Fuel lines and fittings
Discussion
E-bmw said:
On the subject of what to do next to get a better arrangement there is only 1 possible solution I can think of.
If you were to get a plenum made up above the front 4 with short straight intake tubes, but ensure it isn't too big so as to limit access for the bolts underneath, you could then get 2 x 90 degree intakes to go towards the rear 2 intakes.
Depending on preference you could then either use 1 or 2 intakes towards the front of the car, or 1 pointing towards a bonnet/scuttle intake and a foam panel filter sized to suit.
That's what I have in mind although I was thinking an ITG sponge filter on top with two holes for the rear two pipes or had contemplated using a K&N custom filter cut down with a solid face to the rear with two pipes out but that was widely criticised.... If you were to get a plenum made up above the front 4 with short straight intake tubes, but ensure it isn't too big so as to limit access for the bolts underneath, you could then get 2 x 90 degree intakes to go towards the rear 2 intakes.
Depending on preference you could then either use 1 or 2 intakes towards the front of the car, or 1 pointing towards a bonnet/scuttle intake and a foam panel filter sized to suit.
stevieturbo said:
Simplest is literally just make up a base plate for a filter onto the existing alloy bends, then get a filter to suit
My other option Steve, I've cardboard templates for the ITG JC 200 and 300 filters using a solid back plate cut to suit.Pulling the fuel lines into the side of the TBs makes that option easier but it's still a close fit to the underside of the bonnet.
Project on hold until I sort out the fuel tank disaster.
Could old petrol, or maybe there's been some E10 put in and left, really have rotted the brass drain plug? I find it very hard to believe but also find it hard to believe that Tony would have wrenched it so tight, to the point of shearing and left it. He was simply too good an engineer to do that.
stevieturbo said:
Really wouldn't worry about the length of the trumpets.
I'd rather a neat fit and finish, easy to work on, than a few mm difference in runner length which in reality will make negligible difference.
If it looks right it is right, aesthetics matter. So does access to the plugs and dip stickI'd rather a neat fit and finish, easy to work on, than a few mm difference in runner length which in reality will make negligible difference.
The drain plug was leaking, I literally touched it and it fell on the floor followed by the contents of the tank. Tank removed yesterday, cleaned up today, refitted with a loose plug which I'm going to refix with Loctite 243. Hopefully that shall be it but I'm only putting half a gallon in at first....
Oh and it's not the original tank by the looks of it.
Just to conclude:
Got there in the end, having considered top filter in a custom box, custom box with side entry, pannier filters (K&N SU-1200) I ended up tidying Tony's original set up. Which ever way I went the bulkhead, bonnet clearance, oil filler, alternator, bonnet catch caused a problem. I still have trouble accessing the dip stick, If anyone can suggest a longer, more flexible one for an Essex V6 please shout up.
Thanks again to everyone who offered suggestions along with Demon Tweeks for the fuel fittings and Stoney Racing for the silicone pipe and advice.
Got there in the end, having considered top filter in a custom box, custom box with side entry, pannier filters (K&N SU-1200) I ended up tidying Tony's original set up. Which ever way I went the bulkhead, bonnet clearance, oil filler, alternator, bonnet catch caused a problem. I still have trouble accessing the dip stick, If anyone can suggest a longer, more flexible one for an Essex V6 please shout up.
Thanks again to everyone who offered suggestions along with Demon Tweeks for the fuel fittings and Stoney Racing for the silicone pipe and advice.
Sorry, thread resurrection and update.
Ever since setting the system back up I've had problems with the car seeming to run rich and fouling one or more plugs.
Never quite got to the bottom of it but think I may have finally found something.
The whole installation was installed before I bought the car.
The set up:
Twin fuel tanks, interlinked.
Facet LP pump under one tank (filter between tank & pump) feeds a OBP swirl tank. A HP fuel pump draws from the swirl tank and feeds one side of the three TBs and a return pipe goes back to the swirl tank.
A run out today (to arrange an MoT on another car) . Car started OK, I usually then flick the switch on the dash which until today I thought was the HP pump but today forgot. Six mile up the road, the car went like a dream. Reached over to flick the "fuel pump" switch and immediately there was a difference so flicked it back off. Three mile return the same then it started to shudder. Broke down 3 times in the last three miles. When I got home, plugs out, for the first time they were a nice golden brown colour rather than gooey black.
What I've found out today is the "fuel pump" switch on the dash is for the LP pump, the HP pump is switched on from the ignition key.
The connections to the swirl tank are not totally correct. Should be:- top= overflow back to tank, 2nd= Fuel rail return, 3rd = inlet from tank, bottom = feed to fuel rail. The middle two, fuel return and feed from tank are swopped so that the fuel rail return is below the inlet from the tank.
I have a pressure gauge on order, the regulator hasn't got one, but it would seem that the first 9 miles was run on the contents of the swirl tank which eventually emptied. I can but assume that the LP pump is somehow overloading the system or the swirl tank connections are causing an overload.
The pressure regulator is located after the TBs/injectors.
AS an aside, I had considered going back to a 38DGAS and removing the Jenvey TBs as the TBs exclude the car from the "Classics" class in Hillclimbs but that's all for the future if I don't sell the old girl first.
Ever since setting the system back up I've had problems with the car seeming to run rich and fouling one or more plugs.
Never quite got to the bottom of it but think I may have finally found something.
The whole installation was installed before I bought the car.
The set up:
Twin fuel tanks, interlinked.
Facet LP pump under one tank (filter between tank & pump) feeds a OBP swirl tank. A HP fuel pump draws from the swirl tank and feeds one side of the three TBs and a return pipe goes back to the swirl tank.
A run out today (to arrange an MoT on another car) . Car started OK, I usually then flick the switch on the dash which until today I thought was the HP pump but today forgot. Six mile up the road, the car went like a dream. Reached over to flick the "fuel pump" switch and immediately there was a difference so flicked it back off. Three mile return the same then it started to shudder. Broke down 3 times in the last three miles. When I got home, plugs out, for the first time they were a nice golden brown colour rather than gooey black.
What I've found out today is the "fuel pump" switch on the dash is for the LP pump, the HP pump is switched on from the ignition key.
The connections to the swirl tank are not totally correct. Should be:- top= overflow back to tank, 2nd= Fuel rail return, 3rd = inlet from tank, bottom = feed to fuel rail. The middle two, fuel return and feed from tank are swopped so that the fuel rail return is below the inlet from the tank.
I have a pressure gauge on order, the regulator hasn't got one, but it would seem that the first 9 miles was run on the contents of the swirl tank which eventually emptied. I can but assume that the LP pump is somehow overloading the system or the swirl tank connections are causing an overload.
The pressure regulator is located after the TBs/injectors.
AS an aside, I had considered going back to a 38DGAS and removing the Jenvey TBs as the TBs exclude the car from the "Classics" class in Hillclimbs but that's all for the future if I don't sell the old girl first.
Fuel pressure is 42lb/ft with the engine off, drops a little at start up. No discernible difference switching on the LP pump.
Next up switch over the two connections on the swirl pot.
Edit: OBP say the two connections (feed from tank & return from engine) being incorrect shouldn't be causing a problem.
Next up switch over the two connections on the swirl pot.
Edit: OBP say the two connections (feed from tank & return from engine) being incorrect shouldn't be causing a problem.
Edited by Skyedriver on Friday 22 March 07:58
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