Standing mile
 

What is the fastest standing mile in a 3rd gen as of now?

Are there no RX7's running the mile?

Howard Coleman went to the event, he may know what other FD's have run in the past.

We Fd guys like going fast around corners. Also the stock 5th gear ratio isn't necessarily the best for top end acceleration. A shit load of hp, great aero, and gearing is what you need. Hell I bet you Ernie T's Semi PP Fd would put down some great MPH if he had a Jspec tranny.

up.

Not rotary but someone with a Lsx/T56, 8.8 rear, low rear gears, swapped Fd ran in the 195mph range in the Texas mile. Was on You tube
.

i am aware of only one FD that has run the standing mile. it had a 550 rwhp V8 in it along w a T56 and ran just under 200. the nose was up a bit thru the lights. if it had been down it probably would have made 200.

there is a guy who generally runs his GT35 FC and i believe he runs 170-180. pls correct me if you have the exact number...

the Texas Mile is at the top of my list after finishing my turbo(s) project. the mile was one of the reasons i switched to a T56.

it is very interesting to compare the FD and the ZO6. executive summary, aero is really important thru the lights and the FD has a significant advantage w re to frontal area and drag coeffficient.

howard

My first standing mile run is 7.7.2012 then we see how much end speed +517hp give. my goal is 300km/h but i think i need better gears my transmission and more hp :-)

http://www.speedconcept.fi/speedpart...lmoittautuneet

my gears:
Differential ratio 4.1
5 gear ratio 0.806? japan version
tire diameter 27,16" (69cm)

top speed 7600rpm 300km/h ?

I would have thought the diff gearing from an automatic car would be more suited to this?
(Many will tell you that the snout flange on auto to manual diffs is not interchangeable- if you have a lathe & mill, yes, it is ;)

My first standing mile results 290km/h 180mph with rx7 fd 13b (dyno results 517ps)

-postert

"My first standing mile results...:

congratulations for getting out there:), it must have been quite a ride.

according to your tire diameter and gearing it looks like you were running 7360 rpm at 180 assuming no tire slip.

to run 200 (11% more speed) you have to either decrease frontal area by 11% or decrease drag coefficient by 11% { or decrease both for a total of 11%} or increase power by 36%.

drag HP needed to run a particular speed increases w the first power of frontal area and drag coefficient and the THIRD POWER of road speed...


180 X 180 X 180 = 5,864,400

200 X 200 X 200 = 8,000,000

8,000,000 / 5,864,400 = 1.36

1.364 X 517 = 703 hp to do 200

OTOH, if you could reduce frontal area/Drag Coefficient by 10% you need 630....

of course there are numerous other factors, one being your torque curve and it's relationship to transmission gearing. the primary reason i switched to the T56 w the 2.66 first is to get a closer spacing between the gears so i would be more to the right on the torque curve. i pick up around 600 rpm V the stock FD gearbox.

did you log your runs? running your motor thru 5 gears is no small feat. 5th gear is a major pull for the motor.

congratulations!

howard

Hi,

here is my logs.

When i drive my standing mile there is hard side wind and i have to put up gas pedal couple time :-( you can see it my logs.

Thank you for calculations.

Besgt regards,

Postert

any idea of the speed at the 1/2 mile mark?

Abaut 155mph

video my run 09:40 Results:
http://www.speedconcept.fi/speedpart...aista/142-2012

New video
MR-Foto.fi

Car went 196NA and 207mph low boost

My second standing mile run with 13b engine 302km/h 188mph.

I have always wondered about standing mile times for fd's. I went to the texas mile years ago as a spectator and didn't see a single fd. but about 15 supras!!! only fd I could ever find was the one that's already been posted at 195mph with the ls motor.

So I guess the record 207mph. that's gonna be tough to beat!

Speedparty 2013 results, only one rx7.
results are km/h

http://www.speedconcept.fi/images/ti...3_tulokset.pdf

I did 184.8mph at the Texas Mile last October. LS2 with 465rwhp.
With a 99+ lip and no rear spoiler, the rear was a little wandery above 165!
I might do it again sometime with front lip removed, a front undertray, rear diffuser, and possibly wheelcovers. No power mods planned, though, so I think 186 or so (300km/h) is about all she'd be good for, but that would be a cool target to hit :)

registration for the Oct 25 Texas Mile opens (and probably closes) Aug 11. it is my intent to run the Oct event and it will require a successful dyno session before Aug 11. i have been wanting to run the event for a few years but XXX happens.

i plan to run half gas and half E85. Postert, what fuel were you running?

as far as the FD being a road course design.... absolutely. as one who has been a road racer all my life i couldn't agree more.

there are a couple of reasons i want to do 200 w the FD.

top of the list is to show that the 2 rotor motor can kick ass, the second is to demonstrate what superior aero is all about.

dyno results during the next 3 weeks will determine if i am on the entry list.

howard

Good luck, Howard. You've been a leader in the rotary community for a long time, and it will be cool to see you run The Mile.

Good luck Howard! Represent us right!

hi,

i run 98e5 with 50/50 water methanol injection.
my dyno result is only 530ps/ 20psi
Standing mile run boost is 23psi abaut 550-570ps
i change biger exhaust housing my old was 0.81 new is 1.15
my hi rpm power curve is better.
my front bumper is aftermarket model, i think at stock bumper aero is better.
my car is street car with mirrors etc.
underlay is flat, i install aluminium panel.
no rear wing.

188mph/ 7700rpm

i think i change my turbo (turbonetics t66) Borg Warner S400SX3 t4 Turbocharger With Attenuator "Race Cover" (74mm) 1.1 exhaust housing
Here is compressor map:
http://www.agpturbo.com/borg-warner-...ce-cover-74mm/
What you think this turbo, my power goal is 650-700ps?

good luck, i hope at everything go right and you can make 200mph

"i run 98e5 with 50/50 water methanol injection."

i highly commend you on your fuel choice. IMO the standing mile is many times more stress on the engine than the 1/4. many. as such heat build up, which is part cumulative, is a real challenge. the SM takes around 30 seconds so it about 20 more seconds ON TOP of the 1/4. and a great deal of it is in 5th gear. (really heavy load).

the Beyond Redline dyno is capable of 200 so we will be dynoing at that mph.

alcohol with its tremendous cooling abilities is the solution. so you are on the money fuel wise. i also like it that you are adding a touch of water and meth.

"my dyno result is only 530ps/ 20psi"

i get what you are saying but leave out the "only" 530 at 20 is something of which to be proud.

"Standing mile run boost is 23psi about 550-570 ps"

it is good to see your motor is capable of running at that power level for such a long time.

"bigger exhaust housing my old was 0.81 new is 1.15
my hi rpm power curve is better."

yes

"my front bumper is aftermarket model, i think at stock bumper aero is better."

Mazda worked very hard on the front of the FD attempting to have as small a nose inlet as possible. most aftermarket noses are designed to offer more cooling inlet area at the tradeoff of much larger drag. it might be the single best thing you could do for the car to go back to the OE 93/95 nose. an easy 10 mph. force required goes up with the cube of CD X frontal area. you are driving a brick.

"my car is street car with mirrors etc." the mirrors are worth losing... you probably wont miss them at 200.

"underlay is flat, i install aluminium panel." ideally, there should be no air under the nose. check out NASCAR on any track more than a mile. they are all about as little air under the car as possible.

"no rear wing" main thing as to longitudinal trim is that the nose not rise thru the lights. if you add downforce in the rear w a wing you lose downforce in the front. to the extent the rear lowers, the front rises.... ideally you want zero front nose lift.

"188mph/ 7700rpm" sounds about right, i am going to look at your logs.

"change my turbo (turbonetics t66) Borg Warner S400SX3 t4 Turbocharger With Attenuator "Race Cover" (74mm) 1.1 exhaust housing
Here is compressor map:
http://www.agpturbo.com/borg-warner-...ce-cover-74mm/
What you think this turbo, my power goal is 650-700ps?"

the T66 makes 67 pounds air or 505 on gasoline.

the BW you are looking at can make 90 pounds of air (gas) which is right on your power goals on gas and above them on E85. i figure it takes 600 to do 200.

how does the car drive at top speed? i have run 165 in mine at Brainerd into turn one which is banked and you could read a newspaper in the middle of the turn. 200 may be a different animal and the main thing is to stay on the ground w a planted nose.

are you running stock axles? what clutch?

holy canoli, i just looked at your video, no helmet? your front end is a real bulldozer w the monster oil cooler/brake scoops, probably close to 10 mph V the OE 93 nose. also see what you can do to lwoer your ride height and what's w the large amount of neg camber in the front?

please do understand i commend you for your accomplishment and am quite envious as well. overall a super job of prepwork on your FD:)

howard

I was thinking about going again, but probably not going to make it this time...

For absolute top speed, aero is of course huge.
But for standing-mile trap speed, which is also a huge function of acceleration capability, outright power is actually twice as important as aero drag (or weight).

I made a performance prediction spreadsheet for my car, and predicted my Texas Mile speed within 1mph! I just did a study on drag reduction vs. weight reduction vs. adding power:
baseline: 184.8mph standing mile
baseline with 5% less aero drag => 186.3mph, +0.8%
baseline with 5% less weight => 186.3mph, +0.8%
baseline with 5% more power => 187.8mph, +1.65%

I think you're going to need about 587 rwhp to hit 200mph in the mile. Based on both the 196mph effort from the ~650 crank hp FD (650*.85*(200/196)^3), and my 184.8mph with 463rwhp (463*(200/184.8)^3).

Mazda worked very hard on the front of the FD attempting to have as small a nose inlet as possible. most aftermarket noses are designed to offer more cooling inlet area at the tradeoff of much larger drag. it might be the single best thing you could do for the car to go back to the OE 93/95 nose. an easy 10 mph. force required goes up with the cube of CD X frontal area. you are driving a brick.

Next standing mile run i install OE 93/95 nose, i already have it.


how does the car drive at top speed? i have run 165 in mine at Brainerd into turn one which is banked and you could read a newspaper in the middle of the turn. 200 may be a different animal and the main thing is to stay on the ground w a planted nose.

Car was very stable and very easy drive, nothing broblem.
i have öhlins suspensions and some power flex bushing.

My brake modifications:
-New stock diameters brake disc (brembo racing)
-Front Ferodo racing brake bads
-Rear ebc brake bads
-FERODO Super Formula brake fluid
-HKS brake hose

are you running stock axles? what clutch?

Yes, stock axles with cusco differential and 4 blade sinter clutch with centerforce pressure disc.

holy canoli, i just looked at your video, no helmet? your front end is a real bulldozer w the monster oil cooler/brake scoops, probably close to 10 mph V the OE 93 nose. also see what you can do to lwoer your ride height and what's w the large amount of neg camber in the front?

Second 188mph drive i have helmet, i recommend it.
188mph run my car is 1/2 inc lower than 180mph run, it hard lower it anymore.Tires cant roll.
My car overall weight is 1200kg/ 2645lb
i have stock camber in the front.

Best regards,

Jani