Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

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tr7v8mike
Michael Booth
Sydney, Australia
(5 posts)

Registered:
02/22/2015 10:26PM

Main British Car:
1981 TR7 Rover 4.6

Adjusting fuel pressure
Posted by: tr7v8mike
Date: January 15, 2018 04:30PM

Hi,
I'd appreciate some advice on setting up the correct fuel pressure. I have a TR7 with a warmed up 4.6 RV8 with Lucas 14CUX FI and a Tornado chip. I've just overhauled the fuel system: surge tank, Bosch 254 911 pump which gives 4 bar pressure, new filter, new lines and an inline pressure gauge. On the advice of Mark Adams (Tornado) I installed a manually adjustable fuel pressure regulator from a Jag XJS. IN place of the vacuum line it has a screw which adjusts the pressure. I set it to 30psi with the engine off and the pumps running. Is this right?

I've also read in various places that these systems need somewhere between 50 and 60-something psi. What is the correct number and how do I set this up? I've scoured the web and can't find the information I want. The car is my daily ride and I take it on weekend track days.

Cheers

Mike


mstemp
Mike Stemp
Calgary, Canada
(186 posts)

Registered:
11/25/2009 07:18AM

Main British Car:
1980 MGB Rover 4.6L

Re: Adjusting fuel pressure
Posted by: mstemp
Date: January 20, 2018 09:53AM

As Mark developed the tune he would have done so based on a specific fuel pressure as this affects flow rate etc. No one here knows what Mark did so you will need to check with him.


tr7v8mike
Michael Booth
Sydney, Australia
(5 posts)

Registered:
02/22/2015 10:26PM

Main British Car:
1981 TR7 Rover 4.6

Re: Adjusting fuel pressure
Posted by: tr7v8mike
Date: January 21, 2018 03:36PM

Thanks Mike, he's a hard man to catch, but I'll give him a call.


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