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Re: RetroTek fuel injection system
[Re: 375inStroke]
#89729
07/18/08 08:03 PM
07/18/08 08:03 PM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
Why do you need good vacuum for street with a TBI and not a SMPI? Does the fact that the injector is squirting fuel at the back of a closed intake valve over 50% of the time at WOT with a SMPI negate the advantages of even air/fuel distribution. I'm thinking of going with a Holley 4bbl TBI and a Megasquirt system. I can't put fuel rails on an old car. It just looks like [Edited by Moparts - Keep it clean] to me.
The point is when you hit the throttle, a map sensor for either tbi or mpi will instantly detect a vacuum change, but with a tbi, the engine still has to suck the fuel from the throttle body, down the runners to the valve. With port efi the fuel is right there. There is no delay in transit time. TBI will still be more responsive than a carb, but still not as good as port injection. It's a good middle ground, especially if you don't like the look of fuel rails. 
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