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Old 29-05-2007, 07:10 AM   #46
lantisv62500
Junior Member
 
Join Date: May 2007
Location: Auckland,NZ
Car: Lantis Type R Sedan
Posts: 11
Adjustable fuel regulator are generally seen as a way of providing more fuel or for fine adjustment, but as with all short cut mods can make more problems if the pressure is increased too much or too little.
Something that is always overlooked is the fuel filters and the fuel pump.
By increasing the pressure are you going to get more FUEL VOLUME.
For a short period YES but then the fuel pump may not be able to maintain the volume required and then the mixture will lean off causing you much more expensive issues.
When I upgraded to a KLZE the standard V6 2litre fuel pump was not up to the job at all. (Major leaning out after 4000rpm)
I replaced the standard item with a higher volume in-tank fuel pump from a Nissan Skyline GT which I think was rated for up to 400hp engines.
(Very easy mod to do.)
Fuel pressure / volume issues GONE, and performance great and no affect on economy.
I have a air/fuel meter installed (have confirmed accuracy) and the mixture ratio are now controlled very well.
If you are going to do the FPR or increase your fuel pressure adjust it on a Dyno so that the affect on the air/fuel mix is monitored.
A little bit spent now may save a lot in the future.
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