Cerbera Shootout 2015

[pottman]

#	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	nick	4.2	n/a	15:30
14				16:00
15				16:30
16				17:00

[aide]

itsallyellow said:

I will come up with the 4.7 as long as My calendar allows it. I won't know until the end of March.

Mike

That would be great. I wonder if we're going to get confirmation of any other 4.7s for comparison?

[Pursyluv]

aide said:

itsallyellow said:

I will come up with the 4.7 as long as My calendar allows it. I won't know until the end of March.

Mike

That would be great. I wonder if we're going to get confirmation of any other 4.7s for comparison?

Jackwibble where are you

[Gray_101]

Unfortunately I won't be able to make it with the 4.8 but Joolz should have my graph ( but my engines only been mapped correctly to 5500 rpm )

[Vee8ight]

a1rak said:

Where are all the 4.7ltr cars. I would have thought the 4.7 engine builders would have been keen to showcase their upgrades, they will never get a better window to display products. Would also be nice to have some speed six cars as well.

Maybe they are all scared that after spending lots of pennies, the quoted BHP figures won't be that good?

[jackwibble]

Pursyluv said:

Jackwibble where are you

Busy working all weekend ! Just got in and I spoke with Jools when this thread first appeared and he has several 4.7 graphs one his computer, I may well come along on the day and run the car just didn't want to show Gazzab up and I notice the 4.8 is a no show well from 5500rpm upwards anyway.

[gruffalo]

Vee8ight said:

a1rak said:

Where are all the 4.7ltr cars. I would have thought the 4.7 engine builders would have been keen to showcase their upgrades, they will never get a better window to display products. Would also be nice to have some speed six cars as well.

Maybe they are all scared that after spending lots of pennies, the quoted BHP figures won't be that good?

No, just can't make this weekend.

Had this been half an hour down the road at SRR then I probably would have made it along.

[Tanguero]

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...

[Mr Cerbera]

Tanguero said:

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...

World's worst pun

[jackwibble]

Mr Cerbera said:

Tanguero said:

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...

World's worst pun

Think mine had new bearings fitted well i hope it did!

[Byker28i]

Tanguero said:

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...

I'd be interested to see comparisons on the day with some of the new larger capacity engines. Previous rolling road sessions when comparing standard and known cars to some with claimed high figures proved interesting. Some were proven right, some slightly optimistic. Having several cars there on the day is a great leveller

[Tanguero]

Byker28i said:

Tanguero said:

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...

I'd be interested to see comparisons on the day with some of the new larger capacity engines. Previous rolling road sessions when comparing standard and known cars to some with claimed high figures proved interesting. Some were proven right, some slightly optimistic. Having several cars there on the day is a great leveller

I agree entirely. I was more pointing out that fear of a 4.7 not making a lot of power is unlikely to be a reason for anyone not turning up!

While I can't speak for anyone else's engine, my 4.7 least doesn't make big power and I make no secret of the fact. Joolz has the charts for comparison that anyone is most welcome to look at. I won't unfortunately be taking part because of prior commitments.

[ukkid35]

Tanguero said:

I agree entirely. I was more pointing out that fear of a 4.7 not making a lot of power is unlikely to be a reason for anyone not turning up!

While I can't speak for anyone else's engine, my 4.7 least doesn't make big power and I make no secret of the fact. Joolz has the charts for comparison that anyone is most welcome to look at. I won't unfortunately be taking part because of prior commitments.

Presumably that's because you've retained the 4.2 intakes (and perhaps manifolds as well?), surely they are a limiting factor. I expect you have a lot more torque than the rest of us though.

[Mr Cerbera]

I realise these things have the potential to turn into a willy-waving party but, having communicated on this forum for 10 years now I have a feeling that people are gonna primarily be present for the 'interest factor' and the rapping the Stne Groove late into the evening on about how sometimes the most obvious, daily drawbacks can have such large (or small) effects on similarly liveried machines.
I am totally gutted that I can't be there due to my wedding anniversary

[RichV6]

ukkid35 said:

Tanguero said:

I agree entirely. I was more pointing out that fear of a 4.7 not making a lot of power is unlikely to be a reason for anyone not turning up!

While I can't speak for anyone else's engine, my 4.7 least doesn't make big power and I make no secret of the fact. Joolz has the charts for comparison that anyone is most welcome to look at. I won't unfortunately be taking part because of prior commitments.

Presumably that's because you've retained the 4.2 intakes (and perhaps manifolds as well?), surely they are a limiting factor. I expect you have a lot more torque than the rest of us though.

Basically sums my car up also, but it drives great and is more than quick enough for me!

[a1rak]

Tanguero said:

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

On several threads before I have questioned the figures claimed by a 4.7 upgrades. claims from 450bhp to over 500bhp made and I find it difficult to see where these powers are coming from. I believe that a well built 4.5 will proportionally match any 4.7 and that the gains are not due to just the capacity increase but on the quality and care of the build and components used.
I am happy to be proved wrong + its nice to have some banter on the forum. So 4.7 owners please step up or .... up.

[gruffalo]

I believe I remember reading on here may years ago that a larger than proportional increase was caused by allowing more space round the inlet valve.

I remember people saying that the valve was to close to the liner in the standard engine and it interfered with the swirl of air and fuel meaning a sub optimal burn. It was mentioned that by making the bore slightly larger this was improved greatly hence the dis proportional increase in power.

Having driver a 400bhp+ car and a 4.7 I can state that there is a marked difference.

[a1rak]

gruffalo said:

I believe I remember reading on here may years ago that a larger than proportional increase was caused by allowing more space round the inlet valve.

I remember people saying that the valve was to close to the liner in the standard engine and it interfered with the swirl of air and fuel meaning a sub optimal burn. It was mentioned that by making the bore slightly larger this was improved greatly hence the dis proportional increase in power.

Having driver a 400bhp+ car and a 4.7 I can state that there is a marked difference.

The inlet valve flow is shrouded by the shape of the combustion chamber not by the size of the bore. I appreciate 4.7 produce very good power but my point is that it is down to new components and an well built engine not the capacity increase and that a 4.5 built to the same spec will proportionally match a 4.7.

[Tanguero]

a1rak said:

Tanguero said:

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

On several threads before I have questioned the figures claimed by a 4.7 upgrades. claims from 450bhp to over 500bhp made and I find it difficult to see where these powers are coming from. I believe that a well built 4.5 will proportionally match any 4.7 and that the gains are not due to just the capacity increase but on the quality and care of the build and components used.
I am happy to be proved wrong + its nice to have some banter on the forum. So 4.7 owners please step up or .... up.

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.

Edited by Tanguero on Tuesday 10th March 13:40

[Mr Cerbera]

Tanguero said:

£14.2k gets you a billet crank, new cams and followers and this...

Holy Mother of God !

£800 got me this....