Rokktech Crank Sensor Installed...

[JCleary]

Yes I have had problems with the "drone" from the Banks exhaust. Cured alot of it by completely removing the exhaust tip. The sensor most likely brought some of it back. Didnt try adjusting it, maybe when I have some time I'll reinstall and play with it some. Think I'm going get rid of the Banks exhaust first though. The loss off power towing kind of has me baffled.

I've been thinking about running the sensor too. I also have a Banks exhaust, plus I'm running a Quad Race. The Banks exhaust has gotten a LOT louder over the past 15k miles, and it does have a raspy sound or buzz when the box is turned up. I think you can describe the sound as "crisp" as opposed to the stock "nasal" sound.



If I added a sensor and had that sound all the time, I think I'd take it off.



I cured some of the noise problem by adding a MBRP 31" stainless muffler 10" downstream of the downpipe flange. The exhaust note is now deeper and much more quiet on accelleration. There seems to be more of a drone at 2000-2200rpms now, maybe because it's so much more quiet the rest of the time.



I'll probably order the sensor and give it a shot. I'll pull the tip off to see if that makes any difference, too.

 

[RWood]

I put the muffler they offer on after the areoturbine and there is no more drone and it is quiet at idle.

 

[OHale]

Oh Well....

Received the sensor yesterday, installed this morning:



Much longer than usual crank followed by a blap of brief (and loud) knocking, then a steady, normal loudness idle with a "miss" every few seconds. The following codes thrown:



P0335, P0336, both crank positon sensor related.



I drove the truck mildly until it was warmed up and it ran fine except for some light knocking under light throttle.



I came back, loosened the sensor and retarded it a little bit. Same starting issue, same codes. Took the sensor off and put the factory back on. Check engine light blinked after restart and then went off.



I emailed rokktech but they are a few hours earlier time-zone wise. I may just have a bad sensor.

 

[betterthanstock]

definitely a bad sensor.

 

[OHale]

definitely a bad sensor.

Good news, actually. I'm sure out of the many sensors they mod they get a few bad from the factory.



This is why I don't gamble. The luck is not with me.....



Back it goes.

 

[dmurdock]

I just got finished putting on my nerf bars and this sensor. Once you can actually get your hands on the dang thing it's easy to get off (I recommend disconnecting the wiring after you get the sensor off). I threw the stocker and tools needed to replace it in the glovebox. So far all i did was turn it on, back the truck in the driveway, and turn it off. More info later... need a nap (dam 100 degree weather).

 

[OHale]

Customer Service

Just a follow up:



Received a fast reply from Paul at Rokktech. He is sending out a replacement Monday and I will send him the sensor I have.



Customer support like that is a precious thing to me here in the 21st century.....



Thanks Paul!!!

 

[BIG BOB]

OHale,



Glad you are giving it another chance. No matter how careful Quality Control is, there are always some failures.



I install mine today with the Hot Juice on my 555 engine. No ping that I can hear. It's raining cats & dogs here could not really give it a good test. However I going to Seattle area on Monday. I will put about 700 mile on Monday so I should have a good mileage report later.

 

[67guzzler]

Just a follow up:



Received a fast reply from Paul at Rokktech. He is sending out a replacement Monday and I will send him the sensor I have.



Customer support like that is a precious thing to me here in the 21st century.....



Thanks Paul!!!

I got the feeling from the beginning that Paul is a "stand up guy. "



He doesn't claim his offerings are the greatest. Doesn't make crazy claims. Charges a fair price for his time, etc.....



I have no complaints.



I wish that someone would just make some software that I load into my laptop or palm and then simply advance the timing right in the onboard computer via the OBD II port. Do this stuff electronically and leave the components as they are.



I'm not sure that it's possible -- just something that would be fun. Let me isolate the timing, number of pulses, pulse width, etc... myself.

 

[dmurdock]

Ok, i drove it around some... obviously not enough to judge mileage but the easiest way to describe it is that the engine sounds and runs "happier". I can tell there is definately more bottom end and I don't seem to use as much pedal to get the same speed (which is definately a good sign).

 

[RDoupe]

Ok, i drove it around some... obviously not enough to judge mileage but the easiest way to describe it is that the engine sounds and runs "happier". I can tell there is definately more bottom end and I don't seem to use as much pedal to get the same speed (which is definately a good sign).

I installed mine, 05 3500 48RE a week ago, it has more low end snap, turbo kicks in a little sooner, the overhead shows about 2 MPG increase, I also installed the Edge EZ at the same time, I will do the numbers by hand and see what is happening, so far the truck appears to be happy.

 

[Matt400]

I wish that someone would just make some software that I load into my laptop or palm and then simply advance the timing right in the onboard computer via the OBD II port. Do this stuff electronically and leave the components as they are.



I'm not sure that it's possible -- just something that would be fun. Let me isolate the timing, number of pulses, pulse width, etc... myself.

That would be slick for sure, about the closest thing is a downloader with various power levels but I doubt you could get the manufacture to divulge what specifically is changed at each level.

 

[CRUSH'EM]

Just ordered Mine

Just ordered mine yesterday nite off their site. Looking forward to slappin it in, as my mileage sux right now, best I've seen is 15. 5 empty. Haven't spent the scratch yet on any 'outside' influences such as Edge Juice w/Attitude, but it's coming... ... ... ... ... Any questions, I'll let y'all know how it works out for me. Oo.

 

[HParfitt]

Hi,

Installed the Rokktech Crank Sensor on Sunday. Delivery was excellent got it in 3 days. I ran the same stretch in expressway before and after the sensor install. I ran both times at 1800rpm. Resetting the overhead at the same spot and taking a reading at the same termination point. With the original sensor I recorded 18. 4. With the Rokktech sensor I recorded 19. 5. My motor is stock except for the sensor. I have been using Power Service with each tank. The instructions indicate that the cetane improvement might not be advisable. Anybody using PS? I didn't notice any additional ping with the new sensor installed. But I'm pretty green. This is my first diesel. I would say for $70 bucks with todays fuel prices it was a good deal. It takes 2 minutes to install. Anybody using this sensor with a zillaraider box? I'm thinking of getting a box not to boost power so much as to eliminate that 'falling on it's face' feeling which seems to be the defueling when empty.

 

[Matt400]

The instructions indicate that the cetane improvement might not be advisable.

I don't understand that. .

Higher Cetane reduces the chance of ping, advancing the injection timing increases the chance for ping. Any idea why they would make that statement?

 

[betterthanstock]

Cetane is the reverse of octane. It actually makes it ignite faster, but then, unlike a gasser, it cannot ignite until after it is injected. Cetane determines the delay between when the first drop hits the hot compressed air, until when the flame appears.

Cetane varies across the country, so try with and without booster. If it feels more powerful after adding, your fuel has low cetane, so booster will help. If it makes no difference, you may be wasting your money. I think California has the strictest cetane requirements, so they probably don't need to use the booster.

 

[steved]

I was thinking that exact thing too...



I purchased one too... hopefully here today.



steved

 

[67guzzler]

I don't understand that. .

Higher Cetane reduces the chance of ping, advancing the injection timing increases the chance for ping. Any idea why they would make that statement?

I agree with betterthanstock:



Cetane boosters often come with anti-gel agents. Why? Enhance cold weather starting. Higher Cetane, though good for cold weather starting due to the fact that it ignites sooner, isn't always good.



When you're advancing the timing it in fact can work against you and cause the ping. When you're advancing the timing with the sensor AND running the cetane booster the net effect a more advanced ignition point in the compression cycle than with just the timing sensor.

 

[FJfonda]

Towing Update

As promised in an earlier post, here is my update after towing the boat for a few tankfulls. I normally run Stanadyne PF and ran it on the 1st tank but not the second. The trailer/boat combo is 12,000 lbs and the route I towed on is one I have used often in the past.

- At light throttle the response is better and it "feels" like it is easier to gently get the rig moving.

- Full throttle response feels about the same both at low speeds and at interstate (65-70mph) speeds.

- Exhaust temp on the long climbs were slightly less (under 50 deg difference) and still stayed over 1300 deg (pre turbo) on long 2800 rpm 28 lb boost climbs.

- MPG's were within the norm for the trip coming in at 0. 5 mpg over average. I'd have to make the trip a few more times to verify the results. I normally see 8 mpg on this trip and saw 8. 8 mpg the 1st tank and 8. 3 the second.



Overall not the change I was hoping for but still well worth the $$ in the way the truck drives when not towing. BTW - fishing was excellent!!

 

[KBennett]

This product sounds like a good thing but I am wondering if it gives the same results for everybody. I have always gotten decent mileage out of my truck and since putting the Leer on it has improved even more. Recently my overhead showed 22. 8 MPG on a 40 mile drive averaging 65 MPH and trying to keep the boost under 5 psi. I know not to trust it but that's the highest I have ever seen.



I am wondering if the way my sensor was placed or how the tone ring was installed at the factory has helped my mileage and this is one of the reasons people are seeing different results?



Anyway it looks like a good idea.