gordini heads??

[Markey Mark (BD)]

what do you mean by scoff's car was hauling in 3rd ?

Meaning he's crossing the line in 3rd gear

[Scoff]

Meaning he's crossing the line in 3rd gear

I think rob just ment that it was starting to shift a bit in 3rd gear, because lag, poor ratio's and broken synchro's ment that it wasnt doing much in the other gears.

[Markey Mark (BD)]

I think rob just ment that it was starting to shift a bit in 3rd gear, because lag, poor ratio's and broken synchro's ment that it wasnt doing much in the other gears.

Ah i see, thats cool mate

[Scoff]

hauling = northern term

[Markey Mark (BD)]

hauling = northern term

Think our version is 'shifting' for us southener's.

[Woznaldo]

This is going a bit off topic but, Scoff what code VAG box are you using and what would be best for drags?

[Scoff]

This is going a bit off topic but, Scoff what code VAG box are you using and what would be best for drags?

Well, what I have may not be of much use to anyone because a lot of the choice making is going to depend on your torque curve, tyre height and predicted trap speed. I got 'most' of the ratio's right last year with my seat leon cupra-R gearbox, all apart from 1st gear which ended up being too short. Shifting even at 8200rpm would drop back to 5000rpm and since there was no boost until 5500rpm I had no power for about 2 seconds. also, the synchro's failed pretty quickly, adding to the shifting problem. The new gearbox has a mixture of ratios to suit my engine and new modified synchros, no off-the-shelf gear set was any use to me.

Bare in mind that the cupra-R gearbox probably will not be of much use to others either, it has a 3.389:1 final drive which is pretty tall. I ran this with 25" tyres so that I could do the whole lot in 3 gears. the new final drive is taller still, since I was running out of RPM's in 3rd gear last year. It should be good for over 140mph in 3rd gear

Back to the topic.... sorry

[Cabbage]

Tell that to the F1 designers, or the engineers at Yamaha responsible for the R1 and the like

The saying should read "There's no replacement for volumetric efficiency" - but that wouldn't be as catchy

Or there's no replacement for thermal efficiency, but that's even less catchy!

[Big Jim]

Or there's no replacement for thermal efficiency, but that's even less catchy!

Take a look at an F1 engines combustion chambers, there's no way thermal efficiency gets a look in. Why do you think they run them so hot? Volumetric efficiency of itself isn't that amazing either, the clever bit is maintaining it at those revs; Cosworth claiming 120% at 20000rpm!!!!