Done with the first event for the year.It was very cold ,and to make it even worse my ABS stopped working early in the morning. Here are a 2 pictures that someone took when I was "breaking" 
STALX Supra - The Ultimate Time Attack MKIII
- Thread starter LordDigital
- Start date
This is the cost of the ownership of a Supra with Heim Joints (aka uniballs) ,Camber arms and toe arms all had play and I had to replace them. Notice the ammount of wear on the inserts for the camber arms ,apperantly A1 have new verisons with conic profile that appear to be a lot stronger. I also replaced the inners on the toe arms with poly's ,even tough I really don't need them becouse I'm pretty much done using rear sway bar on Supras.
After I got rid of any and all play ,the car had to be aligned. This time my alignment guy exceeded by expectations ,this is what I called "ze perfect alignment " He is German BTW the best in for Race alignment in Chicago Area.
After I got rid of any and all play ,the car had to be aligned. This time my alignment guy exceeded by expectations ,this is what I called "ze perfect alignment "
He is German BTW the best in for Race alignment in Chicago Area.
How streetable do you think that alignment is? I want something that will make my car handle really well but not make it unbearable to drive on the streets. Do you think that it is safe to go without the sway bars on a street car if you have a similar suspension setup like yours?
How many miles did you get out of those heims LD? I gather this doesnt get driven on the street? I have all of the wes arms ready to go in (as you know) but im reluctant to use the car on the street at all due to what I see above. Also have you solid mounted your front and rear subframes or are you using poly?
honestabe;1840970 said:
This is very streetable setup ,depending on the power and rear tires I may remove 1 degree of rear camber and set it to -1 ,also depending on driving style front camber may also be reduced a little to improve emergency stopping on the street. Other than that ,very streetable with the rear toe in.
spiller;1841001 said:
Milage is hard to tell ,my traction arms are upgraded to minebea ,but I've lost the part number and it was a real pain to get them- these never failed me ,but the price was 3x more than replacements from A1. For the rest depending on the track usage I check them yearly ,and often replace them once every 2 years. On the street these would last a lot longer ,high grip abuse would eventually killed them IMO.
I would have thought the street use would increase the wear with all of the drains and potholes you encounter as opposed to a smooth race track. What is the comfort like on the street? Also you didnt answer my subframe question . Im interested to know what solid subframes feel like on the street too (im assuming yours are solid mounted)?
. Im interested to know what solid subframes feel like on the street too (im assuming yours are solid mounted)?
spiller;1841028 said:I would have thought the street use would increase the wear with all of the drains and potholes you encounter as opposed to a smooth race track. What is the comfort like on the street? Also you didnt answer my subframe question
In the FIA/JAF Homologation papers I see reinforced Rear Diff housing ,I also see homologation for the reinforcement brackets (that 89+ showed on the road cars) ,but I do not see solid mounts or any means of roll center correction ,thus I reinforced my subframe and installed nylon spacers to be safe
That's interesting, where did you get the nylon spacers from? Custom made?
I have some alloy ones here that wes machined up for me but im not sure I want to use them. I dont think the supra really suffers from a lack of roll centre correction in the same way that say Nissan S13s and R32s do but the factory rubber subframe spacers are no good for the track IMO.
I asked John Smith about his subframe arrangement and he said they were "braced and mounted solid" although nylon/poly spacers could = solid in some people's opinions.
Do your homologation papers speak of any bracing in the front subframe?
I have some alloy ones here that wes machined up for me but im not sure I want to use them. I dont think the supra really suffers from a lack of roll centre correction in the same way that say Nissan S13s and R32s do but the factory rubber subframe spacers are no good for the track IMO.
I asked John Smith about his subframe arrangement and he said they were "braced and mounted solid" although nylon/poly spacers could = solid in some people's opinions.
Do your homologation papers speak of any bracing in the front subframe?
spiller;1841036 said:
Lol ,I'm surprised that they braced the sub-frame instead of replacing it with a different one ... IMO first of all the design of the diff is wrong ,Toyota took Mercedes differential and possibly with their knowledge (as many other parts on MA70) copied the internals ,but designed their own housing. For group A they changed the housing ,but apparently continued having issues and they made no changes to the sub-frame for the production cars...
No parts in relation to the front subframe in terms of bracing. BTW Bemani performed a lot of testing on the MA70 chassis back in the day (I have pictures somewhere) and determined that the cage must be connected directly to the front subframe. They actually changed the TRD / TTT cage designed a little which was agains the FIA rules ,but they got away with this. They also concluded that the TRD cages were overkill at the back of the car. The net results is that the Bemani cars were faster than the TRD cars on SPA! ... just another proof that the factory sponsored GroupA program was a total failure...
First time attack of the year ,resulted in rather spectacular serpentine belt failure portion of the belt separated and flew off ,passing true the "Race America" hood ducts and hitting my front windshield!)
Here is what what was left of the belt:
Here is the damage of the tensioner ,I'm lucky that I have a "few engines" in my back yard
I actually had this prioblem before ,every time a hit hard two particular curbs on BHF track my belt takes off. The issue is that the stock 1JZ/2JZ power steering pump is supported mostly by a mounting point on the block and on the A/C compressor ,once the A/C is gone the system becomes unstable. I don't know why no one else complains ,but I trued different belt , custom reinforcement to the manifold ,and nothing seems to help. Finally I gave up and was ready to install my A/C unit back on ,when I realized that the stock A/C unit is sandwiched multiPeace and I can just use the mounting bracket ,a few hours later ,problem solved (hopefully forever this time)
A/C onto peaces:
Bracked mounted:
I also got sick of the god damn drain pipe cracking and leaking every year... called my Sales Manager at ATP and requested him to give me the best -10 line that they ever made. $100 later (and this was my wholesale cost!) ,I got new turbo drain line that is defenetly smaller OD than any -10 line I have ever seen. I also routed it this time around in front and used some SS zip ties to keep it away from the manifold:
portion of the belt separated and flew off ,passing true the "Race America" hood ducts and hitting my front windshield!)Here is what what was left of the belt:
Here is the damage of the tensioner ,I'm lucky that I have a "few engines" in my back yard
I actually had this prioblem before ,every time a hit hard two particular curbs on BHF track my belt takes off. The issue is that the stock 1JZ/2JZ power steering pump is supported mostly by a mounting point on the block and on the A/C compressor ,once the A/C is gone the system becomes unstable. I don't know why no one else complains ,but I trued different belt , custom reinforcement to the manifold ,and nothing seems to help. Finally I gave up and was ready to install my A/C unit back on ,when I realized that the stock A/C unit is sandwiched multiPeace and I can just use the mounting bracket ,a few hours later ,problem solved (hopefully forever this time)
A/C onto peaces:
Bracked mounted:
I also got sick of the god damn drain pipe cracking and leaking every year... called my Sales Manager at ATP and requested him to give me the best -10 line that they ever made. $100 later (and this was my wholesale cost!) ,I got new turbo drain line that is defenetly smaller OD than any -10 line I have ever seen. I also routed it this time around in front and used some SS zip ties to keep it away from the manifold:
spiller;1842510 said:
Yeap ,this is DM PS hose. Plan for the future is ,as soon as my PS pump goes again to get rid of it and setup MR2 Spyder hydro/electric pump. A buddy of mine got a controller/emulator ,which means that the power steering amplification can be controlled from the speed sensors or/and Potentiometer. The MR2 Spyder Pump can also be moved further down and much further back
planemos;1842526 said:
I did not know that Toyota has the electric on the steering column setup.I've seen some "race" cars using the Chevy Cobalt electric steering column which is uber cheap ($60 or so on Ebay) ,but I will be somehow afraid to modify the steering my steering column...
LordDigital;1842517 said:Yeap ,this is DM PS hose. Plan for the future is ,as soon as my PS pump goes again to get rid of it and setup MR2 Spyder hydro/electric pump. A buddy of mine got a controller/emulator ,which means that the power steering amplification can be controlled from the speed sensors or/and Potentiometer. The MR2 Spyder Pump can also be moved further down and much further back
it would be cool if you could somehow hook up a dial switch to the electric set up to alter the PS influence for different situations (or is this what your buddy has done?). My pump and rack are rebuilt but the steering is so damn light at times. Ive thought about removing the pump and looping the lines but im not sure thats a good idea on a 3000lbs car haha.
LordDigital;1842550 said:
pretty sure the last yaris I lookrd at did not have a hydro P/S pump on the motor...
belt through the hood vent -- spectacular -- in camera video? other than the loss in P/S an nice warning device --
IE: "your waterpump ins't running and I thought I'd let you know by showing you the belt", -sincerely your supra....
A rare occurrence at today's TimeAttack event - 2 Supras:
MK4 finished 5 of 100 cars and I got 12th place. Here is onBoard of one of my best runs for the day.
[video=youtube;RRCP9XPuLZY]http://www.youtube.com/watch?v=RRCP9XPuLZY&hd=1[/video]
MK4 finished 5 of 100 cars and I got 12th place. Here is onBoard of one of my best runs for the day.
[video=youtube;RRCP9XPuLZY]http://www.youtube.com/watch?v=RRCP9XPuLZY&hd=1[/video]
nice lines mate! seems like you were hardly on WOT at all although its obviously a tight little track. Where abouts is that race track in relation to Chicago?
Honestly that looks like a lot of fun. Your cars sounds great.
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