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So I have heard a lot of people around the shops saying that an upgraded throtle body on a FI supercharged or turbo is not going to make a big diffrence in HP and performance. Any thoughts on this? Also I have seen spacers for them any thoughts on them for FI engines?:confused:
 

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I've been hearing that an upgraded TB is only going to make a difference in FI cases and not make much of a difference in non FI cars.

the spacer on the other hand I've heard is a complete waste of money, which makes sense since all the spacer does is add more length air must travel before it gets to the motor.
 

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The spacer will make a good paper weight if you need one.

A Throttle body does help on FI applications but is most useful on roots/tvs type blowers that are sucking in air before the blower. It can become a major restriction in the line.
 
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