Go get some, 82GT! - Page 2

~The Jester~ · 05-30-2006, 03:00 PM

Quote:

Originally Posted by 82 GT

OK, here is something interesting I found just now. I did a fuel flow test and it took the pump 33-34 seconds to fill 1 gallon container. THEN, I did the same test with my electric fan running and it took 40 seconds to fill it.
It seems when the fan is running, the pump loses power because of the fan.
Also, the pump gets much quieter when the fan is ON.

Well, There's your problem! 30 seconds to flow 1 gallon of fuel??? We're talking less than a quarter of that, ya know, ELEVEN! I can fill up a 5 gallon fuel can in that amount of time. Sure, I don't actually BURN that much, but if the motor wants it, IT'S THERE. With me bro? We figured out that my car would literally burn 1 gallon of fuel per pass. I was running 11.0's at the time. It takes you 30 seconds to flow 1 gallon?

BRAKE SPECIFIC FUEL CONSUMPTION. Learn it, live it, know it, love it!

And then to drop down to 40 seconds with the fan running, that just sux bro. How exactly do you have this Holley Blue wired? Relay???? Yes, you have a relay, RIGHT????

82 GT · 05-30-2006, 09:46 PM

Yep, I have a relay wired BUT I took a short cut and powered my pump relay with the hot wire going to the fan relay instead of running a seperate hot wire from the battery.
I don't know if that makes a difference or not but that's how it's wired now.
Also remember that the fan and pump were only running off of 12v. since the car wasn't running and seeing the full 14.5v.
I also know that while driving, the pump gets quiet the second the fan is turned on. Could the fan be robbing current from the pump because they share the same hot wire?

rwhite65 · 05-31-2006, 01:03 AM

I am no wiring whiz, actually I have caught almost every car I own on fire. With that said, I will give my 2 cents. I ran a certain gauge wire to my electric fan, to make sure it could handle the draw and not get to hot and possibly burn up on me. Now if I read your post right, you wired the fuel pump using the fan’s hot wire? I would think it needs it own lead dedicated to just the pump.

I think you have probably just found your lost MPH.

No short cuts.. run it again....and come back and tell us how she did!
Ryan

Dark_5.0 · 05-31-2006, 01:25 PM

Sounds like that should be your problem.

If you can get your mph back you should be somewhere in the 12's.

05-30-2006, 09:46 PM	#2
82 GT Import Slayer Join Date: May 1999 Posts: 2,241	Re: Go get some, 82GT! Yep, I have a relay wired BUT I took a short cut and powered my pump relay with the hot wire going to the fan relay instead of running a seperate hot wire from the battery. I don't know if that makes a difference or not but that's how it's wired now. Also remember that the fan and pump were only running off of 12v. since the car wasn't running and seeing the full 14.5v. I also know that while driving, the pump gets quiet the second the fan is turned on. Could the fan be robbing current from the pump because they share the same hot wire? __________________ '82 GT 351W (.060)Comp Cams 274* Extreme Energy cam, ported & polished heads w/ 1.94/1.60 valves 10.3:1 flat top pistons,stealth intake, Mallory dizzy,Holley 750dp carb, BBK shorties,Flowmaster exhaust,C-4 with 3700 stall converter, B&M pro shifter,8.8 rear, 4:10's, subframes, electric fan, powermaster alternator, 4 core radiator.

05-31-2006, 01:03 AM	#3
rwhite65 Ride Hard Join Date: Oct 2000 Location: Wyoming IL Posts: 1,094	Re: Go get some, 82GT! I am no wiring whiz, actually I have caught almost every car I own on fire. With that said, I will give my 2 cents. I ran a certain gauge wire to my electric fan, to make sure it could handle the draw and not get to hot and possibly burn up on me. Now if I read your post right, you wired the fuel pump using the fan’s hot wire? I would think it needs it own lead dedicated to just the pump. I think you have probably just found your lost MPH. No short cuts.. run it again....and come back and tell us how she did! Ryan __________________ 65 Fastback 91 roller 306, H/C/I AOD-Bauman, PI Stallion, 4.10's and traction loc 04 Grand Cherokee Freedom Edition 79 Ford F-250 4x4 - Restored

05-31-2006, 01:25 PM	#4
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Re: Go get some, 82GT! Sounds like that should be your problem. If you can get your mph back you should be somewhere in the 12's. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

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