Izzone

rad check email

nick session is last of the day saturday, he forgot a SD card

mine is second on sunday

NJ-GT

Confirmed, GT3 3.8 beats the RS 3.8 out of T7, it gains 0.35 secs over the RS in a small segment of 0.3 miles between entry to T7 and exit of T8.

The RS puts a 0.1 secs (average advantage) at Bishop bend over the 3.8, it is not that much of an advantage as I was expecting. Nick seems to be using 2nd gear out of T13, because he enters Bishop bend almost 3mph higher compared to the RS 3.8, but the RS gets some of that speed back during Bishop reaching 2mph higher speeds, but the segment difference is too small.

Top Speed between T16 and T17 shows the 3.8 GT3 with a 1.5mph higher speed than the 3.8 GT3 RS.

Here is an interesting fact. I placed a drag race segment between T16 and T17, where the cars are not turning and not braking, just full gas. In this segment, every single lap from the Greek (GT3 3.8) beats Izzone's best (GT3 RS) on segment time (average 0.16 secs) and top speed.

The RS has better acceleration between 100mph and 125mph.

Out of T7, the difference in acceleration puts the 3.8 GT3 with an equivalent 40Hp more horsepower than the 3.8 GT3 RS. I'm using both cars at 3,350 weight and the correct gearing and tire information.

The TBL difference is just 0.165 secs with advantage RS, 2:20.90 vs. 2:21.155.

Biggest RS advantage is the segment that includes entry to T3, T4, T5 and T6, the RS gets 0.45 secs difference over the GT3 in just a little over 1/2 mile (0.6 miles). Nick seems to be using 2nd on T5, as it shows better acceleration, and once again a difference of about 30 Hp. This segment is proof that the RS 3.8 is a better autocross car, because it doesn't accelerate as good as the GT3, and still beats the GT3 in time by 0.45 secs. Revealing.

Veloce Raptor

Rad, with all due respect, this is a totally facile comparison. Different cars, different drivers, on different days? Come on. The only reasonably credible comparison would be the same driver. Put Randy in both cars, for example, THEN you can compare data. Driver style, technique, PSM on or off, TC on or off, etc makes a HUGE difference.

Mvez

You just described the NT01, except the expensive part. Can be driven to the track, just as fast (or faster) than every tire you just described. Why aren't you running 18" NT01's (245/275) for the Cayman?

MPSC like heat, plain and simple....too fickle and too expensive IMO.

If they offered NT01 in optimal 18" sizes for the GT3/RS crowd, everybody who runs RA1's would pick up 1-1.5 seconds with their eyes closed. Most underrated track tire out there. There's a reason they can't ever seem to keep up with the 275-35-18 demand every track season...

NJ-GT

Agree, best way to do it is with a group of good drivers, driving each car same day and same conditions.

I'm anyway impressed with the acceleration in the standard GT3, Nick reached 146 mph before T17 a few times, which is very close to my top speeds last month with the Scuderia on slicks at 149-151 mph.

Veloce Raptor

These guys all have varying levels of disclosed & undisclosed mods to these cars.

Or...he's just carrying more speed into & out of T16 than Randy.

Either way, I don't think either of their respective data has any bearing on which car is in the abstract quicker at Sebring.

deputydog95

They work...

I know of 3 people, one personally, who ran them on 997 GT3's with no issues related to ABS. I'm switching after my remaining set of hoosiers are done.

Apparently the revs per mile is within the 5% margin, despite the height difference between that and stock. In a perfect world, they would have that 305 rear, but the 315/245 does work.

wanna911

NT-01 are not as fast as MPSC (not the N-spec ones).

I highly doubt they are faster than shaved RA-1's either, though I can only confirm the first part as I've tested them back to back. There are regular street tires within 1-1.5 seconds of NT-01's.

Veloce Raptor

Dez, properly broken in NT01's are as fast as shaved RA1's. They are in essence the same tire.

wanna911

I didn't know that, I thought shaved RA-1 were closer to R6 level and on par with MPSC. I thought the NT-01 was somewhere in between the RA-1 and R888.

What do you think about the NT-01 in relation to non- N-Spec MPSC?

Veloce Raptor

I think the MPSC works really well on some cars but not on others, and I don't know why. Anecdotally, it seems (to me) that they work well on relatively stiff cars with stiffer suspension packages, on relatively grippy tracks. For example, I rode in a fully prepared 993 at Wattkins Glen recently, on a very cool blustery dayy, on MPSC's. After one lap they were fantastic, and very consistent, despite the ambient temps. I have also ridden in and driiven GT3's where they also can work well. But in other cases they suck. And Mdrums also seems to hhave had that sucky experience last weekend with his relativelyy softer car on a slippery Sebring.

So I am having a difficult time answering your question, simply because my MPSC experiences have been all over the map, whereas NT01's, properly broken in & worn down a bit/shaved, have been fantastic.

AudiOn19s

I'm with Dave here. Once the tread is gone on the RA-1 and NT-01 it's basically the same tire. Not as fast as a R6 or the "real" MPSC's

I ran Cup's all last year on my car. They are a finiky tire but when they are right they are the fastest treaded tire I've ever driven. Even in small 235/295 size they were amazing. But anything less than ideal conditions and they were miserable.

I switched to Nitto's. My only complaint is I got one of the tires hot in a 30 min session and kept going not knowing it was coming apart as a result. Pretty much killed that one tire in 8 heat cycles which I was not expecting. Not sure if it was because it was still pretty new or me playing with pressures or what. The other 3 are still ok. I'm thinking my next set I might shave even though they only start at 6/32. What I do know is that my comfort level with the car grew more in 3 days on Nitto's than all of last year going through 2 sets of cups.

The Greek

Dez, Stick with your tires. We dont need you going any faster. I already have to deal with Jenks catching up....

M3EvoBR

My experience with MPSC is very limited. I drove in Sebring last November I believe, tire had a lot of street miles, and they were roughly 2-3 seconds slower than RA-1s, but again, a lot of street miles. Couldn't stop the car, and tires were really edgy.

Veloce Raptor

Yah, when they work, they work great. When they don't, they truly suck. No in-between, it seems..