127mph 1/4 mile
 

Best et and mph of the night. Soft launch, bad short track but 127mph means shes making some decent power. Especially for stock pistons

Daaaaaaaamn dude. Stock nb1 pistons? Ever been on a dyno, or any virtual dyno graphs? Curious what kinda power this thing must be making for that trap speed.

Scale at the track said 2100lbs without me in it. I didnt think it was that light

No dyno. Im thinking in the 475whp range. Plus or minus 10

It's that a typo? 127 mph is about right for 375 whp. Definitely not 475.

Oh. Well, back to the drawing board :inout:

Very impressive!
You can get 11.0-11.2 with sticky tires like that Rudnik kid.

I had slicks on. Just didnt launch hard bc i didnt wamt to break anything my first time out. 127 mph with a really good 60' is a high 10 sec pass.

My goal for the night was 130mph but its not making the power for that. I need to set up ffs

Yeah if you punch your stats into those weight + trap speed to power calculators, if you're 2300lbs with driver in the car they're all spitting out numbers of around 365whp.

First off, congrats. 127 is MOOOVING, and in a miata its absolutely mental. IMO anything over 120 trap in a miata feels like rocket-ship speed.
Trap speed does kinda point towards high 300's/low 400's power, but if you launched it soft and didn't FFS that might explain it.

Bay looks fantastic as always. Out of curiosity: how much of a pain is having it dump fumes into your face? Do you street drive this car?

Do those calculators account for shitty-for-drag-racing gearing and aerodynamic capabilities similar to that of a brick? :rofl:

Either way, definitely not 475whp. I'm guessing 400whp.

Thanks! From everything I've read and compared to similar setups etc. i feel like i have to making over 450whp. Gtx30 at 26psi and e85 ignition timing + honda intake manifold. If its not over 400 then i should probably compression test. Ill have to dyno soon to get answers

As far as the exhaust, the only negative is the volume. I street drive occasionally to datalog/test and the fumes are non existent.

Wow, good job!
I have to agree with 18, 120 in a Miata is pretty scary, but fun too.

Here is the run. 2 step at 5500rpm. Doesnt build boost. I basically dumped the clutch, it spun immediately. Then hooked and bogged. I have a lot of work to do on the launch and shifting. Hooking up ffs right now. Hoping for mid 11s and 130mph the next time I go

Jeezus that's moving. I trap about that on the bike and i'm in the 10s. If you can get that thing to launch it would be one fast car.

1000cc?

850

With some mods.

My car will never be that low or that "slow".

It gives me inspiration though! :D

Awesome. That thing is putting down some serious power. Very clean under the hood too. Congrats!

So here's my latest pass. Went 128.87. Would've went 130+ but I hit rev limiter in 4th before the finish.

I cant get the car to hook up. As you can see in video, it spins off the line then bogs 2nd gear.

To launch I would go full throttle on launch control (4500rpm) then release the clutch pedal until the car moved forward then dump it the rest of the way. Spun every time even at 4000rpm

What slicks?

FWIW, my supercharged setup that weighed 2500 lbs ran 7.58 @ 95 mph, probably 350whp according to online calculators and the VD I ran, manual transmission. Your slip shows 8.08 @ 97mph. Not sure if you're car is heavier than mine, but I don't think 475whp is correct.

With a turbo I trap 6.93 @ 103, again 2500lb car and 400whp.

EDIT: 6.93 not 7.93

If you want a better launch, I recommend going to full boost with launch control, and then ride the clutch out to at least 20mph, preferably to 30mph. Like these. Both of these are 1.7x 60' times with a manual and drag radials stock axles.
SC:

Turbo

I dont really base anything on my 1/8th mile since it's so bad. In the video you can see it just spins 1st then bogs 2nd for seconds

I've seen your videos of your supercharged setup. You almost pulled the front wheels up

I know everyone on this site hates sexy time mr mattman but it's been documented that his car needed 500whp to go 130+ in the quarter

24.5 x8 wide on a 13" wheels

Bias ply Hoosier slicks
Attachment 223636

Just saw you measured 2100 lbs without you in the car. The numbers really don't add up, if you have 475whp and 2100 lbs, you should be trapping probably 115mph or so in the 1/8th mile. MPH and HP track really well regardless of ET, if your ET is really good the MPH goes down a bit but still it's close. If I do a horrible launch my car will run say 1 sec slower in the 1/8th and trap 105mph instead of 103mph. Small difference.

My car does launch well manual or auto, mostly just experience with the car.

His car was also slow for the advertised hp if I remember right. It's possible your car is also slow for the advertised hp. I could put 800 hp in my car and trap 127mph in the 1/4 mile, so what? That just means I'm doing something wrong or my hp number is way off.

It did bog like hell out of the hole and that hurts mph a bit for sure since you weren't hitting boost till 2nd started to rip. If it launched like my car did, I'd expect you to gain +5mph in the 1/8th mile which would put your 1/8 mile mph closer to what my 2500lb car did with 400whp. If you're 2100lbs, seems like 350-370whp would be my guess. What RPM do you shift at? That makes a difference too in both mph and ET.

Hey, if you go out again, change nothing, and just launch at full boost, slip the clutch to 30 mph. If your car has 475hp, it's going to run probably a 6.4 @ 115+mph in the 1/8mile. Record it, it's be one of the fastest passes anyone has made in a BP miata, surely a record for stock pistons!

Also, I meant to ask, what year pistons are you running?

https://cimg5.ibsrv.net/gimg/www.mia...8ad0e6e498.jpg

Be careful with those cast pistons. Sometimes when they fail under high boost they will break apart taking out the rest of the engine along the way. Could even be dangerous if its a catastrophic failure which penetrates the block or pan and oils down at 100+ mph.

While 127mph in the 1/4 is strong for a 4 cylinder, and ballsy with cast pistons, I have to agree with Pat. I'm heavier than you by ~250lbs and trap 105mph in the 1/8th through an automatic tranny as well and doubt I'm much over 400whp, if even that.

I ran 127mph in mine and its 400hp so i think you guys are on the money.

What is the trick to keeping those slicks off of your wheel wells or arches? It seems counterproductive to set up the suspension to prevent movement of the rear end.