Jump to content

Top Speeds


jimbobtcc206

Recommended Posts

7 minutes ago, terry everall said:

My top spec blade in lightweight car just gets to 125mph and does not run out of revs ...it just won't go any faster

Does weight not go out of the window after about 70mph Terry? Aerodynamic drag takes over, and an aeroscreened  Westy with 200bhp irrespective if it's Bike power or lardy car power will top out at the same max velocity?

Am I right or talking b*****k? :laugh:

  • Like 1
Link to comment
Share on other sites

I have seen 130mph in mine on the National circuit at Silverstone, and 145mph on the back straight at Bedford (it was still gaining speed but was going very light so I backed off). I don't know what the top speed is on mine and I don't think I am brave enough to find out :getmecoat:

But I am running big power with a 3.6 diff to make it a bit longer in lower gears. I swapped from a 4.1 diff to a 3.6 as I was forever changing gear, and wanted to get past 60 with only one change.

  • Like 1
Link to comment
Share on other sites

Power and Torque are what you need to overcome the areodynamics etc

Link to comment
Share on other sites

My aeroscreened 185 bhp Zetec SEi has seen 120 at Snetterton on a GPS speedo, still accelerating but having to brake for the next corner, that's with a 4.1 diff, 4 speed Tran X box, 205/60-13 rear tyres and around 7500 revs, that engine had a forged rod let go recently, when I rebuild it it will probably have a higher diff ratio so I don't have to rev it so high to get the top speed.

Link to comment
Share on other sites

I'm thinking gearing for 135-140 would be a good compromise then for track use without being silly on the road. That said, I have no issue with drone on roads....I've lived with it before and I quite liked it strangely enough.

 

Link to comment
Share on other sites

Hit 117.7mph (from data logger) just before braking for Duffus at Knockhill, and the straight there is uphill from the hairpin. in a standard Busa with aeroscreen and full cage

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

Please review our Terms of Use, Guidelines and Privacy Policy. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.