is there any difference in performance between JDM and USDM models if both 255hp models compared. Different sources list different specs. some say 13.5 second 1/4 mile time for JDM version which is lighter as far as i know.

Also how much WHP is necessary to brake into 12s on FD?

 

This subject has been covered numeriously i would try the search button but they are different not much though.

P.S. You Stole My Avatar, Thief

 

it depends on the driver really there is a guy that said he ran 12.5 with 260WHP and i have 260 whell horsepower and i ran a 13.2 so its really up to the driver. Also the fastest stock rx7 quarter that i have ever heard of was a 13.3

 

A quarter mile time also depends on how well you set up the car. If a FD with a stock motor hooks up the tires without spinning it will be faster. If you have a FD that spins down the track your e/t will suffer.

 

I know later fds have a 4.33 gear ratio in Japan and that will translate to a different ET.

 

i tried search but there was no thred about 1/4 mile time differences between these two.
and dude i didnt steal your avatar, i made it myself from the original picture. if you look carefully you will see that

zack4173
drivetrain loss on FD is about 18% right? 211whp stock right?

 

the jdm version is lighter and also produces more horsepower due to its lack of a precat. and if you want to be realistic most jdm fd's have been modded with a catback exhaust as well which helps increase hp, and larger 17" wheels which generally helps at the drag strip but doesn't hurt it too much at autocross.

damn i just realized i bumped this months old thread. i suxor

 

are you sure JDM doesnt have precat? both models have 255hp until 97 when 265hp models appeared in japan

 

JMD = 13.5 1/4
USD = 14.2 1/4

I think... its something on the lines of that... my FD is stock besides exhaust and to be honest, I think mine will get mid 12's to high 12's.. i've driven other FD's and none go as good as mine..? Funny, I know...

Dennis,

 

^^^ I have JMD engine etc...

 

5th gear is shorter. maybe its taller? but either way the rpms are higher in 5th in the j-spec car.

 

I have a r1 with intake, turbo back and bov, pfc (base map), stock boost, shock/spring combo from stillen and I ran 12.6 on 555r, and 12.3 on slick letting off during competition. I think I can run 12.1 at the very least (1.8 v. 1.6 60ft), so 12.0 is possible for me. Im going to wait until jan comes around for another event.

 

trsilvias13
how much WHP do you have approximately? 260?