Can you get a cerby down to 999kg?
Discussion
What’s a Cerb, around 1300kgs, have to be a large driver to loose 300 kgs
I think the race car shows it can’t be done on a road going car without major changes which would have to start with seats at the very least as they are heavy.
Is the Cerb not already very light on its feet virtue of the long wheel base?
I think the race car shows it can’t be done on a road going car without major changes which would have to start with seats at the very least as they are heavy.
Is the Cerb not already very light on its feet virtue of the long wheel base?
Just mold and vac bag your own carbon panels. Carbon weighs a 1/3rd of Grp. Like this noble 
https://www.pistonheads.com/gassing/topic.asp?h=0&...
https://www.pistonheads.com/gassing/topic.asp?h=0&...
m4tti said:
Just mold and vac bag your own carbon panels. Carbon weighs a 1/3rd of Grp. Like this noble
https://www.pistonheads.com/gassing/topic.asp?h=0&...
That might be very clever but not my kind of look, I think I’d rather keep the weight on so more pies please https://www.pistonheads.com/gassing/topic.asp?h=0&...
Classic Chim said:
m4tti said:
Just mold and vac bag your own carbon panels. Carbon weighs a 1/3rd of Grp. Like this noble
https://www.pistonheads.com/gassing/topic.asp?h=0&...
That might be very clever but not my kind of look, I think I’d rather keep the weight on so more pies please https://www.pistonheads.com/gassing/topic.asp?h=0&...
Things that you can save weight on without losing the ‘niceness’ of the car :
2 piece Tuscan front discs : 1kg per disc
Rear ARB and mountings : 8kg (also improves traction and handling, will need adjustable shocks to stiffen the rear)
AC : 18kg
New Bosch coil packs vs original : 1.3kg
SP12 wheels : 8kg
RP flywheel : 3.63kg weight, not sure of standard weight
Helix clutch : 250g
Swap seats for Tillet B5 : 20kg
Decat : 1kg
Nitrons : 4kg
Alloy rad : 1kg
Rear seat belts : 2.5kg
CD changer : 1kg
Sports exhaust : 6kg
That leaves you with a car that doesn’t really look or feel different to standard, accepting that some might not want to lose AC.
It will handle better, stop better, be more efficient and faster.
One thing to be aware of : They don’t weigh 1100kg like TVR claim.
Mine was 1217kg before I started the weight saving.
2 piece Tuscan front discs : 1kg per disc
Rear ARB and mountings : 8kg (also improves traction and handling, will need adjustable shocks to stiffen the rear)
AC : 18kg
New Bosch coil packs vs original : 1.3kg
SP12 wheels : 8kg
RP flywheel : 3.63kg weight, not sure of standard weight
Helix clutch : 250g
Swap seats for Tillet B5 : 20kg
Decat : 1kg
Nitrons : 4kg
Alloy rad : 1kg
Rear seat belts : 2.5kg
CD changer : 1kg
Sports exhaust : 6kg
That leaves you with a car that doesn’t really look or feel different to standard, accepting that some might not want to lose AC.
It will handle better, stop better, be more efficient and faster.
One thing to be aware of : They don’t weigh 1100kg like TVR claim.
Mine was 1217kg before I started the weight saving.
Great list of weights.
Mine was 1178kg before I changed bits, but I did have nitrons on then. I know my exhaust system is 6kg lighter than the standard, I didn't weigh anything else, I didn't think of it.
Could the 1100kg be dry weight with a bit of TVR measuring?
How much is a tank of fuel worth
Mine was 1178kg before I changed bits, but I did have nitrons on then. I know my exhaust system is 6kg lighter than the standard, I didn't weigh anything else, I didn't think of it.
Could the 1100kg be dry weight with a bit of TVR measuring?
How much is a tank of fuel worth
Edited by Byker28i on Saturday 5th January 21:12
Skellz said:
itsallyellow said:
I think you will struggle with a road car.
Our Racer has obviously had loads of weight saving measures applied and at the last weigh in we were 997kg.
No inner wings
Single skin bonnet
Single skin boot
Single skin doors
All structural fibre glass removed
No interior at all, just bear fibreglass with a carbon dash.
Carbon fibre wheels (6.2kg) each
Lightweight onlins dampers
Only basic wiring for engine and lights
No heater system (pipe work or blowers)
Full carbon race seat (4.8kg)
Polycarbonate windows all round including windscreen
All interior fibre glass shaping cut away and replaced with flat carbon sheet.
Mike
lol im surprised its not a lot lighter, interesting to see what can be done. How much are those wheels? i bet you need to remortgage for a set!Our Racer has obviously had loads of weight saving measures applied and at the last weigh in we were 997kg.
No inner wings
Single skin bonnet
Single skin boot
Single skin doors
All structural fibre glass removed
No interior at all, just bear fibreglass with a carbon dash.
Carbon fibre wheels (6.2kg) each
Lightweight onlins dampers
Only basic wiring for engine and lights
No heater system (pipe work or blowers)
Full carbon race seat (4.8kg)
Polycarbonate windows all round including windscreen
All interior fibre glass shaping cut away and replaced with flat carbon sheet.
Mike
Cheers
Steve
Interring post earlier in the thread about tyre weight, slicks are so light compared to road tyres, how ever we run a massive size. If I get a chance I will weigh one of our slicks today. Anyone have a spare Cerbera road tyre they could put on some scales?
Mike
purpleliability said:
Things that you can save weight on without losing the ‘niceness’ of the car :
2 piece Tuscan front discs : 1kg per disc
Rear ARB and mountings : 8kg (also improves traction and handling, will need adjustable shocks to stiffen the rear)
AC : 18kg
New Bosch coil packs vs original : 1.3kg
SP12 wheels : 8kg
RP flywheel : 3.63kg weight, not sure of standard weight
Helix clutch : 250g
Swap seats for Tillet B5 : 20kg
Decat : 1kg
Nitrons : 4kg
Alloy rad : 1kg
Rear seat belts : 2.5kg
CD changer : 1kg
Sports exhaust : 6kg
That leaves you with a car that doesn’t really look or feel different to standard, accepting that some might not want to lose AC.
It will handle better, stop better, be more efficient and faster.
One thing to be aware of : They don’t weigh 1100kg like TVR claim.
Mine was 1217kg before I started the weight saving.
Some great bits there, have you weighed the car since? Can also add the lightened bonnet and boot lid 18kg saving. So all added up, looks like near 100kg can be lost, equating to about 8.3% weight saving. I thought they weighed 1100kg which is why i asked about the 999kg possibility. Seeing the racing cerbera weighs 997kg, it therefore seems to make sense that a stock car weighs 1200kg.2 piece Tuscan front discs : 1kg per disc
Rear ARB and mountings : 8kg (also improves traction and handling, will need adjustable shocks to stiffen the rear)
AC : 18kg
New Bosch coil packs vs original : 1.3kg
SP12 wheels : 8kg
RP flywheel : 3.63kg weight, not sure of standard weight
Helix clutch : 250g
Swap seats for Tillet B5 : 20kg
Decat : 1kg
Nitrons : 4kg
Alloy rad : 1kg
Rear seat belts : 2.5kg
CD changer : 1kg
Sports exhaust : 6kg
That leaves you with a car that doesn’t really look or feel different to standard, accepting that some might not want to lose AC.
It will handle better, stop better, be more efficient and faster.
One thing to be aware of : They don’t weigh 1100kg like TVR claim.
Mine was 1217kg before I started the weight saving.
So new target 1100kg
Wow, check out the weight of that slick! That’s amazing.
I’m heading to the autosport show this week to pick up some B5 seats, i’ll get the car weighed once it’s all back together.
The 1217kg was on four corner scales as well when I had the suspension set up. 1160kg would be where I’d hope to be, let’s see!
I’m heading to the autosport show this week to pick up some B5 seats, i’ll get the car weighed once it’s all back together.
The 1217kg was on four corner scales as well when I had the suspension set up. 1160kg would be where I’d hope to be, let’s see!
Skellz said:
purpleliability said:
Things that you can save weight on without losing the ‘niceness’ of the car :
2 piece Tuscan front discs : 1kg per disc
Rear ARB and mountings : 8kg (also improves traction and handling, will need adjustable shocks to stiffen the rear)
AC : 18kg
New Bosch coil packs vs original : 1.3kg
SP12 wheels : 8kg
RP flywheel : 3.63kg weight, not sure of standard weight
Helix clutch : 250g
Swap seats for Tillet B5 : 20kg
Decat : 1kg
Nitrons : 4kg
Alloy rad : 1kg
Rear seat belts : 2.5kg
CD changer : 1kg
Sports exhaust : 6kg
That leaves you with a car that doesn’t really look or feel different to standard, accepting that some might not want to lose AC.
It will handle better, stop better, be more efficient and faster.
One thing to be aware of : They don’t weigh 1100kg like TVR claim.
Mine was 1217kg before I started the weight saving.
Some great bits there, have you weighed the car since? Can also add the lightened bonnet and boot lid 18kg saving. So all added up, looks like near 100kg can be lost, equating to about 8.3% weight saving. I thought they weighed 1100kg which is why i asked about the 999kg possibility. Seeing the racing cerbera weighs 997kg, it therefore seems to make sense that a stock car weighs 1200kg.2 piece Tuscan front discs : 1kg per disc
Rear ARB and mountings : 8kg (also improves traction and handling, will need adjustable shocks to stiffen the rear)
AC : 18kg
New Bosch coil packs vs original : 1.3kg
SP12 wheels : 8kg
RP flywheel : 3.63kg weight, not sure of standard weight
Helix clutch : 250g
Swap seats for Tillet B5 : 20kg
Decat : 1kg
Nitrons : 4kg
Alloy rad : 1kg
Rear seat belts : 2.5kg
CD changer : 1kg
Sports exhaust : 6kg
That leaves you with a car that doesn’t really look or feel different to standard, accepting that some might not want to lose AC.
It will handle better, stop better, be more efficient and faster.
One thing to be aware of : They don’t weigh 1100kg like TVR claim.
Mine was 1217kg before I started the weight saving.
So new target 1100kg
I guess the question is what does 100kg weight reduction give you in real tangible performance increase.. Is it 0.1/0.2 off a 0-60... and dare i say it with increasing values.
Would you want to go doing anything too left field and lose some of the value and appeal to the next potential owner.. removing air con for example. Seemed a good idea at the time when i removed mine. the new owner wanted it back on. Depends what your long term plans are I guess.
Would you want to go doing anything too left field and lose some of the value and appeal to the next potential owner.. removing air con for example. Seemed a good idea at the time when i removed mine. the new owner wanted it back on. Depends what your long term plans are I guess.
Going from 1200kg to 1100kg improves the power to weight ratio from 333/ton to 363/ton (assuming 400bhp).
Would you feel an extra 30bhp? Well, everyone that has a remap on their 4.5 always raves about finding 20-30bhp so it would be a performance benefit for sure.
A lighter car also stops, steers and rides better and has the potential to use less fuel as well.
My issue is that way more than the weight has changed on my car (was a 4.2, then 4.5, then 4.7, now head work...) so performance wise it’s tricky to measure. I’m happy to do some 30-100 runs in 3rd and time that to see how it compares to other cars?
30-100 is a good measure of flexibility, torque, BHP and weight plus removes any gear changing, anyone else up for that? Anyone got a V Box?
I haven’t done anything I couldn’t reverse (although AC would be a pain to fit) and TBH most of the mods an enthusiast would enjoy/appreciated I think.
I will do a full build thread on mine, it’s been tweaked over the last 9-10 years and it’s been a fun hobby to get it to that stage.
I’ve looked at light weight batteries countless times, running out of electricity is never fun so I’ve always shied away from doing it!
Would you feel an extra 30bhp? Well, everyone that has a remap on their 4.5 always raves about finding 20-30bhp so it would be a performance benefit for sure.
A lighter car also stops, steers and rides better and has the potential to use less fuel as well.
My issue is that way more than the weight has changed on my car (was a 4.2, then 4.5, then 4.7, now head work...) so performance wise it’s tricky to measure. I’m happy to do some 30-100 runs in 3rd and time that to see how it compares to other cars?
30-100 is a good measure of flexibility, torque, BHP and weight plus removes any gear changing, anyone else up for that? Anyone got a V Box?
I haven’t done anything I couldn’t reverse (although AC would be a pain to fit) and TBH most of the mods an enthusiast would enjoy/appreciated I think.
I will do a full build thread on mine, it’s been tweaked over the last 9-10 years and it’s been a fun hobby to get it to that stage.
I’ve looked at light weight batteries countless times, running out of electricity is never fun so I’ve always shied away from doing it!
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