Yep, its time to try something new. Keeping my v5, but thinking about trying a drag comp. A buddy at work just put a juice with attitude on his 7.3, and is talking smack. He needs to be put back in his proper place, which is in my smoke.

What I want to know is, what are the chances of burning up my vp44 by tapping the wire. I've got 130K miles on her. How many people has that happened to? With mach 1.6's and a comp, that should wake it up some, I figure.

 

Well...there are two ways of looking at it in my mind...your VP44 WILL terminate and at 130k you're close to what seems about the average lifespan, (120-150k) so you can either baby it and not tap the wire 'til it dies (which could be a little longer than the miles I mentioned) or say the heck with it and have fun as long as the pump lasts. (which could also be a little longer than expected but less likely) Odds are that either way it'll not be too long before you need a new VP44...JMHO

 

You might want to look into that race box by Quad. But the Edge is a great box. TST is a great one too.

 

I reckon you'll know within minutes of running the truck after the wire tap... some pumps die almost immediately after their initial piercing... then again, some die without so much as being touched.

How about some Mach 4's... no wire tap there.

And that J/A on a 7.3L Ford probably doesn't even put that truck over 300rwhp unless he has other power adders... it's only rated a max of 75hp.

 

Tap it! im a firm believer that if your set up with a good lift pump of somekind you'll be fine. If its dyin i dont think that tapping the wire is going to speed it up. Ive seen a lot of guys tap it with the stock lift pump and when it goes it takes out the injection pump. I wouldnt hesitate to tap it

 

Thanks. I do have a good aftermarket lift pump setup, so she's got plenty of fuel. Guess I'll tap the wire and see what happens. Just hate to have to pay that much $$$ for a new VP44.

 

Read the info on Blue Chip's website about VP44's. They say that if it doesn't die first two minutes beating on it with a wire tap, it will not die any faster with the tapped wire.

From Blue Chip's website, "Often people have mistakenly said that increased pressure from add-on performance devices causes the injection pump failures. This statement only indicates their lack of knowledge, because, unlike most pumps, the VP44 pump does not create more fuel delivery by increasing lift pump pressure. The VP44 creates more fuel delivery by holding the fuel bypass solenoid closed longer. Fuel delivery pressure is controlled by the “pop off pressure “ of the injector.


The reason any aftermarket device that hooks up to the solenoid wire is blamed for the failure is that the failure 99 times out of 100 (honest numbers here) the pump fails within 20 minutes of installing and running with power enhancement. The reason this happens is because the fuel solenoid is held closed longer, therefore using more length of the slot in the rotor. The slot in the rotor overlaps a hole in the distributor to allow for different timing and amounts of fuel to be delivered to the injector and when the solenoid holds the bypass solenoid closed longer, then the high “pop off” pressure is still there when the middle of the slot overlaps the hole. The middle of the slot is the weakest area and therefore deflects, interferes with the distributor and seizes. Pump failure with fuel enhancement devices is not CAUSED by the enhancement device, but PRECIPITATED by the device. WE think this is a “glass half full” scenario rather than a “glass half empty” one, because the potential, eventual failure can be determined within controllable parameters, namely on the test run at higher power, close to home or the local dealer. The other side of the coin is, honestly, if your truck is still running 20 minutes after the installation AND BEAT RUN, you have a 90% chance your pump will not fail for a mechanical reason and therefore last until electrical issues start to show. "