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Old 02-20-2003, 01:11 AM   #1
jackansi
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Default What does the USDM STi mean for the SCCA ProRally Open class?

Has anyone heard if Subaru will run the 2.0L or the 2.5L turbo engine in their open class ProRally car? If they could keep the cars in the race, I don't think there is much that could stop Subaru the first year they hit the trails....

Or would the USDM STi be allowed in PGT? I can't remember the PGT rules.

I believe with 2.5L would need to meet the maximum 36mm turbo inlet requirement (or use a restrictor) since its adjusted displacement would be around 4.3L Its been a while since I've look at the rule book.

I don't know, it might be better for them to just keep the 2.0L...

Anyone? Anyone?

SubieGal probably has the scoop on this one.
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Old 02-20-2003, 12:22 PM   #2
ANZAC_1915
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I'd be surprised if they used the 2.5 because of the restrictor required.

Glenn
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Old 02-20-2003, 03:50 PM   #3
Jon [in CT]
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I thought that SCCA ProRally Open Class turbocharged engines, regardless of displacement, were subject to the same 40mm inlet restriction.
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Old 02-20-2003, 04:42 PM   #4
jackansi
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I know the adjustment for a turbocharged engine is: displacement * 1.7 (well atleast I think its 1.7).

the adjusted displacement of the 2L would be 1994 * 1.7 = 3389.8cc.

here we go, found the rule book..
http://www.scca.org/amateur/performa...ook/index.html

Max adjusted displacement for Open class is 5.1L

Restrictor for 2350-4000 adjusted cc is 40mm x 3mm
and for 4000cc and up its 36mm x 3mm

So the current 2L would have a 40mm restrictor and the 2.5L would require the 36mm

*see article I under 10.1

I guess there wouldn't be much benefit moving to the 2.5L just maybe in the low end. Oh well... Thought there might be something wicked to look forward too at this coming Susquehannock Trail ProRally...
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Old 02-20-2003, 04:58 PM   #5
DistantTea
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Default Privateers will most likely use the 2.5 I think

I think we might see more privateers using the standard US STi as their rally cars... mostly because of its availability. It will be easier for them to get a US STi and tear it down for rally spec than to order an import 2L and then do it.

Of course from what I've seen these factory backed teams do even with those restrictors in place... there's no reason to think a 2.5L won't be able to produce more power where its needed.

I'd definately love to see the car I'm currently driving swinging around on the SCCA Pro Rally tour.

I definately can't wait to see it in production class racing here in the US.

-Tom
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Old 02-20-2003, 07:27 PM   #6
Jon [in CT]
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Quote:
Originally posted by jackansi
here we go, found the rule book..
http://www.scca.org/amateur/performa...ook/index.html

Max adjusted displacement for Open class is 5.1L

Restrictor for 2350-4000 adjusted cc is 40mm x 3mm
and for 4000cc and up its 36mm x 3mm
Hmm. Can't find any mention of restrictors for Open Class in that rule book. Can you point me to the right chapter? I do see that the Performance Rally Board is considering a reduction of the current 40mm restriction (see page 11 of http://www.scca.org/news/fastrack/03-01.pdf).

Last edited by Jon [in CT]; 02-20-2003 at 07:51 PM.
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