DDIII's and Cruise Control

[tjpatte]

Hey All,



I was wondering how folks cruise works with the III's? Kinda curious since I'm about to put mine in



With my PM3 if I put it on 6 the thing starts to hunt. I mean it seems to over correct for a loss in speed then falls on it's face then adds even more then falls on it's face..... Pretty soon I'm making Martini's (shaken not stirred) in my glovebox At least with the box I can backer her down to 5 and all is good. Has anyone had this problem with the III's only? If so I'm gonna need more mixed because the III's are going in



Thanks.

Tom

 

[Berserker]

tjpatte,



I could be wrong but I believe that the cruise control is pretty much used to the stock flow of fuel. I think that most things that you do to enhance the flow will make the truck more responsive. The problem is that the cruise control isn't aware of the new fuel flow upgrades. I had the same problems when I went up to the step 2 injectors. I had to remove them but not because of the cruise control. I had too much smoke for my liking.



Oh well, at least you're happy with the III's

 

[tjpatte]

Hey Berserker,



Yeah, I believe that your right on the added fueling affecting the response of the cruise.



What I'm wondering is, can I leave my PM3 on 0 (acting as merely a boost controller/confuser) and still use my cruise? If I bump the PM3 off of that I will not have cruise on (playing time )



Just wondering what other people have found.



Tom

 

[DAWG-1]

No Problems

With DD2s and cruise control, I can even drive with the Comp on. DD2s I have a hard time getting anything more than a grey haze. Sam

 

[Snow man]

I have DD#3's,and an Edge comp. With the comp off,the cruise works great,but even on level 1 ,the cruise is oversensitive,and you end up taking it off after about 30 seconds,or turning off the comp box.

 

[work2muchplay2little]

If it weren't for the HX-40 providing some buffering by not having boost instantly available I would have to turn off the FMS in cruise. But since there is some lag to build boost, no problem with DD3's and fueling box set on 50%.

 

[Morphious]

I have been using my cruise for the last 100k miles with DDIII's and TTPM set on the highest setting with none of the problems you guys are having, but then again I have a standard with 3. 54's that might make the difference.



Morph.

 

[MikeR]

As long as I leave my PM3 off on on 0,with my DD 2's the cruise perfectly fine. When I raise the power on the PM3 the cruse is over sensitive.

With these Supermentals the cruise is way over sensitive. I hardly ever use the cruise anyway.



-Mike

 

[tjpatte]

Well, I just got the DDIII's in It took about 2. 5 hours and this is my first time. I think it helped alot getting info from the group about how to do it.



I only took the truck for a short run of about 15 miles and I'm Impressed! Seat of the pants say that with the PM3 on 0 it feels like its on 5 without the taper off at 2700 rpm like before with just the PM3. The throttle seems more responsive everywhere because the injectors don't wait for boost like the PM3. Tomorrow I'll mess with it and let everyone know.



As for the installation, it was pretty straight forward except for injector removal. Mine were IN there. I did the "bolt pry on the rocker thing" and found that the valve springs would compress and I managed to get three of them out like that with only one bloody knuckle. Then I figured when I couldn't get the other ones out that I would put a washer under the head of the bolt and get a 27mm box end under the washer and get more leverage. This worked for the rest except for #4. No matter what I did it didn't want to come out. So I thought about the picture of the injector puller in the manual and decided to use a Craftsman 27mm deepwell socket and drop the short intake horn bolt into and wind it down. Well, it came out easier than you could believe If only I could of thought of this about 5 injectors ago I would have more electrical tape (my bandage). Just thought I would let everyone know how it went.



BTW I'll try the cruise tomorrow (what the thread is about ) and let you know what's up.



Morphious, I have 3:54's also but with 35's an maybe that's why I have my problem (takes more umph to accelerate the 35's).



MikeR, I'm kinda old school (started bombing in 98 with TST since nobody had anything for the 24V, and TST is great to deal with), but what does the Edge do for ya?? Just kinda curious how it works with the PM3 (which I'll never get rid of) and the benefits.



I need to get a HX-40 and exhaust next once I save the money for it.



Hey, anyone want to pitch in for the "Tommy needs a 40 fund?" (no not a Old English 40 ouncer )



Just thought I would try.



Take care all.



Tom

 

[tjpatte]

BTW, I used the stock tubes (and yes mine were suppose to need the replacemant ones) and we will see what happens. So far no problems and I was told by a Reputable source that you don't need them. Not sure where the thing started about the tubes being too soft and that they would deform, but apparently alot of folks have been wonking about it and the Aftermarket is more than willing to sell you some for about.



Tom

 

[Mopar-muscle]

the only time i noticed my cruise being sensitive with the DD3's was if i tried to set cruise below 65 in OD . other than that its fine .



tj what you will find with the 3's is not needing the PM unless you want to play or smoke out some clown is a ricer , other than that a post electornics fueling box is overkill for daily driving , thats my opinion , never mind how it kills fuel economy

 

[tjpatte]

Tested the cruise today and Mopar Muscle was right. No problem



So while running around today I played with the PM settings. Stuck it on 9 once to see what that would be like with the girlfriend in the truck. She looked out the back of the truck and said she couldn't see anything anymore and asked if I broke the truck I told her no its suppose to do that and her comment was "We need to find a Miata with the top down". Gotta love her



One thing I noticed is that I make about 37#'s of boost on 9 and while the EGT's do climb too high, it's better than it was before on the same settings with the stock injectors. I guessing since the DDIII's can flow more fuel that they can get the "charge" of fuel in the combustion chamber faster and at the ultimate time. Before (about a year ago at Glen Thomas) Mark at TST was telling me the problems with just the fueling boxes is that it takes the stock injectors longer to inject the increased fuel charge and is still injecting after TDC making it less efficient.



Tom

 

[MikeR]

Tom,



When going to an HX40 there's a alot of turbo lag. The EZ in my setup is there to give back some of the low end "oopmf" that you loose when going to the big turbo.



mopar-muscle is right about leaving the box off... it is just too much for the daily grind. Injectors and boxes are kinda violent when shifting through town or in traffic. Big injectors have way better driving manners than any box. I leave it off for towing too.



-Mike

 

[Roger rodbolt]

Blue Chip is smooth

tjpatte,



I agree with the prior posts on not needing to engage the fueling box for towing and daily driving. I use a Blue Chip reprogrammed Power Puck and have NO turbo lag with a HX 40/16cm. What I wanted to point out is there is a great deal of difference in fueling box software.



The newer Blue Chip FMS and Blue Box are highly evolved in "smoothing" the torque output. This makes a huge driveability improvement over some of the other brands that may make similar horsepower and also an improvement over earlier Blue Chip software. With DD III's and a Blue Box or FMS on say, 40%, the cruise control is still useable. The exception would be when you use the "Resume" button the cruise will over accelerate and abruptly let off, when it reaches the previously set speed. A little foot pressure on the accelerator will "smooth" the resume feature.

 

[TomGolden]

Well, I don't use cruise control very often, but I have never experienced any problems with my DD 3's and True Torque Power Module.



Tom