Theoretical Top Speed

[FastR1Red]

Sorry this is the calculation for the manual. If you can give me the ratios for the auto I'll work that out as well.

Here are the speed calculations for the manual in each gear @ 6000rpm. This is with 18" wheels, 40 profiles on the rear.

73.70 110.13 150.80 196.04 245.04 311.17

I've had mine up to 276kph, (gps logged) pretty regularly, but 240 most track days. At 240 it gets pretty light all over bit still ok under brakes. I had a passenger with me one track day and he couldnt believe the amount of pull it still had when we were at 250kmh.

[RAP1D]

Yeah its a great feeling nailing it at 200 and feeling a good strong push in the back... and then reaching for the next gear

[Power]

  ZAP_F6 said:

APS did 307km/h with their phase3 auto sedan in 2003 for Motor magazine.

The biggest problem was suspension and brakes.

At anything over 200km/h Aero plays a huge role and our cars lift the frontend. You would want a lowered car with stiffer suspension.

I would think 300km/h would be easily achievable, I have done over 200km/h (on the track) many times and the cars handle nicely with modded suspension.

Yeah, but like many things APS (my initial path into mods unfortunately) it wasn't the T diff, wasn't unichip only as they did some speed limit fix that didn't hold anyway except for that run, also I'm sure I read differing articles about wether it was Phase III or the never released Phase IV...

Still, it was a great acheivement, maybe the best documented?

From what I read it was apparently MORE than scary ~280km as the aero made the car need a few 'lanes'.

Who's going to beat it though?

Edited 10/09/07 09:57 AM by Power

[Power]

Any brains out there that can save from my procratinating and let me know what a BA MKII with standard diff ratio/tyre ratio & standard 4 spd auto with speed limiting removed could actually acheive @ 6,700rpm in top gear - all other issues aside (or the maths to work it out)?

Edited 10/09/07 10:01 AM by Power

[KryZak]

6700RPM?? Isnt the rev limiter set to 5900-6300 somewhere??

[Power]

  KryZak said:

6700RPM?? Isnt the rev limiter set to 5900-6300 somewhere??

Sorry (should have explained), thinking race *only* tune in Atomic engine + edit @ 6,700rpm limit & tuned to suit (the high side of a safe limit shall we say - bearing wear and more to the point even cranshaft flex at that speed could be an issue in time if higher.

I've had a flat 6,000 (bit more actually) set for all my tunes to err on the safe side, and would rarely use that rpm in any case - pointless due to the way it would function (torque/power) with current tune - just adds to potential problems mainly with the (race spec) bearings....hey, you could go 7,500rpm if you have $$$ to throw away on maintenance! Would sound damned good too - lol.

Edited 10/09/07 11:00 AM by Power

[dule]

I assume all the above posted speeds were recorded on private driveways and race tracks??? lol :banghead2:

[NVYDF6]

  ZAP_F6 said:

APS did 307km/h with their phase3 auto sedan in 2003 for Motor magazine.

The biggest problem was suspension and brakes.

At anything over 200km/h Aero plays a huge role and our cars lift the frontend. You would want a lowered car with stiffer suspension.

I would think 300km/h would be easily achievable, I have done over 200km/h (on the track) many times and the cars handle nicely with modded suspension.

but when they hit the brakes to slow down the car was swerving over 6 lanes they reckon, lucky they were on the air strip

[cobrav8]

I am a bit sceptical on how unstable the Falcons are.

I have raced my Cobra which is an aerodynamic barge up to 310km/h and braked at the end of the straight for a hairpin lap after lap.

A sedan with roof, windows etc is a slippery shape and should be reasonably stable. Sure the brakes are going to heat up - but as long as you are not doing it over and over - I cant see why the car should move so sideways.

[FastR1Red]

Have no problems with mine under brakes either. Had a fair bit of track time and it's pretty good, very controllable hard braking from any speed you can actually reach on the track. It's all about having the speed to control the car fast enough at such a high speed to stop the wandering.

Winton is a bit slower but I don't have any issues at Phillip Island or Eastern Creek.