Looks like Malc & his B2K have been busy :)

[*89x2*]

From: http://www.corvettecentral.co.uk Dyno day :cool

 

[Peer81]

Looks like they had a good day down @ Jeal and Sones!
Malc: Could you give some more info on the runs?

Groeten Peter.

 

[callaway4fun]

Jeal and sons

Here is a link it says he put down 350 hp but had detonation issues. http://www.corvettecentral.co.uk/visit_to_geoff_jeals.htm

Looks like they had a good day down @ Jeal and Sones!
Malc: Could you give some more info on the runs?

Groeten Peter.

 

[SurfnSun]

Those are good numbers! Hopefully he can get it straightened out and get a full run in.

 

[reubenmc]

Here is a link it says he put down 350 hp but had detonation issues. http://www.corvettecentral.co.uk/visit_to_geoff_jeals.htm

detonation issues........what's meant by that??

 

[SurfnSun]

Detonation is when the gas prematurely ignites in the cylinder. So while the piston is coming up the exploding gas is trying to push it back down. It is a certain killer on forced induction cars. The compression in the cylinder heats the gas up to a point that it ignites. Its usually caused by poor gas or an excessively lean A:F which makes the motor run hotter. Hope that helps.

 

[reubenmc]

Detonation is when the gas prematurely ignites in the cylinder. So while the piston is coming up the exploding gas is trying to push it back down. It is a certain killer on forced induction cars. The compression in the cylinder heats the gas up to a point that it ignites. Its usually caused by poor gas or an excessively lean A:F which makes the motor run hotter. Hope that helps.

Thanks Josh, that does help. I had read about guys having trouble with detonation before and had no clue what that meant. Thanks again.

 

[malc350]

Guys, just noticed this thread!

I wasn't going to run my car on the dyno that day (can you believe this, it had started leaking oil again...) but I was almost press ganged into it by almost everyone who was there who wanted to see "what the Callaway would do"

Previously a Z06 was dyno'd and put out around 335 HP at the rear wheels which they estimated at 375 at the flywheel.

Trouble is the dyno was in KW for power output and NM for torque and Geoff Jeal had to convert the figures.

I've been looking at conversion values and they all seem to vary a little - I have calculated my car to be putting about 320 HP at the rear wheels though when Geoff was working it out it didn't look as straightforward as just applying a conversion factor.

I was also disappointed that my car couldn't run up to peak power revs (4,250) and due to detonation issues (car got really hot, you could feel the heat from the engine, much hotter than I have ever got it on the street) they only ran it up to 3550 RPM

I would guess at those revs that even 320 HP at the rear wheels wouldn't be bad as it still has 750 RPM to go for max power.

Interestingly, contrary to Callaway's published max torque figure being achieved at 2500 RPM, the torque on my car was increasing even at 3550 RPM :confused

In all I was a bit disappointed due to:

1. Dyno being in KW and NM
2. Car running hot (the fan they used to cool the car was huge but obviously inadequate)
3. Not reaching peak power revs

I personally think the car has to be run again on a BHP / FT/LBS dyno and has to hit max power revs. There's another dyno near me but it only runs to 300 RWHP so it's no good.

P.S. Oil leak may have been oil pressure switch which I just replaced. Otherwise the intake's gotta come off again!!! :cry

 

[SurfnSun]

You'll get her straightened out Malc. Trust me I know