Tbi To Carb Conversion / 454ss
Posted 21 September 2007 - 08:18 AM
Posted 21 September 2007 - 05:43 PM
Posted 21 September 2007 - 06:53 PM
your going to need to disconnect the ECM and get an MSD ignition. Basiclly, you are converting your entire engine back to a basic big block.
with the carb you are going to lose some power, your going to have electrical gremlins galore, and you'll be continually screwing with things like idle and Air/Fuel ratios.
Don't get me wrong, I love carbs, But they're an outdated technology, and only good if your making massive amounts of power.
Your TBI will make way more power and be more reliable than a carb ever will. Your stock TBI flows 90lbs/hr/injector at 12psi. With 750 CFM. This is enough flow to power a 450hp big block. Your truck is like 255 stock. So your safe to make another 200hp before you out grow this unit.
I would get a set of new injectors and rebuild the TBI if I were you. those 18y/o injectors probably leak like a sieve now.
GM part # - 1704304 Red/blue top injectors.
so you expected something that weights 5000 pounds and has aerodynamics of a piano to get what?
2003 Silverado XCSB, 4.8L, Flowmaster super44 SI/DO, G80 3.42, MSD Wires, K&N drop-in filter, Yellow Top Battery, Royal Purple in entire Drivetrain, W4M tune....My DD..............................SOLD
2010 Silverado XCSB 5.3L Z71 Summit White, Diablo Trinity tuned....more to come soon.
2010 Cobalt 2.2L LT 2Dr. Victory Red....gas saver/wife's Car.......SOLD
2011 Cruze 1.4L Turbo 1LT Crystal Red ...Again, Wifes car and gas saver
1978 LJ80, 16V 1600cc on 31's, Spring over lift, awaiting Full Frame off build...The Toy
Posted 21 September 2007 - 08:38 PM