The co-efficient for forced induction will be 1.5:1.?

[AWK-53]

Hi

Just after some help with understanding a regulation that I seem to keep coming across when reading rules for racing series. The series I'm interested allows both turbo and non turbo cars and the regs say the co-efficient for forced induction will be 1.5:1. Could anyone explain to me what that means please?

Any help appreciated, thanks

[LordHaveMurci]

Times the capacity by 1.5

[Simon T]

And be careful as the MSA equivalency factor is 1.7. If you are building an engine to fit into a below 2000cc class check how long they intend to keep to 1.5

At 1.5 a 1300 will be below 2000cc at 1.7 you will only be able to use 1175cc

Simon

[Simon T]

And be careful as the MSA equivalency factor is 1.7. If you are building an engine to fit into a below 2000cc class check how long they intend to keep to 1.5

At 1.5 a 1300 will be below 2000cc at 1.7 you will only be able to use 1175cc

Simon

[AWK-53]

Thanks guys that's cleared that up for me. Incidently it's Castle Combe Saloons I'm thinking of having a go at, 4 different classes but I was thinking of going in the 1800cc to 3000cc class.

[anonymous-user]

if you dont already have the car that fits the class, you would be better to source the car that fits the budget rather than pick a class and work to that. IIRC the championship winner has been a class B car for the last two years though its a bit fruity to say the least!

[CNHSS1]

MSA ratio for Speed events (sprints and hillclimbs) is 1.4, not 1.7 btw

[Madrabbit]

The equalivancy factor for stage rallying is 1.7 for turbo cars.

[AWK-53]

Ok thanks everyone for the input.

And yes Pablo (good advice) gona weigh up the options with obviously budget being one of them but I think class A would give the best chance to be at the front / win the race so that's one of the reasons for choosing that class.