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Discussion Starter · #1 ·
What class would a 1989 Chevy Sprint Turbo end up in? It is basically a Swift with a 1.0 3cyl turbocharged engine. I was sure it belongs in P1 but is there a penalty for factory turbo?
Thanks.
 

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I could be mistaken, but I think the multiplier is 1.7 so 1000ml X 1.7 = 'Correct Displacement' of 1.7L, so P3.
 

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Discussion Starter · #3 ·
Ah yes, thank you. It looks like I skimmed past that in the rulebook.

Does anyone have any idea how big the restrictor would be on this engine?
 

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>Ah yes, thank you. It looks like I skimmed past that in the
>rulebook.
>
>Does anyone have any idea how big the restrictor would be on
>this engine?
BIG!
Bigger than the exsisting air inlet.
I bet the way the wording is if strictly read it would require a restrictor meeting the 32mm for min 3mm max 50mm from the impeller rule.
Even if the little tiny IHI thing has like a 28mm OEM size.





John Vanlandingham
Seattle, WA. 98168

janvanvurpa (at) f4 (dot) ca

Vive le Prole-le-ralliat!
Vive Le Groupe F!
 

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>I bet the way the wording is if strictly read it would
>require a restrictor meeting the 32mm for min 3mm max 50mm
>from the impeller rule.

So, sayeth the CARS rules ...

"All production class and Group N turbo-charged, 4WD vehicles must have a turbocharger air inlet orifice of 32 mm diameter or less. If the turbocharger is equipped with a larger inlet, the use of a restrictor is required. It must have a minimum width (parallel to the direction of the airflow) of three (3) mm and be placed within 50 mm of the turbo blades."

Since the Chevy Sprint is 2WD, then no restrictor is needed, even if the air inlet orifice exceeded 32mm, right?

alan
 

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>
>>I bet the way the wording is if strictly read it would
>>require a restrictor meeting the 32mm for min 3mm max 50mm
>>from the impeller rule.

Should I have taken that bet? ;-)

>
>So, sayeth the CARS rules ...
>
>"All production class and Group N turbo-charged, 4WD
>vehicles must have a turbocharger air inlet orifice of 32 mm
>diameter or less. If the turbocharger is equipped with a
>larger inlet, the use of a restrictor is required. It must
>have a minimum width (parallel to the direction of the
>airflow) of three (3) mm and be placed within 50 mm of the
>turbo blades."
>
>Since the Chevy Sprint is 2WD, then no restrictor is needed,
>even if the air inlet orifice exceeded 32mm, right?

Correct

Not that a 32mm restrictor would significantly affect the output of a 1.0L motor; it'll still provide enough air for the hamster...:)

Adrian
 
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