How Fast Is Your Hood

[Guest agi]

Hi All,

 

Just wondering but my S7 is running a standard 2ltr pinto with no modifications, 5 speed type 9 gearbox, LSD (cosworth) but i can only get about 85 mph top end is this normal.

 

I thought that with all that weight savings over the original donar car the car should have been as fast or faster. Certainly very fast on acceleration but just lacking top end

 

Can you help me to achive the magic 100mph or what do i need to do modification wise

 

Thanks

 

Agi

[Guest RichardO]

I've had over 90 in mine on the French autoroutes (not sure if the speedo is accurate though).

That's an S7, 2.0 Pinto, fast road cam, and twin 40's but at high(ish) speeds you are fighting the aerodynamics of a car styled on a brick.

 

 

Rich...

[fry61]

Put the Sierra body back on; it had a very low drag coefficient of 0.32 I believe.

[Guest WAXOFF]

My 2b 2ltr standard does 90mph on normal unleaded and 95 on super plus.

[Andi]

115 (sat nav) hows that for 80 crazy horses

[Guest peter2b2002]

I,ve had over 115 indicated on my 2ltr efi 2b , I think you may have the wrong ratio dif in yours if you have poor top speed but v good acceleration, mind you as it's a 70mph limit over here stay as you are

peter2b

[Graham B]

I think as Pete says, your diff ratio could be too low. 3.38 neeeds a lot of engive revs to get up there. What revs can you pull in top gear ?

 

My 8v DOHC tops the ton easily. with a 3.92 diff 5000 revs and still pulling !!

 

 

graham b

[keith kelly]

ive had about 95 out of mine 2.0L pinto with weber 45's there was more to go but bottled it at that point lol

[Guest Deano 777]

I have 2.0 pinto with standard gearbox and diff from doner. i have done over 100mph with just a small fly screen and a pair of sunnys on. (With Flys in my teeth)

[Bob Tucker]

The Type 9 5 speed was designed as an overdrive 5th gear (0.82) so top speed will usually come in 4th.

 

Check what engine revs its pulling at 85. If its about 3500 in 5th you have a high ratio backend 3.3 or 3.6. Best ratio for topend is 3.92, but taht makes 1st gear redundant on a standard box.

 

A standard good condition 2.0 should make 105-110.

 

No cheap or easy solution, just make the compromise that suits you best.

Bob

[Guest Tim Norman]

Ran out of "stupids" at 120mph and still accelerating, front end was starting to get a bit light. Would like to find a longer strech of tarmac where I can open him right up!

[Adrian]

standard 2l pimto, weber carb, got to 98 and chickened out..the front gets very light at speeddont think i would have got much more out of it. think the fuel gauge moved as fast as the speedo!!!

[tendoshingan]

in my zero with zetec 1.8, motorbike carbs, lsd diff, type 9 5 speed and an areoscreen, I got to around 120 then got really scared!!

I am sure I could have gotten another 5 mph out of it

[Knock-on]

Standard 2.0 which has never been above 70....

 

However, if I were to go above that I would expect to get over 90 with no problem until a sharp jab on my left arm indicated I might like to consider slowing down a bit

 

Digidash set for about 3% above real speed on electronic dash as calibrated at SVA.

[Guest scrabster]

hi,the fastest ive been in mine was 100mph the week after sva and before dvla at mallory park with richard from gbs.i swear the bonnet was bulging from the rush of air through the nose cone. sva test on rollers showed at 70mph the true road speed was 65mph so i havent truely done a tonne yet

jess.