Hillclimb road going class

[captainpugwash]

Blue book says that bonnet may be replaced with other material & there's also a section saying side profile must remain as std.
Can anyone tell me if I could run a bonnet with vents in it?
Thanks

[LordHaveMurci]

Can't see why not, won't change the profile unless it's a scooby style scoop rather than flush vents. May be worth checking with your local motor club.

[V40Vinnie]

unless they mean orientation/areodynamic projections or altering the shape to get a drag advantage?

[s2ka]

Depends how much the vents protrude and whether your fellow competitors feel like protesting.

I've had a vented bonnet all year in Sprint/Hillclimb Series Production and some fellow competitors have whinged to me, but not lodged official complaints. I would say it would take a particularly small minded idiot to make an official complaint against a vented bonnet in a speed event.

[captainpugwash]

Thanks, I am replacing original bonnet with a carbon fibre one & there is an option to have a pair of discrete low profile vents. Just want to help keep underbonnet temps down, I'm sure I've seen people running damn great air scoops on some cars in that class!

[Trev450]

I guess it really depends upon how anal your fellow class competitors are. I've seen all manner of body mods (splitters, bonnet vents, cannards, etc)in the production car class in the championship in which I compete, and no one has complained.

[Furyblade_Lee]

In our club its a no-no, lightweigh bonnet or boot lid will move you into modified. The Blue Book is only a guidance, and whatever club's event you attend has the right to enforce its own rules. Here in the SE no clubs allow that mod, but when I have been to events far afield the do. See what clubs championship you want to compete in, then go by there rules. A new production class is to be introduced in 2018, and that is NO mods whatsoever pretty much, which I think is the correct way to go for unmodified cars as there is soneone who always...... Just check your clubs indvidual regs

[df76]

Furyblade_Lee said:

In our club its a no-no, lightweigh bonnet or boot lid will move you into modified. The Blue Book is only a guidance, and whatever club's event you attend has the right to enforce its own rules. Here in the SE no clubs allow that mod, but when I have been to events far afield the do. See what clubs championship you want to compete in, then go by there rules. A new production class is to be introduced in 2018, and that is NO mods whatsoever pretty much, which I think is the correct way to go for unmodified cars as there is soneone who always...... Just check your clubs indvidual regs

Clubs in the south and SE that run "standard" classes won't allow changes in that class, however, everyone that I've seen also run a "roadgoing" class and that runs to the MSA regs. A different bonnet / boot material won't move you into the "modified" class.

[Furyblade_Lee]

df76 said:

Furyblade_Lee said:

In our club its a no-no, lightweigh bonnet or boot lid will move you into modified. The Blue Book is only a guidance, and whatever club's event you attend has the right to enforce its own rules. Here in the SE no clubs allow that mod, but when I have been to events far afield the do. See what clubs championship you want to compete in, then go by there rules. A new production class is to be introduced in 2018, and that is NO mods whatsoever pretty much, which I think is the correct way to go for unmodified cars as there is soneone who always...... Just check your clubs indvidual regs

Clubs in the south and SE that run "standard" classes won't allow changes in that class, however, everyone that I've seen also run a "roadgoing" class and that runs to the MSA regs. A different bonnet / boot material won't move you into the "modified" class.

Yes sorry that is what I meant, getting confused!