Previous Thread
Next Thread
Print Thread
Page 1 of 4 1 2 3 4
632 crate engine #3104905
12/23/22 01:19 PM
12/23/22 01:19 PM
Joined: Jan 2003
Posts: 31,274
Oregon
A
AndyF Offline OP
I Win
AndyF  Offline OP
I Win
A

Joined: Jan 2003
Posts: 31,274
Oregon
Customer engine. Going on the dyno and then into a '57 Chevy. Should be interesting. Rated at 1000 hp on pump gas.
https://www.chevrolet.com/performance-parts/crate-engines/big-block/zz-632

632.JPG
Last edited by AndyF; 12/23/22 07:38 PM.
Re: 632 crate engine [Re: AndyF] #3104908
12/23/22 01:24 PM
12/23/22 01:24 PM
Joined: May 2004
Posts: 12,495
Taxes & Virus's R-US, NY
Dragula Offline
I Live Here
Dragula  Offline
I Live Here

Joined: May 2004
Posts: 12,495
Taxes & Virus's R-US, NY
One of the best deals on the planet for the money.....

Can't wait to face a whole field full of them this summer with my stock block 440Source stroker...

Last edited by Dragula; 12/23/22 01:24 PM.

'70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk
Re: 632 crate engine [Re: AndyF] #3104909
12/23/22 01:27 PM
12/23/22 01:27 PM
Joined: Jan 2003
Posts: 14,545
So. Burlington, Vt.
F
fast68plymouth Offline
I Live Here
fast68plymouth  Offline
I Live Here
F

Joined: Jan 2003
Posts: 14,545
So. Burlington, Vt.
Quote
Should be interesting.


For sure.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: 632 crate engine [Re: fast68plymouth] #3104911
12/23/22 01:42 PM
12/23/22 01:42 PM
Joined: Jan 2003
Posts: 31,274
Oregon
A
AndyF Offline OP
I Win
AndyF  Offline OP
I Win
A

Joined: Jan 2003
Posts: 31,274
Oregon
The guy has a Hogan intake that he wants to try. Evidently Hogan is already making parts for this engine. The intake looks conventional but it really isn't since the heads are unique and the coils are mounted under the runners. We haven't taken a close look at the engine yet but the heads are obviously a different design than regular big blocks. First glance is that they are similar to a Ford 429/460 but I'm sure the GM engineers would disagree. They would probably say it is a GM Pro Stock design. I'll post pictures when I get them. I haven't' seen under the valve covers yet.

Last edited by AndyF; 12/23/22 01:52 PM.
Re: 632 crate engine [Re: AndyF] #3104944
12/23/22 03:16 PM
12/23/22 03:16 PM
Joined: Jan 2003
Posts: 7,545
Minnesota
Hemi_Joel Offline
master
Hemi_Joel  Offline
master

Joined: Jan 2003
Posts: 7,545
Minnesota
What is the bore and stroke on that thing?


[img]http://i.imgur.com/boeexFms.jpg[/img]
31 Plymouth Coupe, 392 Hemi, T56 magnum
RS23J71
RS27J77
RP23J71
RO23J71
WM21J8A
I don't regret the things I've done. I only regret the things I didn't do.
"Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
Re: 632 crate engine [Re: Hemi_Joel] #3104951
12/23/22 03:45 PM
12/23/22 03:45 PM
Joined: Jan 2003
Posts: 31,274
Oregon
A
AndyF Offline OP
I Win
AndyF  Offline OP
I Win
A

Joined: Jan 2003
Posts: 31,274
Oregon
Bore is 4.60 and stroke is 4.75. It is a tall block which is still shorter than a 440 block so it isn't all that tall. The heads are the real secret, they are symmetrical port heads. A new design from GM. I think this engine is the first application of these heads.
https://www.chevrolet.com/performance-parts/components/engine/big-block/rs-x-cylinder-heads

Re: 632 crate engine [Re: AndyF] #3104958
12/23/22 04:07 PM
12/23/22 04:07 PM
Joined: Jan 2003
Posts: 7,545
Minnesota
Hemi_Joel Offline
master
Hemi_Joel  Offline
master

Joined: Jan 2003
Posts: 7,545
Minnesota
Intake flow: 481 cfm @ 0.787"
Exhaust flow: 347 cfm @ 0.787"

A good set of Hemi heads would have no problem trumping those numbers. What advantage this Chevy has is the big bore.


[img]http://i.imgur.com/boeexFms.jpg[/img]
31 Plymouth Coupe, 392 Hemi, T56 magnum
RS23J71
RS27J77
RP23J71
RO23J71
WM21J8A
I don't regret the things I've done. I only regret the things I didn't do.
"Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
Re: 632 crate engine [Re: Hemi_Joel] #3104964
12/23/22 04:32 PM
12/23/22 04:32 PM
Joined: Jan 2003
Posts: 31,274
Oregon
A
AndyF Offline OP
I Win
AndyF  Offline OP
I Win
A

Joined: Jan 2003
Posts: 31,274
Oregon
Hemi heads flow a bunch of air but the rest of the parts haven't been updated in a long time so it would be very difficult to build a Mopar version of this crate engine. Especially for the same price.

Re: 632 crate engine [Re: AndyF] #3104978
12/23/22 05:23 PM
12/23/22 05:23 PM
Joined: May 2004
Posts: 12,495
Taxes & Virus's R-US, NY
Dragula Offline
I Live Here
Dragula  Offline
I Live Here

Joined: May 2004
Posts: 12,495
Taxes & Virus's R-US, NY
Last one I saw dyno'd hit the numbers right on the money.....Give me that and a glide, and I would put them in my Duster...


'70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk
Re: 632 crate engine [Re: Dragula] #3104981
12/23/22 05:27 PM
12/23/22 05:27 PM
Joined: Aug 2005
Posts: 778
Southington Ct.
T
turbobitt Online content
super stock
turbobitt  Online Content
super stock
T

Joined: Aug 2005
Posts: 778
Southington Ct.
Those are some really nice looking heads. The exhaust and intake ports are raised up a bunch and a nice small chamber. I bet the valves are rotated a bunch from factory. .
AG.


1970 Challenger w/572 Hemi street car and my pride and joy. 1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno. 1976 Cee Bee Avenger Jet Boat - 460 Ford powered.
Re: 632 crate engine [Re: turbobitt] #3104988
12/23/22 05:47 PM
12/23/22 05:47 PM
Joined: Jan 2003
Posts: 31,274
Oregon
A
AndyF Offline OP
I Win
AndyF  Offline OP
I Win
A

Joined: Jan 2003
Posts: 31,274
Oregon
The heads are super tall. They use a separate water crossover and valley plate which is nice. The intake itself is dry and is o-ringed so it should be super easy to R&R.
https://www.enginelabs.com/features...zz632-big-block-cylinder-heads-are-huge/

Re: 632 crate engine [Re: AndyF] #3105004
12/23/22 06:13 PM
12/23/22 06:13 PM
Joined: Oct 2007
Posts: 4,219
New York
polyspheric Offline
master
polyspheric  Offline
master

Joined: Oct 2007
Posts: 4,219
New York
Head CFM is nice, but the head does many other things.
Some smart person said (paraphrased) the absolute limit to intake port efficiency is "how tall is the head casting?"

The hemi chamber was a production item as far back as the 1920s (and racing before that), when the belief was that (nearly) pure geometric shapes were inherently efficient: 50% hemisphere with diameter equal to bore diameter, identical intake and exhaust cams, and symmetrically opposed intake and exhaust valves @ 45° angles. Obviously the 392 is closer to this than the 426, despite being only 13 (?) years older.
The hemi chamber shape has limited toroidal swirl*, minimal quench*, the charge isn't directed to a useful target (spark plug and/or exhaust valve), and no influence on cross-flow during overlap.
* As the bore increases beyond chamber diameter some of these factors decay - but the surface-to-volume ratio (the original concept for the hemi: WW1) slowly disappears.

We now know that much shallower valve angles work very well (as long as the port is tall), a much smaller chamber (= smaller dome) can greatly improve overlap flow (without increasing the OL duration in degrees), and that assignment to value must prioritize the intake valve (and limit the exhaust valve as necessary: HT Jon Kaase).


Boffin Emeritus
Re: 632 crate engine [Re: polyspheric] #3105063
12/23/22 09:15 PM
12/23/22 09:15 PM
Joined: Nov 2003
Posts: 12,522
Western Colorado High Desert
moparmarks Offline
I Live Here
moparmarks  Offline
I Live Here

Joined: Nov 2003
Posts: 12,522
Western Colorado High Desert
And probably comes with a warranty too.


72 Satellite Sebring Plus 440, 72 Dart 5.9 4-spd, 68 Valiant, 73 W200, 78 D100 sb, 78 D200, 98 DAKOTA, .
Moparmarks Parts & Restorations
Desert Mopar Metal
Grand Jct. CO
970-261-7039
http://moparmark.com/
motormangj@gmail.com
Re: 632 crate engine [Re: polyspheric] #3105076
12/23/22 09:48 PM
12/23/22 09:48 PM
Joined: Aug 2005
Posts: 778
Southington Ct.
T
turbobitt Online content
super stock
turbobitt  Online Content
super stock
T

Joined: Aug 2005
Posts: 778
Southington Ct.
Originally Posted by polyspheric
Head CFM is nice, but the head does many other things.
Some smart person said (paraphrased) the absolute limit to intake port efficiency is "how tall is the head casting?"

The hemi chamber was a production item as far back as the 1920s (and racing before that), when the belief was that (nearly) pure geometric shapes were inherently efficient: 50% hemisphere with diameter equal to bore diameter, identical intake and exhaust cams, and symmetrically opposed intake and exhaust valves @ 45° angles. Obviously the 392 is closer to this than the 426, despite being only 13 (?) years older.
The hemi chamber shape has limited toroidal swirl*, minimal quench*, the charge isn't directed to a useful target (spark plug and/or exhaust valve), and no influence on cross-flow during overlap.
* As the bore increases beyond chamber diameter some of these factors decay - but the surface-to-volume ratio (the original concept for the hemi: WW1) slowly disappears.

We now know that much shallower valve angles work very well (as long as the port is tall), a much smaller chamber (= smaller dome) can greatly improve overlap flow (without increasing the OL duration in degrees), and that assignment to value must prioritize the intake valve (and limit the exhaust valve as necessary: HT Jon Kaase).


Kaase knows his stuff. I got a set of his SR-71 460 heads for my boat motor and they have very shallow valve angle, very small combustion chamber, raised intake port, raised roof on the intake and exhaust. Intake flow unported exceeds 400 CFM @ .600 lift and beyond. Price on those is super affordable...
AG

IMG_4046.JPGIMG_4041.JPG

1970 Challenger w/572 Hemi street car and my pride and joy. 1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno. 1976 Cee Bee Avenger Jet Boat - 460 Ford powered.
Re: 632 crate engine [Re: turbobitt] #3105097
12/24/22 12:01 AM
12/24/22 12:01 AM
Joined: Jan 2003
Posts: 31,274
Oregon
A
AndyF Offline OP
I Win
AndyF  Offline OP
I Win
A

Joined: Jan 2003
Posts: 31,274
Oregon
Yeah I've seen some of his stuff. Very smart about how airflow works. He basically resurrected Ford racing by creating some really good heads. He made the 429/460 engines super competitive with his heads on supporting parts.

Re: 632 crate engine [Re: AndyF] #3105112
12/24/22 05:47 AM
12/24/22 05:47 AM
Joined: Mar 2003
Posts: 9,121
Rogue River, OR
Jeremiah Offline
master
Jeremiah  Offline
master

Joined: Mar 2003
Posts: 9,121
Rogue River, OR
The 385 platform is hard to beat with it's inherent design benefits and relatively compact design. Add shaft rockers and you are good to go (I hate dealing with stud girdles etc).



Re: 632 crate engine [Re: Hemi_Joel] #3105985
12/27/22 07:10 PM
12/27/22 07:10 PM
Joined: Jun 2006
Posts: 5,187
CT
GTX MATT Offline
master
GTX MATT  Offline
master

Joined: Jun 2006
Posts: 5,187
CT
Originally Posted by Hemi_Joel
Intake flow: 481 cfm @ 0.787"
Exhaust flow: 347 cfm @ 0.787"

A good set of Hemi heads would have no problem trumping those numbers. What advantage this Chevy has is the big bore.


Wrong forum to point that out in


Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
Re: 632 crate engine [Re: GTX MATT] #3106040
12/27/22 10:23 PM
12/27/22 10:23 PM
Joined: Aug 2003
Posts: 43,946
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,946
Bend,OR USA
Originally Posted by GTX MATT
Originally Posted by Hemi_Joel
Intake flow: 481 cfm @ 0.787"
Exhaust flow: 347 cfm @ 0.787"

A good set of Hemi heads would have no problem trumping those numbers. What advantage this Chevy has is the big bore.


Wrong forum to point that out in
For the Cheby motor? whistling grin wrench
I'm thinking that a good set of Predator heads will match or, hopefully, exceed those numbers luck


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 632 crate engine [Re: Cab_Burge] #3106046
12/27/22 11:04 PM
12/27/22 11:04 PM
Joined: Jan 2003
Posts: 7,545
Minnesota
Hemi_Joel Offline
master
Hemi_Joel  Offline
master

Joined: Jan 2003
Posts: 7,545
Minnesota
OK, I got curious and looked up the Stave V replacement heads that FHO did for me, just to compare with the chevy. Intakes were about the same, the chevy did more on the intake,

Exhaust Port with 1.90" Valve Intake Port with 2.30" Valve
Flowed at 28" without tube. Flowed at 28"
.100" 59 .100" 76
.200" 130 .200" 164
.300" 184 .300" 245
.400" 232 .400" 320
.500" 265 .500" 396
.550" .550"
.600" 285 .600" 451
.650" .650"
.700" 297 .700" 479
.750" .750"
.800" 308 .800" 488
.900" 314 .900" 488


[img]http://i.imgur.com/boeexFms.jpg[/img]
31 Plymouth Coupe, 392 Hemi, T56 magnum
RS23J71
RS27J77
RP23J71
RO23J71
WM21J8A
I don't regret the things I've done. I only regret the things I didn't do.
"Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
Re: 632 crate engine [Re: Cab_Burge] #3106125
12/28/22 01:30 PM
12/28/22 01:30 PM
Joined: Jan 2003
Posts: 19,613
Las Vegas
Al_Alguire Offline
I Live Here
Al_Alguire  Offline
I Live Here

Joined: Jan 2003
Posts: 19,613
Las Vegas
Originally Posted by Cab_Burge
I'm thinking that a good set of Predator heads will match or, hopefully, exceed those numbers luck


They do but making power is not just about cylinder head CFM. And there are BBC heads(heads that bolt to stock architecture) that flat out make a Predators head flow seem paltry. While a Predator can move some air it has its issues as well and not having a larger bore size is just one of those.

It will be interesting when we dyno my Predator and 600-13 engines on the same day here hopefully next month. Certainly wildly different style heads for certain. I am willing to bet power will be similar between the two. The -13 engine is a much larger, but it is essentially and overgrown -1 head or as I like to say SBC on steroids smile But still will be interesting.


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
Page 1 of 4 1 2 3 4






Powered by UBB.threads™ PHP Forum Software 7.7.1