kirbans 2 cents worth
A little history on adjustable fuel regulators. First comments above are dead on especially one about being able to adjust it kind of like having an adjustable wastegate actuator.
I have always been told the full picture would be to have volume and pressure. To achieve that you need a good pump/sock and consistant volts delivered to the pump and adjustable regulator at the front.
Don't overlook the fuel filter one area of neglect on late model cars as every used car I have bought I have to change. The mechanic can tell if it has ever been replaced.
The most popular adjustable fuel regulator is one we have sold for many years. The heart of it is the diapham is made from a material that holds up under any fuel. All billet construction. Looks 100% identical to the factory one on the outside. I am sure it is sold by other sources as well.
We also had them made for 5.0 Mustangs starting way back in 1991 and we also had made 4 different versions for the Porsche market.
They also look pretty if you keep it polished.
The first two old tricks when the cars were new they used to do with the stock one is to crush the top. That gave no adjustment after you crushed it. The next design back when the cars were fairly new was an insert was put in the vacuum port on the top that you screwed down or up. That was not very effective as it would fail to hold over a period of time.
The next version that was popular and worked great was sources like us would buy the stock ones and cut off the tops and a new billet top was installed.
That is about the extent of my knowledge on the fuel regulators. I can tell you this, the reason you see an all billet today is because we made them first for the 5.0 Mustangs and sold thousands of them over the years to Mustang companies.
That paved the way to tool up to make an all new one for Turbo Regals. While the Porsche market is a lot smaller, we can charge more for them as we sell to tuners that use it with the rest of whatever upgrades they are doing. Mot regulators are Bosch units reason it crosses over basically the same principle no matter what performance car it is on. Owners want to achieve the same results - more power to the street.
kirbanpeformance.com
denniskirban@yahoo.com
not a mechanic, know a little about the above subject.
