does anybody knows whats the top speed you can do with s5 or s4 turbo II transmission?
i mean at 5ft gear 8k rpm what would be the top speed?

 

160 or so with stock t2 gearing and 225/55/16 tires

 

Nobody knows..they usually crash at that point and can't report back the results!

 

S5 is about 240, S4 is about 260. Its literally what the speedo says.

But Styx is right. Usually the tires are only rated for like 200 hahaha.

 

one dumb wankel

 

This is where it's helpful to include a unit of speed...


Anyway, I've done 155mph in my S4 TII on stock size tires and that was under 7500RPM, it might have even been under 7000RPM.

 

Well I've done 135 mph in 4th at 7000 rpm in my n/a s5

 

That would be the other way around

S4 and S5 transmissions and final drives are identical, apart from 5th..
S5 has a longer 5th, providing a higher top speed.

I know first hand because i got a chance to buy a brand new S4 gearbox for a hell of a lot less money then rebuilding the S5 tranny. So i checked for differences first.

I love the lowered top speed and it being more responsive in 5th btw

 

well i wanna know cause i was racing with this e60 m5 other day and i was at 7500 rpm at fift gear and couldn't check my spedoo to be honest it was in the traffic, I know i have enough power to do over 180 but i never thought of the transmission

 

so you were doing 155+ near traffic....~_~

With a S4 TII tran and a S4 TII diff with a 4.1 on 225/45/17, I was pegged at 8000rpm in 5th gear, my Gtech pro was telling me was doing 162 mph. This was on a stock turbo at 14 psi, had plenty of power to go to atleast 170-175mph. If I was on a S5 TII tran, at the same rpm I probably wouldve been at 165mph.

 

edit: nvm

 

not you the OP

 

143mph @8k in 4th and about 165@8k in 5th. can push close to 180mph if you go to 9k.

tire diameter also makes a difference as it changes the stock gear ratio to the ground.

 

I don't care about topspeed, but I've been "cruising" on the autobahn when visiting family at 240-250 KPH. I'm sure I've driven faster, but that's not autobahn cruising anymore since it takes alot of work and time to accelerate at that point. (Stock S5)

Riz.

 

So just wondering what kind of trans they used in Bonneville fc3s that did 238.4 miles??

 

are you talking about the racing beat one? if so, just email or call them hahaha

the other one was built by Dandy Tanaka... maybe you can google that and see if its listed

 

most of it is just tall rear end gearing.

 

http://www.catherineandken.co.uk/sti/tyres.html
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/specifications-what-did-2nd-generation-rx-7-come-w-options-standard-features-642372/

You're welcome.

 

Thank you!!
so according to this top speed is 189 at 7500 with s5 turbo II gearing with 255/40/17 tires
and speedo is way off then lol

 

Is that with or without the JATO ignited?

JATO - for the real zoom zoom.