if you get the computer re-chipped, they can remove fuel cut, speed cut etc, i think Kev sells them for around $270 exchange, with a chip to suit, TNT, Mines etc.
what fuel system are u using?

I wouldn't underestimate the factory ECU - it will likely be cheaper to get someone to reflash your ECU - it will cost a bit a few hundred I would think - but a better result.

I haven't seen the 32 bit microtechs, but the 16bit ones were a little gay....

i think it's time for microtech

yeah still using factory dash....
no not using fuel pressure gauge

could be fuel supply, could be rev limit (3 speed + 4.11), could be speed cut.

Are you using factory dash and speed sender? Then it's speed cut.

Are you running a fuel pressure guage?

You don't tell us the revs at 350meters.

If you put it into storage for 50 years, you won't need the high speed nymore. because you'll be a grandpa driver.

spped cut defender.... that will get rid of it and any factory fuel/boost cut out.

not sure, thats one for the more experienced dudes to tell you. i dont even know if thats what the prob is but it makes sence right? aftermarket ECU.

is there a way i can get rid of that speed cut...

if your running standard ECU it may be the JDM 180km speed cut? with the ratios it might read 180kmh before your prob even hitting 140kmh

My Datsun 1200 runs out of power, before the end of 400 metres, whilst racing it at the drags.

It gets to a certain point and just comes to a hault, at 350 metres and the speedo goes off the clock.

I have CA18t , 7psi automatic 3 speed which runs a 1200 ute diff with diff ratios of 4/11.

Could anyone help me with this problem much appriciated