2006-06-20 14:12:48 · 4 answers · asked by drifter21905 1 in Cars & Transportation ➔ Maintenance & Repairs
The carb will work fine.
GMC didn't use fuel injection untill '87. If you are putting an '87 or later engine in your '85 just use the intake, carb and distributor from your old engine. All will fit.
The fuel injection camshafts have a very mild duration to help vacuum. The map sensor type of fuel injection is mostly dependent on vacuum to determine load (fuel amount). An aftermarket cam with more duration will throw of the calibration of the computer and it will run rich. But a carburator will work just fine. The ignition timing on a fuel injected engine is controlled by the computer so you will also need a pre '87 HEI distributor with vacuum advance.
2006-06-20 14:31:15 · answer #1 · answered by Jimfixer 2 · 0⤊ 0⤋
No,but why would you want to change?There should be no difference exept a lose of some power only becuse (Tuned port injection) TPI ,is a more controled and presislely mesured amount of fule to the combustion chamber.Where carburetor fed engines require more maintnance.Like the jets.I geuss if you went with a factory Rochester quadrajet carb its more apt to be maintnace free.Still tpi is the way to go.Thats my opinion though.
2006-06-20 21:35:41 · answer #2 · answered by Anonymous · 0⤊ 0⤋
No, you do not. Why are you going with a carb? No matter, if you go with a carb, the best one I know of is a carter thermoquad. You can find one on a dodge 360. Look for an old van or power ram to get it. Nothing will beat the mileage and perfomance.
2006-06-20 22:47:56 · answer #3 · answered by jeff s 5 · 0⤊ 0⤋
just change the intake my need to drill the center bolt holes on the intake to line up on the block
2006-06-20 23:55:21 · answer #4 · answered by john c 1 · 0⤊ 0⤋