Are the popular gear ratio on the s2000.
What about 3.92 on S2000, anyone using this drive ratio?

I need some comment or feedback: I have AP1 s2000 engine with 6 speed s2000 tranny, my final drive ratio is Cosworth 3.92 with QUAIFE ATB. The engine is supercharged 350 on the wheel. Here is the key & question...the car weigh in just a bit over 1000 LBS. So, what does the 3.90 gear ratio will equate to the performance of the car? The car is so light that I'm not even thinking about torque. Do i need to go to 4.10? 4.44 ? 4.57?
I don't want to spend any money if 3.90 will work with my configuration stated above.

Thank you folks

 

i think the stock ratio is 4.10. so 3.90 would be taller than stock. i would go shorter. many people like the 4.44 on the s2k

 

you should be ok considering you're boosted the taller gear is not such a bad idea. don't spend the money. i mean you will know if you need shorter gearing after driving w/e it is that you're building

 

how big are your tires gonna be? and are you gonna run a big track or auto-x type track? I would say 3.9 will be fine for now until you tweak it later. Hell its only 1000 pounds, just turn it on its side to remove the diff later if need be

 

The tires has small 205 x 50 x 15 size - I plan to replace next summer with 225 x 50 x 16

 

I was looking at getting the 3.9 gear. With any of those smaller ones, half the time you'll be shifting or spooling the turbo up.

 

1000lb chassis/drivetrain... chances are he'll accelerate out of the hole a bit faster than an S2000 nearly 3x the weight... lol...


if OP was on something like 275x40x17 the other gears might work..

 

..........so Dagle, I'm ok with 3.92?

 

^that. is. *******. awesome.

 

moar pics!

 

NO RADIO.....ALL ENGINE!!

 

That's a sweet seven.

 

I want your life.

 

At a half ton with 350 at the wheels, you will find the 3.9 a good choice. You may even want to go taller. With that weight, ratio and revs, you will be able to stay in gear for an eternity right through track-out and down the straight. If it's not too much work for you, you may want to give something in a 3.6-3.7 range at least a try.

Enjoy, track out must be awesome on that puppy.

 

I was thinking similarly to nsxplain, 3.92 is your best choice, just leave it be and tune accordingly. If you can fit a bigger tire setup, that may be another choice instead of going with a lower gear too

 

i would never throw 4.44 in my s2k, my buddy has them and its terrible on the highway

 

Is there a 4.52 option?

 

Sure, but why would you try to get that when there is a readily available 4.56 and 4.57? The .04-.05 taller gear won't net you any real benefit, the difference could be made by running a slightly bigger tire even lol

 

are you sure he doesnt have 4.77's? ive never heard that 4.44's were terrible, ever

 

They're not terrible, but they have a really bad whine and you sit right at about 6.5k - 7k at most cruising speeds.

 

Are u saying your S2K weighs only 1000lbs? How the ****? are my ears hearing correct?

 

nope...he was talking about the guys chaterham 7

 

yep

 

bigger fender wells and tires please.

Lol but all kidding aside, thanks for sharing. When you test it on your track of choice, you'll be able to figure out if your gears are too short or too long. I would venture to say that you'll be fine staying in 3rd gear most of the time unless if you plan on taking constant sprints between 80-110mph