Dyno Disappointment
Discussion
Yeah, come on koo, spill the beans (or have you actually had to back down and accept it, and are now too embarrassed to admit it??).
I'm one of skid's Cerbie owning mates, and am pretty convinced mine is well down on the quoted geegees too (as they all are, I'm led to believe - S6 excepted).
what's the score??
cheers
sean
I'm one of skid's Cerbie owning mates, and am pretty convinced mine is well down on the quoted geegees too (as they all are, I'm led to believe - S6 excepted).
what's the score??
cheers
sean
I'm wondering if this has all been a big hoax (or indeed if Koo is a hoax).
Ok, I know some people that have Cerbs that aren't very mechaincally minded, BUT having to ask if a Cerb is Fuel injected : www.pistonheads.com/gassing/topic.asp?f=6&h=0&t=56340
Ok, I know some people that have Cerbs that aren't very mechaincally minded, BUT having to ask if a Cerb is Fuel injected : www.pistonheads.com/gassing/topic.asp?f=6&h=0&t=56340
olly said:
I'm wondering if this has all been a big hoax (or indeed if Koo is a hoax).
Ok, I know some people that have Cerbs that aren't very mechaincally minded, BUT having to ask if a Cerb is Fuel injected : www.pistonheads.com/gassing/topic.asp?f=6&h=0&t=56340
Good call Olly.
Does a cerbera have fuel injection - doh!
Seems strange for someone so mechanically minded to be so concerned about the measurements of the mechanical abilities of a cerbera.
You guys been reading my reply to that thread then?
I was going to say "why don't you look under the bonnet"
Anyway Koo, please let us know how you have resolved the issue as a successful conclusion is a postive benefit to others PH'ers who may want to have a similar problem fixed and it sounds as though you've managed to find the fastest fixing dealership in the country.
BTW What colour/shade is your car again?
I was going to say "why don't you look under the bonnet"
Anyway Koo, please let us know how you have resolved the issue as a successful conclusion is a postive benefit to others PH'ers who may want to have a similar problem fixed and it sounds as though you've managed to find the fastest fixing dealership in the country.
BTW What colour/shade is your car again?
Just to get back on the original theme ( while Koo
thinks about his next reply ), while trawling through
stacks of Cerbera articles for TCR, I came across this
from Autocar.
"You will see in this week's landmark test of the TVR
Cerbera, that we subjected it to a rolling road test to
check it's power and torque.
This was not because we thought TVR was either under or
overstating the abilities of it's new engine ( It performed to
within 0.3 percent of expectation ), but because all
performance cars that are submitted to us for full road
test will, as of this issue, receive such treatment.
It is a sad but undeniable fact that, in the past,
cars have been given to the press for road testing
that are not in customer tune.
We do not blame any manufacturer for making sure their
car goes out to the press fault free, but there is a
world of difference between this and building a car
which actively and unfairly misrepresents the model
which customers can buy.
This is not to say we suspect all or any of the
manufacturers; merely that, in the interests of
fairness, the rule must be applied across the board.
From time to time, we may choose to publish the results.
We hope we will never need to."
In the test of the 4.2 they reported this:
"In line with our new policy to dynamometer test
all serious performance cars, we put it on a rolling
road to verify TVR's claimed outputs of 350bhp at
6500rpm and 320lb ft of torque at 4500rpm.
The results were acurate to within a single horsepower
and one pound foot of torque."
Go create some weather...
Graham
TCR The Cerbera Register
www.TVR-Cerbera.com
thinks about his next reply ), while trawling through
stacks of Cerbera articles for TCR, I came across this
from Autocar.
"You will see in this week's landmark test of the TVR
Cerbera, that we subjected it to a rolling road test to
check it's power and torque.
This was not because we thought TVR was either under or
overstating the abilities of it's new engine ( It performed to
within 0.3 percent of expectation ), but because all
performance cars that are submitted to us for full road
test will, as of this issue, receive such treatment.
It is a sad but undeniable fact that, in the past,
cars have been given to the press for road testing
that are not in customer tune.
We do not blame any manufacturer for making sure their
car goes out to the press fault free, but there is a
world of difference between this and building a car
which actively and unfairly misrepresents the model
which customers can buy.
This is not to say we suspect all or any of the
manufacturers; merely that, in the interests of
fairness, the rule must be applied across the board.
From time to time, we may choose to publish the results.
We hope we will never need to."
In the test of the 4.2 they reported this:
"In line with our new policy to dynamometer test
all serious performance cars, we put it on a rolling
road to verify TVR's claimed outputs of 350bhp at
6500rpm and 320lb ft of torque at 4500rpm.
The results were acurate to within a single horsepower
and one pound foot of torque."
Go create some weather...
Graham
TCR The Cerbera Register
www.TVR-Cerbera.com
Exactly.
The 4.5 doesn't produce 420 bhp, and no ammount of factory spin can persuade me otherwise, they don't show 420 on the dyno 'cos the engine isn't producing it, simple.The early cars are great, nothing to do with the cam though, it's down to high compression ratio and good ignition timing, both these have been reduced over the years so current engines are around 10 percent down on power on average for the 4.2.
now consider the 4.5 and the differences over the 4.2 .. well there's the allegded increase in engine size but that's too small to make any real power difference, then there's the different induction system, but it's actually no more efficient than the 4.2 system and a flowed 4.2 system actually outperforms the 4.5 system anyway, other than that there's nothing in it, no wonder the 4.5 doesn't have the extra claimed 60 bhp, it's not there!! Have numerous dyno printouts to back this up, best 4.5 cerbie I've ever seen in std trim made 361bhp, best 4.2 made 359 bhp ... same dyno, same software, same correction, same operator all the time. I know if I'd bought a supposed 420 bhp car brand new and found it only had 320 bhp I'd be fuming. I say good luck to Koo .. sets a precedent for everyone else too .. go get your 420 bhp, you know you want it.
The 4.5 doesn't produce 420 bhp, and no ammount of factory spin can persuade me otherwise, they don't show 420 on the dyno 'cos the engine isn't producing it, simple.The early cars are great, nothing to do with the cam though, it's down to high compression ratio and good ignition timing, both these have been reduced over the years so current engines are around 10 percent down on power on average for the 4.2.
now consider the 4.5 and the differences over the 4.2 .. well there's the allegded increase in engine size but that's too small to make any real power difference, then there's the different induction system, but it's actually no more efficient than the 4.2 system and a flowed 4.2 system actually outperforms the 4.5 system anyway, other than that there's nothing in it, no wonder the 4.5 doesn't have the extra claimed 60 bhp, it's not there!! Have numerous dyno printouts to back this up, best 4.5 cerbie I've ever seen in std trim made 361bhp, best 4.2 made 359 bhp ... same dyno, same software, same correction, same operator all the time. I know if I'd bought a supposed 420 bhp car brand new and found it only had 320 bhp I'd be fuming. I say good luck to Koo .. sets a precedent for everyone else too .. go get your 420 bhp, you know you want it.
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