Standing mile
07-14-13, 12:00 PM
#26
Racing Rotary Since 1983
iTrader: (6)
"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 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
Last edited by Howard Coleman; 07-14-13 at 12:14 PM.
07-14-13, 07:08 PM
#27
Senior Member
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 ***, the second is to demonstrate what superior aero is all about.
top of the list is to show that the 2 rotor motor can kick ***, the second is to demonstrate what superior aero is all about.
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%
dyno results during the next 3 weeks will determine if i am on the entry list.
07-15-13, 01:52 AM
#28
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Join Date: Sep 2008
Location: Finland
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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
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
