I Lost 2-4 Psi Boost W/ Cfm+ And Grid Delete
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I Lost 2-4 Psi Boost W/ Cfm+ And Grid Delete
some of you already know i installed my cfm+ and grid delete yesterday and on the way home from the shop i had the chance to make a couple wot runs. the first thing i noticed was a boost loss. i have always been able to spike 30-35psi and hold 25-28psi. now it spikes just over 30 and only holds 24psi. i even took the truck out today to do some more testing and still only 24psi boost.
i know others have said they noticed a boost increase of 3-4psi w/ the cfm, but i lost 1-4psi. do you guys think it could have something to do w/ the grid delete? i would re-install the grid to check but......it kind of had a meltdown after doing an experiment to try and keep the grid operational w/ ALOT less restriction (this happened off the truck and is not related to my boost problem)
i know others have said they noticed a boost increase of 3-4psi w/ the cfm, but i lost 1-4psi. do you guys think it could have something to do w/ the grid delete? i would re-install the grid to check but......it kind of had a meltdown after doing an experiment to try and keep the grid operational w/ ALOT less restriction (this happened off the truck and is not related to my boost problem)
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#8
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I installed the cfm intake with a custom grid spacer and put the boost gauge back into the horn just like I had it stock . stock with grid heater I was at 50 psi now I am at 54 psi wot??? any ideas even bought a new gauge and hose still same
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most guys do report a boost increase. did you install the gauge at the same time? different gauges read different. otherwise maybee it does have something to do w/ the flow inside the horn??? i wonder if it causes a false reading? although i dont know if i could believe that....
anyway, i measure boost at the manifold via boost bolt, and i have definately lost boost. not much, but a loss none the less.
#10
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Your empirical data can not be disputed as it is what it is but there is nothing in the design of the air horn that should have caused the pressure to increase. Was the orientation the same, ie both on the top or both on the side? Also the way the hole was drilled in the stock horn could have been angled in such a way to increase the venturi effect where the CFM horn may be done in such a way to minimize the effect.
I like the boost bolt location on the intake as it is not in the direct flow.
I like the boost bolt location on the intake as it is not in the direct flow.
#12
some of you already know i installed my cfm+ and grid delete yesterday and on the way home from the shop i had the chance to make a couple wot runs. the first thing i noticed was a boost loss. i have always been able to spike 30-35psi and hold 25-28psi. now it spikes just over 30 and only holds 24psi. i even took the truck out today to do some more testing and still only 24psi boost.
i know others have said they noticed a boost increase of 3-4psi w/ the cfm, but i lost 1-4psi. do you guys think it could have something to do w/ the grid delete? i would re-install the grid to check but......it kind of had a meltdown after doing an experiment to try and keep the grid operational w/ ALOT less restriction (this happened off the truck and is not related to my boost problem)
i know others have said they noticed a boost increase of 3-4psi w/ the cfm, but i lost 1-4psi. do you guys think it could have something to do w/ the grid delete? i would re-install the grid to check but......it kind of had a meltdown after doing an experiment to try and keep the grid operational w/ ALOT less restriction (this happened off the truck and is not related to my boost problem)
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i doubt it would be leaking between the delete and the manifold because i used a new factory gasket and both surfaces were preped well. i could believe a leak between the horn and the delete because of the soft foam gasket cfm provides.
if i wanted to test, where would i install a fitting? i could remove the charge hose and make a fitting to test but wouldnt it leak down through the open intake valves?
if i wanted to test, where would i install a fitting? i could remove the charge hose and make a fitting to test but wouldnt it leak down through the open intake valves?
#14
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most guys do report a boost increase. did you install the gauge at the same time? different gauges read different. otherwise maybee it does have something to do w/ the flow inside the horn??? i wonder if it causes a false reading? although i dont know if i could believe that....
anyway, i measure boost at the manifold via boost bolt, and i have definately lost boost. not much, but a loss none the less.
anyway, i measure boost at the manifold via boost bolt, and i have definately lost boost. not much, but a loss none the less.