Post your 1/8th and 1/4 mile timeslips here please
 

I know many, if not most Miata owners consider drag racing a fools game but there are some who are into it and enjoy building and testing for that purpose. Most of us who do drag their Miatas realize its not the best platform for that purpose but many like the challenge.

I wanted to create this thread for guys who do drag their Miatas to have a place to post their results and basic mods required to achieve those results to not only display the fruits of their efforts but also for others to see what works and what doesn't to get the most bang for the buck in their projects. Useful information will be basic turbo setup and boost, Estimated horsepower if you know, transmission type, and rear tire size/type required to achieve the results of whatever timeslip you post. Also altitude of the track will be good to know, A picture of an actual drag strip timeslip will be most desirable to post, but in the absence of a dragstrip you can post trusted to be accurate data as well such as vbox, dragy or others just so long as they are proven to be a reasonable match for dragstrip data. If you have data from a timing source that was used at same time a run was made while at a dragstrip and can compare those results with the timeslip to help others to prove or disprove the accuracy of that device, please post that as well. However if you post data other than a timeslip please include 1/8th mile test in the result, reason being many tracks now only run 1/8th mile, the ones that do run 1/4mile also include 1/8th mile data on the timeslip, so if everyone has 1/8th mile data it helps all to compare mods vs result for same data point. Would be great if this could be sticky.

I will get the ball rolling.
99 Miata. Wiseco off the shelf pistons, chinese h beam rods, arp hardware, ebay gtx3076, ebay cast log manifold, ebay intercooler, stock head and cams, built and much modified by me jatco 4n71 style tranny(out of early miata, mazda calls it a nc4a-el), stock rear with poly bushings and rear alignment set for tires to be square with ground at launch, custom compressed air system to quickly spool turbo at launch, rear tires are nitto 555 extreme drag radials 245/50/16 (lots of hammer action required for fitment!!)

Boost was set at about 31-32psi for this run.
https://cimg0.ibsrv.net/gimg/www.mia...4e20f03069.jpg

This is dragy result from same run. this helps to prove reliability of this device.

https://cimg0.ibsrv.net/gimg/www.mia...f033b6f8cb.jpg

thats fast

really fast!
I can only imagine what it takes to go from 60-125 mph, my guess is under 10 sec.

a 6.91 second at 105mph in the 1/8th mile converts to roughly 10.8 seconds at 130-132mph in the 1/4 mile. So definitely under 10 seconds 60-125mph. Actually knowing my 0-60 time on this run (dragy reported 2.76 seconds with factoring rollout and 2.98 without) and my 0-100mph time (dragy reported 6.32 seconds) it took 3.32 seconds to get from 60-100mph so add roughly 3-4 seconds to go another 25 mph that would be approximately 6.3 to 7.3 seconds 60-125mph

I'm not sure its worth posting... but when I ran my bone stock NB and got the following results to baseline it:

60' - 2.144
330' - 6.36
1/8 - 9.881
1/8 mph - 69.92
1000' - 12.925
1/4 - 15.512
1/4 mph - 87.24

https://cimg4.ibsrv.net/gimg/www.mia...7b8733b3fe.jpg

Video of run:


MKTurbo kit with larger turbo, FF640 injectors, Skunk2 Honda B series intake, 3.63 torsen, 225/50-15 M/T ET Streets, 20psi

What turbo and how much boost were you running on this run?

Edited original to include that. Link to turbo just for illustrative purposes. I found it for $250 or so if memory serves.

that reaction time though

:laugh:
Asleep. I get shit from the timeslip woman if I take more than a tenth, "Wake up!" she says.

It was test and tune night, my first time back at a dragstrip in over 20 years and I was just there to test the car and my spool shot system to spool turbo. I wasnt trying to cut a light. When and if I decide to be a regular again I will get good lights. I bracket raced for years in the late 80s through the mid 90s so I know how to cut a light. Both me and the car have a lot more in them LOL..

I was real good at some things 30 years ago too


Just poking at ya bud

NB 1.8, Stock bottom end, 60/40 Methanol/99RON, WRX TD04-13T @ 15psi

Probably a 12.5 in it if I could string everything together, I either do well after the 330ft or 60ft well and miss a shift or something equally dumb

https://cimg8.ibsrv.net/gimg/www.mia...9008ab30d6.jpg

Not proud of this 60'... But just for reference here is my 2nd pass of my life (last wednesday).

60' 2.747
330' 6.34
1/8 8.981
1000' 11.199
1/4 13.065
MPH 121.89

So I think that is a 12.0sec run if I could pull my $#@t together on the 60'. Fast car, slow driver. Fun!

This is at Bandimere in Denver for reference (altitude) on a 90F day.

Nice.. 120mph.. you're moving! How much power are you making?

i figure upper 300s. I dyno'd at 250kpa and 355hp. So that run was 270kpa. I think I have room for more, but need to control the intake temps and watch carefully for knock.

Denver at 90F is tough to make power so that's a really good mph.

A lot of the big boy turbo v8 setups were running ice cooled intercooler setups. Anyone ever try that?

I'd guess water injection would be easier to plumb.

Great idea for a dedicated drag car. God awful for a car that sees the street.

its more commonly called an ice box. pretty simple for street cars to use that already have liquid to air heat exchangers. very popular for cars with factory superchargers (terminators, CTSV, ZL1 Camaro, etc).

NB1 comfy street car >2500#'s with fuel and driver
MKTurbo, the big one
MS2pnp
FF960's
DW300
IGN1A's
18x3x11 CX intercooler
E85
Manley rods
CP pistons ~9:1
Stock head, refreshed with stock parts
ARP studs top and bottom
Probably 27psi up top
Crappy 195 all season tires

This was at Vlad's local track and I was pretty consistent that night. It was a few days before I broke one of my many 5 speeds, before I was taking it a little easy on the thing. No launch control or flat foot shifts, but definitely beating on it.
https://cimg3.ibsrv.net/gimg/www.mia...9bfe615dc8.jpg

Carlos

First time ever at the strip and it was my best pass out of 4 - Right Lane ... Need to work on my starts as I only got worse the next 3 passes. Missed 3rd on one then did a 2nd to 5th on the next ... Getting a lot of wheel hop on hard launches. Running old RS3's.

https://i.postimg.cc/cCwcj5m3/IMG-5448.jpg

99 Stock with MKTurbo LARGE Churbo EBC at about 18, FF640's, DW300, MS3X 5 speed and I am pretty sure I have the 4.1. Running 225/15 RS3's on 9" 6UL.

Wheel hop is killing your 60' (like mine does). I'm putting in new rear tranny delrin bushings. What is the condition or your rear end (if you don't mind me asking).

Miata owner wants to know if your rear end is tight or soft.

https://cimg1.ibsrv.net/gimg/www.mia...5f2479ff6a.jpg

I'm car 5445. Struggled to hook up, ZMax doesn't do any track prep on test and tune nights.

Good job!

You may consider riding the clutch more on the launch.

This is me launching at 5-6K but not fully releasing the clutch until about 20 MPH. No wheel hop and this was running 1.7x 60' times on a test and tune night with awful track prep. (cleaning up a spill is considered prep, lol)

Also my best time is 6.93 @ 103mph in the 1/8th. 1.67 60' time. I need new tires and some practice, the car should be good for 1.5x 60' times now.

No doubt you'll eventually get down to that 1.5x 60 ft. with your transbrake and driveline setup.

What was your 1/8th mile time and trap back when you were supercharged?

LOL ... Not really sure. How do I find out? Seems to work fine but I do have some slop in the drivetrain ... maybe in rear end?


Awesome runs! Was hoping to see you on Thursday night at Mooresville and get some tips!

Supermoto - if you get wheel hop in the rain or on ice, then you've got a loose rear end that needs some special love and care.

This is from memory, I know 7.58 was best ET, MPH was I think 95mph. Might have been 92-93 though, but I wanna say 95.

Looks like koengsegg is using something very similar to what Im doing as well. They are apparently using an electric compressor, whereas I'm using an engine driven compressor, well actually a modified air conditioner compressor.
https://jalopnik.com/the-new-koenigs...ong-1833061455

Silly FWD LOL

https://cimg4.ibsrv.net/gimg/www.mia...e40fc6b67e.jpgS
https://cimg3.ibsrv.net/gimg/www.mia...abd145c507.jpg

Although not a miata I figured for something different I would post some data from last night at the track with a friend. He has a drag Baretta and needed some help as his normal helper couldn't go, so I went with him as his crewman. His barretta has a Shafroff built small block and makes almost 800hp at the crank. He has the timeslips but for one of his runs I attached the dragy to his cage and pulled some data so I am attaching a couple screen shots. One is a shot of the 1/8th mile data and the other is the 0-60mph time achieved on that run. I also am attaching a youtube link of one of his runs. Unfortunately the video I have is the one that put him out...
https://cimg2.ibsrv.net/gimg/www.mia...e3013c3a87.jpg


https://cimg9.ibsrv.net/gimg/www.mia...2083a8886f.png

I took some weight out of the car recently by getting a ccp hardtop and eliminating the soft top and all associated hardware. I removed all the ac related stuff from under dash, air bags, the no longer used clutch pedal, clutch master cylinder and the spare tire and jack. There may have been a few other things Im forgetting now, but that was then bulk of the weight removal. Car picked up about 1 mph trap speed. Hard to say on the et as track was not that great today it seemed. My best 1/8th mile today was 6.99 seconds at 106mph. There's more in it as traction was an issue today. In fact you can see in the timeslips I posted on one pass how bad it was. My previous best was 6.91 @ 105. If I decide to keep this car then next year I may do something about the rear end and traction issue.
https://cimg6.ibsrv.net/gimg/www.mia...2588ea12a8.jpg

What are your plans to improve traction? Aren't you already on a drag radial? Softer spring settings?

Yeah I'm on drag radials currently. I'm using nitto 555r in 245/50/16 size. I was seriously considering doing a back half and solid axle this year, but decided against it, at least for the time being. I'm going to upgrade to hoosier drag radials after the nittos are worn out, which will be very soon. They are softer rubber compound and are more race oriented so should be an improvement.

Just came across this. In one pass they run darn near 170mph in the 1/4 mile with a mazda bp. Im going to see if I can find more info on what was done to the engine, but this shows the bp engine having more potential than most realize.

https://cimg4.ibsrv.net/gimg/www.mia...bbf9c8c676.jpg
Car #74 1st pass in this car. Stock 1.6 with t25 ebay boost, begi manifold, speedyefi, FF 640, 10 psi untuned. Dumped the clutch at about 3500

100% agree about the BP having more potential than most give it credit. I'm currently trying to find more info on this build as well as a few others. I'll DM you with what little info I've been able to gather. I have a hard time finding people that care at all everyone is generally dismissive or advocates swapping motors now a days. More power to them swapping tho I want the price of BPs to drop again lol

Time slip in the comments.

https://www.facebook.com/watch/?v=203867100766997

Yeah thats a bad boy for sure. Would really like some details on this thing if anyone knows exactly, such as engine and turbo setup, transmission, rear setup and gearing.

I believe it's a 2.0l BP, turbo is just a gigantic older Garrett but I could be wrong on that one, it's definitely nothing modern. Has a Powerglide and it's back halved so solid rear axle.

Personally I love the BP. I am the type that doesnt like engine swaps and wants to make the most of what engine is in the car already. The BP can take a bunch of abuse if you throw rods and pistons at it. I think for the really big HP guys sealing the head is the biggest issue and thats over 800+whp. If the BP had a better support for the crankshaft and better flowing head it would be perfect. Im only making 350ish whp on mine but Ive been rocking a BP since like 2002.

Sce has cut ring gaskets now which should be an improvement over the mls gaskets, but likely not quite as good as doing an oring/copper setup. They are a little pricey but I will be using these next if I decide to continue usnig the bp engine. https://www.summitracing.com/parts/sce-cr330057

Swapped the nitto 555r drag radials with hoosier dr2 drag radials and recorded new best time posted below. Also added additional 3 gallon air storage capacity to my spool shot system. All else is the same as used previously.

I also had the dragy running on this pass to measure other data points. Dragy reported a 0-100mph time of 6.08 secends and a 40-100mph time of 4.15 seconds.


https://cimg0.ibsrv.net/gimg/www.mia...bea95ba6b2.jpg
.

At what rpm are you leaving at?

Thats kind of a hard question to answer precisely since I have my setup to where I can leave in different gears and spool shot settings. This is all experimental and Im still working out best setup.

For last night I was foot braking full throttle in third gear at the first yellow and releasing the brake immediately after seeing the third yellow. I have one transmission configuration that when activated, and shifter is in low, it releases the intermediate band which in effect applies 3rd gear. The brakes will hold in 3rd gear at full throttle which also allows a little higher stall speed. I had it set to where when foot brake was released it would apply the intermediate band in the transmission which effectively applies 2nd gear and also activates the spool shot at same time. I always launch in 2nd gear and only use 1st gear for the burnout. I will say though that the best 60' times in the past with the nittos were to simply foot brake in 2nd gear and activate the spool shot immediately before launching. I will try that method next time I go and believe if I time everything right it will possibly dip into the 6.70s. However its very hard to time it right using that method since if i activate spool shot too soon it will push through the brakes.

I did take a log on one run last night so I can try and give you a short answer from that log if you can wrap your mind around the above setup description I was using last night.
Applying full throttle and foot braking at first yellow the converter stalled to around 3300-3400 rpm and built a little over 2psi. Right after seeing third yellow brakes were released which automatically applied 2nd gear and activated spool shot at same time. After release of foot it took about 9 tenths of a second into the run to reach 30 psi and 5500rpm.

Cross posting from my build thread, 6.2 LS making 400whp.
https://cimg1.ibsrv.net/gimg/www.mia...354189edd8.jpg
https://cimg6.ibsrv.net/gimg/www.mia...b3706e70ce.jpg


Think low 11's aren't out of the question with a better 60', i've done a 1.75 on street tires with the old setup.

Dude the rear view mirror falling off made my day!!!

Congrats! She's a mover for sure. Nothing like the sound of a v8 singing down the track. I do miss that over the 4 cylinder.

Thanks bud, yeah it's not as impressive as doing it with a BP but there is something to be said for an 11 second car that can make laps around a road course for an hour at a time. As well as being docile enough to drive 2hrs to the track if you feel the need, getting 25mpg while you're at it.

91 miata-ish
142,xxx mile stock 1.6
​​​​unknown turbo @ 18psi
​​​​makes 230whp @ 15psi
FF 640
Speedyefi pnp
Walbro 190lph w/91 octane
Federal ss595 205/40r17
personal best of 12.82@104
https://cimg0.ibsrv.net/gimg/www.mia...b661a13753.jpg

Hey 208fab. Congrats on new personal best. That not a bad 60' time either.

New best time!!

https://cimg8.ibsrv.net/gimg/www.mia...8cec6a2ff9.jpg

https://cimg6.ibsrv.net/gimg/www.mia...d2d1789ee3.jpg
managed a new PB this weekend. not bad for a bone stock 1.6 and 5 speed with an ebay t3 turbo, ID1050 injectors, E85, Walbro 190hp and Speedyefi ecu in a car that was built and tuned by an idiot, ie. myself.

Hey 208. Congrats on new pb.

New best 1/8th mile elapsed time. This is with speedyefi now. All else is same as prior.
https://cimg3.ibsrv.net/gimg/www.mia...c7dd6d756a.jpg

Crazy you are doing that without a transbrake.