would be good insurance to keep the caps tight. New crank looks like it needs undersized bearings. Good luck.
https://www.miataturbo.net/attachmen...ine=1426859469 Also there's M-Tuned billet oil pump waiting :party: |
http://www.miata.fi/kuvat/2015-04-21-17.35.jpg
painted http://www.miata.fi/kuvat/2015-05-05-18.54.59.jpg I hope this will stop my oilpressure dropping while braking |
Cool DIY baffle, I hope it works!
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2 Attachment(s)
I'd go even further with the baffle- all the way around- like prod racers:
https://www.miataturbo.net/attachmen...ine=1430924708 |
I think about it but oil can escape in only direction there. Plus I haven’t notice any pressure drops on cornering, only when I braking:
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Everyone has their tricks. I add one extra quart to the pan for track duty. I know the oil needs to drain by gravity out of the head and that most of the draining happens at the rear of the engine. I worry with high revving that it is pumping a lot of oil up to the top of the engine that doesn't have much time to get back down to the pan. I also like to think it reduces the propensity for the oil to heat up quickly because of the added volume.
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