What boost level do Champ Cars run?

[Roy]

LOL… yeh laugh it up fun boy… when your R33 posts a time anywhere near that of my R32 at either the drags or the track, or has done more then one day at the track…then you can comment about the reliability or pace of the old R32:)

[INASNT]

what are the times i have to aim for?

[Roy]

Forget the times...just get out there and give the car hell:)

[Obakemono]

If you want massive boost on race engines look at some of the Pikes Peak cars, and some of the older Le Mans cars...occasionally they got up around the 2.0bar

Meh, the Sierra's used to run 40+psi during qualifying back in the GrpA days.

[Duncan]

Can anyone explain how the "on-demand" turbo boost works then?

Coz on our cars boost is driven by RPM.

no, not really, actually the wastegate controls boost on ths stock system.

And then of course many add an electronic boost controller that bleeds some of the boost the wastegate sees increasing boost again.

I would guess it is just some sort of electronic bleeder than increases the boost temporarily.

great feature for a race car tho, it really adds some strategy

[Roy]

Yeh it adds boost, but also changes the fuel and ignition maps so the car makes more power but suffers worse fuel economy:(

Yeh the Grp A days and turbos were great, but they never ran those sorts of boost levels for a race, two laps qualifying yes, but Pikes Peak Cars etc do it for the whole climb at high altitudes:) All impressive though:cheers:

[INASNT]

I remember jim richards and the other guy who used to race the bluebird group A years ago getting interviewed on rpm on channel 10. They were talking about the tricks they used to use for qualifing like running stupid amounts of boost and using things like fire extinguishers on the intercooler when on boost to keep the intake air temps down, as there wasent such strict rules those days.

The turbos used to be scraped tho after running more than 2 bar boost boost rather quick even just for a few qualifying laps.

[maccattack]

I remember jim richards and the other guy who used to race the bluebird group A years ago getting interviewed on rpm on channel 10. They were talking about the tricks they used to use for qualifing like running stupid amounts of boost and using things like fire extinguishers on the intercooler when on boost to keep the intake air temps down, as there wasent such strict rules those days.

The turbos used to be scraped tho after running more than 2 bar boost boost rather quick even just for a few qualifying laps.

Zoom magazine No 55 has an article on the Bluebird and mentions

"in race trim around 1.6bar (23.5psi) of boost, which is pretty good considering it's 19 years old. As for the qualifying set-up, I'll let Fred Gibson explain:"We just wound up as far as it (the wastegate)would go. It would probably be a bit under 3bar (44psi) and would be pumping out over 400hp (298kW+). It was good for one lap, then the turbo was junk." "

[INASNT]

LOL i wonder how much those turbos were each!!