Help with Tire Selection
 

I ran 345/30r19 Nitto NT05R and never had issues. It would dead hook a 40 roll in first(536rwhp). Got caught in the rain and just drove cautiously. The sidewall is decent and isn’t as bad as some say in the corners. If you care a bit more about handling I would go with th R888. If not the NT05R does great in straight line. I would just be cautious with driving at freeway speeds in the rain.

Go with the M PSS in either 325 or 345/30-19, (or the new PS4S in the 325) far better grip than the Invos and you will get good tread wear and they are reasonably quiet and have a good ride. The R888Rs will have much more grip, will have more noise and will wear out in 1/3rd the time of the Invos or PSS. The R88Rs are street legal track tires. I have run R888s 100+ miles OW to road circuits and run them, then home. They will hook much better than the PSS, but I don't think that is the highest on your overall priorities. My HCI car is ~ 600 rwhp. PSS on the street and high speed events, R888s (have rear R888Rs waiting for mounting) for road courses and MT ET STT for 1/2 mile or less drags. I'd get NT05Rs for the drags rather than the MTs next time as the MTs get squirelly at about 140.

The Invos are a good treadwear, quiet, soft riding, inexpensive tire, they are not a performance tire.

The NT05 is the Nitto street performance tire regardless of what Nitto advertises, the Invo as. My NT-05s generated .93 and .97 on a couple of my local roundabouts.

My PSS were 1.12Gs on both. They have good grip especially when its 70*+ outside. Like any summer only tire they lose a lot of grip when it gets down into the 40s.

With ~550 rwhp, only drag radials will dead hook in a straight line although DOT street legal track tires like the R888R and the Mich. Pilot Sport Cup2 tires will hook better. than street tires once warmed up. The tradeoff there is you will be lucky to get 10K miles of treadwear on the DOT track tires.

If you are not doing track events, I'd recommend a street alignment of -0.7* camber front and -0.5* rear, with just a little toe-in front and back. With those settings you will still have very good street cornering and will get very good tread life.

I (560whp) replaced Invos with MPSS. MPSS will not hook 1st gear but still alot better than POS Invos. I plan on getting R888R soon.

I'm running -0.9* camber front and -0.6* camber rear and near zero toe front and rear. Car handles great in the corners and runs straight and true at 160+ MPH.

With those alignment specs I have ~40,000 miles on my Bridgestone RE0505A run flats, with ~3/32" tread left. They are a great tire(much better than the OE Goodyears), but not a drag radial. They hook pretty good when the temp is above 80*, but I don't recommend them for stoplight drag racing.

I have the MPSS on my stock Z and they have been TERRIBLE for me. They are not even two years old and I can blow them off from 40-60mph roll in 2nd. It is worse when under 70 degrees but I haven't had any luck getting good traction above that temp either. The rear steps out with any throttle while hanging curves. They have been flat out dangerous in my application. To be fair though, I haven't had my alignment checked yet. Now they may do better when heated during a long session of track racing but I haven't been in that environment and it doesn't sound like you will be either. My goals are similar to yours and from the research I have done the R888r is what I am leaning toward. Good luck in your search.

MPSS are not a track tire although if just doing a couple of HPDEs per year and as the only wheels/tires they would be OK. The R888Rs are track tires, they will have a lot more grip than the PSS and you will be happy if you get 10K street miles out of them, whereas with a good alignment the MPSS should get 25-30K street miles even with a couple of track days. If someone only drives 2-3K miles per year then the 10K wearout isn't so bad. I do ~7K per year and wouldn't want to be replacing my street tires every 16 months.

With normal alignment in a long corner on track the PSS will understeer with stock suspension, of course hit is hard and you can drift with even stock power levels. If you get throttle oversteer then you are either too hard on the throttle tip in or your alignment may be off.

r888r lover here.... coming from Michelin pilot sports on my H/C car it was a night and day difference....888rs just stick waay better and 1st gear is actually usuable now as where before with the Michelins I couldn't use 1st or 2nd gear in any sort of aggressive manner....I don't notice any excess noise from the tires cuz my cars on the loud side....the cars not a daily so if I could get a good 8k miles out of them I think it's well worth it.... there's nothing like the feeling of having a good tire on the car that u know can handle what u can throw at it.

Yes. I need to have the alignment checked. It happens with very light and smooth throttle tip in but it has always been controlled drift.

This is what I am looking for. My reasoning is that I only drive 5k/yr and the rubber seems to harden after a few years anyway and the only reason I would ever be in the rain is if I get caught in a pop up storm. The MPSS tires aren't cutting it for me. There is nothing worse than a high school kid in his Mustang hanging close from a red light because you can't hook. :lol:

I stay with the OEM 18/19 sizes because I do high speed events (have over 800 miles at 150+ MPH) and don't want any rubbing. The 325s would actually be slightly better in a straight line, 345s in the corners if you upsized the fronts also. I think you want good performance and value, go with the 325s.

MPSS for me. Good tire. Does wonders when it's warm .

19/20 tire choices are even more limited than for the 18/19 combo.

I have no experience with them and do not remember reading any reviews on them.