Track forum general chit chat.

[Grillpt]

The 720 chucked on everyone I know that ran them. Hopefully they fixed that in the 730.
Can't beat the price, unless they only last a few sessions, like the 720

[Kelse92]

I personally wouldn’t use the V730’s on an e9x. For a tire with “7/32” tread on the center the shoulders are very shallow and that tire looks like a slick after 2 track days on a non-heavy car. I can imagine it would evaporate on an e9x but I’d love for someone to test and find out!
They seem to do better with heat than a few of the other 200tw competitors that aren’t geared towards endurance.

[omgzirra_exe]

honestly V730 (ACR version) at less than 770 for a set... me no complain.. but i just hate that its TOOO narrow.

[k_mann]

Success! Took too long between failures and powder coating but it's finally ready to go in

[roastbeef]

Punch some holes in it while it's out.

[k_mann]

Originally Posted by roastbeef

Punch some holes in it while it's out.

Don't worry adding beef holes to the diff as we speak

[Bartledoo]

So I tested the Conti Force tires today. Impressive tires! Showed almost no wear for the day, and were only around 1.5sec slower than same sized A052 with both being driven time attack style (1 lap) in similar cold conditions (on a 1:4X per lap track with 16 turns [The Ridge Motorsports Park]). Easier to drive than the A052, and pretty good consistency when driven lap after lap too, where the A052 just overheat and die. Not the same as 1st lap pace, but not super far off either.

[b4hand]

Originally Posted by Bartledoo

So I tested the Conti Force tires today. Impressive tires! Showed almost no wear for the day, and were only around 1.5sec slower than same sized A052 with both being driven time attack style (1 lap) in similar cold conditions (on a 1:4X per lap track with 16 turns [The Ridge Motorsports Park]). Easier to drive than the A052, and pretty good consistency when driven lap after lap too, where the A052 just overheat and die. Not the same as 1st lap pace, but not super far off either.

How many sessions/laps?

[derbo]

Originally Posted by Bartledoo

So I tested the Conti Force tires today. Impressive tires! Showed almost no wear for the day, and were only around 1.5sec slower than same sized A052 with both being driven time attack style (1 lap) in similar cold conditions (on a 1:4X per lap track with 16 turns [The Ridge Motorsports Park]). Easier to drive than the A052, and pretty good consistency when driven lap after lap too, where the A052 just overheat and die. Not the same as 1st lap pace, but not super far off either.

That's what I've been hearing too. Local shop said a customer took out their car to Laguna seca for double stint sessions and the tires look like they didn't wear at all. This is a great contender for a RS4 competitor. RS4 is $280 for 275, and ECF is $325 at the moment.

[Bartledoo]

Originally Posted by b4hand

How many sessions/laps?

5x15 minute sessions. I should’ve run the full 7 x 20 and taken tread depth measurements before and after, but it’s hard with a student and the social scene. I imagine these will HC out before the tread is gone in HPDE use anyways.

Originally Posted by derbo

That's what I've been hearing too. Local shop said a customer took out their car to Laguna seca for double stint sessions and the tires look like they didn't wear at all. This is a great contender for a RS4 competitor. RS4 is $280 for 275, and ECF is $325 at the moment.

Definitely is. I’d take the ECF over the RS4. I’d like to test the ECF vs RS4 in hot conditions (so not in my region lol). I just can’t imagine the ECF would take heat quite as well as the RS4 given the difference in warmup time between the two, but maybe hoosier really did magic. I’m no tire scientist either…

[Bimmer Barney]

Had a great Saturday at Laguna with Speed District and I was definitely the least expensive car there! (it was a 105dB day).

I was targeting a 1:42.9 having previously had a 1:45.8 best in my E90M. Since last round I changed to 200TW tires, bigger rotors and brake cooling ducting, and an Alpine Tune. Really thought it was in reach given a couple upgrades and another day under my belt.

Well I did a 1:45.1 and set a new top speed of 126.8. I'm happy about that.

I was a little bummed to not be close yet to the 1:42's but I'll get there eventually. I think my next step is coaching.

The car was so much easier to drive to that 1:45.1 vs my previous 1:45.8 which was overdriving. And the brakes felt amazing lap after lap. My head wasn't in it to find the edges this go around which was sort of a first; I usually send it.

The day was amazing. 17 cars in our group and I did 80 laps. In my group it was mostly GT3RS' and a couple McLaren's. My buddy who used to have the E90M like me had his new car, an 18 Carrera S. He did a 1:40 flat and he was typically a second slower than me in the M just for reference. Last time out I spun 3 times and this time not once.

[slcook54]

Originally Posted by Bimmer Barney

Had a great Saturday at Laguna with Speed District and I was definitely the least expensive car there! (it was a 105dB day).

I was targeting a 1:42.9 having previously had a 1:45.8 best in my E90M. Since last round I changed to 200TW tires, bigger rotors and brake cooling ducting, and an Alpine Tune. Really thought it was in reach given a couple upgrades and another day under my belt.

Well I did a 1:45.1 and set a new top speed of 126.8. I'm happy about that.

I was a little bummed to not be close yet to the 1:42's but I'll get there eventually. I think my next step is coaching.

The car was so much easier to drive to that 1:45.1 vs my previous 1:45.8 which was overdriving. And the brakes felt amazing lap after lap. My head wasn't in it to find the edges this go around which was sort of a first; I usually send it.

The day was amazing. 17 cars in our group and I did 80 laps. In my group it was mostly GT3RS' and a couple McLaren's. My buddy who used to have the E90M like me had his new car, an 18 Carrera S. He did a 1:40 flat and he was typically a second slower than me in the M just for reference. Last time out I spun 3 times and this time not once.

I wouldn't be bummed. I don't know your car setup or driving experience but I'm running 1.44.1 at Laguna in my e92 with AP Brakes and Ohlins, square 275 PS4S. My virtual best is a 1.42.7. Assuming you're full weight, that's a solid starting point. I might squeeze in a day with NCRC this upcoming Monday if I can sort out a couple of things. Hoping to crack a 1.43.

[Bimmer Barney]

Needed you out there to help me! One bummer with having all the other cars be in such a different league was missing out on tailing someone slightly faster to get the tow by way of watching lines. I have Front BBK, race pads, solid rear subframe bushings, and a tune on EC-7/275 square. Otherwise stock ZCP.

My virtual best is a 1:44.18 at the moment on HLT.

OH AND A MOMENT OF VALIDATION: a new TTRS sheered a lug and wrecked in turn 6. In the pits he said he just got new wheels and never checked the lug torque after install so all you torque-check-between-session naysayers: ye be warned!

Then on the way out for the day I saw him on the side of the road, tire stuffed in the fender. Yes, he tried to drive on it with 4 lugs, when he knew the hub was damaged, he knew is caliper was jacked, and his wheel possibly cracked. Darwin's Law at its best.

[slcook54]

Originally Posted by Bimmer Barney

Front BBK, race pads, solid rear subframe bushings, and a tune on EC-7/275 square. Otherwise stock ZCP.

My virtual best is a 1:44.18 at the moment.



OH AND A MOMENT OF VALIDATION: a new TTRS sheered a lug and wrecked in turn 6. In the pits he said he just got new wheels and never checked the lug torque after install so all you torque-check-between-session naysayers: ye be warned!

Then on the way out for the day I saw him on the side of the road, tire stuffed in the fender. Yes, he tried to drive on it with 4 lugs, when he knew the hub was damaged, he knew is caliper was jacked, and his wheel possibly cracked. Darwin's Law at its best.

Our cars are 10+ years old now too. At dogbone 's recommendation, I swapped to 14mm pressed in msi studs, f80 hubs and new bearings from Core4 gills

[omgzirra_exe]

Originally Posted by slcook54

Our cars are 10+ years old now too. At dogbone 's recommendation, I swapped to 14mm pressed in msi studs, f80 hubs and new bearings from Core4 gills

CORE4 is something every one us of who track should have

/end

[Davisca455]

Originally Posted by Bimmer Barney

OH AND A MOMENT OF VALIDATION: a new TTRS sheered a lug and wrecked in turn 6. In the pits he said he just got new wheels and never checked the lug torque after install so all you torque-check-between-session naysayers: ye be warned!

I used to check lug torque prior to every session, but for my first 5 events I don't recall ever getting any movement.

So for the last 5 events, I reduced to checking in the three morning sessions, still never got any movement.

Pulled into Sears Point last weekend, unloaded the car, installed the new wheels/tires, torqued to 88ft lbs, went out for session 1, got in maybe half a session (lots of folks spinning in the morning, ugh).
Checked the lug torque prior to session 2….almost all of them had slightly loosened.

So, now I'm back to checking prior to every session.
It just doesn't take that long to do it.

[Ximian]

I'm still on lug bolts. If any of mine become a bit loose after a session, I'm calling it a day until I can figure out why and fix it.

[omgzirra_exe]

Originally Posted by Ximian

I'm still on lug bolts. If any of mine become a bit loose after a session, I'm calling it a day until I can figure out why and fix it.

its more just how metals react. sometimes you might have some corrosion between the hub and the mounting pad of the wheel, then over time that rust gets removed from vibration and movement, then it just happens to now be a .1-.2mm gap between the hub and wheel thus is enough room for the lugs to start backing out. that's why i always suggest whenever you remove your wheels, clean the hub/lug area.

[roastbeef]

there was a very informative thread with a rep from MSI about this stuff and i can't seem to find it.

[Davisca455]

Originally Posted by Ximian

I'm still on lug bolts. If any of mine become a bit loose after a session, I'm calling it a day until I can figure out why and fix it.

I'm on lug bolts as well.

After I re-torqued them prior to session 2, they didn't move again the rest of the day.

My theory was that the machined cone on the brand new wheels didn't perfectly fit the cone shape of the lug bolts.
That the cone to cone interface was fretting when everything got hot and the bolts lost a little preload?

[admranger]

If you trailer, check your lug nuts before each leg of the trip. This is especially important if you have aluminum wheels. I might know a guy that had a wheel come off going up the Tehachapi grade. Made for an interesting evening.

[M eyedoc]

As someone who drives to the track and changes tires for the track, I switch out lug bolts to match the track spacers on a regular basis. I replace the bolts every other year, and replace the baring hub every few years as preventive maintenence. Figure the expense is good insurance. And yes, checking torque is an easy habit to check before going out.