Cerbera Shootout 2015
Discussion
These graphs are all fine, ajp's are all slightly different and items such as induction type and exhausts can play a part in final figures. The one constant is the Dyno set up Jools uses to measure power and torque, this appears to have remained the same, my graph I posted earlier is 9 years old!! I keep my 450bhp graph for special occasions though.....
Jules
Jules
Cyclone1 said:
The one constant is the Dyno set up Jools uses to measure power and torque, this appears to have remained the same, my graph I posted earlier is 9 years old!!
There are charts from three different Dynos on this thread. Charlie's Surrey Rolling Road, Joolz original Track Car Solutions, Joolz current APEC Belgium.This is mine done on Joolz dyno a few years back...
The 399bhp is slightly unrepresentative, this was (I believe) a run late in the evening with cool air.... The other times my Cerb has been on Joolz dyno (and when the very same dyno was at RaceProoved) it made between 393 - 396 bhp.
I honestly cannot say that I've ever noticed or felt the slight dip in the curve at approx 4500rpm on the road. Ever.
I'd actually forgotten that I'd had the head ported until I read the description on the dyno print out....
The 399bhp is slightly unrepresentative, this was (I believe) a run late in the evening with cool air.... The other times my Cerb has been on Joolz dyno (and when the very same dyno was at RaceProoved) it made between 393 - 396 bhp.
I honestly cannot say that I've ever noticed or felt the slight dip in the curve at approx 4500rpm on the road. Ever.
I'd actually forgotten that I'd had the head ported until I read the description on the dyno print out....
Cyclone1 said:
These graphs are all fine, ajp's are all slightly different and items such as induction type and exhausts can play a part in final figures. The one constant is the Dyno set up Jools uses to measure power and torque, this appears to have remained the same, my graph I posted earlier is 9 years old!! I keep my 450bhp graph for special occasions though.....
Jules
Must. Not. Bite.Jules
Tanguero said:
You aren't going to be proved wrong, not by my car at least. I think you misunderstand what I said - I meant that as a 4.7 owner, I already know that my engine won't make the big power that was suggested by some.
£14.2k gets you a billet crank, new cams and followers and this...
On Jools dyno
On Surrey Rolling Roads dyno
Hardly the 450 bhp that was bandied about when deciding to to go for a 4.7 rather than a 4.2 or 4.5 rebuild.
That must be running out of flow.. It starts tailing off before a 4.5 does! Strange.. Sure it drives lovely though!!£14.2k gets you a billet crank, new cams and followers and this...
On Jools dyno
On Surrey Rolling Roads dyno
Hardly the 450 bhp that was bandied about when deciding to to go for a 4.7 rather than a 4.2 or 4.5 rebuild.
Edited by Tanguero on Tuesday 10th March 13:40
Tanguero said:
Vee8ight said:
Maybe they are all scared that after spending lots of pennies, the quoted BHP figures won't be that good?
Everyone that I know of with a 4.7 knows exactly what power they are or aren't making so being 'scared of finding out' has no bearing on it...Darren
Vee8ight said:
Tanguero said:
Vee8ight said:
Maybe they are all scared that after spending lots of pennies, the quoted BHP figures won't be that good?
Everyone that I know of with a 4.7 knows exactly what power they are or aren't making so being 'scared of finding out' has no bearing on it...Darren
Tanguero said:
Vee8ight said:
Tanguero said:
Vee8ight said:
Maybe they are all scared that after spending lots of pennies, the quoted BHP figures won't be that good?
Everyone that I know of with a 4.7 knows exactly what power they are or aren't making so being 'scared of finding out' has no bearing on it...Darren
Darren
FUBAR said:
421 bhp, although I did have a run about 18 months ago and it was down to about 410 bhp IIRC (since had a faulty injector replaced but cant say if that was the reason)
The day before this it went on the Austec rollers at 426 bhp, but we all know their rollers are vastly over
Looks a decent enough graph haha!The day before this it went on the Austec rollers at 426 bhp, but we all know their rollers are vastly over
Didn't Austec change their Rollers though during the early days of tuning?? Hence the initial comments on reading accuracy?
Either way the cars with induction, exhaust, remap etc pretty much made within 10-20bhp of each other, pretty good and not that noticeable at circa 400bhp.
Glad yours is still going strong and hats off for keeping it. Still wish I had mine sometimes.
Jules.
ukkid35 said:
There are charts from three different Dynos on this thread. Charlie's Surrey Rolling Road, Joolz original Track Car Solutions, Joolz current APEC Belgium.
I am aware of that. My comment refers to the fact that Joolz is still using the same set up as he did many years ago. Dynamometers are easily manipulated unless the set up parameters remain constant. Joolz appears to be running the newer software on his dynamometer, but set up looks the same.Jules.
Cyclone1 said:
Looks a decent enough graph haha!
Didn't Austec change their Rollers though during the early days of tuning?? Hence the initial comments on reading accuracy?
Either way the cars with induction, exhaust, remap etc pretty much made within 10-20bhp of each other, pretty good and not that noticeable at circa 400bhp.
Glad yours is still going strong and hats off for keeping it. Still wish I had mine sometimes.
Jules.
Ive no idea about changing rollers buddy. I cant think of serious replacement for it. Well, not that I can afford lol...and the kids go 'radio rental' whenever I mention changing it. I think its coming to the grave with me!Didn't Austec change their Rollers though during the early days of tuning?? Hence the initial comments on reading accuracy?
Either way the cars with induction, exhaust, remap etc pretty much made within 10-20bhp of each other, pretty good and not that noticeable at circa 400bhp.
Glad yours is still going strong and hats off for keeping it. Still wish I had mine sometimes.
Jules.
Never thought about getting another?
FUBAR said:
Ive no idea about changing rollers buddy. I cant think of serious replacement for it. Well, not that I can afford lol...and the kids go 'radio rental' whenever I mention changing it. I think its coming to the grave with me!
Never thought about getting another?
Yes, I occasionally check to see what's available. Would make the perfect weekend type car. Quite a few engine rebuild as well as engine replacement options as well.Never thought about getting another?
I think if my two young boys ever get the chance to go out in a Cerb, then they will be smitten also. They love my CLS mainly due to the noise, in fact I am on my second CLS55 as I enjoyed the first one so much!
Jules.
| # | Name | Car | Saturday Night Hotel | Roller time |
|---|---|---|---|---|
| 1 | aide | 4.5RR | Chesterfield Ibis | 09:00 |
| 2 | Vee8ight | 4.2 | Lincoln | 09:30 |
| 3 | Cyclone1 | CLS55AMG | NA | 10:00 |
| 4 | pottman | 4.5 | N/A | 10:30 |
| 5 | Grahamn | 4.5 | Chesterfield Ibis | 11:00 |
| 6 | MikeinSheffield | 4.2 | N/A ?? | 11:30 |
| 7 | Dswiscrazy | 4.2 | N/A ?? | 12:00 |
| 8 | Waveydavey1000 | 4.2 | N/A | 12:30 |
| x | BREAK | BREAK | BREAK | 13:00 |
| 9 | Rich V6 | 4.2 (4.7 bottom end) | N/A | 13:30 |
| 10 | ukkid35 | 4.5 | Chesterfield Ibis | 14:00 |
| 11 | Richiebhoy | 4.2 | N/A | 14:30 |
| 12 | a1rak | 4.5 | Chesterfield Ibis | 15:00 |
| 13 | 15:30 | |||
| 14 | 16:00 | |||
| 15 | 16:30 | |||
| 16 | 17:00 |
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