Re: 438ci Hemi Dyno. Devil is in the details.
[Re: INTMD8]
#3132310
03/25/23 08:17 PM
03/25/23 08:17 PM
|
Joined: Oct 2006
Posts: 246 Cranberry Twp PA (North of Pit...
rumblefish72
enthusiast
|
enthusiast
Joined: Oct 2006
Posts: 246
Cranberry Twp PA (North of Pit...
|
My Hemi build made max power at 28 degrees total advance. I've been a B/RB Wedge guy for the last 40+ years and used to seeing 34 or 35 degrees. 28* seemed like not enough but the Dyno guy said 28 for my build was consistent with other similar Hemi builds. That hemispherical combustion chamber is pretty efficient. Also, it's 604" and like 11-1 on the CR (all aluminum) but runs on high-octane pump gas. I think the cam bleeds off some pressure and the aluminum soaks out lots of heat. It was one of last builds that came out of Muscle Motors.
Last edited by rumblefish72; 03/27/23 10:32 PM.
1972 Pro-Street 'Cuda, 500" Eagle stoker B Block, Eddy RPM heads, Victor Manifold, 850 Mighty Demon, Hemi 4 Speed, Dana 60 w/4.88 gears - Built by Hansen Racing Middlesex - NJ
|
|
|
Re: 438ci Hemi Dyno. Devil is in the details.
[Re: rumblefish72]
#3132321
03/25/23 09:14 PM
03/25/23 09:14 PM
|
Joined: May 2019
Posts: 722 Lake Villa Il
INTMD8
OP
super stock
|
OP
super stock
Joined: May 2019
Posts: 722
Lake Villa Il
|
^ Appreciate the info, good to know! You're the only other person I recall stating their hemi made the most power at sub 30deg timing.
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
|
|
|
Re: 438ci Hemi Dyno. Devil is in the details.
[Re: INTMD8]
#3132344
03/25/23 10:57 PM
03/25/23 10:57 PM
|
Joined: May 2004
Posts: 12,478 Taxes & Virus's R-US, NY
Dragula
I Live Here
|
I Live Here
Joined: May 2004
Posts: 12,478
Taxes & Virus's R-US, NY
|
^ Appreciate the info, good to know! You're the only other person I recall stating their hemi made the most power at sub 30deg timing.
Good heads and small cubes often will need less total timing.
|
|
|
Re: 438ci Hemi Dyno. Devil is in the details.
[Re: lewtot184]
#3132408
03/26/23 10:33 AM
03/26/23 10:33 AM
|
Joined: Jan 2003
Posts: 8,225 Plymouth, MI
Blusmbl
master
|
master
Joined: Jan 2003
Posts: 8,225
Plymouth, MI
|
I really appreciate your attention to detail. It's top notch in every respect, your Charger is outstanding!
I love the turn signals used as a shift light.
'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
|
|
|
Re: 438ci Hemi Dyno. Devil is in the details.
[Re: Blusmbl]
#3132470
03/26/23 03:47 PM
03/26/23 03:47 PM
|
Joined: May 2019
Posts: 722 Lake Villa Il
INTMD8
OP
super stock
|
OP
super stock
Joined: May 2019
Posts: 722
Lake Villa Il
|
Thanks guys! The throttle bodies are Holley 112-588, 1000cfm. [
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
|
|
|
Re: 438ci Hemi Dyno. Devil is in the details.
[Re: INTMD8]
#3132481
03/26/23 04:28 PM
03/26/23 04:28 PM
|
Joined: Jan 2012
Posts: 1,552 USA
hudsonhornet7x
pro stock
|
pro stock
Joined: Jan 2012
Posts: 1,552
USA
|
Thanks guys! The throttle bodies are Holley 112-588, 1000cfm. [ What a nice build. Do you have pictures posted of the build/restoration?
|
|
|
Re: 438ci Hemi Dyno. Devil is in the details.
[Re: INTMD8]
#3132696
03/27/23 11:40 AM
03/27/23 11:40 AM
|
Joined: Jan 2003
Posts: 75,282 A gulag near you.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,282
A gulag near you.
|
What company makes those W23ish wheels ?
Mainstream Media is the new Pravda
|
|
|
Re: 438ci Hemi Dyno. Devil is in the details.
[Re: INTMD8]
#3132950
03/28/23 10:34 AM
03/28/23 10:34 AM
|
Joined: Jan 2003
Posts: 13,496 Marion, South Carolina [><]
an8sec70cuda
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 13,496
Marion, South Carolina [><]
|
Very nice! Surprised at the timing...mine likes 34°, but it's 575 inches.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 4 speed, Dana 60 '71 Demon 340, no drivetrain, on blocks behind the barn '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
|
|
|
Re: 438ci Hemi Dyno. Devil is in the details.
[Re: an8sec70cuda]
#3133023
03/28/23 02:35 PM
03/28/23 02:35 PM
|
Joined: Jan 2004
Posts: 4,633 Motor City
6PKRTSE
master
|
master
Joined: Jan 2004
Posts: 4,633
Motor City
|
Mine made most power and torque at 33 degrees at 528".
1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.
|
|
|
Re: 438ci Hemi Dyno. Devil is in the details.
[Re: INTMD8]
#3133219
03/29/23 09:59 AM
03/29/23 09:59 AM
|
Joined: Oct 2006
Posts: 246 Cranberry Twp PA (North of Pit...
rumblefish72
enthusiast
|
enthusiast
Joined: Oct 2006
Posts: 246
Cranberry Twp PA (North of Pit...
|
I love the Fratzog detail on the wheels. Since that is part of the new EV branding for Stellantis, instead of people asking if that thing got a Hemi, they'll be asking if it is electric!!
1972 Pro-Street 'Cuda, 500" Eagle stoker B Block, Eddy RPM heads, Victor Manifold, 850 Mighty Demon, Hemi 4 Speed, Dana 60 w/4.88 gears - Built by Hansen Racing Middlesex - NJ
|
|
|
Re: 438ci Hemi Dyno. Devil is in the details.
[Re: rumblefish72]
#3133299
03/29/23 01:36 PM
03/29/23 01:36 PM
|
Joined: May 2019
Posts: 722 Lake Villa Il
INTMD8
OP
super stock
|
OP
super stock
Joined: May 2019
Posts: 722
Lake Villa Il
|
Thank you. I originally thought I would fill in the fratzog on the cap with black paint but not sure. (same with my indecision about a tail stripe)
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
|
|
|
Re: 438ci Hemi Dyno. Devil is in the details.
[Re: INTMD8]
#3133569
03/30/23 09:40 AM
03/30/23 09:40 AM
|
Joined: Oct 2006
Posts: 246 Cranberry Twp PA (North of Pit...
rumblefish72
enthusiast
|
enthusiast
Joined: Oct 2006
Posts: 246
Cranberry Twp PA (North of Pit...
|
Thank you. I originally thought I would fill in the fratzog on the cap with black paint but not sure. (same with my indecision about a tail stripe) I don't know, I think that's really subtle without black paint. The way it looks now, if I walked past it at a car show and saw that detail, I would just chuckle and smile. I'd probably want to meet you and shake your hand . The rest of the car is like a big hammer, the subtlety of the Fratzog detail helps with the balance. Are those Coyote pencil coils? If so, I bought a set of those from MSD and hope to install sooner or later. Besides shortening the boot that goes over the spark plug, did you have to make any other mods to the coil? The MSD coils have that stainless steel coil spring inside the boot for connectivity between the coil and the spark plug tip. That looks a little sketchy to me but it works for the OEM. And, you have to add a stud or some sort of attachment provision to the valve cover. And once you do that, you're locked into a specific direction on the coil wiring. I thought it might be neat to run all the coil trigger wires to the rear of the engine to make the casual observer wonder if it is a Gen I 392. What ECU are you using? Thanks - nice car!
1972 Pro-Street 'Cuda, 500" Eagle stoker B Block, Eddy RPM heads, Victor Manifold, 850 Mighty Demon, Hemi 4 Speed, Dana 60 w/4.88 gears - Built by Hansen Racing Middlesex - NJ
|
|
|
Re: 438ci Hemi Dyno. Devil is in the details.
[Re: rumblefish72]
#3133577
03/30/23 10:18 AM
03/30/23 10:18 AM
|
Joined: May 2019
Posts: 722 Lake Villa Il
INTMD8
OP
super stock
|
OP
super stock
Joined: May 2019
Posts: 722
Lake Villa Il
|
Thank you once again Yes they are Coyote coils. I trimmed .125 off the end of the rubber boot with a razor blade. (inside is a spring as well that had enough range) Shortened the ridge on the plug tubes by .200 on a belt grinder. Used a bolt and .400 thick threaded spacers for mounting. I'm using a Holley HP ecu.
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
|
|
|
|
|