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YOUR RESEARCHAdjustable fuel pressure regulator
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Use holly
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I used Holly on my 1972 for 17 years with no problems.
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i asked this on the gt3 forum but no replies.
Has anyone installed one.
I'm looking for a reliable quality product. Any recommendations?
What do you guys think of the one pelican parts sells. Made by ecs tuning
Reads like then the pressure will be adjusted up so more fuel is injected per given amount of time.
Reads kind of well, odd or a back door way of adding more fuel without a tune, but what the heck.
The one for sale at Pelican Parts then should be ok if it allows you the adjustment range your mechanic says is needed. ECS Tuning has a good rep.
The variable fuel pressure strategy can be this:
1) Stock fuel pressure when the DME is in closed loop mode
2) Boosted fuel pressure when the DME is in open loop mode
Stock pressure in closed loop keeps the CEL from tripping.
Boosted pressure in open loop adds fuel and power.
Unnecessary. When torque demand is high enough the DME will ignore the #2 O2 sensor readings and supply the engine a richer fuel mixture. The mixture drops from around 14.7:1 (which is the air fuel ratio at which the converters are most efficient) to around 13:1 or thereabouts where the engine makes its best power. The DME doesn't need an increase in fuel pressure it just widens the injector pulse width a tiny fraction of time.
And when the injector pulse width grows, more fuel pressure means more fuel which could equate to more power. It's not just the DME that dictates the amount of fuel, the limitations of the mechanical parts - injectors and fuel pumps have to be considered too.
I agree with Macster, unnecessary. Your DME is already taking care of it. Also, too much fuel will reduce power. More fuel without more air to react with will only take up space in the combustion chamber and displace air.
You might want to do a google search on mixture vs. power and you can see for yourself.
