Oh well, at least nothing broke.

Yea thats always an upside,although I did manage my best 60ft of 2.02

Yep, better launch. Good deal.

Another good day/bad day deal at the drag strip, wind speed/direction seems to have a big effect on my ET and MPH, at least I know its not a problem with the car because a couple of buddies are losing 4-5mph and at couple of tenths too.

Cut my first 1.9 60ft though

Left lane for me
https://cimg5.ibsrv.net/gimg/www.mia...42b2b07497.png

My car was never the same after I trapped 110. That being said, headwind does affect our tiny cars a ton, more than the v8 boys. Almost always a good headwind at my local track.
Congrats on getting under 2 second 60'.

Impressive. So close to 12's.
What is your launch method?
What does boost profile look like?

I'm going to run mine at the strip this winter on the vlad mega tune to see what I can trap, but I'm running a 1.6. Vald you think I can break 110mph? This has me curious and excited, and half hard.

Glad to see more td04 13ts around as there was only 2 others (that I could find on forums) besides dnmakison and I when I started my build.

I think Karter74 is going to install his old set-up in a new car.

They are more popular on MX5's in Europe and Australia, apparently.

I doubt it, but of course it doesn't hurt to have goals. I was honestly surprised to see 111mph, and think it's going to be hard to even repeat, much less beat, even with OP's 1.8 setup.

Just about every "budget" built turbo MX5/Miata here uses a TD04. Manifolds are more common and turbos are cheap used from WRXs

Boost targets look like this
https://cimg9.ibsrv.net/gimg/www.mia...65cfdc2b23.png

This is the slip from my 12.9 earlier in the year. Notice the 14mph tail wind compared to this weekends 10mph headwind

https://cimg5.ibsrv.net/gimg/www.mia...393ce87531.png

I'm back at the dyno from my OP in November too.

Car is on Yokohoma AD08R which I run at 16psi at the strip. On board footage below



Edit: a tenth faster upto the 1/8 mile this weekend but a tenth slower by the 1/4 than my 12.9 pass

Think I've possibly figured out why I haven't been able make another pass in the 12s. I've noticed I've got a slightly seized rear caliper.

But is that sticky caliper enough for me to lose 3 tenths (0.15s faster by at the 330ft, 0.06s faster at the 1/8 but 0.15s slower at the 1/4)

don't think so. if it was slowing you down it would do it always

I'm completely stumped then.

More power, AFRs haven't moved, boost holds solid, shifting at the same RPM. I just don't seem to carry the time for the second half of the track

Unless you catch another tailwind...

Well this may go someway towards explaining my "slow" 1/4 miles now. Was expecting at least 280hp on this particular dyno

Attachment 230532

Not yet looked into the root cause yet but I'm suspecting head gasket as it was cruising between 5-10 Celsius hotter than normal. Wideband was going nuts too, very bouncy readings quite frequently flicking from 13:0 to 17:0 with no lean/rich stumbles you'd expect with it doing that.

Whipple SC mustang was a bit of a shoe once they managed to get it to run without trying to blow the tyres off

You probably bent a rod or two

​​​​​I'm expecting to find a couple. Going to do a compression test and crudely measure rod lengths through the spark plug holes in the week.

Couldnt hear any usual noises through my Det cans on the dyno though

det is one thing. bending them from sheer cyl pressure is another, and won't show any signs of det, probably cause there isn't any. you simply might be exceeding their capacity

been there, done that, got the bent rods to show for it :)

Logic was you'd hear something due to the odd side loading on the pistons or some sort of imbalance to the difference in interia

Can almost hear them bend when comparing the 1st and 2nd dyno pulls, should have had them overlaid really
Attachment 230531