Interesting dyno result

[Vee8ight]

I had my Cerbera dyno'd yesterday and it seems I have 348bhp ATW! Calculated to 400.5bhp at the fly. The only problem is, it's a 4.2! The only clue is my car was owned from new as a demo car for a tuscan racing team's garage.

Thoughts?

[camel_landy]

The report says it's a 1996 Cerbera...

Rebuild with later block? Light 'fettling' by previous owners??

M

[Vee8ight]

It runs a 4200 block, no idea on internals, 4.2 intakes, 4.2 ecu, 4.2 intake. Challenge cams maybe? 1996 car

[spitfire4v8]

It also says your car has next to no power below 3500rpm ..

it's a dynocom dyno I see .. you can buy the 4wd version on ebay for less than a 2wd dyno from one of the major players in the dyno world.
make of that what you will.

[Vee8ight]

spitfire4v8 said:

It also says your car has next to no power below 3500rpm ..

it's a dynocom dyno I see .. you can buy the 4wd version on ebay for less than a 2wd dyno from one of the major players in the dyno world.
make of that what you will.

Mmmmm, how busy are you? I thought I would need to bring it to you to verify.........

[QBee]

There's a guy called Peter Baldwin, near Cambridge. Hugely respected in the carburettor world, his dyno reckoned my standard 4 litre RV8 (normal average bhp circa 215) was good for 267 bhp at the fly. Sadly you need to use a known quantity dyno to be sure of your readings.

Is that a Cerbera I hear heading for Chesterfield?

Edited by QBee on Sunday 16th March 10:15

[QBee]

Darren, have you seen my email?

[ridds]

I hope you didn't pay good money for that print out.

Next time save your cash and I'll draw some lines on a chart in excel for you.

[Jhonno]

That graph looks very wrong to me..

[Vee8ight]

I can only present the info availiable to me. It was a shoot out style dyno run, so not totally accurate maybe, however everything was running low except mine, M5 with 325 bhp? The car is faster than a standard 4.2, it does mid 12's, has kept ahead of a Tuscan 4.5, maybe it's just a goodun. I don't know. It doesn't matter really, I know it's damn fast and makes me smile going sideways on roundabouts.

[QBee]

Yes, I seem to remember you are a fully qualified TVR owner.......last Thunder in the Tunnels, you had one opportunity to work on your car the week before and two jobs to do - make the exhaust louder and pop and bang on demand, or change a failing clutch.

Needless to say, you drove 130 miles home with no clutch......

[Vee8ight]

Measured a peak of 142 db @1 metre at full chat yesterday

[Vee8ight]

Can't think why everyone went and found ear protection after the first run

[FarmyardPants]

Jhonno said:

That graph looks very wrong to me..

+1

[RUSSELLM]

Unless my eyes are shot, it appears to have no power or torque at 3250 revs.

The graph finishes at 6.5k revs for some reason.

And a 14HP difference in 5 minutes.

All very odd.

[Vee8ight]

RUSSELLM said:

Unless my eyes are shot, it appears to have no power or torque at 3250 revs.

The graph finishes at 6.5k revs for some reason.

And a 14HP difference in 5 minutes.

All very odd.

I'm not trying to defend the results, we agreed to 6500 limit as my light comes on at 7k and I don't seem to have a limiter and hence didn't want to break it. For some reason they wanted to start the power run at 3k revs? The dyno fan was a bit pathetic and may cause some fluctuation?

[Byker28i]

you need to take it to a known, good, dyno person. Last TVR day we had a charlies there were a few large figures blown as it seemed one dyno was set high and the owners liked the figures claimed.

On the day, everyone els was generally much more consistent with their expected figures, which makes it a valid comparison.