Titan Fuel Tank.... For a HEMI!

[cdntrucker]

I just realized that with the 50 gallon tank on the Hemi, not only is the evap can different, but there is also a fuel isolation valve between the tank and charcoal can #1. I don’t know if the connector for the FTIV is present on all 2020+ Hemi rams, but the circuit definitely doesn’t exist on a 2019 Ram Hemi PCM (where the FTIV control wire originates). The FTIV connector and wiring will have to be overlayed in if it is not present on the 31/32 gallon tank equipped hemis.View attachment 38070

Thank you for sharing that detailed information. This would appear to be consistent with the fitment for the 50 gallon tanks starting with the 2020 models.

Perhpaps for 2019 models it may still be retrofitted with 2020+ parts that are compatible but it will involve a few more parts.

 

[Jimmy07]

Thank you for sharing that detailed information. This would appear to be consistent with the fitment for the 50 gallon tanks starting with the 2020 models.

Perhpaps for 2019 models it may still be retrofitted with 2020+ parts that are compatible but it will involve a few more parts.

Pre-2020 would require the same parts, but the FTIV circuit is probably not active on the 2019 PCM.
There’s quite a few parts involved in swapping out the evap system for the 50 gallon tank. You would need this whole list of parts, since they’re all different from the 31/32 gallon tank equipped trucks.

Vacuum Canister and Leak Detection Pump.. 2021 ram 3500 - Myrtle Beach SC

2021 ram 3500 Vacuum Canister and Leak Detection Pump. Vapor Canister [50 Gallon Fuel Tank].

www.moparpartsinc.com

 

[SoundGuySteve]

Glad I stumbled into this thread. I bought my 2022 CCLB gasser off the lot in December and have been contemplating the 50-gal upgrade for awhile now. At 7.5 mpg pulling my 8k# camper, range is almost as bad as my Silverado 1500 was. Love the truck. Love the Hemi. Pulls my camper around like a knocked-out cavewoman. But the range just SUCKS.

Anyway, I figured the 50-gal swap would be just that...a swap, maybe with an extra strap. Guess I'll keep an eye on this thread to see how it works out.

 

[cdntrucker]

Gentlemen, pop your hoods. Look for a sticker on the left. If you see 50 gal, you're good to go!!!

See image below for example.

Let the tank runs begin!

 

[SoundGuySteve]

Gentlemen, pop your hoods. Look for a sticker on the left. If you see 50 gal, you're good to go!!!

See image below for example.

Let the tank runs begin!

Great news! But are any additional parts needed? Or just drop the old tank, transfer parts, and remount?

 

[cdntrucker]

Great news! But are any additional parts needed? Or just drop the old tank, transfer parts, and remount?

For sure. You will need to order all parts mentioned in the prior posts in this thread, including a new fuel pump.

It's reasonable to expect 60+ days for everything to come in. This might change as supply chain issues either improve or deteriorate.

Nice setup btw.

 

[TinGoatTravelers]

Gentlemen, pop your hoods. Look for a sticker on the left. If you see 50 gal, you're good to go!!!

See image below for example.

Let the tank runs begin!

What size bed is your truck?

 

[ThatAlbertaGuy]

Gentlemen, pop your hoods. Look for a sticker on the left. If you see 50 gal, you're good to go!!!

See image below for example.

Let the tank runs begin!

Would that mean our evap is good for 50 gallon ? Or that it just has the wiring for the FTIV vakve and can be flashed to accommodate 50 gallon range ?

 

[ThatAlbertaGuy]

Would that mean our evap is good for 50 gallon ? Or that it just has the wiring for the FTIV vakve and can be flashed to accommodate 50 gallon range ?

My 2022 power wagon has the sticker !

 

[Jimmy07]

It’s just a general emissions sticker. It doesn’t mean anything about having the correct parts for the 50 gallon tank. A 31 gallon tank won’t work with a 50 gallon tank evap system, and vice versa.
I do a lot of swaps and retrofitting from different model year Rams, and I try to do as much discovery work as possible before I pull the trigger on something. This one actually has me hesitant, because there are still a few unknowns (to me). It’s definitely not going to be as easy as just ordering the parts and having a dealership slap them on. The existing fuel tank strap mounts are going to be useless, and new mounts will have to be fabricated in. The chassis harness on a crew cab short bed is not going to have the FTIV wiring/connector present because that option doesn’t exist for a CCSB chassis harness. So it will have to be a custom add-on harness. Then there’s the FTIV circuit on the PCM- how does the PCM know not to use that circuit on a 31 gal truck, but to use it on a 50 gal truck. Is there a different tune file between the two options. I don’t see anything in AlfaOBD that tells the powertrain which fuel tank is used, etc.

 

[cdntrucker]

It’s just a general emissions sticker. It doesn’t mean anything about having the correct parts for the 50 gallon tank. A 31 gallon tank won’t work with a 50 gallon tank evap system, and vice versa.
I do a lot of swaps and retrofitting from different model year Rams, and I try to do as much discovery work as possible before I pull the trigger on something. This one actually has me hesitant, because there are still a few unknowns (to me). It’s definitely not going to be as easy as just ordering the parts and having a dealership slap them on. The existing fuel tank strap mounts are going to be useless, and new mounts will have to be fabricated in. The chassis harness on a crew cab short bed is not going to have the FTIV wiring/connector present because that option doesn’t exist for a CCSB chassis harness. So it will have to be a custom add-on harness. Then there’s the FTIV circuit on the PCM- how does the PCM know not to use that circuit on a 31 gal truck, but to use it on a 50 gal truck. Is there a different tune file between the two options. I don’t see anything in AlfaOBD that tells the powertrain which fuel tank is used, etc.

This sticker indicates primarily, that the vehicle may be equipped with 50 gal and the EVAP part number for the respective tank sizes (31-32) and 50 gallon.
I recommend you obtain a quote from your dealer for the labour. That's what I did for upgrading the tank.

This sticker combined with the VIN fitment verification for the parts discussed here is plenty of confirmation that the vehicle may be equipped at least three types of tanks.

In Canada it'll cost $300USD to swap from 31 to 50 gal. This work will be done by the dealer so that the extended warranty is unaffected.
The 50 gal mopar tank itself comes with a 1 year warranty.

 

[cdntrucker]

Would that mean our evap is good for 50 gallon ? Or that it just has the wiring for the FTIV vakve and can be flashed to accommodate 50 gallon range ?

Sorry, can't provide you with much more detailed advice as it hasn't been done yet. We're on the cusp of it though.
To do this one needs to get all the parts on the list. It's a complete swap.

 

[cdntrucker]

What size bed is your truck?

Standard box. These parts work on both LB and SB.

 

[TinGoatTravelers]

Standard box. These parts work on both LB and SB.

Well - let us know how it goes when you have it changed over. My suspicion is - if it were really that simple, there would be one thread describing how it’s done and a bunch of people contacting their dealers already to have it swapped. All I see is a bunch of people wanting it and bummed it isn’t possible. I think this thread in particular was started by someone who is trying to convert a Titan Diesel tank for their Hemi and have been on hold for parts forever. And getting the Mopar tank (assume that’s $1K or more?) installed by the dealer at $300 for labor! That sounds like a deal! Maybe a 2 hour job? But given Jimmy07’s questions above, I can’t see how this would happen - but I’m going to hold judgement until you report back how it all went. Hope it’s as easy as it sounds!! Best of luck!

 

[cdntrucker]

Well - let us know how it goes when you have it changed over. My suspicion is - if it were really that simple, there would be one thread describing how it’s done and a bunch of people contacting their dealers already to have it swapped. All I see is a bunch of people wanting it and bummed it isn’t possible. I think this thread in particular was started by someone who is trying to convert a Titan Diesel tank for their Hemi and have been on hold for parts forever. And getting the Mopar tank (assume that’s $1K or more?) installed by the dealer at $300 for labor! That sounds like a deal! Maybe a 2 hour job? But given Jimmy07’s questions above, I can’t see how this would happen - but I’m going to hold judgement until you report back how it all went. Hope it’s as easy as it sounds!! Best of luck!

It's a big commitment for parts that can't be returned to boot. I haven't found any other pictures or measurements of the 50 gallon tank so that's why they were posted here.

The quoted price for labor is very reasonable I agree. There's another user on here that has ordered all the parts so it's a coin toss to see who will get their tank in first.

The last part I'm expecting should arrive June 20th.

 

[UNifc6pF]

There's another user on here that has ordered all the parts so it's a coin toss to see who will get their tank in first.

Still ... waiting ... on .... parts

 

[Jimmy07]

Then there’s the FTIV circuit on the PCM- how does the PCM know not to use that circuit on a 31 gal truck, but to use it on a 50 gal truck. Is there a different tune file between the two options. I don’t see anything in AlfaOBD that tells the powertrain which fuel tank is used, etc.

I found the answer to what I was wondering, and the PCM needs to be configured for the 50 gal tank in order to make the FTIV circuit go active. AlfaOBD can’t do this, and this probably can’t be done to a pre-2020 PCM.

I’ve identified the FTIV connector, so I can build the overlay harness to add it, since it’s not present on non-CCLB trucks.
Now, to figure out how to fab in the new strap mounts. I figure based on previous pics, the 50 gal tank straps are about 43” apart. I’ve got 23” apart on a CCSB:

Approximate location of the rear 50 gal tank strap mounting stud:

Approximate location of the front strap mounting stud:

Highlighted the mounting points on a CCSB frame for reference:

So, since I basically need a 50 gal tank to figure out exactly where to fab in the strap mounts, I’m gonna move forward with trying to source one from a wreck.

 

[ThatAlbertaGuy]

If you used the back mounting spot from the ccsb tank would the tank then be to long to fit before the evap system ? Save you mounting up 2 new spots .

 

[cdntrucker]

Here are more photos of the tank, specifically the underside.

The first strap from the rear remains in the same position for both sizes.

From the rear, the strap locations for the 50 gal are at 12" and ~53"-54". They are spaced approximately 42" apart.

Comparatively, the 31 gal straps are at 12" and 24", in this case 12" apart (photos included).

There are a few frame assemblies available for this gen of trucks, for example 68534497AB & 68534498AB. Searching for these assemblies reveals they support both 30 or 50 gallon tanks.

On the frame there are two holes near the 52" location of where a strap would be install appears a possible mount point. There is however no factory installed cross member similar to the two highlighted by Jimmy07 above which currently hold the 30 gallon tank.

Looking at the list of parts available below it doesn't seem there is another cross member to install other than the bolt-on part that is used to support the transmission skid plate (mount point photo attached). So how exactly the 2nd strap is mounted isn't clear. Any idea how to locate the frame part number of these vehicles?

Frames for 2022 Ram 2500 | Mopar Estores

store.mopar.com

 

[Jimmy07]

Looking at the list of parts available below it doesn't seem there is another cross member to install other than the bolt-on part that is used to support the transmission skid plate (mount point photo attached). So how exactly the 2nd strap is mounted isn't clear.

Since there is no such option as a 50 gallon tank for a crew cab short bed or a mega cab, the missing cross member doesn’t exist for those frames. You’ll have to custom fabricate the strap mount.