Swaan
New member
- Joined
- Mar 19, 2012
- Messages
- 734
- Reaction score
- 0
It did well because you were never under the turbo .
35" tires, 42R, towing issues now
- Thread starter mandkole
- Start date
It did well because you were never under the turbo .
^^ the stocker is very responsive with a little fuel. Need to keep the 42 at about 15 psi all the time, then its dial a boost and egts come down, but at 15 psi you are running higher rpm in 3rd or going very fast in top gear now.
I never complained about towing egts before the trans update because never realized it was actually slipping and acted like a loose unlocked converter. Getting the rpm up and on top was easier. Never shifted back/forth between 3rd and 4th.
When I had it hooked up to the AE before, discovered the converter lock tuning does not let the converter PWM function. I understood the stock tuning would modulate varying degrees of lock. With Bill's files, its on or off and comes directly to 100%. This is stuff that I need to discuss with a tuner. (I did not buy the tuning so Bill will require me to buy new files.)
I never complained about towing egts before the trans update because never realized it was actually slipping and acted like a loose unlocked converter. Getting the rpm up and on top was easier. Never shifted back/forth between 3rd and 4th.
When I had it hooked up to the AE before, discovered the converter lock tuning does not let the converter PWM function. I understood the stock tuning would modulate varying degrees of lock. With Bill's files, its on or off and comes directly to 100%. This is stuff that I need to discuss with a tuner. (I did not buy the tuning so Bill will require me to buy new files.)
mikes02ls1
Member
- Joined
- Aug 27, 2014
- Messages
- 128
- Reaction score
- 0
I'm going with 4.56 gears when I get 35.
Yes, weve been over it before. I have 250/200s and it goes from nothing to 38psi in a few seconds. On 35s with a 6" lift. With smaller ibjectors it was horrible for towing in terms of egts.
I wonder if the op could keep energy in the turbine with a 200% nozzle. A 100% nozzle isnt my favorite...for much of anything.
Im not being an azzhole but this is exactly why I have a "small" charger. Empty, stretching its legs i think "i could use another 2-4mm of turbo". Then i yank something and the turbo is fueled pretty hard. Why break it?
Have fun with that....3k rpms at 75...sounds like a ***kin hoot...if you never go over 60...
I'll likely go with a smaller charger before more nozzle. While the truck is fun to race, it needs to tow first.
Going through eastern Oregon this week will give lots of opportunity to get in a workout. More on this later.
Going through eastern Oregon this week will give lots of opportunity to get in a workout. More on this later.
Yea. One or the other.
If you were to just go to a tow setup, id ditch those 100% nozzles but thats a personal preference.
Ill be interested to see what you figure out. I firmly believe if you run a single, and want to use the truck, you err on the small side. I know you know what you are doing but I wouldnt expect your setup to tow worth a poo.
One other things, is your hpo keeping up when you are laying into the pedal? Does icp tank in tip in situations where you command high throttle input?
If you were to just go to a tow setup, id ditch those 100% nozzles but thats a personal preference.
Ill be interested to see what you figure out. I firmly believe if you run a single, and want to use the truck, you err on the small side. I know you know what you are doing but I wouldnt expect your setup to tow worth a poo.
One other things, is your hpo keeping up when you are laying into the pedal? Does icp tank in tip in situations where you command high throttle input?
I think tuning is going to have to be changed so it holds the gears a little longer. 4.10 gears would solve some of your issue but not all of it. Don't be afraid to use higher rpms to stay on top of your charger.
4.56 and 35's is overkill, but f450-550 came with 4.88's which is 2750 at 70.
4.56 and 35's is overkill, but f450-550 came with 4.88's which is 2750 at 70.
Jason
New member
I remember skav having 250/200's, and a gtx4294r, on like a 10" lift and 38's, and he had videos posted...it was extremely responsive...and towed his toy hauler way faster up long california grades than the truck did with other setups, and cooler to boot.
We're all talking the same thing here... my real reason for the thread was to share the observations on the trans refresh and kick around charger discussion thoughts, but also for guys who think they want bigger chargers. Im getting by with it towing, but you have to handle it carefully.
No issues with ICP that I can see, the tow file runs to 3200 @ 45% if needed and goes from 1800-3000 like a light switch.
agreed-- good stuff happens at 25-2700rpm. My OBS had 4.10s with a stock turbo and I ran it there all the time. The 42 just sounds like its in the cab with you LOL
Groomzybanshee
New member
My 42 with a 1.15 housing came up around 1800 rpm. You need to look else where for your issue besides bandaging the issue with a gear change.
Strokersace
Well-known member
I would agree with both of these. It's not a tire/gear ratio issue based on what I've read in this thread.
Got back from the trip to Boise and overall, very happy with how the truck tows. Pulled 18,100 loaded up. On the flat sections, its a no brainer and can run 70-72 all day long @ about 8-900F in top gear. The light hills will push up to 11-1200 to maintain the same speed. Ran with cruise a fair amount.
I84 between Portland and Boise has 2 of the stoutest grades in the west--Cabbage hill and 3 mile hill (outside of Ontario). Cabbage is tricky because the switchbacks require you to slow to 45-50, so just dropped to 3rd and could run at 55-60 without getting above 1200F. Maintaining engine speed is critical, but as long as you're in 3rd, I found I could maintain 60 on any grade. Never had to go above 22-23psi boost.
The refreshed trans and new converter got its warmest when at full load in 3rd gear, but never got above 185F. Once back to OD and down the other side, it dropped back to 165F.
I84 between Portland and Boise has 2 of the stoutest grades in the west--Cabbage hill and 3 mile hill (outside of Ontario). Cabbage is tricky because the switchbacks require you to slow to 45-50, so just dropped to 3rd and could run at 55-60 without getting above 1200F. Maintaining engine speed is critical, but as long as you're in 3rd, I found I could maintain 60 on any grade. Never had to go above 22-23psi boost.
The refreshed trans and new converter got its warmest when at full load in 3rd gear, but never got above 185F. Once back to OD and down the other side, it dropped back to 165F.
I changed my attitude more than anything and got used to towing again-- I hadn't towed in months with the trans dying, then when I did I forgot what it was like..lol. I had this idea that you should be running at 8-900F all the time and could just light it from 1500. It lights a little earlier, but awesome at 20-2100.
The 42 does work good--I think it needs the shorter tire, but its not worth giving up. After talking to others at the track over the weekend, they thought I was flying up the hills. I really had power to spare, but didn't see the need to beat on it.
Ok. I think my junk works pretty good but when I had new trucks to compare, until April i had my 14 dmax (cclb z71 srw 3500) and its amazing how well that 390 hp tows...turn the key push a few buttons,done.
I still think they tow nice but i kinda got spoiled.
Im glad to hear you got it figured out.
I still think they tow nice but i kinda got spoiled.
Im glad to hear you got it figured out.
The new trucks are so much more refined, no question that the development is there. 380-390 in a new truck is badass. I was caravanning with friends in a newer dmax, I was never out of power as long as the road was clear and could maintain speed. But, as soon as we would get slowed on hills and lost the drive, they easily got away.
