Thread: Wiring caspers fuel pump hotwire into a gt without speed relay.

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  1. #1 Wiring caspers fuel pump hotwire into a gt without speed relay. 
    GXP Level Member suitercrew's Avatar
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    Hey guys I just bought the caspers hotwire setup I was reading through the directions and it talks about wiring into the fuel pump speed relay that is in the fuse box in the engine bay on the gtp. The problem is I have a topswapped gt. The gt version did not have this relay so I'm trying to figure out how to install this.

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  2. #2 Re: Wiring caspers fuel pump hotwire into a gt without speed relay. 
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    You don't need it.

    The L67 cars has a relay to have the pump typically running at low speed and then at WOT it would go high speed. Your pump is one speed and life is good. You have no need to install it beyond aiming to upgrade the wiring.
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  3. #3 Re: Wiring caspers fuel pump hotwire into a gt without speed relay. 
    GXP Level Member suitercrew's Avatar
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    Ya I just got it for a good price and was wanting to install it for the voltage increase. In running an e85 setup with a 3.3 pulley so I'm pretty sure I'm right on the border of running out of fuel . I'm wanting to through can in the car to but I know the stock pump will never keep up with that kind of demons so I'm slowly upgrading all my fuel system for when I need it

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  4. #4 Re: Wiring caspers fuel pump hotwire into a gt without speed relay. 
    GXP Level Member suitercrew's Avatar
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    Quote Originally Posted by BillBooost37 View Post
    You don't need it.

    The L67 cars has a relay to have the pump typically running at low speed and then at WOT it would go high speed. Your pump is one speed and life is good. You have no need to install it beyond aiming to upgrade the wiring.
    It still boosts the voltage though correct? So that is why I want to install it.

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  5. #5 Re: Wiring caspers fuel pump hotwire into a gt without speed relay. 
    I can't car too good. SaukRapids's Avatar
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    Quote Originally Posted by suitercrew View Post
    It still boosts the voltage though correct? So that is why I want to install it.
    Well, technically you're lowering the resistance by installing better wire, but yes the current will flow better.
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  6. #6 Re: Wiring caspers fuel pump hotwire into a gt without speed relay. 
    GrandPrix Junkie ItHurtz's Avatar
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    caspers doesnt mention anything for the fuse box, + to the alternator and they give you a plug with a U wire where you would take off the resistor and plug their U wire plug into that, which is null and void for a gt.
    2000 GTPT Sold-brandonhall10 built trans
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  7. #7 Re: Wiring caspers fuel pump hotwire into a gt without speed relay. 
    GXP Level Member suitercrew's Avatar
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    Quote Originally Posted by ItHurtz View Post
    caspers doesnt mention anything for the fuse box, + to the alternator and they give you a plug with a U wire where you would take off the resistor and plug their U wire plug into that, which is null and void for a gt.
    I emailed intense and they replied. "I think you would just leave it disconnected"

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