6.4 BGE specs

I know that they use the Hellcat block and heads, but what about the rotating assembly? I'm guessing that they have a forged crank and forged powder metal rods, but are the pistons forged? I've heard that they are but haven't been able to confirm. Also, what are the cam specs? Likely using a 5.7 cam?

Dodge says the pistons are forged however all the Hemi vendors say they are not

The BGE block is the same as Hellcat but painted a different color.

The crank is a forged crank that is the SAME as the srt forged 6.4 crank from the passenger car. This was confirmed by a Hemi vendor.

I would treat the BGE just like a srt rotating assembly- great crank but rods and pistons are not suitable for a serious performance build.

Ah well, I thought maybe the BGE 6.4 would be a decent boost ready junkyard engine if it had forged slugs from the factory

Heads are not hellcat, Hellcat have larger intake mounting area.
6.4 Short block will take some boost just make sure you open up the top ring gap. granted your not going to hunt down any 405 street outlaws with a stock BGE 6.4

I have a BGE on its way to me so i will keep u updated. I think its in the hemi vendors best interest to not let on that the pistons and rods are any good. Their livelyhood is selling pistons and rods always with the scare tactics of no more than 5 psi boost on 6.4s etc. Or you need pistons and rods to make power.....Quite a few cars locally on standard pistons. Low 10s in a 300 with a 6.4.

Heads are cast same as a hellcat... same material andnports just intake bolt pattern differs

Same casting (ports, material, heat treating, reinforcements etc), but different bolt pattern.

Sweet! Are you going to tear into abit or run as is?

Will be doing a full tear down

Originally the crank was a different part number to the srt 6.4 but now i think they are the same. I should have both an srt and a 2014 (1st year) bge pulled down side by side to compare cranks, rods and pistons

Does anyone know the separate part numbers for the BGE block, heads and short block?
Thank you!
Wailin

68280506AA $810 BGE head 6.4 right
68280507AA $865 BGE head 6.4 left
68226133AA Short Block $2,938.00
Block-Engine Cylinder 68166434AD$1,429.45





Outstanding! Thank you very much! Do you have a seller that you recommend?

A seller for new or used engines?

For new stuff i always recommend Andy at Eastcoastmoparts.com

The seller is bought my used BGE from was horrible to deal with however the engine was $1000 less than every other seller.

Thank you! I was thinking new.

When i say BGE are cast same as hellcat i dont mean that they are the same casting just with different intake face drillings they are not.
However they share the same casting strength improvments but the bge has no allowances cast into it for a hc intake pattern

IF you get the chance to cut both heads open, the Hellcat have more material under the Intake valve seat and waters passages around exhaust port are larger.

Over the BGE head?

The BGE has a different part # stamped in the top of the piston but can not come up with anything on the #. I bet it has forged pistons!!!

Yes

I have a rookie G3 BGE question...

Will my eagle heads work with a 6.4 BGE OE shortblock?

From a junk yard stand point, I am pretty sure BGE's will be way harder to find than SRT 392's down the road.

Yes, that's what I have in my 2014 Ram right now is SRT392 Block with the stock 2014 Eagle heads from my Ram.

What is the actual compression of that deal? Were the BGE heads a "small" chamber similar to the Eagles?

BGE heads are small chamber
My actual compression is 9.7 to 1 the pistons I used were a set of probe pistons for 4.09 bore 6.1 with a 4.05 stroke. We had to modify them by milling .018 off the top because I used a 4.08 stroke scat crank and 6.125 Manley H-beam rods

Okay, good...thank you. I was curious if the Eagle head on the BGE resulted in a high CR ala an early 5.7 block.

Did this teardown ever occur? Would be very interested to hear what you found. Forged pistons??

Yes i carried out a full strip down. The pistons are not forged like Mopar said in their press release. They are cast but have an extra 20% material above the top ring and the rods have a tapered small end like a Hellcat

Interesting. Still sounds like a good bang for the buck for a shortblock from Mopar. I have a 2013 5.7 HEMI with a snapped rod, so strongly considering purchasing the BGE shortblock from Mopar, and bolting on my stock Eagle heads. My concern is figuring out my compression ratio with the Eagle heads.

I priced the Apache shortblock and BGE shortblock from my dealer and they are very close in price.....would seem the BGE is the beefier setup.

A new Eagle short is like $900 if you return a core

I wonder if they'll take an early motor as a core?

Most piston mfg will allow 2 changes to a shelf piston for shelf piston price

Yah....but the motor is out now and I live by the old adage theres no substitute for cubic inches.....

Trying to figure out how they get the lower compression in the BGE motor over the Apache. And how will that work out if I bolt on my Eagle heads to a BGE shortblock.

Diff in compression is either pistons and/or chamber cc's. Not alot of specs published out there.

I have been told that the BGE is "9:1" with a relatively small chamber head. How small compared to the Eagle head, I wish I knew.

I don't have those in fornt of me right now, I'll get them tonight,
Eagle are smaller then BGE, I think it's 65CC and 69CC .I'll double check tonight.

I agree that the technical specs on the BGE 6.4 is sparse on the Internet. The Allpar article introducing the engine back in 2014 listed the compression ratio as "10:1". Where did you read 9:1?

https://www.allpar.com/mopar/V8/truck-hemi.html

You could CC the heads if you already have them, kits from Summit are cheap... also could check the 1/2" down fill volume and piston-to-deck distance to see how "tall" they are in that BGE block.

I hadn't seen the allpar data; good stuff. I read 9:1 by an "expert" on Facebook.

My eagle heads are right at 67.2 cc's as cast.

So then the question becomes how much cam can you stuff in a BGE/Eagle combo with the OE piston...

BGE has same chamber size as Apache
The lower comp in the BGE is from dished pistons

I had a new crate 6.4 BGE, for sale and it took a year to sell. everyone wanted a srt 6.4.
now there the cool engine to build it sounds like...

Can someone advise what head gaskets would be used utilizing a BGE shortblock and Eagle heads? Is there a difference in the factory headgaskets between the BGE and Apache engines?

I'm wondering what options I would have to help me determine what approx. compression I would have with the BGE and Eagle heads given they are a small chamber than the Apache heads.

Always heard to use the gasket that goes with the block.
The compression is questionable. Im thinking the BGE comp is going to be low due to being a workhorse. No proof and eagle head BGE combo should net 9.5 to one or less?
You can play a bit with compression with gaskets.
Matt

The BGE is 10.0 and the eagle heads are a few CC smaller so it should be getting close to 10.5 with factory thickness gaskets, 87 octane range for a new hemi.

They are hellcat heads !!!! With 6.4 bolt pattern!!!! 100% sure and it’s forged the only problem with the short block is Mds!

No same gasket use cometic .54

This is a great engine!! And sort of a secret,just get rid of Mds and your basically a hellcat! Short block

Not really basically a Hellcat short block. Runs a HC block with a std 6.4 crank (HC is stronger) powdered metal rods and cast pistons. Basically a 6.4 car short block with slightly lower comp, slightly more material above the top ring and a block with slightly better cooling. Still cast pistons!

No they are not Hellcat heads, they are close, same alloy and flow characteristics, but you can't use them with a Hellcat intake system....been there and it's not pretty.



Truck short block and Eagle heads with stock head gaskets = 11.1:1 compression.
SRT392 Sort block ,stock head gaskets and Eagle Heads = 11.5:1 compression
Truck rods are not the same as Hellcat/Demon, but they are BOTH Forged powder metal rods. beams are slightly different in the HC/D engines.

Same timing chain and tensioners,
They do not use the same Cam...non of them do,
SRT392 has two cams(same lift, 574/541 different lobe patterns)
Hellcat has it's own cam (less Intake lift than 392 561/551 but more Exhaust duration)
Demon has it's own cam(same lift as the Hellcat but even more exhaust Duration)
Truck has it's own cam...I forget the specs and honestly don't care.

Yes it is a great short block

Easy peasy for compression and bigger cubes, but very little camshaft will fit, right? I have been told that there is even less room than a pre-2009 5.7 with eagle heads. Can anyone confirm this?

Comp Cams 274 will fit in the Apache engines if the cam phaser is locked. the 274 is .619/.612

Here's a FB video from 2015 with SRT rep reviewing Apache vs Hellcat head. You can notice the darker 356 material as well as the additional cast gussets on the deck surface for reinforcement and extra strength. I believe the BGE heads use the same casting as it would make sense for a commonality/production of heavy duty castings.

https://www.facebook.com/moparmusclemag/videos/10153679527602792/?fref=nf

I didn’t mean or say the pistons rods etc I’m referring strictly to the block and heads of BGE and they are exact hellcat material,extra cooling passages in the block 100%
The heads are exact with 6.4 bolt pattern that’s a fact t 356 alloy and mold difference is in bolt pattern!! As far as the entire shortblock I don’t know if it’s forged or not I’ve heard both yes and no but idk .I have the block with all forged internals so I’d assume it isn’t forged stock or it’s a secret ,really there is a LOT of info vendors do NOT want out .Imho it’s a great bare block meaning hellcat grade and same for the heads

Btw 5.7 heads have larger combustion chamber (open) as opposed to the 6.4 closed 73cc or so but obviously the 6.4 heads are superior for cfm etc

Earlier heads yes 85cc, but eagle are 65cc.

BGE Heads are Not the same as Hellcat heads,
yes they both are made of 356 alum,
yes they have the same Port shapes.
Yes they share the same Head bolt pattern(As Do all production G3 Hemi's
The difference is in the Intake bolt pattern, the Hellcat/Demon has an extra top row of intake bolts for the supercharger, the BGE head DOES NOT have enough material there to drill and tap for the extra row of head bolts....Been there Done it and it's not does not work.
In pinch you could make the BGE heads work, but it will not last long, we got 2 maybe 4 hours out of one on some dyno test, the head split the casting where we drilled for the extra bolts. I don't recall but I know I've written it in a post some where on here.

BGE and Hellcat have both have a forged crankshaft,(different stroke) both have Forged powder metal rods.

Sounds like they could if saved money with one casting as appose to two.
and then offer them to us at a cheaper rate! LOL

I think they will, from a cost saving point of view it would make sense
What a lot of people loss in the mix is the BGE was out before the Hellcat, and the BGE was meant to be Stiffer version of the Apache

I don't have any BGE heads here to take a photo of, But I'll try and get on posted by Tuesday
Here is a Hellcat head, notice the the Uper Intake bolt holes and how the lower holes are not drilled