1300 Kg Track SUPRA project

Enraged

A HG job took HOW long??
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what do the vents in the fenders do? just heat extraction? did you do any ducting? did you do any testing to see the best spot to put it?

I'm always impressed by the work you put into your car :)
 

Rollus

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I haven't been notified about your answer, and even the other posts in this thread grrrr..

if that is correctly , -3,5 to -4,5 not for street use
you can not imaging how many times i was looking for one of those ....but in the end the Beech ones are better.
Thank you Josbeat for this information, that what I thougt.

Your results are very impressive, I'm a fan!
I will move to see you race. Please post when you move in France or Germany to race, and ho wait, during may, july/august I'm in Biarritz (France) near San Sebastian (Spain)
 

josbeat

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what do the vents in the fenders do? just heat extraction? did you do any ducting? did you do any testing to see the best spot to put it?

I'm always impressed by the work you put into your car :)
hi!
the idea is to release the presure in that aera, but it may be bigger , in the last test still have debriss on the back of the fender in the edge with the doors but a lot less than before so it is working.
 

josbeat

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I haven't been notified about your answer, and even the other posts in this thread grrrr..



Thank you Josbeat for this information, that what I thougt.

Your results are very impressive, I'm a fan!
I will move to see you race. Please post when you move in France or Germany to race, and ho wait, during may, july/august I'm in Biarritz (France) near San Sebastian (Spain)
hi! rollus
i will see if i have something next year close to there and tell you
regards
 

josbeat

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this year i really enjoy the time with my Supra , really a good year with it.
Spa Franconchamp, Nurburgreen, firts Timeattack victory, allways on top of the lap times and the people talking about te Supra and me very well so nice with out problems.

I dont know if all of it was possible because the new 2jz engine swap or not but i really miss the last 7M engine i builded... bad decision of let a friend help me on it.....
soon i will open a thread of it , i think it will be nice to show what could be the best 7M engine , fixing the oil lubrication and the temperature problems of it when using it in racing.
 

Beals

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this year i really enjoy the time with my Supra , really a good year with it.
Spa Franconchamp, Nurburgreen, firts Timeattack victory, allways on top of the lap times and the people talking about te Supra and me very well so nice with out problems.

I dont know if all of it was possible because the new 2jz engine swap or not but i really miss the last 7M engine i builded... bad decision of let a friend help me on it.....
soon i will open a thread of it , i think it will be nice to show what could be the best 7M engine , fixing the oil lubrication and the temperature problems of it when using it in racing.
the jz series is a rev happy engine with a lot of potential race built engineered in the design. Honestly you'd be better off putting a 3sgte into a supra then 7M for a race car, I feel like that would drop weight & help distribution as well as give you a decent powerband.
 

josbeat

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1.360 kg is the actual weight of the car with 30 ltr of fuel and with the 25 kg provional in test flat floor .

Beals . I was thinking in two engines , that 3sgte and the Ford sierra cosworth 2.0 ltr turbo with aluminium block.
but the 2jzgte vvti boosting aroound 15 to 22 psi give a decent power safelly but those two liters engines needs a lot of mods to get 400 cv? but not for long time safelly.

I was thinking to buy an 2jz aluminium block firts if i need to low the weigh more , i dont know if it is only good for drags , i will see.

dont know now the weight distribution but i moved all as back and low as posible and allways beetwin the two axels, if you see the video, that supra (mine) anly need to reduce the weight till 1300 kg with some plexis and carbon panels for the flat floor , also the rear sway bar moved to 1 point stiffer and that is what i need to make it really fast.

if one day i decide to change the engine for a 2 turbo engine .... i put all for sale and buy a mitsu evo.
 

SeeUSmile

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josbeat

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THANKS! for the link
curiositis.
no sway bars
no cover under the engine
full parallel double wishbones
mmmm no a good roll center desing I thing!
arround -2,5º of caster at the front
but not 1000 kgº imposible.
no rear diff cooler
standar door glasses and electric lifters!!
it is ready for pasenger seat.


i was thinking how to get it to low to 1200 kg and it will be necesary of a aluminium block and many carbon fiber ,radiators be reduced till the minimun necesary , no dashboard at all , plexy glasss ,one seat only.... a looooottt of money
 

josbeat

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Last updates are the best
Rear sway bar moved to the hardest positiom made a big improb in the chassis now is perfect in the enter in the midde and in the exit of the corners
New Tial water cooled wastegate made the miracle, no more boost problem.
New hand made rear diffuser in carbon fiber
New brake lines routed away of engine radiant heat left the brakes at really hihg levels of performance.
A 12 different injection maps with a smooth and linear power band also help to lower 7 seconds!! from the last year to this year in the same closed track , and it could be more lower easy.
Last track day i left many GTR bejain me and some Audi R8 also heavy modded mitsus ,,faster than many Lotus, Catherhams.... really happy because it was with a pasenger and with an old set of semis .
 
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josbeat

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josbeat

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OK today i went to weigh the car front and back and the total is 1340 kg 10 kg less than the last time due a new rear diffuser in carbono , 750 kg front and 590 kg rear
it had aprox 20 ltrs of fuel ( 20 kg ), the pasenger seat on (11 kg), a set of especial emergency tools (5 kg) and a 5 kg lighter flat floor waiting to be fitted total arround 40 kg less

without the pasenger seat and rails and without fuel in it but with street tyres.....wet weigh is 1300 kg !!!


now i like more.
policarbonate windows (all except the front one) don t kow but maybe -15 kg in total?
fixed lights -7 kg
removing the heater box and blower motor maybe -5 kg
removing the water methanol another -5 kg
removing the electric paddelshift system - 3 kg
lighters radiators both arround -4 kg
door paneling both -6 kg
windows regulators , dont know but maybe -6 kg

in total maybe -50 kg ???

1.250 kg supra Mk3 with a 2jzgte vvti single turbo with tomei cams and 1.2 BAR ,will it be sufficient to win the time attack championchip next year????

ok here is the situation ... is worth the efforth to reduce the weight to 1250Kg ???

the last thing to remove is the dashboard but it is not heavy so how it is posible that Benami supra weight 1050 kg !! is imposible
with out cage and with out aero bits i can low till 1200 kg that is the minimum weigh we can have on a Supra MK3 but remember that, i have ceramic brake disc (15 less ) they dosnt exits on the 80" and 90" !! and carbono doors, carbono hood and many parts that wasnt posile to be removed on those days when the MK3 was racing,
with a cage fitted ,less than 1250 kg is not posible if usind the original body and frame.
well on a NA supra ... no turbo , no intercooler and what more to remove 200 kg ??

I have a very light and simple roll cage of chromo
carbono doors
ceramic front brake rotors
no parking brake
also i have a simple pedal box!!
lightened suspension front and rear
ligth fuel tank
no brake booster
no ABS
no air cond
no bumpers reinforcement ( changed for aluminum ones)
glass fibre bumpers
carbon fibre side strips
tower bars in aluminium
nascar aluminium steering rack
aluminium short drivesahft
all of those to get 1300 kg !!!
what i dont have done is to removed the paint under the car floor but i dont know if that anti-stone paint is really heavy because if not ... i don know how they did.

conclusions....
some one is laying.
the solution is not the 3sgte because some were say it weigh 124 kg
the 2Jzgte is heavier than the 7Mgte
fitting a 2.0 lt turbo cosworth with an aluminum block will be arround 60 kg less but it will left the actual weight in 1200 kg with cage with out aero bits -20 kg 1180 kg.... without swaybars -10 kg 1170 kg ... without dashboard -5 kg 1165 kg ....with out the under floor paint -5 ? 1160 kg ..... with out adjustable seat rails -3kg 1157 kg..... front galss in plexi maybe -5 kg 1152 kg.... rear hatch door in carbono + aluminum wheel hubs + carbono wheels + carbono fenders +.... maybe 1130 kg but what is the money we need to waste for it?

i will try to low the weight next year till 1250 kg and see how fast it can be.
 
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atmperformance

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I support you reducing more weight, I like a lot of your ideas with the exception of the radiator. The only way I see the radiator getting lighter is to make it smaller or really thin wall end tanks? I would look doing your windows way before putting to risk your cooling.

Also is the flat floor for under car aero or just weight reduction?
 

josbeat

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hi! again
i forget to say also i am using an Antgravity battery which only weight 2,5 kg!!

the "flat floor" i am refering is the aero thing i fitted under the car,the two middle pannels are in playwood of 5 or 7 mm (dont remeber well) and now will be in 3 mm , the rear diffuser now is very light and i am trying to reducing the rest, but the flat foor work very well in my Supra but is true that to know exactly if is better with or without it i will need to do some track test.

the idea is to reduce the weight in front of the axel and there is the Beams and the radiators.
I thing we are using too big intercoolers , with the intake pipe routed to outside of the engine bay the air temp in my car now is allways very low, i will check the IAT when pushing hard very well before touch it anyway.

the 3 row water radiator i am using is heavy aswell and the temperature also with thermostat fitted, on the track is 90º and goes down to 84 º very quickly when not pushing, using a good two row radiator well mounted .... will be suficient i think.
 

Grandavi

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A thought nobody likes discussing because it isn't native is that the LS aluminum block is supposed to be 100 lbs lighter. Not a difficult swap and many benefits. Not sure of benefits when comparing full swap to original, because driveshaft to rad has to be changed. (You can keep the r154 but a tremec 5050 6 speed is appealing...

Just throwing the thought out there.
 

Billybob9187

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A thought nobody likes discussing because it isn't native is that the LS aluminum block is supposed to be 100 lbs lighter. Not a difficult swap and many benefits. Not sure of benefits when comparing full swap to original, because driveshaft to rad has to be changed. (You can keep the r154 but a tremec 5050 6 speed is appealing...

Just throwing the thought out there.
I agree and there is nothing like a stroked na small block on the track either..........................
 

Flateric

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Wow, super nice and light, the closest I ever got to this was 1474KG, or 3250LBS.

I curious, do you actually know of where you can get an aluminium block 2jz, or did I misunderstand the conversation.

Do you have any video footage of your car on the Nurnbergring, I used to live minutes from there and would love to see this, made extra sweet because of a MKIII on it.
 

josbeat

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Wow, super nice and light, the closest I ever got to this was 1474KG, or 3250LBS.

I curious, do you actually know of where you can get an aluminium block 2jz, or did I misunderstand the conversation.

Do you have any video footage of your car on the Nurnbergring, I used to live minutes from there and would love to see this, made extra sweet because of a MKIII on it.
No i dont have videos , only photos
I was looking to see if will it be posible to buy the block in aluminium but the only one now is to use on a drags compettition engines. Not for street use.
Hard job to get the supra as low as it is now but allways with patience and Money is posible to lower the weight more jajajaja