Posted: 4/7/2010 7:55:15 PM EDT
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Im a noob at cars and such, but i drive a silverado 1500 from 1990. I replaced the starter with an oem one cause it needed to be. Anyways, you know when you hear those performance cars start up, they barely crank and they're ready to rock. You know what i am talking about, turn the key, cranks like once or twice and its started. Anyways, what sort of starter or whatever would i need to get for it to start like that? I know this is sort of silly, but i am genuinely curious. Would i need one of those higher end starters?
Thanks! |
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The starter motor will only crank(spin) the engine at a certain speed. To get the engine to start first piston up depends on how fast the fuel pressure builds up in the fuel system. The fuel pump has to pressurize the system and try to clear all bubbles out on the initial start up. The fuel pump runs a few seconds when the ignition is turned to the run position. Sometimes the starter has to be bumped for the Fuel pump relay to run. If you have a throttle body injector it takes a few revolutions to pull the fuel mist to the cylinders. It would not be worth it to get it to start first piston up. As long as it starts and runs like it was designed to I would not worry about it. You could cycle the key once and listen for the pump to shut off and then cycle it off then on and then start the engine. I do this to get empty fuel systems to purge after working on them. Basically you are cycling the fuel relay to pump the fuel system full. High performance Fuel Injection and Carburetors don't have to meet all the different emmisions and drivebility requirements and can be sized to start almost instantly. They also have high compression to ignite the fuel air mix first piston up. My 2 cents. |
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Quoted:
The starter motor will only crank(spin) the engine at a certain speed. To get the engine to start first piston up depends on how fast the fuel pressure builds up in the fuel system. The fuel pump has to pressurize the system and try to clear all bubbles out on the initial start up. The fuel pump runs a few seconds when the ignition is turned to the run position. Sometimes the starter has to be bumped for the Fuel pump relay to run. If you have a throttle body injector it takes a few revolutions to pull the fuel mist to the cylinders. It would not be worth it to get it to start first piston up. As long as it starts and runs like it was designed to I would not worry about it. You could cycle the key once and listen for the pump to shut off and then cycle it off then on and then start the engine. I do this to get empty fuel systems to purge after working on them. Basically you are cycling the fuel relay to pump the fuel system full. High performance Fuel Injection and Carburetors don't have to meet all the different emmisions and drivebility requirements and can be sized to start almost instantly. They also have high compression to ignite the fuel air mix first piston up. My 2 cents. Thanks! |
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Ive noticed that a fuel injected engine typically doesn't start as quick as a warmed up carberated engine in good tune.
My theory to explain this is that when you shut off a EFI engine as the motor spins down is does so "dry" because the fuel pump and injectors cut out with the ignition, You'll really notice this on a setup such as your TBI truck with a "wet" intake system On a carbed motor air fuel mixture is still being sucked into the cylinders as the engine spins to a halt. meaning that when you start the thing back up a couple cylinders will be charged with air/fuel and on the way up on compression within the 1st revolution. My old 300 powered F100 prolly didn't turn over twice on the starter before it was running, all I had to do was literally bump the swich |