Blowers with no firewall, cabin ventilation

[Andy]

Iain ready for his next track day

[BRoadGhost]

Yeah any kind of ducting would work; just a case of where you wanna take it from.

I run a cut bulkhead & blower (which I couldn't live without on a daily); the secret is to have it on only when moving ~ if you're in traffic then you wont want it!

[dan23]

As said above box the blower in
then maybe make an air feed to the blower like the old style piper cross air filters that had the air feed in the bumper

[Ernie]

Mine worked fine

[Peredur]

I'm building a rally car now without a firewall and as stated here with MSA regs I can't have any openings in the bulkhead. I'm planning on running a fresh air feed from the inner wing (behind the splash guard).

[Iain]

Cheers guys, I'm going to fit some window nets and rear vents and run with the windows down and see how I get on before going down the original blower route

[blue_peg_16v]

Van has no firewall and original blower and I've never found it a problem

[RallyMarshal]

I would create a "mini bulkhead" around the heater that seals it from the engine bay and only allows it to suck in from the scuttle panel - ie a U shape panel to enclose the heater on 3 sides with the 4th side being the existing rear part of the bulkhead.

That way its MSA legal (and safer - which is the main reason for the rule in the first place), gives clearance for the bodies / carbs etc.

However, its its cool air you want (rather than the heater as such), Id either fit a roof vent and/or polycarb windows with scoops around the sliders to channel air into the car.

Paul..

[Iain]

Will see how I get on with the window nets Paul, they seem the best balance between trackday safety, utilising existing airflow and "undoing" the changes for road use Just need to find some suitable vents for the rear screen

[RallyMarshal]

Ive got some you can borrow to try that idea if you like...

Paul..