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CL, From experience, I found that lunchies lose their fun factor when you start making them quicker - less wheelies, more body-destruction due to rollovers.
BUT if you wanted to go quicker as cheaply as possible, the white-end standard 540s they use in the Mardave bangers are slightly more pokey than the kit 540.
Your main problem will be the restrictive nature of the Tamiya ESC, they don't allow a lot of current through them before they warm up & start to "throttle" their output (To protect themselves).
A cheap alternative can be had from Blacksmithproducts.co.uk & other Ebay sellers for about 8 quid, & coupled with an "Epic" canned motor (eg "Return of the Monster", you'll be longing for the days when you could drive on all 4 wheels, the right way up.
Note, like Stingray said, you'll get better run times with normal motors, tuned ones will drain your battery alarmingly quickly (Like 4 minutes from a 1400 SCR)

The white end 540 is the Johnson 540 mounted on some vintage tam. It was a hopup in the 80's. from remind, it was mounted stock in the first release of the vanessa

That reminds me - there appears to be a glut of "Cheap" standard 540s on Ebay at the mo - don't bother... I think they may be spares for the Chinese buggies (BSD, HSP etc) that are electric monster conversions from nitro on-road cars, & as such they behave a lot like crawler motors (Low speed, highish torque) but aren't any good for crawling either...

Just got round to fitting new sport tuned motor Lunchie in now a beast very quick and pops wheelies for fun.
I think im going to modify wheelie bar to try and control massive wheelies

crazy wrote:

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I think im going to modify wheelie bar ...

Fit it upside down.

make another with meccano and a big rubber meccano wheele