1300 Kg Track SUPRA project

A70nut

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I bet the handling is amazing with such a low set and short engine! That's one reason I'd love to do a 1uz build, to get some of the weight off of in front of the front wheels. I bet a front mid engined supra would feel awesome!
 

josbeat

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The Supra Mk3 is a car that looks much better in live than in photos but with those fender flares mine looks same in photos that in live. Expectacular! :)
IMG-20200105-WA0000.jpeg
 

josbeat

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The front flares are not finished. Soon a photo with the splitter fitted and matched with the flares
 

Piratetip

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Very nice!

Hey josbeat.
I see you have one of those EU style rear diff covers.

You have any extras? or know of any used differentials you could pull one off in your area?

I have always wanted to get my hands on one of those....

Also do you monitor the differential temperature during racing?
Curious how hot the oil it gets.
 

josbeat

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Very nice!

Hey josbeat.
I see you have one of those EU style rear diff covers.

You have any extras? or know of any used differentials you could pull one off in your area?

I have always wanted to get my hands on one of those....

Also do you monitor the differential temperature during racing?
Curious how hot the oil it gets.
Hi!
Maybe you are thinking that I have one of those rear diff with a cooler included?
Mine don't have the cooler.
The temperature always stay in between 90~100 Celsius degrees.
With 75w140 oil and a TRD diff.
 

Piratetip

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@josbeat
You have the rear cover that extends out beyond the side of the diff.
I recognized it from your photos there.

I don't want the cast iron case with that vertical tube and cooling fins near the front, just the larger rear cover.
In the states we were never able to get the larger rear cover, it wasn't offered here.

Here are the photos that compare the 2 styles.
EU Cover


States Cover
 
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Piratetip

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Also the work on your supra looks very very nice!

Are you using a helmet that will accept one of those ventilation tubes?

And
Did you fill the chassis hollow sections with structural foam?

How is the chassis rigidity?
What modifications have you performed to improve it?
 

josbeat

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Also the work on your supra looks very very nice!

Are you using a helmet that will accept one of those ventilation tubes?

And
Did you fill the chassis hollow sections with structural foam?

How is the chassis rigidity?
What modifications have you performed to improve it?
Well I never know about the differences of rear covers.
I have a spare diff in my workshop. I will see what cover it have.
The chasis is not filled with foam, I am happy with the rigidity of the chassis that's the reason I am using the Mk3. is a chassis to hold 1500 kg and now it have 1150kg so...
What I did is the rollcage plus front and rear tower bars, front have a connection with the firewall and I have the crossmembers bolted to the chassis with out rubbers.
Nop! Those rear pipes are the cooling lines to the rear mounted oil coolers.
My helmet is an open face used on rallys. What I did is to fit a funnel in the square hole used by the removed heater to collect air from outside on the right corner and route a pipe to near the steering wheel to blow air directly to my face when driving jeje! And also ventilations holes at the rear hatch window and a small window on both doors.

I know that I have not welded the front of the cage to the A pillars and it is an important thing to do that I will try to do soon, also to the B pillars is recomendable.
 

Piratetip

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Very nice!

Ok, I just noticed a lot of spray in foam, just curious what you used that for.

If you are able to find one of those style diff covers I would be interested in getting it from you.
Let me know! :)
 

josbeat

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Very nice!

Ok, I just noticed a lot of spray in foam, just curious what you used that for.

If you are able to find one of those style diff covers I would be interested in getting it from you.
Let me know! :)
OK I have filled the space between the rear towers but it is to isolate the back of the fuel tank space where it is now inside where the rear seat was. It is in case of fuel leak.
Also now I have some foam inside the rear wheel fenders to seal the cuts I did to fit the fender flares.
 

Piratetip

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Ah ok. That makes sense then. :)
 

josbeat

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IMG-20200209-WA0012.jpg
No words.
I like it a lot.
Next month first test at the circuit but... It drives like a...
No idea, don't know what compare with it.
It have a custom made suspension shocks made for me and a custom suspension arms and hubs mixing one existing drift front arms for our Supras and an aluminium hubs for Miatas , plus bolting the rear subframe directly with out any spacers, plus modificating the rear arms pin position, plus lowering and moving back the engine position, plus a different gearbox ratios, plus.... 706 HP
Many things to test at the same time an a miracle that all work like a dream.
Super Happy!
Most probably I will stop here.
 

Piratetip

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Sounds like a blast.
I bet the handing characteristics inspire a lot of confidence while on the track.
Consistent predicability and confidence to push the handing to the edge of grip.