on my 90 crx i have single cam turbo a6, running 17 psi, t3t4 57 trim turbo.. i have some lag till like 3K rpms but i put my 225 5015 bf drag radials on and they actually slow the car down compared to the stock 13" wheels and street tire, i get less traction with the 13's but its almost worth it cause the 15's take alot of the energy away. i can feel the car is slower with them even though they hook better. so im debating on what to do.. i know someone with 205 50 14 bf drag radials who i could maybe trade but would this cause me the same problem or not really? track opens soon and i gotta figure this out.. car weighs next to nothing fully gutted and frame/other stuff has been lightened alot.. never dynoed but i know its cranking out some decent power .

 

how much power are you making???
it feels slower?? i say its just that fact that your hooking up now...

225x50x15's are 23.9"
215x60x14's are 24"
205x50x15 are 22"

 

ya i did notice a slight power loss also...the things weigh a ton...but in my case the bfgs helped a ton...i actaully had traction and the car moved...unlike when i didnt have tration and basically i was doin rollin burnouts anytime i stepped into boost...the car seems slower because its quieter and doesnt rev up as fast if that makes any sense...

 

deff not over kill what are your 60' times? i think your just hooking now and it seems slower...in reality your getting up the track a lot faster