I know there are four classes: p1, p2 and gt1, gt2. I have been trying to search and figure out the differences between the classes especially between p1 and p2 and then gt1 and gt2.

Thanks for any help or links.

 

LMP1 - Minimum Weight 925 kg,
Engine Displacement Limit : NA - 6000 cm^3, FI (Gas) - 4000 cm^3, FI (Diesel) - 5500 cm^3
Tire Dimensions - 16" x 28.5"


LMP2 - Minimum Weight 775 kg,
Engine Displacement Limit : NA - 3400 cm^3 (8 cyl max, 4000 cm^3 homologated), NA (Gas) - 2000 cm^3 (6 cyl max, no Homologated engines), No FI Diesel;
Tire Dimensions - 14" x 28"

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Goullish &raquo;</TD></TR><TR><TD CLASS="quote">

LMP2 - Minimum Weight 775 kg,
Engine Displacement Limit : NA - 3400 cm^3 (8 cyl max, 4000 cm^3 homologated), NA (Gas) - 2000 cm^3 (6 cyl max, no Homologated engines), No FI Diesel;
Tire Dimensions - 14" x 28"
</TD></TR></TABLE>

That is a stupid light weight. Where do they get homologated engines for these things?

Any one have any info on the GT1 and GT2 cars?

Thanks

 

While I am wondering about these cars does anyone know why the DP cars went to open cockpit?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by giff74 &raquo;</TD></TR><TR><TD CLASS="quote">

That is a stupid light weight. Where do they get homologated engines for these things?

Any one have any info on the GT1 and GT2 cars?

Thanks</TD></TR></TABLE>

IIRC those are pretty much the only regulations for the motors you can build or run anything thats fits those rules.


GT1 and GT2 are production based, purpose built race cars. with GT1 being the faster class.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by giff74 &raquo;</TD></TR><TR><TD CLASS="quote">While I am wondering about these cars does anyone know why the DP cars went to open cockpit?</TD></TR></TABLE>

there are several resons. one of which is because open cockpit cars have less frontal area which allows for lower drag. also, roofs weigh more than no roofs, regardless of whether they are made from carbon fiber or not, and you want weight as low as possible.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by giff74 &raquo;</TD></TR><TR><TD CLASS="quote">While I am wondering about these cars does anyone know why the DP cars went to open cockpit?</TD></TR></TABLE>

If memory serves, the rule makers and promoters wanted to make the drivers more visible to the spectators to make the race spectating experience more entertaining.

 

If i remeber correcty it is also harder to desgin a good closed copit lmp car, that is why the Bentely was the first in such a long time. The Race Car Engineering Journal with the Bentley LMP1 on the cover goes into detail on why a closed copit is harder to desgin and perfect then a open.