Patcon Posted December 5, 2023 Share #25 Posted December 5, 2023 Hopefully that does the trick Link to comment https://www.classiczcars.com/topic/68285-75-280z-updating-fuel-feed-return-lines-in-the-engine-bay/?page=3#findComment-659950 Share on other sites More sharing options...
darom Posted December 5, 2023 Share #26 Posted December 5, 2023 I hope so too, I just ordered the same fuel rail from Protunerz. That chamfer for the o-ring will be the first thing I will be checking when I get the part. Link to comment https://www.classiczcars.com/topic/68285-75-280z-updating-fuel-feed-return-lines-in-the-engine-bay/?page=3#findComment-659952 Share on other sites More sharing options...
HusseinHolland Posted December 6, 2023 Author Share #27 Posted December 6, 2023 (edited) On 11/17/2023 at 8:25 PM, Zed Head said: The "dead" part of the deadhead is the non-moving fuel in the rail. Dead flow. If the fuel doesn't pass through the rail, in one end and out the other, then it's a deadhead system. Apologies, I was looking at the return vs return-less aspect of that debate. I don't see any disadvantage to this setup, if that was why you were pointing it out, or because I wasn't getting the point? The one link posted seemed more concerned with carbureted setups, which is a whole 'nother ballgame, IMO. I would expect it would be unwise to use a stock style diaphragm version FPR for such a setup though. Volvo used this setup from the early 90's until the early 2K adoption of in-tank PWM controlled units. Removes the need for additional fuel lines on the motor, and removes the potential heating of the regulator and fuel returning to the tank. I haven't had any heat soak issues since switching to the billet rail and composite injectors. Improved starts, however the starter crank speed has a variable in that equation... Edited December 6, 2023 by HusseinHolland Link to comment https://www.classiczcars.com/topic/68285-75-280z-updating-fuel-feed-return-lines-in-the-engine-bay/?page=3#findComment-659984 Share on other sites More sharing options...
Zed Head Posted December 6, 2023 Share #28 Posted December 6, 2023 I was just properly defining the words. You can't have a good debate if people use the wrong words. 1 Link to comment https://www.classiczcars.com/topic/68285-75-280z-updating-fuel-feed-return-lines-in-the-engine-bay/?page=3#findComment-659993 Share on other sites More sharing options...
HusseinHolland Posted December 9, 2023 Author Share #29 Posted December 9, 2023 (edited) Swapped out the ProTunerZ rail today. Old one in foreground Easy swap out. Injectors stay put. 2 -6 AN fittings and the 2 hold downs on the intake. Countersunk the first one (hand cut, no chatter or burrs) ProTunerZ didn't want it back. Oring seats properly now (in the old one) Edited December 9, 2023 by HusseinHolland 2 Link to comment https://www.classiczcars.com/topic/68285-75-280z-updating-fuel-feed-return-lines-in-the-engine-bay/?page=3#findComment-660066 Share on other sites More sharing options...
darom Posted December 9, 2023 Share #30 Posted December 9, 2023 My protunerz fuel rail has the same shallow o-ring surface for the CSV line. @HusseinHolland what is the name of the drill bit you used on yours? It looks like a deburring bit (45 degree?). I am heading out to Home Depot, will look for one. Thanks! Link to comment https://www.classiczcars.com/topic/68285-75-280z-updating-fuel-feed-return-lines-in-the-engine-bay/?page=3#findComment-660080 Share on other sites More sharing options...
HusseinHolland Posted December 10, 2023 Author Share #31 Posted December 10, 2023 8 hours ago, darom said: My protunerz fuel rail has the same shallow o-ring surface for the CSV line. @HusseinHolland what is the name of the drill bit you used on yours? It looks like a deburring bit (45 degree?). I am heading out to Home Depot, will look for one. Thanks! Sorry didn't see this earlier. It's a countersink bit, I think they are typically 82º, so not aligned with the 37º JIC fittings, but it still works Link to comment https://www.classiczcars.com/topic/68285-75-280z-updating-fuel-feed-return-lines-in-the-engine-bay/?page=3#findComment-660086 Share on other sites More sharing options...
darom Posted December 10, 2023 Share #32 Posted December 10, 2023 Thanks! I guess if the opening is 6 AN/ 0.34 in, I will need a 3/4 in countersink bit. Link to comment https://www.classiczcars.com/topic/68285-75-280z-updating-fuel-feed-return-lines-in-the-engine-bay/?page=3#findComment-660088 Share on other sites More sharing options...
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