Rokktech Crank Sensor Installed...

[TCluff]

i just ordered one also, we will see how it works with additional timing

 

[Elite1]

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?

From what I have read, Cetane does the opposite of octane (in a gas engine).

 

[Matt400]

From what I have read, Cetane does the opposite of octane (in a gas engine).

Thats true and I got caught up in that having crossed over from the gasser world, so what you quoted- I was totally wrong.



Cetane increases the fuels volatility so it lights off more easily, actually sooner than it normally would so it has an effect of advanced ignition timing. So it can't suppress ping if the fuel lights sooner and actually lowers octane.

I think with this mod a lubricicity additive with no cetane may be better.

 

[67guzzler]

Hi Guys! What did I miss? Been offline fighting WILMA for a week. Just got power at 6:15 EST tonight after being off 6 1/2 days. Must admit that watching 120 mph winds carrying stuff down the road from the corner of the front livingroom window is not something I want to do again. I didn't have too much damage. Some shingles, a fence and a big mess. Neighbor behind me got a tree through their bedroom window. Nobody hurt. Neighbor on the right had an oak tree on their minivan. Neighbor two doors down to the left had a tree fall on their new BMW 530i.



The RAM did a great thing for us this week. Hooked up a small (500w constant / 800w peak) power inverter under the hood & kept the truck in the garage. Very pleased. The dual batteries in parallel came in very handy. Started up the truck every 6 to 8 hours and drove her for about 20 minutes. Mainly to the store and errands that I would have already run. She did great. Each time she took about 15 minutes before she'd get back to 14 volts.



Everyone else has noisy generators sucking gasoline on their back porches and they couldn't figure how I was watching satellite TV and had the lights on. Cool stuff.



Anyway -- Back to the topic -- Rokktech sensor working great over a month in. Glad for the mild upgrade.

 

[JasonBrown]

Put the Rokktech sensor in at about 1,200 miles. It just sounded "happier" to quote someone else down this thread. I pulled a substantial load with it for the first time this weekend, about 11k skid steer and trailer. The response and power increase felt in the low end seemed to be even more pronounced under load. It did not seem to downshift as quickly either. A very good mod. That is the only mod done by the way. Now have 2,500 miles on it. Best truck I have ever owned. I will keep it until it falls apart in the driveway.

 

[MR.K]

So no one has tried the rokk with a power pup???

 

[Graphite 6]

Hi Guys, I guess my question is like a couple others, installed mine and see nothing in any form of improvment. So I wonder if it's a bad sensor or I don't know how to follow directions. The "pushing up" procedure after the hex screw is snugged, it only moves up and down about a quarter inch? So push it all the way up and tighten? Thanks for any clarification

 

[OHale]

Hi Guys, I guess my question is like a couple others, installed mine and see nothing in any form of improvment. So I wonder if it's a bad sensor or I don't know how to follow directions. The "pushing up" procedure after the hex screw is snugged, it only moves up and down about a quarter inch? So push it all the way up and tighten? Thanks for any clarification

Yes, all the way up to get the full 2 degrees of advance. It should move more than 1/4 inch.

 

[Graphite 6]

OHale, Thanks, I think I installed it correctly,however,I get no results whatsoever,and consequently can't tell if the sensor is bad or any other problem, which is ultimately what I'm trying to determine. I may be a little slow in responding, I only have this computer at work. Thanks again.

 

[RMachida]

I can't see much change directly attributable to the sensor position either but there are way too many things changing. Winter fuel, snow and ice on the roads (a lot of miles in 4wd), more idling, etc. My mileage has dropped from 18-19 to 15-16 but I hear that is fairly normal for this time of the year...

 

[TexBamBam]

If it was bad... it would not start...

 

[Graphite 6]

[/QUOTE]OKay, I'm with ya there,and on keeping the variables to a minimum. I'll run another tank of fuel through and see how the numbers shake out. Thanks

 

[FJfonda]

More input: Saw 9. 0mpg towing 1st tank and 8. 3mpg the second tank this past weekend. So it looks like the towing increase is around 0. 5 mpg.

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!!

 

[OHale]

OHale, Thanks, I think I installed it correctly,however,I get no results whatsoever,and consequently can't tell if the sensor is bad or any other problem, which is ultimately what I'm trying to determine. I may be a little slow in responding, I only have this computer at work. Thanks again.

I had a bad sensor but it threw crank sensor codes and was very rough starting.



Does you truck sound any different when it starts and when running? Mine sounds more 'dieselly' and makes a snort when it starts after putting on the sensor. If yours has no changes at all maybe something is wrong with the sensor.



If you go to the rokktech website there is an email contact. They wrote back right away when I had the bad sensor. You might shoot them an email and see what they think.



I hope it works for you.

 

[Graphite 6]

OHale, I have checked, no codes, and it basically runs /starts the same, with no apparent MPG changes. I don't have any e-mail since I just moved, otherwise I'll do that when I get a chance. Sorry If that's too much information, but I really do appreciate the info. Thanks again.

 

[Motofreak]

juice/attitude

Anyone running it with Juice/Attitude?

 

[KBertetto]

Here's my results from a small test

I installed the sensor tonight, but before I did I ran a 48 mile round trip on the highway going from my favorite fuel station and back. Cruise set at 60 mph, 19 degrees, winter blend fuel. I used the same pump to fill both times and to the same spot in the fill tube. After my first run I went home and installed the sensor and ran the exact same 48 mile round trip... here's my results.



Before Rokk Sensor:

Overhead Mileage-- 17. 6

Actual Hand Calc-- 15. 78 (48. 3 miles / 3. 06 gals)

EGT-- 550 degrees

After Rokk Sensor:

Overhead Mileage-- 17. 6 (I was surpised there was no change)

Actual Hand Calc-- 17. 18 (48. 3 miles / 2. 81 gals)

EGT-- 500 degrees



The truck started and ran with absolutely no difference that I could tell. Power seemed the same, idle seemed the same... I could not tell any difference at all. I'm very happy with the 1. 4 mpg increase, time will tell if it actually really increased that much. Even though it was only 48 miles, it was the exact same 48 miles under the exact same conditions. I'm keeping the sensor because at this rate it will eventually pay for itself and then some.



Bert

 

[Buddy's Ram]

Anyone running it with Juice/Attitude?

I am, No problems noticed. Lower EGT's can't tell about mileage. Been playing with the juice and A2!

 

[Matt400]

Been playing with the juice and A2!

Where did you mount your A2?

 

[Buddy's Ram]

Where did you mount your A2?

The A2 comes with a suction cup mount that attaches to the windsheild.

I initially installed it near the center of the truck. I now have it mounted right next to the driver's side pillar.