fuel pressure spring - Ford Powerstroke Diesel Forum

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post #1 of 17 Old 05-18-2009, 04:04 PM Thread Starter
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fuel pressure spring

gillett diesel offers a fuel pressure spring for the 6.0 had any one have one of these or knows if they do anything power wise? just would like to know before i order one? thanks in advance
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post #2 of 17 Old 05-18-2009, 04:13 PM
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post #3 of 17 Old 05-18-2009, 04:41 PM
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I used one and it is way to stiff has the fuel pressure pegged my 100 psi guage. ended up putting the original back in and streching it slightly works well now.

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post #4 of 17 Old 05-18-2009, 04:44 PM
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it is a waste of money , it does jack the pressure up , but in turn just makes fuel pump work harder , there is really no performance gain, with these injectors in these engine its not pressure increase that helps , its volume , there is a difference

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post #5 of 17 Old 05-18-2009, 05:33 PM
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Thats some good info.

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post #6 of 17 Old 05-18-2009, 06:20 PM
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Yes the higher pressure does make the pump work harder. The higher pressrue will decrease the flow because its trying to build more pressure with the stock fuel flow rate through the fuel paths. but it equals out. Just increasing pressure DOES NOT increase the FLOW with the SAME EXACT STOCK PUMP. You can do all you want but the effects are only going as great as the flow of the stock pump.
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post #7 of 17 Old 05-18-2009, 08:14 PM Thread Starter
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alright thanks everyone good info i figured it wouldnt do much with stock injectors and the stock pump but wanted to make sure thanks alot.
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post #8 of 17 Old 05-19-2009, 09:17 AM
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Just add a .177" BB between the spring and brass cup for a 7-10 psi gain.

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post #9 of 17 Old 05-19-2009, 11:58 AM
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Just add a .177" BB between the spring and brass cup for a 7-10 psi gain.
thats very creative
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post #10 of 17 Old 05-19-2009, 12:01 PM
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thats very creative
its a common mod in the 7.3's ive never heard of any one doing it to a 6.0.



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