Beatdown Z
Full Access Member
My buddy needs help deciding what to do with his 89 GMC Jimmy. The truck has a pretty crappy drivetrain setup. It has a swirl port headed 350, 750 Holley with mechanical secondaries, 214/224 cam(think it's an Elgin grind), Edelbrock Performer intake, stock manifolds, stock converter, TH400, 2.73 gears, and 35" thornbirds.
His main complaints are not enough vacuum for power brakes and no lowend torque.
He's wanting to swap in a new cam(201/207 or single pattern 207) or swap the stock TBI 350 cam back in. Anyone have experience with swirl-ports and what works best?
The stock manifolds will stay, because he is planning on a front mount turbo kit in the future. And because of that, he thinks his gearing is fine(mind you, he's still running ten bolts).
His main complaints are not enough vacuum for power brakes and no lowend torque.
He's wanting to swap in a new cam(201/207 or single pattern 207) or swap the stock TBI 350 cam back in. Anyone have experience with swirl-ports and what works best?
The stock manifolds will stay, because he is planning on a front mount turbo kit in the future. And because of that, he thinks his gearing is fine(mind you, he's still running ten bolts).