Good **** boys!!

 

brakes working well. we went with the evox front setup. that combined with our weight reduction is working in our favor. now that we are in TT we'll focus on getting a couple warmup laps then throwing in a couple hot laps. The brakes should be good for that use scenario. If we decided to jump into the WTW racing brake ducts will be needed

 

do you have reflash ACD ecu? that along with TRE rear diff makes my car rotate very well on throttle. how much difference of the grip level between hill climb street vs track surface. does that effect your setup at all from one to the other.

 

we have 6 different tunes for the acd. i helped matt develop some of the acd-tuning tunes back in the day so 3 are off the shelf, 2 are tweaked versions, and 1 was a custom super aggressive setup.

the track surface is so much grippier. we will probably bump up spring rates for the track eventually. for now im just concerned with balance.

 

I dislike the TRE diff on everything except on-power oversteer. I am currently loading a custom tuned OSgiken into a third member for some back to back testing.

We had to make the front of the car far too soft/rear too aggressive to get the car to turn in well with the TRE. Unless the rear inside is basically in the air then the car doesn't want to turn.

Zack

 

Are you running a 1 way TRE Diff?

 

well there's good news, based on corner weights you want the inside rear to lift off the ground when turning to equalize the heat input into the tires. keeping the inside rear on the ground is a waste of time.

 

this.

 

I am always trying to completely unload but still have it touching or within .5" to the ground. There is no reason for it to pull any higher than this. At that point all your doing is sacrificing front camber since the car is already fully weight transferred. Our car is also already 4% better balance than a normal evo and its getting better all the time.


Zack

 

Can you elaborate on this some? I can't imagine how this would cause more equal heating of the tires. The outside tire has basically the same load whether the inside rear is 1mm up or 25mm.

****i guess if your counting the un-sprung mass as a bob-weight, I can see a marginal difference*****

Zack

 

You're at 60% now correct? Iirc my car was 61%ish when it was stock.

At one point last year this car was 58-59%. We spend all winter speculating what the bias would be after removing over 50-60lbs off the front of the car .... only tot scale it and have it worse than before! Haha

I took it as long as the inside is off of the ground. Agreed that it should be as little as possible.

 

I was comparing to most Autox evo's that have primarily rear weight reduction, I have seen them as high as the 63% range.

I'm glad we agree on the inside rear, It should be fully unloaded. We run it so the car has it off the ground just slightly at entry and then is usually in very light contact once it settles in.

Zack

 

^this. it seems like we all agree but now I'm confused why the diff didn't work?

my problem with the TRE is the lack of preload. a 1way with 85+ ft-lbs of preload is my favorite so far. YMMV.

 

I will have to pull it apart now and verify whether or not it is a 1way. Our feels like it has a very high pre-load. Unfortunately I did not purchase the differential so I am not 100% on how it was setup.

I have a second differential case coming so I can do some testing with both, I will pop it out and look it over at that time.

Back to on topic, Hillclimb, evo, cool stuff, GO!

Zack

 

we have a couple build diffs from jon and have been running them as delivered from TRE and love the way they feel in the car. but we are not autox these days and the steady state highspeed stuff requires a different setup (imo)