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#2372847 - 09/18/17 03:27 PM Re: 6.4 BGE specs [Re: WO23Coronet]
ric3xrt Offline
super stock

Registered: 01/13/06
Posts: 1135
Loc: Trumbauersville PA
Originally Posted By WO23Coronet
Originally Posted By ric3xrt
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?



Yes

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#2429334 - 01/05/18 01:23 AM Re: 6.4 BGE specs [Re: WO23Coronet]
cudadoug Offline
master

Registered: 08/22/03
Posts: 3056
Loc: Between a rock & a hard place
I have a rookie G3 BGE question...

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

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#2429341 - 01/05/18 02:31 AM Re: 6.4 BGE specs [Re: WO23Coronet]
sp392 Offline
master

Registered: 12/18/05
Posts: 8992
Loc: Etobicoke
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.

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#2429361 - 01/05/18 06:45 AM Re: 6.4 BGE specs [Re: cudadoug]
ric3xrt Offline
super stock

Registered: 01/13/06
Posts: 1135
Loc: Trumbauersville PA
Originally Posted By cudadoug
I have a rookie G3 BGE question...

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


Yes, that's what I have in my 2014 Ram right now is SRT392 Block with the stock 2014 Eagle heads from my Ram.
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Some of us are so open minded they only see their View




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#2430047 - 01/06/18 02:13 PM Re: 6.4 BGE specs [Re: ric3xrt]
cudadoug Offline
master

Registered: 08/22/03
Posts: 3056
Loc: Between a rock & a hard place
Originally Posted By ric3xrt
Originally Posted By cudadoug
I have a rookie G3 BGE question...

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


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?

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#2430357 - 01/07/18 12:35 AM Re: 6.4 BGE specs [Re: WO23Coronet]
ric3xrt Offline
super stock

Registered: 01/13/06
Posts: 1135
Loc: Trumbauersville PA
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
_________________________
Truth has no agenda, but those with an agenda make their own truth.
Some of us are so open minded they only see their View




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#2431020 - 01/08/18 10:23 AM Re: 6.4 BGE specs [Re: WO23Coronet]
cudadoug Offline
master

Registered: 08/22/03
Posts: 3056
Loc: Between a rock & a hard place
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.

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#2434743 - 01/14/18 09:11 PM Re: 6.4 BGE specs [Re: L4staero]
gts95 Offline
mopar

Registered: 06/14/04
Posts: 510
Loc: D/FW
Originally Posted By L4staero
Originally Posted By WO23Coronet
Originally Posted By L4staero
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


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


Will be doing a full tear down


Did this teardown ever occur? Would be very interested to hear what you found. Forged pistons??
_________________________
1970 Super Bee, WM21, 383, auto, FY1, a/c, project! 1971 Chrysler 300 2dr, U-code, console car 1980 Chrysler LeBaron LS Limited coupe 2008 Chrysler Aspen, HEMI 2011 Ram 3500 MegaCab, 6.7

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#2434815 - 01/14/18 11:46 PM Re: 6.4 BGE specs [Re: gts95]
L4staero Offline
member

Registered: 09/10/11
Posts: 86
Loc: Australia
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

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#2434828 - 01/15/18 12:18 AM Re: 6.4 BGE specs [Re: L4staero]
gts95 Offline
mopar

Registered: 06/14/04
Posts: 510
Loc: D/FW
Originally Posted By L4staero
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.
_________________________
1970 Super Bee, WM21, 383, auto, FY1, a/c, project! 1971 Chrysler 300 2dr, U-code, console car 1980 Chrysler LeBaron LS Limited coupe 2008 Chrysler Aspen, HEMI 2011 Ram 3500 MegaCab, 6.7

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#2435319 - 01/15/18 08:52 PM Re: 6.4 BGE specs [Re: WO23Coronet]
L4staero Offline
member

Registered: 09/10/11
Posts: 86
Loc: Australia
A new Eagle short is like $900 if you return a core

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#2435351 - 01/15/18 09:52 PM Re: 6.4 BGE specs [Re: WO23Coronet]
RTSrunner Offline
pro stock

Registered: 11/03/03
Posts: 1359
Loc: Pittsburgh,PA
I wonder if they'll take an early motor as a core?

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#2435399 - 01/15/18 10:48 PM Re: 6.4 BGE specs [Re: ric3xrt]
sixpackgut Offline
Drag Week Mod Champion

Registered: 06/08/03
Posts: 9068
Loc: Charleston
Originally Posted By ric3xrt
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


Most piston mfg will allow 2 changes to a shelf piston for shelf piston price
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#2435435 - 01/16/18 12:04 AM Re: 6.4 BGE specs [Re: L4staero]
gts95 Offline
mopar

Registered: 06/14/04
Posts: 510
Loc: D/FW
Originally Posted By L4staero
A new Eagle short is like $900 if you return a core


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.
_________________________
1970 Super Bee, WM21, 383, auto, FY1, a/c, project! 1971 Chrysler 300 2dr, U-code, console car 1980 Chrysler LeBaron LS Limited coupe 2008 Chrysler Aspen, HEMI 2011 Ram 3500 MegaCab, 6.7

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#2435635 - 01/16/18 11:14 AM Re: 6.4 BGE specs [Re: gts95]
cudadoug Offline
master

Registered: 08/22/03
Posts: 3056
Loc: Between a rock & a hard place
Originally Posted By gts95
Originally Posted By L4staero
A new Eagle short is like $900 if you return a core


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.

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#2435720 - 01/16/18 01:19 PM Re: 6.4 BGE specs [Re: WO23Coronet]
ric3xrt Offline
super stock

Registered: 01/13/06
Posts: 1135
Loc: Trumbauersville PA
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.

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#2435824 - 01/16/18 03:30 PM Re: 6.4 BGE specs [Re: cudadoug]
gts95 Offline
mopar

Registered: 06/14/04
Posts: 510
Loc: D/FW
Originally Posted By cudadoug
Originally Posted By gts95
Originally Posted By L4staero
A new Eagle short is like $900 if you return a core


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 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
_________________________
1970 Super Bee, WM21, 383, auto, FY1, a/c, project! 1971 Chrysler 300 2dr, U-code, console car 1980 Chrysler LeBaron LS Limited coupe 2008 Chrysler Aspen, HEMI 2011 Ram 3500 MegaCab, 6.7

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#2436068 - 01/16/18 09:59 PM Re: 6.4 BGE specs [Re: WO23Coronet]
EagleDuster Offline
member

Registered: 12/26/17
Posts: 24
Loc: Northern Colorado
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.


Edited by EagleDuster (01/16/18 10:21 PM)
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#2436152 - 01/17/18 01:29 AM Re: 6.4 BGE specs [Re: WO23Coronet]
cudadoug Offline
master

Registered: 08/22/03
Posts: 3056
Loc: Between a rock & a hard place
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...

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#2436173 - 01/17/18 05:11 AM Re: 6.4 BGE specs [Re: WO23Coronet]
L4staero Offline
member

Registered: 09/10/11
Posts: 86
Loc: Australia
BGE has same chamber size as Apache
The lower comp in the BGE is from dished pistons

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