1994 Dakota is getting this G3 in a few weeks

[RAMM]

Frist very sorry for the loss of your friend. Very cool to see somebody elese building a gen3 hemi dakota. If I missed it what are you going to use for a oil pan? I am in the process of installing a 650-700 hp stroked 6.1 hemi into my 91 Dakota sport race truck. My engine came with a rear sump drag pack pan. The sump was long enough I had to cut out some of the front engine frame cross support. Holley makes a very nice transmission crossmember for the hemi engine swap. I used it when I was running the 360 magnum/904 in my 91. Oh I have got to try them yet. But soposedaly a set of long tube headers for a 5.7 hemi jeep will work. I look forward to reading about your dakota build.

Thanks, as for the oil pan, I'm using just a rear sump oil pan and I anticipate the use of my plasma and MIG. I will look into the 5.7 Jeep headers--what year? J.Rob

 

[mopar65]

Thanks, as for the oil pan, I'm using just a rear sump oil pan and I anticipate the use of my plasma and MIG. I will look into the 5.7 Jeep headers--what year? J.Rob

2006-2010 SRT8 jeep. Here is a pick of the right side header. Also are you on Facebook? If so there is a group for gen3 hemi swaped first gen dakotas. Not my oil pan but there are a few selling hemi swap oil pans on there.

 

[mopar65]

if you wanted to go to 5 bolt wheels, the rear axle from a ford exployer works great. I got mine from a 97. The ford 8.8 is a little narrower than the factory dodge axle. The only down side is you will have to move the spring perches in and weld on shock mounts. I cut the shock mounts of the dodge axle and welded them onto the ford.

 

[mopar65]

Sorry I missed wear you said you had a pan. I bought a holley swap pan, that I was going to use. But the engine I bought came with a rear sump drag pack pan. So I decided to use it instead.

 

[9secRR]

Jesse,
have you built a serious gen 3's in the 800-850 hp range? N/A of course. a couple of guys in my racing circle over here are wondering about them.

 

[RAMM]

Jesse,
have you built a serious gen 3's in the 800-850 hp range? N/A of course. a couple of guys in my racing circle over here are wondering about them.

No I can't say that I have. I do have a personal build underway that should make pretty serious power though it won't be complete for at least another calender year.
I posted it on Moparts months ago. I will follow up once I open my laptop. I despise using my phone for posting. J.Rob

 

[RAMM]

Jesse,
have you built a serious gen 3's in the 800-850 hp range? N/A of course. a couple of guys in my racing circle over here are wondering about them.

My upcoming build for my D150 5spd/Shorty:
New 6.2L Hellkitty Block Bore @ 4.125"
New 6.4L Steel Crank Offset Ground/Nitrited 3.800" x 1.850" Rod Journal Dia
Pankl 6.200" Rods/ .708" Pin
Custom Mahle or Diamond Pistons (Turnaround time will dictate whom @ time of order)
11.8-12.0 comp target
New Apache Cyl Heads with a little bowl work only and the just released Melling Spring Kit for G3's (Wow is this spring kit nice and comprehensive)
Summit BigGun 5743 Camshaft 244/251 .625"/.625" 116 LSA ( I want this driveable)
Comp Short Travel HR Lifters
Manton Rocker Shafts/New Stock Rockers although PRW has the new Hemi rockers available (I liked what I saw @ PRI)
Ritter DrapPack Intake modified W/4500>4150 HVH Adapter
Holley 950 Dominator GB Carburetion / Modified (Why a Dominator? 'Cuz I've always wanted one and this should be enough motor to warrant one)

Projected power should be well north of 600HP @ 7300-7500RPM Maybe 700ish if the planets align. Hemis aren't really known for great torque production and I'm just fine with that in this case. Probably make 550lbs. This will be coupled with a Tremec TKX so not interested in the stoplight drag scene. I live on a great, newly paved twisty hwy along the St.Lawrence river and it is populated in the summertime with all kinds of exotics and muscle (Porsches/Merc AMG/BMW's/Vipers/Pro-Touring Muscle/and disproportionate amount of VW Golf R's < which I find weird) J.Rob

 

[RAMM]

The hard to find PRW rocker arm info. J.Rob

 

[9secRR]

My upcoming build for my D150 5spd/Shorty:
New 6.2L Hellkitty Block Bore @ 4.125"
New 6.4L Steel Crank Offset Ground/Nitrited 3.800" x 1.850" Rod Journal Dia
Pankl 6.200" Rods/ .708" Pin
Custom Mahle or Diamond Pistons (Turnaround time will dictate whom @ time of order)
11.8-12.0 comp target
New Apache Cyl Heads with a little bowl work only and the just released Melling Spring Kit for G3's (Wow is this spring kit nice and comprehensive)
Summit BigGun 5743 Camshaft 244/251 .625"/.625" 116 LSA ( I want this driveable)
Comp Short Travel HR Lifters
Manton Rocker Shafts/New Stock Rockers although PRW has the new Hemi rockers available (I liked what I saw @ PRI)
Ritter DrapPack Intake modified W/4500>4150 HVH Adapter
Holley 950 Dominator GB Carburetion / Modified (Why a Dominator? 'Cuz I've always wanted one and this should be enough motor to warrant one)

Projected power should be well north of 600HP @ 7300-7500RPM Maybe 700ish if the planets align. Hemis aren't really known for great torque production and I'm just fine with that in this case. Probably make 550lbs. This will be coupled with a Tremec TKX so not interested in the stoplight drag scene. I live on a great, newly paved twisty hwy along the St.Lawrence river and it is populated in the summertime with all kinds of exotics and muscle (Porsches/Merc AMG/BMW's/Vipers/Pro-Touring Muscle/and disproportionate amount of VW Golf R's < which I find weird) J.Rob

What would be the next step to be in the 800 hp area? Strictly drag race application.
I guess ported heads, more compression, and larger camshaft?

 

[DionR]

Comp Short Travel HR Lifters

Any personal experience with these?

I've been planning to use new OEM lifters since all the aftermarket G3 replacement stuff so far has a less than stellar record. I even have new set of suspect lifter I plan to through away. But I the Comp one's are fairly new and I wondered if they would be a good replacement as (I think) they are still $150 less than the OEM's.

 

[RAMM]

Nope, first time for me. We'll see.....J.Rob

 

[65rbdodge]

Cool build! Ill be checking back on this thread often. I'm also building a hemi dakota, it's a 96 2wd SWB. I rebuilt an 08 5.7 with a comp 268 cam and holley shorty headers. Using a 46re trans and an 8.75 w/391s. A Holley terminator x will be in charge of it all. Doing body work on it now

 

[85glht]

Subscribed

 

[mopar65]

Hey RAMM any new updates on the hemi dakota Build? I finally got some metal bought so I can weld up the frame notch i cut.

 

[RAMM]

Hey RAMM any new updates on the hemi dakota Build? I finally got some metal bought so I can weld up the frame notch i cut.

Yes I have a few updates but none really engine related. J.Rob

 

[RAMM]

Engine Update: Finally found some time to setup the drive belt which required parting the snout off of an old truck balancer and machining it to a width of .430" honing it so it was a slip fit which spaced the car balancer out for perfect belt alignment. Yesterday I had a customer cancel his dyno appointment so we (myself and my friend Joe) decided to get it on the dyno. J.Rob

 

[RAMM]

For the oil pressure check I left the plugs out and simply turned it over until oil pressure came up. 58 psi @ 230 rpm, good enough for me. I will say the direct drive of the crank to oil pump relationship is noticeably less than traditional crank-cam-driveshaft oil pumps. For example if I turn over a hydraulic roller SBC/SBM for oil pressure in the same manner , once the oil pump primes it drags the starter RPM down about 50 rpm but that is not the case with the LS/G3 platform. I would have to say the new style is far more efficient. J.Rob

 

[RAMM]

I always like to check cranking compression just so I know what to expect and this being a 12.5 compression ratio I had already picked up 5 gallons of 100LL. I shouldn't have been surprised when the gauge swung to 250psi but I was. Then again considering the stock SRT camshaft with very little duration @ .050" it should have excellent cranking compression. Is this thing going to be a gutless turd or is it going to make respectable power? J.Rob

 

[RAMM]

We bolted up the only set of headers I had for Eagle heads which were American Racing Headers for a Ram 1500, plugged in the MSD 6013, bolted on Joe's new Edelbrock 4150 750, pumped it a couple times and whadda you know? It lit right off and settled into a 650 RPM idle with 16" of vacuum. It sounded quite mild to be fair even with the open headers. I plugged in my laptop and manipulated timing and found 30 ramped in slowly to 5000 rpm to produce the power curve you see here. It picked up 17HP with the Wilson 4 hole tapered spacer likely due to the enormous intake and runner volume. I beat on it pretty mercilessly as I expect it to hold up or I'm gonna find the weak link right here right now. 14 pulls later, 4 spacer combos, 2 carbs, and about 10 timing adjustments and this 345 ci Hemi is making a whopping 423 HP 382 TQ. LOL . If it didn't run so darn nice with 70 psi at full song and 48 psi hot 600rpm idle I'd likely put a real camshaft in it and some ported pre-Eagle cylinder heads. These stupid Hemi's just don't make the torque of my beloved Wedges. At least the transmission will live . J.Rob

 

[273]

We bolted up the only set of headers I had for Eagle heads which were American Racing Headers for a Ram 1500, plugged in the MSD 6013, bolted on Joe's new Edelbrock 4150 750, pumped it a couple times and whadda you know? It lit right off and settled into a 650 RPM idle with 16" of vacuum. It sounded quite mild to be fair even with the open headers. I plugged in my laptop and manipulated timing and found 30 ramped in slowly to 5000 rpm to produce the power curve you see here. It picked up 17HP with the Wilson 4 hole tapered spacer likely due to the enormous intake and runner volume. I beat on it pretty mercilessly as I expect it to hold up or I'm gonna find the weak link right here right now. 14 pulls later, 4 spacer combos, 2 carbs, and about 10 timing adjustments and this 345 ci Hemi is making a whopping 423 HP 382 TQ. LOL . If it didn't run so darn nice with 70 psi at full song and 48 psi hot 600rpm idle I'd likely put a real camshaft in it and some ported pre-Eagle cylinder heads.

These stupid Hemi's just don't make the torque of my beloved Wedges. At least the transmission will live . J.Rob

I was pretty shocked when I seen the torque numbers, torque is pretty flat but you see 318's do that some even better nevermind a 340 or 360.

View attachment 1716424104

View attachment 1716424113

 

[DionR]

Not sure I would use this motor as an example of a G3 not making the torque of an LA. MDS/VVT cam that isn't being VVT'ed, short runner single plane intake, and a cam that while it might sounds small on the dyno isn't really (based on my limited info). It is only slightly smaller than the 380HP crate motor cam as what I've seen for the 6.4/6M cam is 286/288 adv, 215/221@0.050 while the 380HP crate cam was 288/292, no idea what it was at 0.050, and the 6.4 cam has way more lift.

I've seen 5.7 dyno curves where the 6.4 cam loses zero low end power but gains in the upper range when VVT is used. I've also heard the cam was a dog without the VVT when it was first tried in the 5.7, to the extent of maybe 30hp loss over the 5.7 cam? Makes me wonder if this application would have gained a bunch more with VVT.

Not saying the G3 should be a torque monster, or arguing with the opinions posted. Just saying this seems like a bad one to use as the poster child of low torque output.

That said, if it was me, I would run the snot out of that motor as it sits. Who cares if some unknown keyboard wizard (me) thinks it might have more potential, looks like it has enough to be fun. And it might not be down power, so who cares. I like it.

Now get it in the truck!

 

[RAMM]

Not sure I would use this motor as an example of a G3 not making the torque of an LA. MDS/VVT cam that isn't being VVT'ed, short runner single plane intake, and a cam that while it might sounds small on the dyno isn't really (based on my limited info). It is only slightly smaller than the 380HP crate motor cam as what I've seen for the 6.4/6M cam is 286/288 adv, 215/221@0.050 while the 380HP crate cam was 288/292, no idea what it was at 0.050, and the 6.4 cam has way more lift.

I've seen 5.7 dyno curves where the 6.4 cam loses zero low end power but gains in the upper range when VVT is used. I've also heard the cam was a dog without the VVT when it was first tried in the 5.7, to the extent of maybe 30hp loss over the 5.7 cam? Makes me wonder if this application would have gained a bunch more with VVT.

Not saying the G3 should be a torque monster, or arguing with the opinions posted. Just saying this seems like a bad one to use as the poster child of low torque output.

That said, if it was me, I would run the snot out of that motor as it sits. Who cares if some unknown keyboard wizard (me) thinks it might have more potential, looks like it has enough to be fun. And it might not be down power, so who cares. I like it.

Now get it in the truck!

I agree with you in everything pretty much, I know why this engine performs the way it does and expected as much. Oh I do plan to run it as is , with the fully forged and studded bottom end I probably won't be easy on it. J.Rob

 

[DionR]

Any updates on this? Is the motor in the truck?

 

[RAMM]

Any updates on this? Is the motor in the truck?

Just finished the mounts....Should be final bolted in this weekend. J.Rob