Johnny 550 is Coming!
Discussion
Quinny said:
It's going to be a monster......
Mikey.... Itook the Griff out yesterday and can confirm that in slightly damp conditions in 4th gear it'll light the tyres up from about 60 mph..... It's gonna take some getting used to that's for sure...
:
I must admit it is a little scary!Mikey.... Itook the Griff out yesterday and can confirm that in slightly damp conditions in 4th gear it'll light the tyres up from about 60 mph..... It's gonna take some getting used to that's for sure...
:I think in those conditions the DSC will be on and the Sport button Off! (mental note to stock up on rear brake pads
)
I will answer the V12 question jonby - for now, here comes Johnny........
We are excited too, the Vantage feels a true supercar and is so fun to drive.
Johnny 550 5.0L engine was installed and fired up recently, from first fire the engine both purred like a kitten under the bonnet, and roared with a devilish burble out the tailpipe.
After a run in cycle he went straight to dyno, whilst we didn't need a roller to confirm what seat of the pants suggested was a complete animal, the numbers are entertaining and a real success to all the BR team that built him and got the project to this stage.
Who would of thought such an innocent looking car was such a savage supercar.
here is the raw data from the dyno.
The dyno result here is power at wheels which is not corrected.
Ambient pressure, relative humidity and air temperature were all measured by our own more accurate kit for us to more accurately than dyno provider calculate a correction factor.
Because Johnny 550 is only displacement upgrade currently, and exhaust system booty is to follow next, and because the delta uplift from the exhaust system is fairly well defined already, a prediction of what Johnny 550 will unleash full fat minus twin throttle inlet manifold can be calculated too.
Because we fitted the old 4.3L / non Vantage S exhaust system for this comparison, we removed the primary bricks meaning that this specification is directly comparable to GT4 racing. We wanted this because quite a number of race teams are looking to run this engine in competition as well as road cars. This means the delta from the BR exhaust system is a little less than normal here because we have to take into account that a brick is already missing.
I can then take all these figures and plot like this compared to standard 4.7L.....
The uplift in power and torque from standard 4.7L (redline), to johnny 550 as he is now (blue line) feels mega to drive and is far more uplift in relative terms from factory 4.3L to Factory 4.7L, this is because of the CNC combustion chamber and increased diameter inlet and exhaust valves.
Looking at this graph explains why Johnny feels so insane on the road, so insane that he almost feels like a standard V12V, so i thought i would plot this.....
Already just with displacement change Johnny is equal to V12V up to 5000 rpm. i thought that due to lower weight of Johnny Vs V12V he might pip V12V at power to weight ratio. The standard power to weight ratio of Vantage S is 263.8 BHP per ton, V12V is 290. Johnny at this first performance step change is 303.6 BHP per ton and with exhaust booty will rise to approx 325BHP per ton. When he has the exhaust booty the torque curve from 1000 rpm to redline will exceed V12V up to approx 6000 rpm, and because Johnny will both redline higher than V12V and produce more power, is the reason johnny will take the power to weight ratio, torque and absolute power output crown.
Next update is on Monday when MikeyK will drive him, after that test it is confirmation that the BR exhaust system delivers the numbers predicted here.
Some more sticky tyres might not go a miss too....
We are excited too, the Vantage feels a true supercar and is so fun to drive.
Johnny 550 5.0L engine was installed and fired up recently, from first fire the engine both purred like a kitten under the bonnet, and roared with a devilish burble out the tailpipe.
After a run in cycle he went straight to dyno, whilst we didn't need a roller to confirm what seat of the pants suggested was a complete animal, the numbers are entertaining and a real success to all the BR team that built him and got the project to this stage.
Who would of thought such an innocent looking car was such a savage supercar.
here is the raw data from the dyno.
The dyno result here is power at wheels which is not corrected.
Ambient pressure, relative humidity and air temperature were all measured by our own more accurate kit for us to more accurately than dyno provider calculate a correction factor.
Because Johnny 550 is only displacement upgrade currently, and exhaust system booty is to follow next, and because the delta uplift from the exhaust system is fairly well defined already, a prediction of what Johnny 550 will unleash full fat minus twin throttle inlet manifold can be calculated too.
Because we fitted the old 4.3L / non Vantage S exhaust system for this comparison, we removed the primary bricks meaning that this specification is directly comparable to GT4 racing. We wanted this because quite a number of race teams are looking to run this engine in competition as well as road cars. This means the delta from the BR exhaust system is a little less than normal here because we have to take into account that a brick is already missing.
I can then take all these figures and plot like this compared to standard 4.7L.....
The uplift in power and torque from standard 4.7L (redline), to johnny 550 as he is now (blue line) feels mega to drive and is far more uplift in relative terms from factory 4.3L to Factory 4.7L, this is because of the CNC combustion chamber and increased diameter inlet and exhaust valves.
Looking at this graph explains why Johnny feels so insane on the road, so insane that he almost feels like a standard V12V, so i thought i would plot this.....
Already just with displacement change Johnny is equal to V12V up to 5000 rpm. i thought that due to lower weight of Johnny Vs V12V he might pip V12V at power to weight ratio. The standard power to weight ratio of Vantage S is 263.8 BHP per ton, V12V is 290. Johnny at this first performance step change is 303.6 BHP per ton and with exhaust booty will rise to approx 325BHP per ton. When he has the exhaust booty the torque curve from 1000 rpm to redline will exceed V12V up to approx 6000 rpm, and because Johnny will both redline higher than V12V and produce more power, is the reason johnny will take the power to weight ratio, torque and absolute power output crown.
Next update is on Monday when MikeyK will drive him, after that test it is confirmation that the BR exhaust system delivers the numbers predicted here.
Some more sticky tyres might not go a miss too....
Good progress!
I notice the standard car dynoed below Astons stated figures for the Vantage S
Seems to be a common theme, I guess Aston are quoting figures from bench dynos?
Its annoying that "real" cars don't seem to make AM's figures
Silver lining is I guess once the "booty" is on it will dyno close to the "real" output of a Vanquish/V12VS
Fingers crossed!
I notice the standard car dynoed below Astons stated figures for the Vantage S
Seems to be a common theme, I guess Aston are quoting figures from bench dynos?
Its annoying that "real" cars don't seem to make AM's figures
Silver lining is I guess once the "booty" is on it will dyno close to the "real" output of a Vanquish/V12VS
Fingers crossed!
Edited by mikey k on Friday 20th December 16:04
it will be good to catch up!Holy.Mother.of.God.
I have just returned from BR, popped over to have Cockers' knob grafted onto my car, huge thanks to Adrian for expertly fitting and for eventually making me a coffee....I did supply the donuts by the way.
Anyway, whilst there, I was treated to a trip out in mikey k's beast, with Mikey at the wheel. Bear in mind this is before any exhaust or cat upgrade, just pure engine work. It is a monster. The power is so linear and it just keeps pulling all the way to the red line (which we experimented with.....)
Once complete, there is absolutely no doubt that Jonny 550 will be a weapon and anyone thinking about going down that route needs to talk to mikey......his face was an absolute picture. Great work Mike and Adrian, I simply cannot wait to see and hear the final result.
I have just returned from BR, popped over to have Cockers' knob grafted onto my car, huge thanks to Adrian for expertly fitting and for eventually making me a coffee....I did supply the donuts by the way.
Anyway, whilst there, I was treated to a trip out in mikey k's beast, with Mikey at the wheel. Bear in mind this is before any exhaust or cat upgrade, just pure engine work. It is a monster. The power is so linear and it just keeps pulling all the way to the red line (which we experimented with.....)
Once complete, there is absolutely no doubt that Jonny 550 will be a weapon and anyone thinking about going down that route needs to talk to mikey......his face was an absolute picture. Great work Mike and Adrian, I simply cannot wait to see and hear the final result.
Bincenzo said:
Holy.Mother.of.God.
I have just returned from BR, popped over to have Cockers' knob grafted onto my car, huge thanks to Adrian for expertly fitting and for eventually making me a coffee....I did supply the donuts by the way.
Anyway, whilst there, I was treated to a trip out in mikey k's beast, with Mikey at the wheel. Bear in mind this is before any exhaust or cat upgrade, just pure engine work. It is a monster. The power is so linear and it just keeps pulling all the way to the red line (which we experimented with.....)
Once complete, there is absolutely no doubt that Jonny 550 will be a weapon and anyone thinking about going down that route needs to talk to mikey......his face was an absolute picture. Great work Mike and Adrian, I simply cannot wait to see and hear the final result.
Is this the next 'difficult conversation' you will be having with the Mrs? I have just returned from BR, popped over to have Cockers' knob grafted onto my car, huge thanks to Adrian for expertly fitting and for eventually making me a coffee....I did supply the donuts by the way.
Anyway, whilst there, I was treated to a trip out in mikey k's beast, with Mikey at the wheel. Bear in mind this is before any exhaust or cat upgrade, just pure engine work. It is a monster. The power is so linear and it just keeps pulling all the way to the red line (which we experimented with.....)
Once complete, there is absolutely no doubt that Jonny 550 will be a weapon and anyone thinking about going down that route needs to talk to mikey......his face was an absolute picture. Great work Mike and Adrian, I simply cannot wait to see and hear the final result.
Maybe you could offer to pay for a few more tennis lessons as a sweetener.. 
Gettoff said:
Bincenzo said:
Holy.Mother.of.God.
I have just returned from BR, popped over to have Cockers' knob grafted onto my car, huge thanks to Adrian for expertly fitting and for eventually making me a coffee....I did supply the donuts by the way.
Anyway, whilst there, I was treated to a trip out in mikey k's beast, with Mikey at the wheel. Bear in mind this is before any exhaust or cat upgrade, just pure engine work. It is a monster. The power is so linear and it just keeps pulling all the way to the red line (which we experimented with.....)
Once complete, there is absolutely no doubt that Jonny 550 will be a weapon and anyone thinking about going down that route needs to talk to mikey......his face was an absolute picture. Great work Mike and Adrian, I simply cannot wait to see and hear the final result.
Is this the next 'difficult conversation' you will be having with the Mrs? I have just returned from BR, popped over to have Cockers' knob grafted onto my car, huge thanks to Adrian for expertly fitting and for eventually making me a coffee....I did supply the donuts by the way.
Anyway, whilst there, I was treated to a trip out in mikey k's beast, with Mikey at the wheel. Bear in mind this is before any exhaust or cat upgrade, just pure engine work. It is a monster. The power is so linear and it just keeps pulling all the way to the red line (which we experimented with.....)
Once complete, there is absolutely no doubt that Jonny 550 will be a weapon and anyone thinking about going down that route needs to talk to mikey......his face was an absolute picture. Great work Mike and Adrian, I simply cannot wait to see and hear the final result.
Maybe you could offer to pay for a few more tennis lessons as a sweetener.. I'm still grinning 
I had a good look at the graphs that Mike put up yesterday before going over today, I realised;
Adrian and Mike were raving about how Johnny drove, I was still concerned so got Adrian to come with me (not sure what he was going to do from the passenger seat )
No rain so first things first roof down!
Starting him up there is a much more pronounce "bark" and a lovely crackle from the exhaust with a bit of throttle
I set of a bit tentatively with full traction control on expecting to squirm all the way down the road on cold wet tyres.
Surprisingly he just gripped and off we went at no drama, reved it out to about 6k a few times with no issues.
I think Adrian got bored at this point and suggested I rev it ti the still stock redline.
We got some straight road and I floored it, the sound is immense! (I hope we can stay close to it with the other bits going on)
It pulls in a completely linear way right up to the red line and feels like it wants to carry on, strangely the gear changes from the paddles are quicker and smoother even with out the light weight clutch set up (possibly the better balanced engine)
Not once did the traction control light come on (though Adrian thinks it may have been pulling some throttle at the top)
So I got back and felt confident enough to take Bincenzo for a "spin" two grown men giggling like girls
So Bamford Rose have some more work to do before the project is complete but so far it has exceeded expectations and the next stage is going to make it mental.
When I got back we had a long chat about, ASM2 vs ASM3, dyno figures and tyres.
They are going work out the differences between ASM2 vs ASM3 fitted to the V12VS, one main difference is ASM3 has an oil cooler and pump (as does ASM1) we want to reinstate and possible improve on this to keep the gearbox temperatures down.
As I said earlier I was a bit disappointed with the project figures, talking to Bamford Rose it looks like Aston have a history of over stating outputs Vantage S's are making 415-420 and V12 Vanquishes ~ 540 BHP. So Johnny should be very close the new V12VS and Vanquish outputs (which was a target I had mentally set)
We all expected the stock tyres to struggle, surprisingly they didn't!) but with the next set of mods it may well be the case.
Not sure what to do about that yet. I could go up a size on the current wheels or got to DBS, V12V wheels, I really don't want to increase the unsprung weight if I can. Lets see what happens with ALL the mods on and dryer roads
I had a good look at the graphs that Mike put up yesterday before going over today, I realised;
- The 4.7 does not work best when reved right out peak torque is 5.5k rpm so I should have bee changing up early
- As Johnny stands (no twin throttle, standard 4.3 headers & cats, stock clutch, stock wheels & tyres) he currently has more torque between 2.7 & 5k rpm than a V12 and his peak torque is only 15Nm lower
- Power is a little down on the V12 across the range at the moment
- Mikes projections for the completed project look a little lower than I expected
Adrian and Mike were raving about how Johnny drove, I was still concerned so got Adrian to come with me (not sure what he was going to do from the passenger seat
)No rain so first things first roof down!
Starting him up there is a much more pronounce "bark" and a lovely crackle from the exhaust with a bit of throttle
I set of a bit tentatively with full traction control on expecting to squirm all the way down the road on cold wet tyres.
Surprisingly he just gripped and off we went at no drama, reved it out to about 6k a few times with no issues.
I think Adrian got bored at this point
and suggested I rev it ti the still stock redline.We got some straight road and I floored it, the sound is immense! (I hope we can stay close to it with the other bits going on)
It pulls in a completely linear way right up to the red line and feels like it wants to carry on, strangely the gear changes from the paddles are quicker and smoother even with out the light weight clutch set up (possibly the better balanced engine)
Not once did the traction control light come on (though Adrian thinks it may have been pulling some throttle at the top)
So I got back and felt confident enough to take Bincenzo for a "spin" two grown men giggling like girls
So Bamford Rose have some more work to do before the project is complete but so far it has exceeded expectations and the next stage is going to make it mental.
When I got back we had a long chat about, ASM2 vs ASM3, dyno figures and tyres.
They are going work out the differences between ASM2 vs ASM3 fitted to the V12VS, one main difference is ASM3 has an oil cooler and pump (as does ASM1) we want to reinstate and possible improve on this to keep the gearbox temperatures down.
As I said earlier I was a bit disappointed with the project figures, talking to Bamford Rose it looks like Aston have a history of over stating outputs
Vantage S's are making 415-420 and V12 Vanquishes ~ 540 BHP. So Johnny should be very close the new V12VS and Vanquish outputs (which was a target I had mentally set)We all expected the stock tyres to struggle, surprisingly they didn't!) but with the next set of mods it may well be the case.
Not sure what to do about that yet. I could go up a size on the current wheels or got to DBS, V12V wheels, I really don't want to increase the unsprung weight if I can. Lets see what happens with ALL the mods on and dryer roads
Edited by mikey k on Thursday 2nd January 16:48
Bincenzo said:
It's easy now she's fallen in lust with Matt from BR......I just tell her Matt has firmly recommended to have whatever it is done. She'll swallow anything. Oh, hang on, didn't mean that!!
Innuendos still flying How's Cockers knob?
Any chance you can post that video (or send it to me?)
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