LS conversions and clutches used

[DonkeyApple]

It's not really a TVR question but an LS conversion one but as quite a few TVR bods have made this change it seemed sensible to try and ask here:

I've driven a few manual LS conversions over the years and the clutch weights always seem to differ from ludicrously heavy to completely normal.

So, the question is: How do you ensure that your LS engine conversion (using say the T56 box) will have as light a clutch pedal as possible?

[GasMunkey]

Twin plate hydraulic is what you want

[eff eff]

I've got a Mcleod single plate 10.9" its ok most of the time but in traffic it can be hard work

[DonkeyApple]

Thanks. This would be for a car that could easily spend long periods in traffic so having a clutch as light as possible will be crucial or it'll have to auto.

[jwoffshore]

I suspect the clutch action will be lighter/smoother if you use a concentric slave cylinder/realease bearing assembly as per the OE applications. If you drive any manual LS engined GM car, the clutch is not heavy.

[Brummmie]

Stock ls7 here, no heavier than my O/H 318 compact, and done countless 10sec qtrs.
When done around 3yrs it got a bit hit n miss the last drag meet, slapped a new plate in for $100, all is good!

[SteveSPG]

much of the difference will be the ratio between pedal ratio, clutch master bore, and clutch slave bore, in addition to the various clutch differences.

the nicest setup i had was ls7 clutch, 3/4 bore slave cylinder mounted on outside of bellhousing, 7/8 bore master.

i once swapped a .7 master for a 1 inch master to increase clutch throw on a t56......almost unusable whereas it was fine before

my current setup is ls7 clutch, .75 master, and whatever is fitted to the GM 6060...very light, doesnt slip, can drive in traffic all day

[7 TVR]

Same as Brummie stock LS7!

[Discopotatoes]

GasMunkey said:

Twin plate hydraulic is what you want

+1
Twin plate McLeod lighter than standard twice the grip

[tinker-27]

Just fit a ls7 stock set up and it will give you the best drive ability , twin plates are more money and can be noisy , they do hold more power ( not twice ) but not worth the bother unless you going 600 bhp +