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Old 01-06-2003, 04:52 PM   #1
Idjiit
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Default How does the American STi announcement effect Pro Rally?

Would have been better for Subaru to release a 2.0 STi in America? If the displacement is limited, it means that teams would have to start out with the non AVCS 2.0 liter WRX's instead of STis...?
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Old 01-06-2003, 05:16 PM   #2
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I looked at the specs for the WRC rally car and it still has the 2 liter turbo...
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Old 01-06-2003, 05:39 PM   #3
Idjiit
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Well, I KNOW it's not going to effect WRC... My question was regarding SCCA Pro Rally (and CARR for that matter). I don't know if their regulations limit displacement to 2.0L like WRC does.
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Old 01-06-2003, 07:41 PM   #4
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I talked to Wayne at AV Sports today ordering something and asked him about it. He said they wouldn't be using them, and wouldn't sell them anytime soon. He said the 2.5T engines would require a smaller 34mm restrictor compared to the 40mm they are allowed to run with 2.0L. So chances are you won't see too many (anybody) running a 2.5L engine. It's basically aimed at the street-driving consumer, not at the rally community in NA.
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Old 01-07-2003, 10:31 AM   #5
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2.5T engines run a 36mm restrictor in Open class under 2003 rules, not 34, since the adjusted displacement is over 4000 cc (2.5L * 1.7 turbo factor = 4.25 L). 4250 cc is still less than the 5100 cc Open class limit. You will probably see STi cars entered into ProRally Open class next year. You can still pump a lot of air through a 36mm hole...

For Production class, the adjusted displ is 2.5 * 1.7(turbo) * 1.3(4wd) * 1.2(4V/cyl) = 6.63L, putting it once again well into the PGT class and running a 32mm restrictor. I believe it'll be THE PGT car to beat, considering the competitiveness of non-turbo 2.5s in the class (with a comparable weight).

The car will have to be homologated before it's legal for Group N.
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Old 01-07-2003, 12:28 PM   #6
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Do you really think they will allow this car to run in PGT? If so that's crazy. I cant think of any car that will be able to touch it. The only question for either class are the brakes, which are huge. Those Brembos only fit under 17s. So you'd have to change the brakes.
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Old 01-07-2003, 12:30 PM   #7
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I'm hoping that the SCCA either excludes the 2.5T from PGT or splits into a P# arrangement like CARS, because with PGT containing 1.8L N/A AWD Impreza all the way through a 2.5L Turbo AWD Impreza, it's just getting too broad.

/Andrew
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Old 01-07-2003, 01:32 PM   #8
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Quote:
Originally posted by y2k4door
Do you really think they will allow this car to run in PGT? If so that's crazy. I cant think of any car that will be able to touch it. The only question for either class are the brakes, which are huge. Those Brembos only fit under 17s. So you'd have to change the brakes.
The old 4-pots and rotors should be a bolt-on affair. You could buy the brakes and a set of wheels for what someone might pay you for the take-offs.
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Old 01-07-2003, 01:45 PM   #9
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Quote:
Originally posted by dwx


The old 4-pots and rotors should be a bolt-on affair. You could buy the brakes and a set of wheels for what someone might pay you for the take-offs.
True. But the rear Brembos also require different hubs. So you'd need the other hubs or a $325 adapter.
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Old 01-07-2003, 02:24 PM   #10
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I think those would fit with 15" wheels, they look to be the same size as the old 2-pot rears. The car would look a little funny with gold brakes just on the back, but if it's a rally car who cares.
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Old 01-07-2003, 03:10 PM   #11
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Quote:
Originally posted by dwx
I think those would fit with 15" wheels, they look to be the same size as the old 2-pot rears. The car would look a little funny with gold brakes just on the back, but if it's a rally car who cares.
Yeah. I just dont know much that will throw off F/R braking proportions. Dont really want the rear brakes to overkill the fronts.
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Old 01-09-2003, 01:43 PM   #12
Mike Anson
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Quote:
Originally posted by jprowland
2.5T engines run a 36mm restrictor in Open class under 2003 rules, not 34, since the adjusted displacement is over 4000 cc (2.5L * 1.7 turbo factor = 4.25 L). 4250 cc is still less than the 5100 cc Open class limit. You will probably see STi cars entered into ProRally Open class next year. You can still pump a lot of air through a 36mm hole...

For Production class, the adjusted displ is 2.5 * 1.7(turbo) * 1.3(4wd) * 1.2(4V/cyl) = 6.63L, putting it once again well into the PGT class and running a 32mm restrictor. I believe it'll be THE PGT car to beat, considering the competitiveness of non-turbo 2.5s in the class (with a comparable weight).

The car will have to be homologated before it's legal for Group N.
In the rulebook, 10.2.F.7, it states that the cars must weigh 1.05 pounds per adjusted cc. If the STi is 6630 adj. cc then wouldn't it have to weigh 6,961 pounds to be PGT legal? For that matter, shouldn't all PGT WRX's weigh 5,569 pounds (adj displacement = 5304cc)? Am I missing something?

I smell protests.
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