I was asked about non-stock Fuel lines and a Adjustable Fuel Pressure regulator

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20 Jul 2013 13:13 #15372 by 928mac
So far to date I do not seem to have had any negative draw backs from this modification, but its only been about 2-3 years. (june 21/2011)
I do not have any dampeners though and have not experienced and fuel pulsation issues, to my knowledge.

I replaced the line in the front with a straight steel braided line.
From the back of both fuel rails to the sides of a AFPR mounted on the drivers strut tower.
out from the center of the AFPR to the AC cooler at the firewall.

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I made this elbow with the end of the original hose braised onto steel line
and the SAE fitting for the hose

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Yip, ... no mass air flow either

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I drilled and tapped directly into the fuel rail and mounted the gauge where I could see it while adjusting.
Also I should have mounted the gauge further forward as it interferes with the factory air box
CAUTION If the gauge fails or anything leaks, including your lines, I can not be responsible.
I check my lines and gauge weekly by running my hand around them checking for leaks. I recommend this with all fuel system repairs.

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20 Jul 2013 20:06 #15374 by mm928
Nice looking stuff Mac, but as a 16v'er...not exactly sure what all I am looking at! HA

1983 928S - 16v 4.7L L-Jetronic
Dark Grey w/ Blue Leather
85/86 exhaust manifolds
Y-Pipe
SS Hi-perf Cat
S4 springs
Bilstein shocks
Air pump delete
VIN: WP0JB0926DS861180
- - Isn't Life great? - -

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22 Jul 2013 19:55 #15402 by Normy1
Very nice work! I like the colors.

I have the same FPR on my '85 S2. The LH 2.2 on this car was woefully inadequate; Due to the airflow, stock you either ran lean at full power and max rpm or or ran way rich at low rpm and part throttle. The FPR allows you to set the idle mixture via the pot on the MAF very lean, while your engine receives additional [proper] fuel at full throttle/rpm.

Via the A/F gauge I have installed in the glove box, I've been able to prove this. The trick was spending some time via trial and error, drive and adjust until I got it to run right. It doesn't stink like an old school bus at stop lights, yet doesn't hesitate at all to pin me back in the seat.

N

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