Has anyone ever tapped the side of the 1" inlet (filter housing) on a Q-Jet to hook up a sender unit for an electric Autometer fuel pressure gauge? Obviously, I'd not be using a filter in there if I do it, but basically want to know if the fuel pressure inside that tube would be as accurate as in the line that goes into it from the pump. I think the tube is a little larger inside in diameter than the line, so am thinking the pressure reading might drop(?). It may not sound like the normal thing to do, but I'd like to (1) get a good reading near the carb, and (2) keep it as stealth as possible under the air cleaner for a nice "factory" look.
I think that will work, but I found it easier to just buy a fitting with the hole already tapped. Drilling a hole in the filter housing and tapping it might not get you many threads and might leak or strip on you, possibly. I have -6AN braided hose between my pump and carburetor. I also have a Russel fitting that replaces my filter housing and gives you a male -6 connection. The small fitting goes in between and provides the 1/8 NPT hole to mount the sender for my electric Autometer fuel pressure gauge sender.
Thanks for the input. I have an extra filter housing so am going to give it a try. I like the setup like yours, Larry, as it is certainly more foolproof, so I may end up doing that before long. :TU:
[SUB]be sure and install the extra housing on the carb your using, then mark where you want the sender to be before drilling .[/SUB]
This is the part that replaces the filter housing, screws right in in place of the filter housing. http://www.summitracing.com/parts/rus-640340 This screws right on and provides a tap for a fuel pressure sender. http://www.summitracing.com/parts/rus-670343 If you need an actual picture of mine installed, I'll take one.
No, those two part number make it pretty self explanatory. Only other question I have is where you put the fuel filter that takes the place of the one in the fuel inlet? And, what filter do you use? I'm using a stock stage 1 fuel pump, by the way, with a stock steel line going from pump to carb. I was thinking of just cutting the line somewhere down around the timing cover and flaring it to accept a Russell filter. What would you advise? I also just noticed that the female fitting is -6 AN. Is there an adapter that will allow me to use the stock steel fuel line?
We have the long Buick filter housings in brass so they are easy to drill and tap for a gauge line, and/or to drill out at the inlet and tap for NPT threads to run AN fittings. We do this all the time, they are easy to drill, tap and modify compared to the factory steel fittings. I use and prefer 8AN vs 6AN to supply the q-jet for drag racing and high HP applications, based on the "too much is just right" mentality.......Cliff
If you want to use the steel line, I would do as Cliff suggests and skip the adapters I used. As far as a filter goes, it is built into the braided line, sits right under the distributor. JW put the whole thing together for me. It's a billet aluminum deal that has -6AN ends, you can take it apart to service the element. The line can be used for both of my carburetors, takes 15 minutes or less to swap between them.
Are you Cliff Ruggles, by chance? You're the one that actually rebuilt this Q-Jet back in 2010... seriously just about the best money I've EVER spent on ANYTHING. All I had to do was set the initial idle and it's been perfect ever since; as close to EFI as a carburetor could ever get. Anyway, that's a good idea to use a brass housing. I'll be place and order from your page. Thanks!
I'll have to look into that. I was just going to run an inline filter down in the frame where the two factory steel lines meet. I may be upgrading all the lines and pump (maybe) soon anyway. The reason I'm hooking this gauge up is because the engine falls over in 2nd gear sometimes at WOT. The fuel system is stock except for the TA Performance 1534C street/stripe chrome mechanical pump. My guess is I'm just running out of fuel as the engine never stalls (no way it could be the carburetor). The sock in the tank is probably the original and should probably be replaced... along with the factory lines. Maybe it just needs a supplementary electric pump to push from near the tank (?).
Yes, I have the same type of fuel filter (-8AN) installed before the pump. The CV mechanical pump doesn't like any dirt. I think the TA pump is borderline. Not sure if you can run a pusher pump with that pump. I know you can with the stock Stage1 pump. I am running the Rob MC pickup and -8AN push lok hose to the pump. Braided -6AN from pump to carburetor. CV mechanical pump I got from Jim Weise at Tri Shield Performance, http://www.cvproducts.com/ProdDet.aspx?PN=SPIN-MP-2509 Jim put a Buick arm on it. See post #2, http://www.v8buick.com/showthread.php?277370-BBC-Mechanical-Fuel-pump&highlight=cv+fuel+pump
"Are you Cliff Ruggles, by chance?" That would be me. I wonder over here on occasion to help out where I can......tks.....Cliff
