Singh_snisen

No I'm good. I'm 90% sure il get better times in a 255. I ment 315. 315 is too big for na imo. I'm hesitant to go 265 square on NA.

s2000Junky

Well you need to set up your spring rates for for the added grip, but you wont really know where the diminishing returns are on your car until you try it yourself. So far, on my car I haven't found that threshold with a 275/315 stagger. I used to be at 450whp supercharged and was concerned going back to NA with my old 255/295 set up might be a problem, but was pleasantly surprised after laying down one of the quickest NA/non rear wing street tire times at my 2.5mile track. I added 2lb per tire with the new larger set up and lengthened the gearing slightly with the overall diameter, and again was concerned about bogging the car down, but have found its hardly perceivable, but rather enjoy the slightly longer legs, with the shorter F22 rev band. With the ap1 trans im running, its running the same mph gear spread as the factory ap1/F20 combo, but with a tuned F22 to pull it, it really feels great! The true test will be my return visit to lay times down at the track this summer. Time aside, I love how planted/secure and confident this chassis feels with all the contact patch on the road, and gaining that feel is half the battle in going fast with this nervous little car.

265/40 is a very limited tire size, which means your going to be forced to deviate from your current compound to test it out likely, so i wouldn't likely do it in your case. But if you could move up in size and keep the same compound, then you are now comparing apples to apples.

Singh_snisen

My car has full aero. I wouldn't benefit from a 265/295 setup. I feel it's gananslow the car down a lot. Drove a buddy's S2k with 255/285 (I think) and I can feel the car is down on power. Slaped on my set of 255 square and I was 2 sec faster. Both cars had same tires rs3. Il bite the bullet and prob go for a 265 square for my next setup.

s2000Junky

Well, the wing is an added variable I dont have, and if you are already pushing the threshold of the motor in the track config you are running, then i could see the net times possibly being down some as a result, although i dont see 10-20mm of added contact patch really providing enough added drag on the motor in itself to suffer that much. I could however see a gearing change as a result of a larger overall diameter tire along with width effecting times negatively if you are already pushing that threshold with all your aero. Times dont lie though, so if your dragging ass down a long strait and cant make it up in the corners, then it aint working, do what works for you. Just dont get hung up on that as gospel for every set up and track/environment, or you may be missing out. Its a tendency I see a lot of people make, one fast guy makes a claim in a particular scenario, and next thing you know a lineage of thinking starts to develop in a hard line fact from others who are too afraid to test for themselves. I like experimenting for myself anyway, its more fun. Especially when it works out in my favor, and for the most part it does for me which is why i keep doing it.

Singh_snisen

Ya I get it. Trust me if it's anyone doing stuff different from the norm it's me lol. But ya the buddies car was dynod at 245whp and mine has never seen the rollers. I had higher trap speed aswell and my aero package is greater. I will definitely try a bigger size than a 255 now. Maybe 255/275? Also want to try the RC1.

s2000Junky

Don't ask me if you should move to a 275 in the rear. Your running a square set up, so I assume you have the suspension dialed in along with your aero to make it feel balanced, and you must have decided a non stag was best for you or you wouldn't have done it. If you are still too over steer prone, then you probably would benefit from adding 20mm more rubber in the rear, but keep in mind its also a taller tire which means your brake bias is going to shift further to the front (which isn't necessarily a bad thing for stability overall) but it should be kept in mind if you need to make any suspension adjustments, along with the gearing change that taller tire will net. From what ive gathered so far, your already pushing the threshold of diminishing returns with your down force, so a taller tire/gearing may hurt you depending the track layout. Id be more opt to recommend moving to an 18" wheel and a 285/30 to slightly drop the gearing with the added section width, or do the 295/30 to run the same as your current 255/40 overall diameter.

Singh_snisen

I'm definitely not looking on going to an 18 wheel. I have 100% confirmation on the track I run on a na S2k 18s are slower pierod. This year is test and tune for my car. Got new aero, new tire setup and compound, new coils , new seat etc. I'm just tryna have fun and keep it friendly. Until I plan on going FI il stay conservative and try to improve my times and skills. 200whp is a lot to me lol.

s2000Junky

Nothing wrong with that at all if thats where you are at. Many put all their credence in the parts list and discount the driver mod aspect to this deal. Fun is the main thing anyway, little point in doing if its solely ego based.

I really enjoy the art of driving and pushing/finding the limits of the equipment/sum of parts that make the vehicle, and then making equipment improvements to increase that performance threshold and further testing my limits and net effect of improving my skill, track times and get my adrenaline/thrill fix. Its a addicting love affair. I also enjoy just the bonding of this car for the last 13 years ive owned it and all the great street miles/road trips ive done with it. My goal was to build my version of the highest performing level dual duty track/street car.

s2000Junky

I think this thread has "officially been pimped" ... I mean derailed