my-first-rst

anyone know the top speed of a escort series 2 LSD gearbox? do they all have the same gearing?

and will the LSD fit in a series one non LSD gearbox?

cheers
steve

forevaford

iTrader: (2)

yes it will fit, mite have to swap crown wheels tho. i think they all have the same gearing. and top spead is about 155mph at 6.5krpm. thats just guessing from my personal expieriance lol

my-first-rst

hmmm i have a escort box on my zetec turbo and it dont seem to have any top end, unless my 1.3 fiesta clocks are under reading? my clocks read 122 in 4th at 7krpm and 5th seems to only wanna do about 135ish?

crazycage

whats the power of the zetec turbo?

my-first-rst

about 220bhp, only running 12psi of boost as i think i have a duff injector

crazycage

its not a lot of power really mate and as you say its about so could be less ,whats the spec ?

my-first-rst

surly with that power it should do more than 135 tho?

its a rs1800 engine with spacer plate, fiesta rs inlet, beige injectors, ofab management, 195chip, stage 2 sierra cosworth turbo, front mount intercooler, uprated rod bolts, vernier pulley's, full stainless, uprated escos fuel pump ....

before i put the sierra turbo on and escos fuel pump i was running a 1.3hcs fuel pump and a escort t3 and i had it rolling roaded at 200bhp and 220ft/lb at 10psi

since i put the new turbo on and made the new bigger downpipe it feels much more powerfull.

steve

Herbo747

i would personally do away with the beige injectors, dont rate them much at all, i remember my escort with them, they were at there whits end running about a bar!

my-first-rst

what ones did u use instead? i have been looking about but im no good with the high/low ohms and cc/min etc

andy130

iTrader: (2)

top speed 135,

Herbo747

well i binned the management and went with gotech and now run injetors ordered from the states, they are known as green tops... they are bosch.

my-first-rst

ah right, i have a omex 500 ecu but need a new loom made really but dont know who can do that sorta thing?

xr2wishy

iTrader: (2)

top speed does depend on rev limit and power.

xr2wishy

iTrader: (2)

shouldn't be that high pal, christian only made 171mph @7200rpm on 350bhp and specially selected ratios in his box.
i'd reckon 135-140 for most would be the limit on a standard box.

cossyking

i use to get my 200bhp of the clock all the time a few years ago so at least 140 i would say on a s2 box but not a s1 box as ratios different

franky_db

iTrader: (3)

Running on standard rims with 195/50/15 tyres hitting the limiter at 6250rpm (standard limiter) in 5th you will be doing 141.0mph on standard gear ratios.

The difference made by tyre/wheel size at 6250rpm =

205/45/16 = 144.6mph
205/40/17 = 145.8mph

With my 230bhp lump i managed to to hit 6500rpm in 5th on standard rims which should 146.6mph based on gear ratios and tyre size.

Data calculations below...

Gearbox:- Series 2
Gear Ratios:- 3.15 1.91 1.28 0.95 0.76 Final drive 3.82
-------------------------------------------------------------------------------------------
Top Gear gives 22.563 MPH/1000 RPM and a top speed of 141.019 MPH at 6250 RPM

Engine speeds in top gear:-
30 MPH = 1330 RPM 40 MPH = 1773 RPM 50 MPH = 2216 RPM 60 MPH = 2659 RPM
70 MPH = 3102 RPM 80 MPH = 3546 RPM 90 MPH = 3989 RPM 100 MPH = 4432 RPM

Top Speed in 1 gear = 34.024 MPH
And changes into 2 gear at 3790 RPM dropping 2460 RPM
Top Speed in 2 gear = 56.112 MPH
And changes into 3 gear at 4188 RPM dropping 2062 RPM
Top Speed in 3 gear = 83.730 MPH
And changes into 4 gear at 4639 RPM dropping 1611 RPM
Top Speed in 4 gear = 112.815 MPH
And changes into 5 gear at 5000 RPM dropping 1250 RPM
Top Speed in 5 gear = 141.019 MPH
************************************************** ****************************************
Gearbox:- Series 2
Gear Ratios:- 3.15 1.91 1.28 0.95 0.76 Final drive 3.82
-------------------------------------------------------------------------------------------
Top Gear gives 23.141 MPH/1000 RPM and a top speed of 144.631 MPH at 6250 RPM

Engine speeds in top gear:-
30 MPH = 1296 RPM 40 MPH = 1729 RPM 50 MPH = 2161 RPM 60 MPH = 2593 RPM
70 MPH = 3025 RPM 80 MPH = 3457 RPM 90 MPH = 3889 RPM 100 MPH = 4321 RPM

Top Speed in 1 gear = 34.895 MPH
And changes into 2 gear at 3790 RPM dropping 2460 RPM
Top Speed in 2 gear = 57.549 MPH
And changes into 3 gear at 4188 RPM dropping 2062 RPM
Top Speed in 3 gear = 85.874 MPH
And changes into 4 gear at 4639 RPM dropping 1611 RPM
Top Speed in 4 gear = 115.704 MPH
And changes into 5 gear at 5000 RPM dropping 1250 RPM
Top Speed in 5 gear = 144.631 MPH
************************************************** ****************************************
Gearbox:- Series 2
Gear Ratios:- 3.15 1.91 1.28 0.95 0.76 Final drive 3.82
-------------------------------------------------------------------------------------------
Top Gear gives 23.334 MPH/1000 RPM and a top speed of 145.835 MPH at 6250 RPM

Engine speeds in top gear:-
30 MPH = 1286 RPM 40 MPH = 1714 RPM 50 MPH = 2143 RPM 60 MPH = 2571 RPM
70 MPH = 3000 RPM 80 MPH = 3429 RPM 90 MPH = 3857 RPM 100 MPH = 4286 RPM

Top Speed in 1 gear = 35.185 MPH
And changes into 2 gear at 3790 RPM dropping 2460 RPM
Top Speed in 2 gear = 58.028 MPH
And changes into 3 gear at 4188 RPM dropping 2062 RPM
Top Speed in 3 gear = 86.589 MPH
And changes into 4 gear at 4639 RPM dropping 1611 RPM
Top Speed in 4 gear = 116.668 MPH
And changes into 5 gear at 5000 RPM dropping 1250 RPM
Top Speed in 5 gear = 145.835 MPH
************************************************** ****************************************
Gearbox:- Series 2
Gear Ratios:- 3.15 1.91 1.28 0.95 0.76 Final drive 3.82
-------------------------------------------------------------------------------------------
Top Gear gives 22.563 MPH/1000 RPM and a top speed of 146.660 MPH at 6500 RPM

Engine speeds in top gear:-
30 MPH = 1330 RPM 40 MPH = 1773 RPM 50 MPH = 2216 RPM 60 MPH = 2659 RPM
70 MPH = 3102 RPM 80 MPH = 3546 RPM 90 MPH = 3989 RPM 100 MPH = 4432 RPM

Top Speed in 1 gear = 35.385 MPH
And changes into 2 gear at 3941 RPM dropping 2559 RPM
Top Speed in 2 gear = 58.357 MPH
And changes into 3 gear at 4356 RPM dropping 2144 RPM
Top Speed in 3 gear = 87.079 MPH
And changes into 4 gear at 4824 RPM dropping 1676 RPM
Top Speed in 4 gear = 117.328 MPH
And changes into 5 gear at 5200 RPM dropping 1300 RPM
Top Speed in 5 gear = 146.660 MPH
************************************************** ****************************************


Hope this helps.

Add

franky_db

iTrader: (3)

I dont claim to be an expert, so dont take the above to be gospel.

JesseT

The LSDs of S1 and S2 do swap over, but the crown wheels are held by a different bolt pattern which means that the LSD or crown wheel bolt pattern has to be redone.

Rod-Tarry

Gearbox's dont have Topspeeds just ratios. You would need to know wheel size, tyre ratio, Topgear ratio & Diff ratio. This will be limited by the rev limiter or peak power of the engine.
eg. My car running on 205/50/15 tyres is rev limited (8.3k) to 193.6mph change to 225/40/19 & the rev limit is 218.9mph all on the same box/diff.
You also need the Power to pull to the limiter.