Ford - Cosworth reluctantly provided support to teams wishing to run their older - spec engines in the IRL to whom Ford - Cosworth was an official engine supplier .
The IRL is a major point of contention for CART management .
Ford - Cosworth reluctantly provided support to teams wishing to run their older - spec engines in the IRL , a major point of contention for CART management , to whom Ford - Cosworth was an official engine supplier .