What is Aston Martin up to?

[AU N EGL]

Originally Posted by Truckosaurus

Would the larger restrictors not mean the extra power is released without having to rev higher?

Yes and NO. The engine is designed then tuned for the restrictor size.

Smaller restrictors ( Larger hole) will allow more air to pass though in to the Throttle bodies. Large Restrictors ( Smaller hole) will limit the air flow, however the speed of the air flow velocity into the throttle bodies is greatly increased.

So the options are:
move volume of air at slow velocity = pushing the HP UP THE RMP range
or
less air at high velocity = pushing the torque levels up in the lower rpm range.

Little over simplifed but that is the idea.

[HORNDAWG]

Well, even though I will probably be sanctioned for it;

Lets revisit the question that was asked.

Truckosaurus; Would the larger restrictors not mean the extra power is released without having to rev higher?

I still contend that the engine (production type homologated) was not designed for maximum volumetric efficiency at the operating rpm range with the particular restrictor being applied by the ACO in mind. And that if it is allowed a larger restrictor it will produce more power without changing the rpm operating range with any significance. Point of example is the larger restrictor allowed with a/c and the h.p increase gained by it! Granted there comes a time when there is an over-saturation of combustables and to utilize them an increase in rpm or chamber pressure is the only way to do so, but IMO this does not fit into that category.

L.P.

[phoenix]

Originally Posted by HORNDAWG

Well, even though I will probably be sanctioned for it;

Lets revisit the question that was asked.



I still contend that the engine (production type homologated) was not designed for maximum volumetric efficiency at the operating rpm range with the particular restrictor being applied by the ACO in mind. And that if it is allowed a larger restrictor it will produce more power without changing the rpm operating range with any significance. Point of example is the larger restrictor allowed with a/c and the h.p increase gained by it! Granted there comes a time when there is an over-saturation of combustables and to utilize them an increase in rpm or chamber pressure is the only way to do so, but IMO this does not fit into that category.

L.P.

Maybe you just didn't read my post fully:

All other things about the engine remaining equal, the engine will have to rev 22% faster to generate 695 bhp than it was spinning to generate 570 bhp.

[AU N EGL]

Originally Posted by phoenix

Maybe you just didn't read my post fully:

All other things about the engine remaining equal, the engine will have to rev 22% faster to generate 695 bhp than it was spinning to generate 570 bhp.

HP is not Linear at those levels and "All things can not be equal at those RPM levels"
to go from 570 to 695, the engine would need to be reconfigures with different intake, cam shaft(s) plus the engine management tuning would also need to be different not just increase RPMs

[phoenix]

Originally Posted by AU N EGL

HP is not Linear at those levels and "All things can not be equal at those RPM levels"
to go from 570 to 695, the engine would need to be reconfigures with different intake, cam shaft(s) plus the engine management tuning would also need to be different not just increase RPMs

It is pretty linear - except for friction of course.

However, I think I will leave you lot to nit-pick, hair split and generally bicker amongst yourselves......

[knighty]

Originally Posted by phoenix

However, I think I will leave you lot to nit-pick, hair split and generally bicker amongst yourselves......

well said........we have a ball park power figure from my calculated estimation, and the engine will spin faster due to the increased restricrtor area, yes the GT1 engine will need a heavy re-work for LMP1 spec.......now please, lets just leave it at that

anyways, just read about the GT2 AM project on DSC......they are mentioning a Prodrive launch or something like that at the Autosport show.....perhaps all our chat about LMP1 AM's is a waste of time?

[eddsc]

No. Not at all.

[fish88]

Originally Posted by knighty

well said........we have a ball park power figure from my calculated estimation, and the engine will spin faster due to the increased restricrtor area, yes the GT1 engine will need a heavy re-work for LMP1 spec.......now please, lets just leave it at that

anyways, just read about the GT2 AM project on DSC......they are mentioning a Prodrive launch or something like that at the Autosport show.....perhaps all our chat about LMP1 AM's is a waste of time?

I thought Barwell will drive with these cars not Prodrive itself.

[knighty]

Originally Posted by eddsc

No. Not at all.

sounds like you know more than your letting on ......you can trust us, we wont tell anyone......honest

[AU N EGL]

Originally Posted by phoenix

It is pretty linear - except for friction of course.

However, I think I will leave you lot to nit-pick, hair split and generally bicker amongst yourselves......

Fine you belive what you want. at those higher RPM levels, 6000 plus HP incease is not linear. from 2000 to 5250 rpms yes it is linear

Unless you care to post a good AM V12 dyno graph (SAE corrected) that shows differnly?

[class4v]

Do yo remember Lola saying that there was some interest by a manufacturer for their P1 Coupé... I do.
With Corvette's LMP1-a- like thing in testing (all kind of rumours), some other major manufacturers talking with the ACO, and the altered engine rule in ACO's rule book... what a fantastic time it will be for sportscars

[phoenix]

Originally Posted by AU N EGL

Fine you belive what you want. at those higher RPM levels, 6000 plus HP incease is not linear. from 2000 to 5250 rpms yes it is linear

Unless you care to post a good AM V12 dyno graph (SAE corrected) that shows differnly?

God help me to know the things I can change, accept the things that I can't and to know the difference..............................

[ss_collins]

There is an AM endurance racing announcement on thurs at the show. See you there Malc

[AU N EGL]

Originally Posted by phoenix

God help me to know the things I can change, accept the things that I can't and to know the difference..............................

Small minds keep things to themselves . .

So What ever. Next

[jhansen]

Ehem...

Originally Posted by AdamAshmore

Mod note: Trying to score points over each other!

To the mods this certainly seems to be the evident with a few members of this sub-forum. Frankly people notice this style of posting and judge the poster accordingly. However of concern to the mods is that it stops others posting because they can't be bothered to get into an exchange over something petty, or just because they find it tedious in the extreme.

There is no need to pick up on small points to prove you are right. There is also no shame in being wrong about something - you should try it as it is very liberating.

This is not aimed at anyone in particular, but please have a think about whether it applies to you. If you don't see it and continue we will start telling you, as we feel it is driving many with a love for this sport away from our forum.

P.S. There is no need to reply to this, PM if you have any concerns.

[ss_collins]

yes shall we move on...

Who is going to run the Astons in GT1,2,3,4 then?

[The359]

JetAlliance, Modena, and Gigawave should remain in GT1. Phoenix maybe?

Barwell for GT2.

Barwell as well in GT3, not sure if Scuderia Italia will remain.

JetAlliance I know bought up some GT4s.

[JAG]

It's still up in the air whether Aston are involved with Lola, but there is no doubt Lola have something major to announce.

[Justin Moran]

Originally Posted by ss_collins

There is an AM endurance racing announcement on thurs at the show. See you there Malc

OT
ss, if you get a chance come and say Hi, Im gonna be on the BMMC stand all weekend!

[minimangler]

Originally Posted by JAG

It's still up in the air whether Aston are involved with Lola, but there is no doubt Lola have something major to announce.

STOP SPECULATING!!!!

How many times has that been repeated in this thread?!

So Lola might be involved with Aston. Or anyone else with a V12!

Are we now certain Barwell are running the GT2s? I've had my wrists slapped more than once for assuming!

[Javi]

you guys are wrong, it´s not a V12, but a V8!!!!

altough i dont think it will beat an Audi R10....

http://www.astonmartins.com/racing/lolaam.htm

(sorry if it has been posted before, but everything was getting too serious)

[Jimmy Magnusson]

Originally Posted by minimangler

STOP SPECULATING!!!!

How many times has that been repeated in this thread?!

So Lola might be involved with Aston. Or anyone else with a V12!

Are we now certain Barwell are running the GT2s? I've had my wrists slapped more than once for assuming!

They have said as much as that themselves I believe.

[Tom908V12]

Can't wait for thursday looks exciting news !!!

[tramker]

Lola B08/60 Coupe Aston Martin V12

Just saw this car-engine combination mentioned on some news website (don't ask for details, nothing official, no additional info), in some obscure context, but couldn't be accidental. I'm 99% convinced it's going to be announced at the Autosport show.

[Bentley03]

The Czech's seem to think there's more than a little truth in the rumour..........

........check out the lists of which cars are participating in which series towards the bottom of the page.

Then again, I don't speak Czech so didn't understand a word of what was said in the article.