A bit late to start this thread but what the hell. So I bought the Holley Sniper back in August but decided I'd make it a winter project so I'm just getting around to starting the install. The thing cost about $1200. But of course, as with everything else, that is only the starting point. So in talking with some other guys on EFI forums I was told I would need to update my charging system from the old 37amp alternator and remote voltage regulator. If you've read my other post, you know that I've now installed a 94 amp unit with internal regulator and upgraded my wiring a bit. Yesterday I got under and pulled my old Holley elect fuel pump and the system I had installed awhile back to counteract the fuel starvation issues I've had at the racetrack. Dropped the gas tank and swapped the sending unit with the one I modified to connect to the new external fuel pump. Fabbed the mount for the pump. Now I'm ready to stuff it back up in the car. Maybe I'll get it back in tomorrow and get the hoses put on. Once I get it back in I'll wire it up to a relay as well. I'll update this as I go along.
I wanted to buy a complete kit so I went with the external pump. Everybody says the Tanks with the Walbro pump installed is the way to go but it meant ordering that separately and more expense so this the way I went and now I'm stuck with it( at least until the pump gives up). Should be fine. I've heard from guys that have been running this way for years without issue.
More of a concern for me is if the system will be able to adjust to my driving conditions. Different parameters can be tuned in but with the cheaper systems there is only so much that can be done.
Ok, had a fairly frustrating day in the garage yesterday. I put the gas tank back in the car with the sending unit that I modified for the new pump setup. The EFI is setup to use 3/8" lines for the feed and the return lines. I had just installed a stock 5/16" return line with the last motor install so I figured that should be adequate. The return only carries 3psi, not sure what kind of volume, but it's free flowing so I'm hoping it doesn't cause a restriction. Just have to adapt the 3/8" hose to 5/16" hard line. So you try to explain to the girl at twilight zone that you need fuel injection hose, not just regular old fuel hose ( what kind of car is it for? Is it a 2 or 4 door?...UGH!). Anyways get the tank in and start to hook up the hoses and that's when I realize the replacement sending unit I used has a 1/4" return line installed on it. WTF?? Tank comes back out. Now I have to modify my original sending unit that I added the 5/16 hard line into. Of course it's all stainless so I can't get solder to stick. Meanwhile some other [censored] gets broke while I'm dicking around with it. CRAP! Two trips to the hardware store. I finally get it back together install it in the tank, back in the car. Get my hose run and everything clamped. Whew! Onward ho. Next up, pull the intake to notch the divider and reinstall. Then I think it will be time to drop the throttle body on and run the fuel lines to it. Stay tuned. (Pic is the 5/16 to 3/8 barbed hose adapter)
my efi went pretty smooth.. I'm waiting on some hall effect tach chip.. they say the tach signal is unreliable from the HEI... I also went with a edebrock sump kit.. be interesting to see how that works...