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Re: 400 BB Mopar dyno test part 2
[Re: BradH]
#1197342
03/15/12 12:28 PM
03/15/12 12:28 PM
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Joined: Jan 2003
Posts: 5,484
SoCal
Brian Hafliger
OP
master
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OP
master
Joined: Jan 2003
Posts: 5,484
SoCal
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Thanks guys!
They are 72cc, but after valve job/chamber cut they ended up at 74.5cc.
I milled them down to 70cc to make 10.6:1.
Yes I was a bit disappointed in the power...we were planning on having 550'ish HP and after talking with Edelbrock they are not changing the head anymore so this is how they'll be. They told us the head is now geared more for the PORTER or ENGINE BUILDER...kinda sucks because the old port was really a bolt it on and make some power deal and now, just like every other Mopar head out there it needs TLC.
But....after some port work I'd say it's going to flat out work. I'd bet with porting we'd see that missing 40+HP.
No other changes seem to be in place from what I could tell.
Still for 2500.00 more than the mild 427HP version it made decent power. Would have been nice to hit 550's but porting put it over budget.
Brian Hafliger
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Re: 400 BB Mopar dyno test part 2
[Re: Brian Hafliger]
#1197344
03/15/12 01:44 PM
03/15/12 01:44 PM
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Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
64Post
master
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master
Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
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Quote:
Thanks guys!
They are 72cc, but after valve job/chamber cut they ended up at 74.5cc.
I milled them down to 70cc to make 10.6:1.
Yes I was a bit disappointed in the power...we were planning on having 550'ish HP and after talking with Edelbrock they are not changing the head anymore so this is how they'll be. They told us the head is now geared more for the PORTER or ENGINE BUILDER...kinda sucks because the old port was really a bolt it on and make some power deal and now, just like every other Mopar head out there it needs TLC.
But....after some port work I'd say it's going to flat out work. I'd bet with porting we'd see that missing 40+HP.
No other changes seem to be in place from what I could tell.
Still for 2500.00 more than the mild 427HP version it made decent power. Would have been nice to hit 550's but porting put it over budget.
Have you ported a set of the old victors? If so, what number did you get out of them?
Good thing this wasn't a 4.15 stroke build up, otherwise I would have to sell a kidney to buy the engine from you when you were done...  
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Re: 400 BB Mopar dyno test part 2
[Re: hudsonhornet7x]
#1197349
03/16/12 01:33 PM
03/16/12 01:33 PM
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
How do I tell if the heads are the newer style or the original?
If the chambers don't look like the pics that Brian posted above, they're the original style. It'll be pretty obvious if they're the older version.
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Re: 400 BB Mopar dyno test part 2
[Re: BradH]
#1197350
03/16/12 02:02 PM
03/16/12 02:02 PM
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Joined: Jan 2012
Posts: 1,541
USA
hudsonhornet7x
pro stock
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pro stock
Joined: Jan 2012
Posts: 1,541
USA
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Quote:
Quote:
How do I tell if the heads are the newer style or the original?
If the chambers don't look like the pics that Brian posted above, they're the original style. It'll be pretty obvious if they're the older version.
Thanks. By my pictures it looks like I have the older style. Is the older style preferrable to the new?
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Re: 400 BB Mopar dyno test part 2
[Re: hudsonhornet7x]
#1197351
03/16/12 02:23 PM
03/16/12 02:23 PM
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Joined: Jan 2003
Posts: 5,484
SoCal
Brian Hafliger
OP
master
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OP
master
Joined: Jan 2003
Posts: 5,484
SoCal
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OOTB the newer head will be down on flow and power, but has a better chamber.
I would not run the new head without a good valve job and chamber cut. That's what we did and it makes the head MUCH better.
Bowl porting is usually around 200-400 dollars depending on who does it, but I know after porting these heads will be well over 300cfm at .500 lift. Ours went 286cfm at .500 AFTER valve job and chamber cut.
But.......remember the chamber of the newer head is better (after chamber cut and some porting)and would really lend itself to a pump gas engine needing a large quench area.
From what I see, if you compared the older head to the newer head FULLY PORTED the newer head will make more power. But OOTB...no way!
Brian Hafliger
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Re: 400 BB Mopar dyno test part 2
[Re: Brian Hafliger]
#1197355
03/17/12 04:05 AM
03/17/12 04:05 AM
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Joined: Jan 2003
Posts: 3,616
Riverside, Ca
G_bob
master
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master
Joined: Jan 2003
Posts: 3,616
Riverside, Ca
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Interesting Brian, that this motor made about the same peak numbers as Mrs Gbob's 426 with the 950 on it. Completely different combos, but similar peak outputs (although at different rpm levels). 426 results
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I am also curious on the cc's out of the box. I hope my Victors are done soon! 
A Stealth head dyno test would be great.
