Hey i'm not only new to this forum, but have also only just bought a 1990 ls400. I took it out for a blast on the motorway last night and stormed along a flat section at 271kmh (167mph) at approx 4200rpm. The only modifications to the car are a full system sports exhaust and induction kit, (and before any doubters hit me with stories of the speedo being out, I have gone alongside my friends 2.0ltr turbo rover at 160 and my speedo was showing 160 too, PS don't try this at home kids, PPS all the above is alledgedly incase any of you are the police).
Plus I cant get the car to go over 4500rpm? Does anyone know about removing the limiter if thats what it is, or if it maybe is a problem with the ECT as this doesn't seem to affect the car whether on or off?
Any help would be greatly appreciated.
4500 is probably where the torque curve is greatest (350Nm @4400) , it probably cant go any faster considering 155 is supposed to me max on these cars. I know there is a limiter on the cruise control, but 167 is flying!!! and a 2l going 160? You have some good gas over there...All we get is 91 at the corner pump.
It was a 2.0ltr turbo with about £5000 spent on uprating the whole engine, suspension etc.
But with regards to the revs in my ls400, I had been told when I put ECT on, that it should go all the way to 6000rpm but this doesn't happen? It's not really about top speed though, with the car changing gear at 4500 it means the next gear comes in at lower revs where there is less torque and hence overall acceleration is slower than what the car is capable of.
Any thoughts?
