LMP1 indipendants to run GT1 6.0 V12 production engines?

[knighty]

Just thought I’d check this and the result are interesting……..thought I’d compare the Astons pair of 34mm restrictors cross-sectional area, with the equivalent restrictors fitted to a 4 valve 6.0 race motor with air con, which wouild be a pair 34mm restrictors, compared to a pair of 32.8mm restrictors according to the 2008 regs…….I have not compared this with the 5.5 judd restrictors as that would not be an eggs-to-eggs comparison……..here gos.

2 off 32.8 ID restrictors = 1690 sq mm

2 off 34 ID restrictors = 1816 sq mm

The difference is 126 sq mm

Or in other words 7% bigger……..as all the gasoline engines are supposed to be equated around 650bhp, with an extra 7% that’s ……..wait for it…….695 bhp for the 6.0 V12 LMP1 Aston

[gwyllion]

You should compare the numbers without air con.

• Judd GV5.5: 2 x 32.9 mm = 1700 mm^2
• Aston Martin V12: 2 x 33.7 mm = 1784 mm^2

In that case the difference is 84 mm^2, which is 5 %.

Remember that Judd has 3% bigger restrictor this year, so it should produce 670 bhp instead of 650 bhp.

[HORNDAWG]

Originally Posted by gwyllion

You should compare the numbers without air con.

• Judd GV5.5: 2 x 32.9 mm = 1700 mm^2
• Aston Martin V12: 2 x 33.7 mm = 1784 mm^2

In that case the difference is 84 mm^2, which is 5 %.

Remember that Judd has 3% bigger restrictor this year, so it should produce 670 bhp instead of 650 bhp.

Why should he compare the numbers without air con? He, as far as I can tell, went for a real world comparison which has the AM in the Lola coupe w/a.c. installed and taking advantage of the restrictor break vs the Judd which is only in roadsters w/ no a.c. The larger restrictor allowed this year does have validity to it but there is still approx. 25bhp diff. With the better aero coefficients of the coupe....

L.P.

[gwyllion]

Originally Posted by HORNDAWG

Why should he compare the numbers without air con?

Because I have never seen mentioned that Lola uses an aircon in its coupe.

Peugeot, Dome and Epsilon Euskadi don't use aircon for sure

[AU N EGL]

with or with out the aircon changes or the restictor sizes, AM and corvette where able to make a few body aero changes, suppension changes, so the cars are faster with a few less hp then before all the changes.

[HORNDAWG]

Originally Posted by gwyllion

Because I have never seen mentioned that Lola uses an aircon in its coupe.

Peugeot, Dome and Epsilon Euskadi don't use aircon for sure

Here you go then, quote from an article @ DSC in the early days of the "Lola B08/60 Aston Martin Test" at Snetterton 12 Feb. 08

Sitting above the alternator was the air conditioning pump, which was running, but not plumbed in. “A good test of the belt,” was the explanation.

Good enough?!

L.P.