Quad Race Box. Yum.

[srichard]

Got the Quad Race box from Kyle at Extreme Diesel Performance.

It took about 20 minutes to install it. I eneded up mounting the switch in a VERY discrete location. If you take the panel that is under the steering column, you will notice that there is a hole on the metal cross bar at the bottom. Just the right size for the switch. No drilling involved. I can adjust it on the go, although it does require some slight contorting! I am willing to pay that price to have a switch that is totally invisible, unless you crawl in the footwell on your back!



I love that box. The 60hp is enough of a kick to daily drive, the 100hp takes off, and the 130hp makes that truck FAST. I did a roll on in 6th gear at 70, and I hit 90 before i knew it, with the truck pulling like a freight train. Nice.

Now, I am waiting to receive my AFE and I am ordering a muffler this week to cool the temps down a bit. A WOT standing start on the 100hp setting got my temps up to 1400 in a hurry.



I am wondering if I should get a fuel pressure gauge to monitor the rail pressure. I am curious as to how often the box will pressurize up to the limit, in each setting. As in, is it "safe" to daily drive on the 60hp setting, or even the 100hp?



Now, I just gotta learn self control. Oo.

 

[JCleary]

DLeno was saying that he thinks Quad gets half of the 60 by timing, the other half from fuel pressure. It's also been stated on this board that an EZ on the low settings will not harm injectors, even over many miles. This leads me to believe that you can run on the 60 setting indefinitely without harming anything.



I mounted my switch in the same location, but I think I did something to it on install, as it doesn't control the box properly. It worked perfectly the first time I installed it on the steering column, but I think I tweeked it somehow adjusting the steering column.



Anyway, here's the cool part:



1. I called Quadzilla Performance, and they're replacing the switch, gratis! Awesome! All I had to do was send it back.



2. When you unplug the switch, it defaults to the 60 setting. Cool! I'd much rather have that instead of defaulting to the off position.



It's a great box, but I think a low pressure fuel gauge might be a good idea. Sometimes on the higher settings I can feel a bit of hesitation at higher rpm. I think my lift pump isn't keeping up.



Time to get a FASS

 

[LightmanE300]

Guys even on 60hp if I try hard enough I can pull the fuel pressure down to 0. On 100 or 140, it's very quick and easy. JCleary, I guarantee that anytime you are getting on it, halfway down the highway on ramp your lift pump is putting out 0psi at the cp3. Granted we have confirmed the fact the rail will work with 0psi, I agree, a fuel system upgrade is truly necessary to enjoy the full benefits of the box.



It sure seems the 600's run hot! Srichard hitting 1400 in a hurry on 100hp isn't that comforting, but maybe that will drop with an intake/exhaust. I know on 100hp WOT I will never see more than 1300 steadily, doing 0-100mph. On 140hp setting the egt's go thru the roof FAST. I think the 140hp setting is pretty worthless, and from what I hear it's not even really useable for guys with enough turbo and fuel to support 140hp. I was all about it at first, but the more I think about it, the race box is a marketing gimmick to get another hundred bux... lol. Can ANYONE run the 140hp setting with any success managing egt's?

 

[JCleary]

I've never seen over 1250-1300 degrees, running up to 100mph.



Maybe it's due to the fact that I have to lift off to shift? Or maybe it's because I have a 305/555?



Anyway, I don't run the 140 setting much due to the hesitation caused by the lift pump. It is fun though. And it blows clouds of smoke at high elevations before the turbo can spool.

 

[srichard]

then here's the next question. Since the '05s have the pusher pump instead of the lift pump, I wonder what happens to the fuel pressure on the low pressure side. I also would like to know at which point the box maxes out the rail pressure and cause the relief valve to open. I guess that means that TWO fuel gauges would be useful, huh? Do they make fuel gauges that will read up to the, what? 24,000psi in the rail?

 

[bpenrod]

I run the box stacked and I'm good on the 60 and 100 settings with the VA at 50%. Without the VA I can run the 140 setting for a full run without breaking 1350* so I think it is totally usable. Even with my factory turbo the temp would spike up and then come back to 1350 or 1400.

 

[JCleary]

then here's the next question. Since the '05s have the pusher pump instead of the lift pump, I wonder what happens to the fuel pressure on the low pressure side. I also would like to know at which point the box maxes out the rail pressure and cause the relief valve to open. I guess that means that TWO fuel gauges would be useful, huh? Do they make fuel gauges that will read up to the, what? 24,000psi in the rail?

SPA makes a gauge that will work. I think you can pm Matt400 for info. I believe he's the one that made it happen. Do a search here and you'll find the thread. I believe it reads rail pressure and oil pressure. Maybe the oil circuit is used to read low-pressure fuel supply?



As far as rail pressure is concerned, a rep at Quadzilla told me that the max commanded pressure on the 100hp module is 26,000 psi, and 27,000 on the 140 box.



That being said, I don't know how the box knows when the rail hits 27k, because the sensor is maxed out at just over 26k. This is why I run primarily the two lower settings.

 

[JStieger]

I run the box stacked and I'm good on the 60 and 100 settings with the VA at 50%. Without the VA I can run the 140 setting for a full run without breaking 1350* so I think it is totally usable. Even with my factory turbo the temp would spike up and then come back to 1350 or 1400.

bpenrod -



Have you dynoed this stack yet? (I remember you posting a while back when you got some free time from work that you would!)



Also, is the quad more of a top end box and you use the VA for the low end?



-Thanks-

 

[srichard]

here's another thought. What i am mostly concerned about is how often the box causes the fragile relief valve to open. Where is that valve exactly? Is it electrically connected? If it is, maybe a simple idiot light could be connected to tell the driver that the valve is opened... Unless it opens and closes too fast?

 

[mrsnow]

here's another thought. What i am mostly concerned about is how often the box causes the fragile relief valve to open. Where is that valve exactly? Is it electrically connected? If it is, maybe a simple idiot light could be connected to tell the driver that the valve is opened... Unless it opens and closes too fast?

Here is a pic of the valve on my truck. you can see the quad connection to the left of it. From the looks of it I would say it's been opening. I sent my box back to get checked out noting this problem.

 

[bpenrod]

I have not had a chance to dyno the stack yet, I wounded my clutch / trans in a drag race a few weeks back so I'm just limping around for now. I ran the Quad box for a week before stacking it and I think it is balanced across the rpm range. I like the VA box because it adds fuel without the rail presssure. I drive it on 50% and 60hp everyday and just turn up the quad when I want some extra. I have also towed my 7 x 14 dump trailer loaded to the top with clay and had no egt issues at that setting. I will have to get it on a dyno once I get the clutch / trans figured out!!!