6.4 SRT Longblock build

[Jwithing]

Figured it's about time I start my own thread on this. Currently looking at the 6.4 SRT longblock with max effort cam from MMX. As soon as @WadXpress gets his all sorted out and tuned, I'll feel more comfortable pulling the trigger lol. I'd definitely like to be able to wait for warmer temps. This is my daily driver, but its got engine issues and its a matter of time before it craps out.

I'd like to get the longblock and build it up with new parts as much as reasonably close to a full motor so that I can just pull the old and drop in the new motor easily over a weekend. I have the below parts list. Any suggested modifications to the list appreciated.

Tune
MPVI2+PRO & 6 credits - $950 - HP Tuners
Engine tune & Trans tune - $600 - FRP
PCM unlock free with 6 credit and tuner purchase from HP tuners, else $250

Transmission
2800-30000 Street Edge Torque Converter from Moe's Performance - $1,000 with $400 refundable core in 30 days
Or
2800-3000 Circle D Torque Converter - $1,500
Transmission fluid - Valvoline Maxlife ATF - 2 gallons $36 amazon
Or
Lifeguard Fluid 8 s671090312 - 8 quarts @$168
Transmission filter - Dorman 265-850f - $53 amazon

Timing Cover & Components
Timing cover - Mopar 53022195AI -$217
Timing cover bolts - Mopar 6102184AA x4 & 6506269AA x 5
Water pump - Gates 43559 - $68 Rockauto
Or
Water pump - Mopar 68346912AA $165
Water pump bolts - Mopar 6506684AA x 1, 6503202 x 5, 6506270AA x 4, 6104709AA x 1, 6104180AA x 1 - $19
71" belt for HO alternator & ATI pulley - Gates K060710 - $19 amazon
Belt tensioner & bolt - Mopar 4861660AA & 6104221AA - $90
Idler pulley & bolt - Mopar 4891720AA & 6508247AA - $36
ATI pulley - ATI15UD-4G - Moe's $419
320 amp alternator Gloss Black - Js alternators -$438
Alternator bracket and bolts- Mopar 53034126AA & 6507071AA x 2- $9
Alternator bolts and nuts - Mopar 6102431AA x 2, 6506337AA x 2, 6506929AA - $14

Cooling
180 thermostat - Gates 34253 - $17 rock auto
Engine coolant - Mopar OAT concentrate 68163848AB - Mopar 3 gallons at $18 each
Radiator hose lower - continental 66844 - $20 rockauto
Radiator hose upper - Gates 23605 - Oreilys $79 oos @ rockauto
Cold Case Aluminum Radiator - Americantrucks.com -$454 - hoses supplied
Radiator peacock - Dorman 61134 - $4 Rockauto - not needed with new radiator

Engine Oil & Components
Break-in oil - Joe Gibbs Driven break-in oil?
0w-40 redline engine oil - $90.65 gotexhaust
Oil filter - RP 20-820 - $13 amazon
Windage tray gasket - 53021568AE Mopar - $42
Oil pickup tube - 4893416AA Mopar - $23
Oil pickup tube bolt - 6102046AA Mopar - $1
Oil pickup tube nut - 6502756 Mopar - $4
Oil pickup tube seal - 53020861 Mopar - $5
Oil pan - 4893207AA Mopar - $143
Oil pan bolts - 6508065AA Mopar - 18 @ $24
Double ended stub bolts - 6509255AA Mopar - 2 @ $8
Oil drain plug - 6506100AA Mopar - $7
Lokar oil indicator tube- ED 5015-24 Summit - $116
?Oil pump - Melling high performance 10452 +10psi - $167 - Not needed
New catchcan lines?

Exhaust
Exhaust manifold gaskets - Remflex 6022 - $38 Summit
ARP exhaust manifold bolts - ARP-140-1101 - $44 Summit
DEI Titanium Header wrap kit Black - DEI 2@50ft, 12 lock ties, lock tool - $155


Misc. Parts
6.4 spark plugs 97408 LZTR6AP11EG - $110 rockauto
New vacuum hose - mopar 55398761AH - $14 rock auto
Valve cover gasket - Ultra power vs50625r - $13 Rockauto

Tools
Timing gear puller
Engine hoist - strong way 46219 - $370 Northern tool
Engine stand - Ironton 47033 - $110 Northern tool

 

[Mister Luck]

New radiator would benefit the list although some may say its not necessary breaking-in and tuning a new engine is not the time to find out.

Continental 49345 included a separate idler pulley as a kit
I’m not sure how many idler pulleys a 6.4 needs.

 

[Jwithing]

New radiator would benefit the list although some may say its not necessary breaking-in and tuning a new engine is not the time to find out.

Continental 49345 included a separate idler pulley as a kit
I’m not sure how many idler pulleys a 6.4 needs.

I'll check out my radiator and see what condition it's in. Transmission cooler as well.

I do have some duplicate parts in the list for now and some things that I'm not 100% sure of. The exact pulleys is one. I need to check the mopar suppliers and revise. Rockauto has a ton of generic choices it seems.

I'll keep updating this list and get it more organized as well. My thoughts are that it could be very useful for folks looking for replacement parts as well. I just dumped it from my notes application on my phone. I compiled it through a scattered thought process sitting on the couch one night.

 

[Jwithing]

Oil dipstick tube is discontinued, so I'll need to dig around on here for different Lokar replacement suggestions

 

[crazykid1994]

I would look into an all aluminum double row radiator at that point. You’ll be building quite a bit of heat. Only read of 2 or 3 guys with this one but haven’t seen complaints. https://wizardcooling.com/2009-18-dodge-ram-1500-aluminum-radiator-gas-motors/

 

[WadXpress]

I did a new oem radiator with my new motor. Just in case anything was in it I didn’t want to put it in the new motor.

 

[Wild one]

Oil dipstick tube is discontinued, so I'll need to dig around on here for different Lokar replacement suggestions

Lokar ED 5015-24,if i remember the part number right.Most guys bolt it to the brake booster bolt.

 

[Wild one]

I'll check out my radiator and see what condition it's in. Transmission cooler as well.

I do have some duplicate parts in the list for now and some things that I'm not 100% sure of. The exact pulleys is one. I need to check the mopar suppliers and revise. Rockauto has a ton of generic choices it seems.

I'll keep updating this list and get it more organized as well. My thoughts are that it could be very useful for folks looking for replacement parts as well. I just dumped it from my notes application on my phone. I compiled it through a scattered thought process sitting on the couch one night.

Transmission cooler is part of the A/C condensor,to replace it,you're buying the whole condensor.

 

[Jwithing]

Lokar ED 5015-24,if i remember the part number right.Most guys bolt it to the brake booster bolt.

Yeah, just got off the phone with Lokar. Tried getting them to build me a custom 35" one for a 6.4 challenger custom turbo setup as you suggested wording in the past. They're not doing any custom orders right now as they're 6 to 10 weeks backlogged with catalog production. I asked if they had anything catalog wise that long that i could maybe swap the ends out. He then stated they would not be able to make anything custom or catalog past 24" anyways. To the brake booster we go.

 

[Jwithing]

I would look into an all aluminum double row radiator at that point. You’ll be building quite a bit of heat. Only read of 2 or 3 guys with this one but haven’t seen complaints. https://wizardcooling.com/2009-18-dodge-ram-1500-aluminum-radiator-gas-motors/

Any idea if that's direct fit or would that require some bracket modding? Nice to finally see something listed for the gasers. Little pricey, may have to wait on that one but appreciate the insight.

Edit: Just read that it's direct fit lol. Curious if the hoses come with for the upgrade to 1.5. I'll email them.

 

[crazykid1994]

Any idea if that's direct fit or would that require some bracket modding? Nice to finally see something listed for the gasers. Little pricey, may have to wait on that one but appreciate the insight.

Edit: Just read that it's direct fit lol. Curious if the hoses come with for the upgrade to 1.5. I'll email them.

I think that is in reference to the core tubes not the inlet outlet necks. But I may be wrong.

 

[Jwithing]

I think that is in reference to the core tubes not the inlet outlet necks. But I may be wrong.

I think you're right. Multitasking with work at the moment so my focus isn't dialed in.

 

[Wild one]

Yeah, just got off the phone with Lokar. Tried getting them to build me a custom 35" one for a 6.4 challenger custom turbo setup as you suggested wording in the past. They're not doing any custom orders right now as they're 6 to 10 weeks backlogged with catalog production. I asked if they had anything catalog wise that long that i could maybe swap the ends out. He then stated they would not be able to make anything custom or catalog past 24" anyways. To the brake booster we go.

Guess all we can say is thank-you covid,aarrgghh,lol.Apparently the 24" version works okay,but might be a bit of a stretch to reach on a lifted truck.

 

[Jwithing]

Quick search I actually found another radiator. When the he'll did they start paying attention and actually make direct replacement performance radiators? There was nothing a few years ago... I go dormant on the forum for a couple of years and there's all sorts of goodies now lol.

That cold case is taller, longer, and twice as wide. Half the price plus comes with tubes, hoses, and Trans cooler fittings. Looks good to me at that price. Especially since the upper radiator hose is in short supply.

Guess all we can say is thank-you covid,aarrgghh,lol.Apparently the 24" version works okay,but might be a bit of a stretch to reach on a lifted truck.

My thoughts exactly. Already have to climb on my tire to clean my windshield at gas stations and I'm 6'1" lol.

 

[indept]

You list a 320A alternator. If that's an upgrade from a lower amperage one you should upgrade the wiring and fuses to accommodate the new one.

 

[crazykid1994]

Quick search I actually found another radiator. When the he'll did they start paying attention and actually make direct replacement performance radiators? There was nothing a few years ago... I go dormant on the forum for a couple of years and there's all sorts of goodies now lol.

That cold case is taller, longer, and twice as wide. Half the price plus comes with tubes, hoses, and Trans cooler fittings. Looks good to me at that price. Especially since the upper radiator hose is in short supply.


My thoughts exactly. Already have to climb on my tire to clean my windshield at gas stations and I'm 6'1" lol.

Damn. Nice find. It’s half the price. I’m wondering which one would be better since the one you posted doesn’t give the full specs for tube size and fluid capacity

 

[Jwithing]

You list a 320A alternator. If that's an upgrade from a lower amperage one you should upgrade the wiring and fuses to accommodate the new one.

Yup, great call out. I already have the big3 upgrade. I've had to dial down the sound system at night, time to upgrade lol.

 

[Jwithing]

Damn. Nice find. It’s half the price. I’m wondering which one would be better since the one you posted doesn’t give the full specs for tube size and fluid capacity

Looked directly at the cold case site. The dimensions are actually the same as the Wizard Cooling unit and cold case tubes are 1". Emails sent to both for fluid capacity. For half the price, I think I'll stick with the 1 inch. Radiator was $40 more expensive on the cold case site. They also offer a fancy billet cap for $25 lol.

 

[crazykid1994]

Looked directly at the cold case site. The dimensions are actually the same as the Wizard Cooling unit and cold case tubes are 1". Emails sent to both for fluid capacity. For half the price, I think I'll stick with the 1 inch. Radiator was $40 more expensive on the cold case site. They also offer a fancy billet cap for $25 lol.

Yea. 1” should be plenty enough. I’ll wait for you to give a review on whichever you purchase before I buy mine. Been holding off on buying one for a while because the one I posted was a little to rich for my wallet for something that I didn’t absolutely need. If the cold case one comes back good at it’s price I think it’ll be more within my price range to purchase.

 

[Jwithing]

Yea. 1” should be plenty enough. I’ll wait for you to give a review on whichever you purchase before I buy mine. Been holding off on buying one for a while because the one I posted was a little to rich for my wallet for something that I didn’t absolutely need. If the cold case one comes back good at it’s price I think it’ll be more within my price range to purchase.

Sounds good. Just pulled the trigger from American trucks. They had the best price, no tax, plus free two day shipping. Could have select 1 day shipping for $18 too. I'll post some pics next week as it'll be here Friday, but I won't.

I got on a live chat with cold case. Asked them the fluid capacity... "probably about 2 gallons" was the response lol