Thread: did the tire diameter make such diff on MPH??

Ok heres my question i just arrived from the track my specifications are this:
B13 Stock Internal VE
SR16 Trans
Gspec pulley
Stock SE-R 14" Rims with 185/60R14 tires
engine rated at 177WHP and 138TQ

my better numbers before the tranny change and the dyno setting where between 14.6 to 14.5 @95 or 96.

Now almost all people said that with the SR16 tranny i should be gaining MPH on the track but i'm experiencing the opposite.

Today i just arrived and the first run where 14.4@95 and another one of 14.3@94 and then all over the night my runs where of 14.3@95 mph constantly with tires set to 15psi and awful threadwear over 400...lol. But after leaving the track i added the air to the tires and did a last ride and my numbers where 14.5@96.8 almost 97 with tires at 30psi of course the tire spin where huge.

Also i notice that the track reading gave me from 94 to 96 and all my passes i was seeing on the speedometer just when i hit the light a 100MPH reading... is the Speedometer that WAY OFF reading??...

Thanks any advice is welcome!

I don't think the tire dia will change by putting more pressure on the tires, When you go back to the track try them at 19-21, I would say 15psi for a normal tire isn't helping you out, they aren't desing to work like that... Nice number Btw....

Sigue mejorando, ya bajo tiempo con la transmision asi que hay mejora... Unos palitos SR16 a ver si mejora mas.. Suerte

Thanks macakin but i'm not going anymore until i find some good tires mines are... well ugly, crappy...lol don't even cristal tire shine stick to them...lol. A friend offered some konig 15 ultralight with some toyos RA1 205/50R15 so if i can borrow them soon i will try those .

y tu q esperas pa engancharle una SR16 a tu carro pa q veas lo q es bueno esos tiempos tuyos van a bajar como loko con esa transmision.

jolo if you dont get the konig/toyoss a friend of mine is selling 2 nitto drags 14 good tires nd nex time gutt you car a lil bit.

Aki la compe esta ultra light jaja

El diametro si afecta en mph pero no creo que eso sea en tu caso, no se, mijo por lo menos sacale algo y bajale algunas libras a ese chasis tan virgen, no seas hondistico q eso seria una pena mutilar ese carro.

you are getting too much tread squirm. Raising the pressure on your tires reduces rolling resistance. That's why you're faster.

jaaa yo ese dia solo le saque los asientos de atras y todo lo del baul (respuesta, gato, etc.)

that day i just removed the rear seats, spare tire, lifter, etc. Loosing some weight. I will try new numbers when i find some good tires and try 15" rims...

jaha LOL!!!! ! !! ! that a good one I'll sell you my BF Drag Radials let me know.

thats funny but watch your language i never mentioned your mother in this thread so keep mine out of yours. Got it BITCH!