luke89

iTrader: (1)

well have a nice time in canada anyways great country

RSCossieGaz

iTrader: (6)

once you do the business at brunters would you be tempted to maybe go abroad in europe somewhere and find a longer straight and finally see the absolute max speed acieviable

cossie350

Hi rod theres been a lot of talk about moving your peak power up the rev range would it not be easier to change the gearing so that the top speed is 217 at 7.5k or ami talking shit Good luck anyway.... When you attempting this ?

Anonymous

Changing the gearing is difficult we are already on 19" at the back & finding a Jag diff of a suitable ratio is difficult. Go too long on gearing & you lose accleration & the car wont get up to these speeds. Its all a compromise im afraid, what I really need is a 6th gear to slip into at around 195 now that would be nice.

Anonymous

All a bit guesswork at this stage obviously as you dont even have a power figure yet, but on the basis that you got over 210 before, and we know that it will have a fair bit more power this time im going to plump for 215mph as my guess

Mike Rainbird

iTrader: (3)

If you stick the engine on the dyno and experiment with cams so that peak power is still good at 8k (even if it is just for the top speed run), then I don't see why 215mph isn't achievable .

Porkie

iTrader: (1)

I suspect the brakes you have ARE upto the job but if they aren't and a few tiiny simple body mods would enable you to run bigger more effective brakes then I reckon you would be mad not to.

Would be safer as well as faster

However I think you know the brakes are more than good as they are

Anonymous

No plans to do that, gentlemans agreement to keep attempts in UK.

RichardPON

Any aerodynamic differences this time round?

Routing of the airflow under the car, or out the bonnet area for example?

le-claw

Milbrooke or mira have testing for high speed runs greater than brunters...

But its an oval so u would need a car that could handle the bends

ballin

iTrader: (1)

lol

Anonymous

Been talking about this today actually, Have a Rouse Splitter now & may lower front a tad, but not changing much as it works as it is.

Anonymous

Mike will only mod things we can change back if it makes the car nasty to drive, so no big horsepower ports etc. We will optimise what we have.
Remember Mike we are still using the spaced RS500 throttle body & the experts tell me you cant see 700bhp with that so no point going too wild.

FE'Z'OE

200mph + but I think i'd fill my knickers doing that but I never will so everyones safe

Enjoy Canada

Porkie

iTrader: (1)

MAKES??? You do realise its a 15 year old Ford don't you?

Anonymous

Well it aint nasty at the mo or no worse than any other Cossie, but Mark assures me I aint going to like the new cams .

Porkie

iTrader: (1)

Rod, I'm joking! I'm taking the piss out of shonky old Fords. Not Marks engine or your install!!

Anonymous

DanS

Good luck Rod, hope its holds together.

marco polo

iTrader: (1)

Rod

put T56 in it , thats a 6 speed if your on a 5 speed box with .0.80 and 3.54 rear diff and you can pull 200+

if you can pull the 6th @ 0.62 from a T56 you will be laughing


this is what i worked out on my car say if i could pull a 6th gear (which I can't before you start)

on my car in 6th gear and the 6th gear is 0.62 that means with 235/40-17" tyrs and 3.64 rear diff ratio it will be 32.18 mph per 1000 rpm


if i could pull 8,000 rpm in 6th i would be doing 257.44 mph

if i could pull 7,000 rmp in 6th ,i would be doing 225.26 mph

if i could pull 6,000 rmp in 6th ,i would be doing 193.08 mph

if i could pull 5,000 rmp in 6th ,i would be doing 160.9 mph

if i could pull 4,000 rmp in 6th ,i would be doing 128.7 mph

just an example

marco

Anonymous

aMarco you are correct, although a .62 is way to long on mine thats 283mph @ 8k even 900bhp wont pull that easily . Would need a .77 6th to take advantage in mine. Im happy with my 5 speed which has lasted 7years with no probs. We will run what we can with the ratios we have , no more development or changes im afraid.
Rod

Stuart.W

Bloody hell, you've finally realised a 6 speed gearbox is the way to go, next thing you'll be suggesting is perhaps a lighter car too

I'm guessing ONLY 216.5mph

If you had a proper (6 speed) gearbox and lost 200kgs (the car that is) then i'd say 225mph IF all 4 wheels stay on the ground that is.

Best of luck with anything official over 210mph as thats an amazing achievement

ps Can you take me out for a spin to show me how fast it is because I think your car is really really SLOW

mark_24v_wiring

iTrader: (1)

So why not get a T56 in it then and have the ratio's how you want.
You should be able to have one built with almost the same ratio's as the T5 and still have the 6th left at about 195

Anonymous

No the T56 isnt the way I want to go im perfectly happy with the Tremec.
Also the weight of the car makes no difference to Topspeed we did one run fully stripped it was no quicker. We have done 0-180 in 17.82 secs so we are not looking for extra accleration .
We simple dont have the Power to approach 220 in the distance we have.
Would need to be past 210 in the mile & that im afraid is not on.
Joel English has a Dynoed 960bhp & with his wing off better aerodynamics he managed 215.7 in 1.5miles so im pretty sure thats out of reach as well. The record at Brunters is 211 ( Long tail Macca 1) to approach or beat that is a very big call, remember even the Rocket & the Famous Ultima only managed 204.
I will Post my Computer figures for a Sierra to reach 215 in 1.5 miles the Power required may shock.
Thanks for all these comments its been worthwhile.
Rod

costina

iTrader: (1)

215.6

I feel the need the need for speed

Good luck Rod

CossieRich

iTrader: (1)

212 mph. Whatever speed you reach Rod you can retire gracefully as the 1st cossie owner to offically break the 200 mph barrier

Stuart.W

Did Joel English have the Dodge Viper?
How does his performance work out when using his car figures with your calculations?

I'd have thought the viper still has more drag than a Sapphire even with its wing off?

What tyre rolling diameter do you use, I assume the tyre would grow due to centrifugal force and having less weight acting down onto it as the rear of the car becomes lighter at speed?

Rs Gus

iTrader: (2)

who cares!

Anonymous

Your right- The Stack is set to the circumference of the wheel used on the day. In general the Stack is slow by about 2 to 3 mph. The 210 shows as 207 on my max recall. .

CossieRich

iTrader: (1)

why comment if you dont care

Anonymous

By Calcs show he would have required 886bhp to reach 216mph but ive no idea how optimum his gearing was & if he was past or before peak Power but he would have required over 900bhp thats for sure.
Rod

CossieRich

iTrader: (1)

Rod,

What power would you need to reach 215 in the confines of brunters in your cossie?

Anonymous

Gus
Seen your sig.

Did you see Rossi on the box today, totally unreal, he really is the Daddy.

AGAR-COSWORTH

Just out of interest why are you using the Jag diff - i was speaking in passing to a few guys about your car and the spec (inc the jag diff) they found it strange that you ran it as they said it was hardly the best option to go for, commenting that it would contribute alot of tranny loss.

I have no idea whether what they said it correct, so please enlighten me.

Mark Shead

Name another diff at the right cost and strenght and a kit to drop in a cossie straight away,
Look at the Gbox also and you will see we went for strenght over trans drag.

Mark

Rs Gus

iTrader: (2)

rod was a revenge attack for lees post see the funny side as its only a joke

Keith B

Rod - I wouldnt even try again at Brunters. Get the car set up how you like and head over to Europe and use a longer track. Job done and its so much more of an event than Brunters.

Anonymous

No !!
It will be done in UK over 1.5 miles so records can be compared its a gentlemans agreement. Could go too the States & read a book while hacking across the salt flats but a bit pointless.
Rod

puddy

Surely you can accelerate a lighter mass to the same top speed more

quickly?

Also braking distances for a lighter mass would be shorter,thus gaining

extra time still accellerating?

puddy