If a stock Itr is around 14.5-7 in a straight line. How much would a 4.785 lower this time as well as the Ats fd?

I think this was discussed awhile back, any new input?

Like people who have upgraded and have first hand experience?

 

from what I have seen the ATS 4.9 has slowed many cars down in the 1/4

 

What's wrong with 4.40 FD?

 

You won't benefit much with a bigger FD in 1/4 mile. The FD will increase acceleration which more harder to hook up when you launch.

FD is an idea to give better acceleration during exiting corners and ON/OFF throttle response.

 

tell that to all the RWD V8s that lower their gear ratio.

 

How bad will the ats slow you down?

 

You must not understand weight transfer very well do you?

Free Lesson of the Night - RWD vehicles LOVE having more and more and more power to push... when the weight transfers to the rear... their traction seems to still exist. Unlike FWD, when the weight transfers our tractions seems to diminish.

Understood?

 

in order to get a good launch you would need a 2.5 1st gear and some sticky meats!

 

It also affects which gear you end up in at the end of the 1/4. That extra 3-4 shift can cost you time.

 

 

explain that please

 

My 1/4 mile times droped by 1/2 a second in the 1/4 mile with the instalation of an ACT clutch, JDM final drive, TODA flywheel, and a C's short shifter. Not sure exactly which of these mods has had the biggest effect on that but the car revs a hell of a lot faster, and pulls harder in all gears than before, and if you can shift somewhat fast you really won't lose that much time from the 3 to 4 shift. As for the launch, in my own personal experience all you have to do is lower your RPM's a little bit from where you would normally launch at with a stock set of gears. If you used to lauch somwhere between 4500 and 5500 rpm's all you have to do is launch somwhere between 3000 and 4000 rpm's. Just my 2 cent's and what has worked for me.

 

typer694, which act clutch are you using?

actually, what clutch or flywheel would you guys recommend with JDM or ATS FD? is upgrading clutch & flywheel necessary?


[Modified by SamC, 9:19 AM 4/11/2002]

 

Do you own a Type R? You HAVE to go into 4th gear in the 1/4, so you might as well shift a bit earlier and take advantage of some more power.

On the flipside...you may be able to start in 2nd gear with a higher FD


[Modified by JohnnyBoy, 4:13 AM 4/11/2002]

 

Alright clarification time: The JDM final drive, 4.785 + act xtss clutch + Spoon flywheel was good for .4 tenths in the quarter for my car. The addition of a final drive will lower your quarter mile time. The byproduct of the final drive is/can be, wheel spin, if not controlled properly the wheel spin will produce slower times. An ITR with the stock 4.4fd must be shifted into 4th to complete the quarter mile, so again the addition of a 4.785-4.9 will not add an extra shift.

So in conclusion, The addition of a final drive will make the car accelerate faster. However if you are not ready to upgrade to a sticky tire...better suspension..poly bushings...........you could end up being slower because you'll just be "spinning your wheels" no pun intended

Mattj

 

OK, one BIG question? How many of you have actually run the 1/4 mile with the 4.929?

I totally agree with the fact that the higher FD is NOT designed for 1/4 mile but, rather course racing. I also fully understand gearing and weight transfer and the differences between FF and FR cars. So no explanations needed thanks.

But, I also have seen the 4.929 go through the 1/4 with some very respectable times. As a matter of fact I just saw the videos last Sunday evening. Who of you thinks I am speaking of Rodney?

Why YES I am... He ran the 1/4 three weeks ago just for kicks and pretty well. Not to say that he had the ultimate times or that the FD IS designed for 1/4 mile cause it's NOT! But, he ran and well. "mid 13's hint, hint" I will also NOT quote his times since this is where he can expand the explain. Unfortuately he is not online as much as he used to be. I'll call him and see if I can get him to post some clear and concise answers about his experiences. He also has Video/ Digital Video and PICS of himself at the track. Check the link in my SIG for B18C5.com and see what he posted on his site.

Speculation is in interesting thing. Anyone speculate about anything... I want to be clear as Hell that I am NOT advocating the higher FD ratio for 1/4 mile and drag applications But, guess what for an N/A car IT does help for acceleration and if driven well, good times can be achieved. When Dragging with Turbo and SC it is not a good idea to combine the shorter FD most everybody can figure that one out. But, NA gets a decisive advantage. Of course tha REAL advantage is felt in the turns.

I am not flaming here guys, and those who know me know this. I am rather trying to Restate tha fact that the higher FD on a stock ITR or even a hot cammed R is functional for more than JUST course racing.

Now wheres Rodney?

A.

 

http://www.ericksracing.com/images/e...80sorenson.mov

count the gears

this is Allmotor Eriks Racing civic. something like 10.7 pass at like 123 or someting. he dropped below 7500rpms ONE TIME and that was on launch.

Toda Vtec killers

 

4 shifts, 5 gears used.

 

you count nice!! now that i look at it again...i don't even think he went below 7500

 

Thanks, Its all those years in the mid 70's watching Sesame Street. I think thats the problem with the kids today not enough Sesame Street

1 2 345 67 8 9 10 11 12...................(to theme)

Mattj

 

Bert is still in the closet.

 

sesame street ownz.......i flipped past it recently, and its just not the same. hell, i didnt even see oscar the grouch or snuffleuffagus

 

Cookie monster is da chit, y0!

Jason-
who, like Cookie Monster, eats everything in sight

 

free lesson of the morning.you must not know what weight does to V8s. so u should possibly take a lesson on weight and vehicle dynamics.

besides that, what does ericks racing 10 second car have to do with final drive?? if im no mistaken thats a turboed car that they run. thats way off topic.

 

i just took my son to sesame street live a few weeks back....i'm amazed at how attention getting elmo can be to a 2 year old