Canadian vs US manifolds

[budawe]

I have moved this discussion from another section in response to the poster.

There seems to be some differences between the two countries intake manifold rules and I have read the CASC book and it's clear the group decided to exclude the bigger manifolds made in the usa. This exclusion includes virtually all manifolds made since the late 80's or early 90's. The Canadian measurement taken on the curved section is to be no larger than 1.029 and the US measurement is 1.070.

My question is whether the Canadian measurement rules apply throughout the whole country.

[nbrigido]

The rule set you are reading, I assume if from CASC set and apply to F1200. F1200 is an Ontario group, I cannot comment on those from other Regions in Canada.

[problemchild]

There seems to be some differences between the two countries intake manifold rules and I have read the CASC book and it's clear the group decided to exclude the bigger manifolds made in the usa. This exclusion includes virtually all manifolds made since the late 80's or early 90's.

Interesting spin, but Autowerks intake manifolds produced up until the mid-2000s fit within the F1200 rule set. Autowerks, and the Canadian-built Vallis engines, are the engines of choice with most competitors.

At the time that SCCA racers were going through the intake manifold nightmares, we decided we were not going to let our racing go through the same mess, and re-wrote the rules to maintain the standards that had been previously accepted. I am unaware of any negatives experienced by any of our racers.

[budawe]

We had the same choice to provide greater control but did not take it. I think too many folks had already bought the newer stuff and didn't want to give it up. A no touch spec manifold would have been a better solution as well but again, too much personal bias to allow that.

As a director and as a racer, I have seen this rule creep many times before and in many classes. An exception is SRF where there is a single vendor, Enterprises, who's decisions are based on what's good for the class and not economic or personal.

I have no issues with the Canadian approach and like the SSCA rule probably used what was out in the field to base their rules on and there probably not too many late model manifolds. I know that some builders weren't building bigger manifolds until later but they have become the norm in the US now.

Anybody have an idea about Quebec or British Columbia rules?

[nbrigido]

Honestly, I don't think there is a FV/F1200 running Quebec.

But no matter when a rule was created or for what ever reason, there is always time to look at writing new rules or creating a new standard....what ever it takes to put more cars out on the track continuously...

[budawe]

Montreal? There is a mid continent race series, I just don't recall the details. I've run in BC but my SCCA car was legal. Just wondering.

[Steve Davis]

The Manitoba group around Winnipeg runs "old style" manifolds, but I'm not sure if they are operating using CASC rules or their own.

[Tiago Santos]

Pretty sure the Manitoba guys are running the same rules as CASC (old style manifolds) - under their own group, but I believe the rules are identical. Falken tires, no fuel cells required, etc.

CACC in BC follows SCCA rules - slicks and big manifolds allowed, fuel cells required, etc. The CACC FV rules are limited to a single line of "whatever the SCCA says", I believe.

[Jean-Sebastien Stoezel]

The Manitoba region races under the Western Canada Motorsport Association (WCMA) rule set which adopted the CASC intake manifold rules (no blown allowed) in 2013.

JS