Free FMU mod: How do I do it with a boost gauge hooked up?
Apr 19, 2005 | 12:17 PM
#1
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Free FMU mod: How do I do it with a boost gauge hooked up?
As I get closer to selling the 97 and getting my SC'r back from Magnuson, I am beginning to map my plan of attack. Here is an exerpt from Gadget's site:
I already have the boost gauge installed in my rig, and I already know that it plugs into the port that gadget is speaking of in his article. So I am wondering if there is any other way to get the free FMU mod to work. Does anyone know?
Originally Posted by gadget
With the FPR hooked to the boost port it will react to boost pressure and increase the fuel pressure under boost at a perfect 1:1 ratio. This offsets the boost pressure differential that I discussed earlier and really does a good job of stabilizing the fuel pressure in relation to manifold or boost pressure. The funny thing is that all the other fuel injected engines I have toyed with has the FPR connected to a port that allows it to read and adjust the fuel pressure in relation to engine load (manifold pressure).
Here is the benefit with the TRD supercharger. Like I explained earlier, as the manifold pressure increases in boost it will restrict fuel flow from the injectors. By reconnecting the FPR to the boost port you prevent this problem and it will give you 6-7 PSI of extra fuel pressure at max boost that you did not have before. Many people with the dreaded pining problem have tried this and it has in some cases eliminated the high gear, low RPM ping. All have reported an improvement.
Here is the benefit with the TRD supercharger. Like I explained earlier, as the manifold pressure increases in boost it will restrict fuel flow from the injectors. By reconnecting the FPR to the boost port you prevent this problem and it will give you 6-7 PSI of extra fuel pressure at max boost that you did not have before. Many people with the dreaded pining problem have tried this and it has in some cases eliminated the high gear, low RPM ping. All have reported an improvement.
Apr 19, 2005 | 12:47 PM
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I thought of that, but won't that decrease the indicated reading on the boost gauge?
Also, the boost gauge has a pretty heavy duty threaded fitting with sealing tape, so I am not sure how I would properly "plug" it in with a T. You know what I mean?
Also, the boost gauge has a pretty heavy duty threaded fitting with sealing tape, so I am not sure how I would properly "plug" it in with a T. You know what I mean?
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Apr 19, 2005 | 09:17 PM
#11
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From: Seattleish, WA
Originally Posted by <96 Runner>
Anybody feel like posting a "T" part # or where I should be looking to get this T? 
Head to Schucks, Napa, AutoZone, etc. and look for the spinny-racks of things like plastic door panel fasteners, screws, vacuum T's, vacuum Y's, etc.
They come in various sizes, so bring a piece of the line with you.
Apr 21, 2005 | 08:45 AM
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From: Scottsdale, AZ
Originally Posted by loosehead
So, I am away for while and next thing you know Christian is getting a S/C...Cool! It will be interesting to here how you like it.
Apr 21, 2005 | 10:29 AM
#16
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From: Seattleish, WA
Originally Posted by loosehead
So, I am away for while and next thing you know Christian is getting a S/C...Cool! It will be interesting to here how you like it.
Apr 22, 2005 | 08:08 PM
#18
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From: SLC, UT
Originally Posted by loosehead
So, I am away for while and next thing you know Christian is getting a S/C...Cool! It will be interesting to here how you like it.
I just T'ed mine and the boost gauge works great!
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