Sorry about not answering your other question...I'm in the 2200' - 2500' elevation.

 

I've been playing around with mod myself but without a dyno to use I have to rely on the seat of the pants method.
I felt like I had good results until I got above 15k and then performance started to decline again just like your numbers indicate.
I then started the EOT mod and things started to improve again.
I started with .5k on the EOT and things felt better with 15.6k on the ICP.
As I increased the EOT resistance I got better results with an increase on the ICP
I'm now using 18K on the ICP and 3.3 on the EOT.
Next step is 4.7k on the EOT.
Sure wish I had a dyno handy!

 

Welcome to , OldStroker.

Having the dyno nearby has helped greatly in this research / testing. I'm heading up to Bonners Ferry (Northern Idaho) on Thursday. I'm keeping the 15.6K in for now because I like the overall feel and performance of the truck.

After I return, I might try to run the MPG tests again. My only "problem" with this time of year in my area is the variance in temperatures and driving conditions. If enough snow falls, my 30 - 45 minute commute can turn into a 3.5 - 4 hour commute...unless I have "sick days" saved up.

I'm a programmer, so if the State would "allow" me to at home, I wouldn't need to commute. Which, I guess, would negate needing to do another MPG test.

Anyway...for now, I'm running the 15.6K because I get good mileage, good performance and I like the way the truck feels.

If you're ever up this way, drop by.

 

Craig, I can't wait for you to get some injectors and a chip..... Your gonna be like "Wow, I wasted alot of time!" LOL Keep up the good work man, everything you've done is very valuable info.

 

Howdy Craig, thanks for the welcome.
I put the 4.7k res on the EOT wire and with 18k on the ICP all seems well. I have read some reports of people being able to get black smoke and a huge improvement in "off the line" performance What I get is overall better performance not any "holy cow" stuff. I'll keep testing and with real numbers like you have supplied I feel good about what I'm doing.

On a side note, I lived in the Moscow ID area for 20 years till '97 and have been all over that fantastic state. What a place to live.

 

Bumped up for those that have questions on this mod or want to see how each of the resistors affected the horsepower and torque on my particular setup.

I just returned from a trip up to Bonners Ferry. I haven't filled the tanks yet, but I'll try to remember to post my MPG for the overall trip.

This trip was made with the 15.6K resistor installed.

 

Filled the tanks yesterday. I swapped out the 15.6K and installed the 14.7K to start another MPG test. Most recent dyno numbers copied to here. We have another Dyno Day scheduled in November. I'll update the HP and TQ numbers if I get a chance to get on the rollers.

If anyone is in the area and would like to drop by, let me know and I'll post the location and info in a new thread.

Stock 144.4 / 305.4 16.5 MPG

5.6K 135.6 / 285.5 MPG Not calculated (I think I grabbed the 4.7K instead of the 5.6K resistor so I'm disregarding this result until I run again with the new exhaust installed)

10K 159.3 / 341.5 MPG Not calculated

14.7K 166.0 / 351.2 MPG (Test in progress)

15.6K 199.8 / 372.3 MPG 18.04 (from Tribal Chevron in Worley to Greenhurst Chevron in Nampa). Round trip average = 16.76 MPG

20.3K 155.0 / 329.1 MPG Not calculated

 

Bumping to the top. Dyno Day is November 9th. You're welcome to join us if you're in the area. Let me know if you need info.

 

So if I'm understanding this correct. You cut the blue/red wire and install a resistor inline. How many watt is the resistor?? .5?

 

I used 1/2 watt resistors don't know what others are using, I think cOOn is using the same wattage also.

 

Thanks. That's what I figured.

 

Yep, 0.5-watt resistors. You could try 1-watt resistors and we could compare numbers, if you're able to get on a dyno.

I thought about making a second set with 1-watt resistors to see if there might be a difference.

Cody, after playing with this mod for awhile, I am thinking about adding injectors and a chip / tuner, but I'm looking at surgery coming up in March 2009 so my "truck fund" will most likely get used for the unpaid time off of work.

I've already spent most of the money from my "rifle fund" to get caught up on stuff for the house. The kitchen sink needed replacing...but that was going to be a future project. When the kitchen faucet handle broke off in my wife's hand, I figured I had to replace the faucet anyway...might as well replace the sink and faucet at the same time.

Oh well...guages will have to wait a little bit longer.

 

I don't see how it would make any difference in 1 or .5 watt resistor. The 1 watt will just be able to pass more current without overheating.

 

I didn't make it to my Dyno Day this month, but here's an update on the MPG test:

Stock 144.4 / 305.4 16.5 MPG

5.6K 135.6 / 285.5 MPG Not calculated (I think I grabbed the 4.7K instead of the 5.6K resistor so I'm disregarding this result until I run again with the new exhaust installed)

10K 159.3 / 341.5 MPG Not calculated

14.7K 166.0 / 351.2 MPG 16.7 MPG <-- Updated

15.6K 199.8 / 372.3 MPG 18.04 (from Tribal Chevron in Worley to Greenhurst Chevron in Nampa). Round trip average = 16.76 MPG

20.3K 155.0 / 329.1 MPG Not calculated

Without being on the rollers, it looks like the 15.6K is still preferred by my truck. I left the 14.7K installed in anticipation of attending the Dyno Day and MPG was already established. Playing on the rollers would not have any affect on the MPG testing. I'll most likely switch to the 10K on the next fill up.

 

I sure have been reading alot of pros about the ICP mod, just out of curosity does anyone have any cons to this mod? All the numbers are showing it is cost effective as far as HP per $ and mileage increases, Looks like I might have to try it.