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how much torque makes a difference?

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Just wondering how much of a torque increase makes a difference in performance? Eg a lot of remapped vrs's have close the 300lb/ft, I have an upgraded clutch too so mine has been rolling roaded at 340lb/ft. So how different in performance would they be? Would 0-60 be the same but in gear be different maybe? Or would 0-60 be a tiny bit improved also with an extra 40lb/ft? Also the same question with people who have gone for a hybrid and have over 200 bhp but reduced torque compaired to mine?

From what I can understand, If your talking like for like cars with same gear ratio then 0-60 times will be better, but with higher bhp it will be quicker to reach on higher speeds once it gets going.

You can work it out in a theoretical basis - (assume both cars is same except for bhp and torque), using weight and time to determine how fast you can achieve a certain speed given the torque and bhp for each car by plotting in the dyno curves. Though thats more pub figures because in reality (imo) theres not much in it between a 180bhp/340ftlb vs 200bhp/300ftlb. You've got to worry about getting all those torques down first before you can use it, LSD time? :giggle:

If I am completely wrong though feel free to correct :D

As Carol Shelby once said "Horse power sells cars, Torque wins races".

  • Author

Yeah I was meaning like for like. I do have trouble even if its slightly damp

I assume it would depend on where the extra is. I assume the extra is below 2.5krpm. So in a straight line race were each gear change doesn't drop below 3krpm then I wouldn't have thought their'll be a difference.

If your accelerating from 2krpm then the extra will help.

As Carol Shelby once said "Horse power sells cars, Torque wins races".

Its not as cut and dry as that which is why people get caught up in torque figures. What he didn't mention was gearing ratios and power determines how fast you actually go.

  • Author

Don't forget though where talkin about like for like

If we're talking about the furby then past 3k rpm they'll all make the same power/torque. So above 3k their shouldnt be any difference. Should their?

My pd 130 has 380ftlbs with it's hybrid turbo and the way it pulls in 6th gear at 2,600 rpm(100mph) is comical! Hills just don't exist. It's a bit like being attached to a long rubber bungee cord at full stretch and then released. :| :thumbup:

:D:thumbup:

If we're talking about the furby then past 3k rpm they'll all make the same power/torque. So above 3k their shouldnt be any difference. Should their?

One would assume both cars are mapped differently so going from that the torque will drop differently between the two cars plus the peak torque will be at different rpm. Suppose a graphical approach is to have both graphs lined up and see which torque/bhp is higher through the revs, if the two bhp or torque lines overlap you can take the integral of the graphs and estimate which part of the rev's which will be used (if we're talking about 1/4mile race you would want start looking at 2.5k-3k upwards.).. :coffee:

I had a few words along these lines with local re-map fellow, if increased from 130bhp to 200bhp, and added the following.

Will decrease time 0 - 60mph from 9.3secs to 7.5secs with very little difference to top speed, owing to top gear ratio.

I never did have the re-map owing to reports on this site, of the life of clutches being noticeably decreased accordingly, and

paying £300 for little in performance, return.

Just wondering how much of a torque increase makes a difference in performance? Eg a lot of remapped vrs's have close the 300lb/ft, I have an upgraded clutch too so mine has been rolling roaded at 340lb/ft. So how different in performance would they be? Would 0-60 be the same but in gear be different maybe? Or would 0-60 be a tiny bit improved also with an extra 40lb/ft? Also the same question with people who have gone for a hybrid and have over 200 bhp but reduced torque compaired to mine?

With the proviso that yours can put the power down without wheelspin it will be quicker (than the usual remapped VRS). You are putting down more power through most of the rev range compared to the lower torque car. Hybrids and big turbos are another matter. They won't be lolling around at 2k RPM waiting for you to get the drop on them. They'll see 2K once on their way through 1st or 2nd gear, then zoom off into the distance.

J.

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