Add power for towing

[M Evan]

Hi to everybody, I like to add some power to my 07 with 5. 9 L for towing. Right now I just have Quadzilla XZT with commander and cold air and afe stock filter replacement. Which help little. My toy hauler gross is 13000# combine weight 21000#. I have lot of add ons on my old 2001, but not sure how to add more power to common rail engine. Will injectors help, and which size for towing 50 HP ? DDP or Flux ? How complicated is to replace them ? Replace restricted muffler ? For this towing weight, do I need replace TC and WB or is a 48 line of trans better ? I don't want to go crazy on modification, because I want still have smoke to be manageable. Thank for any idea.

Milos

 

[DPKetchum]

What gearing is the 07?

 

[M Evan]

My gearing is a 3. 72

 

[DPKetchum]

Would have been a lot better equiped for the weight you posted to have had 4. 10s instead of 3. 73s. Already had a torque monster under the hood,just not the right gearing for towing a combined weight of 21,000

 

[BHolm]

Would have been a lot better equiped for the weight you posted to have had 4. 10s instead of 3. 73s. Already had a torque monster under the hood,just not the right gearing for towing a combined weight of 21,000

Seriously? I have scaled at over 24k a bunch of times and run I-70 through Colorado that way. My stock '06 Mega would pull up to the 10,000ft plus tunnel 5 over the limit the whole way. All this with 3. 73 gears. Torque monster is right, what do you need deep gears for with this much power? The 4. 10s are just a waste of fuel.

 

[BHolm]

Hi to everybody, I like to add some power to my 07 with 5. 9 L for towing. Right now I just have Quadzilla XZT with commander and cold air and afe stock filter replacement. Which help little. My toy hauler gross is 13000# combine weight 21000#. I have lot of add ons on my old 2001, but not sure how to add more power to common rail engine. Will injectors help, and which size for towing 50 HP ? DDP or Flux ? How complicated is to replace them ? Replace restricted muffler ? For this towing weight, do I need replace TC and WB or is a 48 line of trans better ? I don't want to go crazy on modification, because I want still have smoke to be manageable. Thank for any idea.

Milos

I am going to do mild injectors next with my standard Quad box (30/60/100). I would open up the exhaust. Personally I like the simple muffler delete. Some want a whole system, either way there is some egt reduction to be had. When I do it I am going to use F1 injector nozzles and take advantage of the $100 per rebuild at the same time. I forget the HP, I think the Flux 1s are 40hp. That plus the XZT puts you pretty close to the 48re's tolerance for extra power. Coupled with the trailer, a transmission upgrade is a good idea. Fitting a tighter TC alone will pep up the truck.



From what I read, injectors are a great upgrade, more power, less smoke, lower egts.

 

[DPKetchum]

You ever pulled with 4. 10s the same places you just described?

 

[pwr2tow]

If you want more power and less EGT's try a Smarty Jr. It costs alot less than injectors, is alot easier to install, and if your not satisfied you can return it for a refund within 30 days of purchase. If it's not what you are looking for all your out is 30 days and shipping but I'll bet after trying the smarty Jr. you'll be glad you did.

 

[BHolm]

Injectors are pretty easy to install, don't let that stop you. The other thing I like about upgraded injectors is reliability. I find it tempting to just use injectors and no power adder box. Problem with that is, the factory settings are skewed for emissions and you almost need a box to take advantage of the injectors. Increased rail pressures are hard on injectors IMO, pretty much all of the boxes increase it to some extent. With injectors you get more fuel through, and much better spray patterns which helps every aspect of performance, without more pressure. I think it is hard to argue that a good set of injectors will make any of our trucks run much better than the poorly done stockers.



On the other hand, the Smarty Jr is a bunch cheaper and has the ability to control torque management that can keep your trans safe.

 

[BHolm]

You ever pulled with 4. 10s the same places you just described?

Depends on how you look at it I guess. I have done it with a G56 truck which compares very closely to a NV5600 and 4. 10s. I've never driven a 4. 10 auto though. I must say, I still don't think 4. 10s are the answer, in fact, if I could go to something like a 3. 23 in my G56 truck I would do it in a second. I'm just saying that the engine has so much power that deeper gearing is just unnecessary IMO. I will admit that the first 100ft in a heavily loaded 3. 73 auto truck is exasperating and that is the one place where 4. 10s would be nice. I've switched to a manual though and don't have that problem with a 6. 29 first gear.

 

[cerberusiam]

Injectors are pretty easy to install, don't let that stop you. The other thing I like about upgraded injectors is reliability. I find it tempting to just use injectors and no power adder box. Problem with that is, the factory settings are skewed for emissions and you almost need a box to take advantage of the injectors. Increased rail pressures are hard on injectors IMO, pretty much all of the boxes increase it to some extent. With injectors you get more fuel through, and much better spray patterns which helps every aspect of performance, without more pressure. I think it is hard to argue that a good set of injectors will make any of our trucks run much better than the poorly done stockers.

While installing the injectors may be simple, getting things right is a bit more complicated than a DL'er or box. The fuel transfer tubes are critical to make things work right and not have issues and that is where things go wrong more often than not. To tight, too loose, misaligned, etc, and you have problems that may not be obvious right away. They are definitely more complicated than previous versions.



As far as the stockers being poor, how can you say that about an injector that will easily make 500 HP? You sure can't work the truck at that level without other major modifications so why replace something that is adequate? When F1 or anybody else rebuilds the injectors all they change is is the tips. There are just not a whole lot of ways to modify the bodies that will make them better. The spray angles are a function of the combustion chamber and piston so about all that really gets changed is the number and size of holes.



Changing injectors is they are causing problems is a given and an after market set is definitely better but unless one is itching to spend money and/or looking for big power, other pieces are probably a better investment.



A Smarty plus boost fooler on my 05 made it another animal completely. Even at or close to the GCVW there is no power issue. It holds OD and will roll all but the longest steepest grades in the northwest without problems.



If the original poster is having power problems and his upgrades are "helping little" something else is wrong. Even 60 hp should be very noticeable. I would start looking for boost or trans problems first. I would look to optimize whats there before throwing more pieces at it.

 

[M Evan]

If you want more power and less EGT's try a Smarty Jr. It costs alot less than injectors, is alot easier to install, and if your not satisfied you can return it for a refund within 30 days of purchase. If it's not what you are looking for all your out is 30 days and shipping but I'll bet after trying the smarty Jr. you'll be glad you did.

This Smarty Jr look interesting, even let you program the tires, which I need too. Is Smarty jr. downloader and could I still use my Quadzilla set up with it ? Smarty Jr even re-program transmission ? Why life need to be so complicated for us diesel owner ?

m

 

[pwr2tow]

This Smarty Jr look interesting, even let you program the tires, which I need too. Is Smarty jr. downloader and could I still use my Quadzilla set up with it ? Smarty Jr even re-program transmission ? Why life need to be so complicated for us diesel owner ?
m

You can stack the XZT with the smarty Jr. if you send the XZT back and have the timing removed, they call it the XZT stacking program. Timing from both the Smarty Jr. and the XZT can distroy your engine especially while towing.

With your stock auto transmission I wouldn't use both the Smarty Jr. and XZT for towing unless you absolutely without a doubt control your right foot or that transmission will be looking for parts real fast. Towing 13,000 lb toyhauler I wouldn't recommend stacking and I wouldn't use the Smarty Jr. performance tune either.

Try the Smarty Jr. alone without using the XZT first, you'll be pleasantly surprised. Maybe even sell the XZT to help pay for the Jr. If you still want more power then the only hope is to upgrade your driveline because if you don't it will eventually leave you stranded.

If your looking for total performance and towing then get the Smarty Sr. , a stacking module, upgraded injectors, twin turbos, upgraded transmission, etc. etc. :-laf :-laf

 

[M Evan]

More and more I think about the Smarty Jr or do you think Sr will be better for towing ?

M

 

[jcarey]

Smarty Jr won't trash your transmission. Smarty 'Sr' will if you use the higher power levels.