Re: Hemi Question....
[Re: mark42202]
#706315
05/24/10 07:32 AM
05/24/10 07:32 AM
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Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
B G Racing
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Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
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Quote:
Looking at buying a Hemi car and I want to know what kind of limits I have as far as power. It has a Mopar Performance block, Mopar Performance aluminum heads, Eagle 4.150 stroker crank, Manley 6.965 rods, JE custom pistons, Comp Cams- 24-000-9 Hemi Roller, Comp Cams 929-16 Springs, Comp Cams 8921-16 Roller Lifters.
What is the max I can expect from these heads? Will the bottom end support 1200hp? Any input greatly appreciated. This is my first foray into the Hemi world and want to make sure I'm jumping in with a decent foundation.
Step back and reflect for a moment,the answer is obivious.   
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Re: Hemi Question....
[Re: B G Racing]
#706316
05/24/10 07:39 AM
05/24/10 07:39 AM
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Joined: Oct 2007
Posts: 299
Sparta, TN
mark42202
OP
enthusiast
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OP
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Posts: 299
Sparta, TN
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Quote:
Quote:
Looking at buying a Hemi car and I want to know what kind of limits I have as far as power. It has a Mopar Performance block, Mopar Performance aluminum heads, Eagle 4.150 stroker crank, Manley 6.965 rods, JE custom pistons, Comp Cams- 24-000-9 Hemi Roller, Comp Cams 929-16 Springs, Comp Cams 8921-16 Roller Lifters.
What is the max I can expect from these heads? Will the bottom end support 1200hp? Any input greatly appreciated. This is my first foray into the Hemi world and want to make sure I'm jumping in with a decent foundation.
Step back and reflect for a moment,the answer is obivious.
Ok, I'm assuming you are meaning it won't then? The engine was built by Wheeler Racing engines in MN for NOS. If it was as simple as "reflecting", I wouldn't have posted. Like I said, I have no experience with Hemi's other than drooling about them, lol. Just wanted some advice from those "in the know". Thanks.
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Re: Hemi Question....
[Re: mark42202]
#706317
05/24/10 07:51 AM
05/24/10 07:51 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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WHATS the compression and bore size?
i cant see max. 850 hp with that combo imo.
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Re: Hemi Question....
[Re: mark42202]
#706319
05/24/10 08:26 AM
05/24/10 08:26 AM
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Joined: Jun 2009
Posts: 705
Michigan
Hemiroid
super stock
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super stock
Joined: Jun 2009
Posts: 705
Michigan
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Quote:
Looking at buying a Hemi car and I want to know what kind of limits I have as far as power. It has a Mopar Performance block, Mopar Performance aluminum heads, Eagle 4.150 stroker crank, Manley 6.965 rods, JE custom pistons, Comp Cams- 24-000-9 Hemi Roller, Comp Cams 929-16 Springs, Comp Cams 8921-16 Roller Lifters.
What is the max I can expect from these heads? Will the bottom end support 1200hp? Any input greatly appreciated. This is my first foray into the Hemi world and want to make sure I'm jumping in with a decent foundation.
The block can handle the hp, but I'd be a little concerned with the crank and possibly the rods @1200 hp. Not that there hasn't been 1000hp+ engines with Eagle cranks, I just don't personally like to run them at that hp level. I've seen lots of 800+ hp engines with the Manley rods, but never in a 1200hp application. I believe Manley rates there race rod to 1000hp, unless that's changed. I'm with Chris that n/a you have around a 850hp +/- assuming the heads are ported correctly and it has enough compression and a decent induction system.
1200hp is a lot of power and demands good stuff to live. I wouldn't have any problem running your engine n/a the way it is, but if you're hanging a 400hp fogger on it, who knows how long it will live. Either way, best of luck and keep us posted on how it goes.  
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Post deleted by Defbob
[Re: Hemiroid]
#706320
05/24/10 11:31 AM
05/24/10 11:31 AM
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Anonymous
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Anonymous
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Re: Hemi Question....
[Re: mark42202]
#706321
05/24/10 01:30 PM
05/24/10 01:30 PM
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Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
B G Racing
master
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master
Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
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Quote:
Quote:
Quote:
Looking at buying a Hemi car and I want to know what kind of limits I have as far as power. It has a Mopar Performance block, Mopar Performance aluminum heads, Eagle 4.150 stroker crank, Manley 6.965 rods, JE custom pistons, Comp Cams- 24-000-9 Hemi Roller, Comp Cams 929-16 Springs, Comp Cams 8921-16 Roller Lifters.
What is the max I can expect from these heads? Will the bottom end support 1200hp? Any input greatly appreciated. This is my first foray into the Hemi world and want to make sure I'm jumping in with a decent foundation.
Step back and reflect for a moment,the answer is obivious.
Ok, I'm assuming you are meaning it won't then? The engine was built by Wheeler Racing engines in MN for NOS. If it was as simple as "reflecting", I wouldn't have posted. Like I said, I have no experience with Hemi's other than drooling about them, lol. Just wanted some advice from those "in the know". Thanks.
To reflect is get more information than you have provided.Nothing supports the notion of handling 1200 hp,are you turbocharging,supercharging or adding a 400/500 NOS kit of some sort?The block prepared correctly will probably handle that kind of hp.The heads depend on the valve train componants used and having the correct cam for the induction and compression.The 4.15 Eagle crank handling that hp,maybe,but do you want to risk that kind of investment?That question is best put to your engine builder and his confidence and knowledge.
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Re: Hemi Question....
#706323
05/24/10 01:35 PM
05/24/10 01:35 PM
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Joined: Oct 2007
Posts: 299
Sparta, TN
mark42202
OP
enthusiast
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OP
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Joined: Oct 2007
Posts: 299
Sparta, TN
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Quote:
Quote:
What is the max I can expect from these heads? Will the bottom end support 1200hp
you won't have to worry one bit about the power.
you'll never even get close to 1200 hp in unless it's with a blower or turbo. 800-850 is about all it will make
I would be concerned that those heads don't have trouble with the seats falling out. There been a rash of that happening around here.
Definitely will have to check that out. Thanks for the "heads" up, lol.
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Re: Hemi Question....
[Re: DaveRS23]
#706328
05/24/10 09:54 PM
05/24/10 09:54 PM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
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Rock Springs
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You can make 900hp with the MP heads and correct port work. Modern Cylinder head built A 572 Hemi with 15:1 compression MP heads with this port work and made 780lb-ft and 920hp peak tq at about 5500 and peak hp about 7000. This was with fully ported MP Cross Ram and 950 HP carbs. Chip on this board has a 3800 lbs street trim Cuda running pump gas and these same heads runs 9.50's in the 1/4. Here is some flow data from my heads. These are the newer Edelbrock castings, and you not need to worry about quality issue's like the older stuff, but they need checked out anyways. 
Last edited by Bob_Coomer; 05/24/10 09:55 PM.
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Hemi Question....
[Re: Bob_Coomer]
#706329
05/24/10 10:48 PM
05/24/10 10:48 PM
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Joined: Jul 2005
Posts: 1,162
s e mich
ro23car
super stock
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super stock
Joined: Jul 2005
Posts: 1,162
s e mich
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Quote:
You can make 900hp with the MP heads and correct port work. Modern Cylinder head built A 572 Hemi with 15:1 compression MP heads with this port work and made 780lb-ft and 920hp peak tq at about 5500 and peak hp about 7000. This was with fully ported MP Cross Ram and 950 HP carbs.
Chip on this board has a 3800 lbs street trim Cuda running pump gas and these same heads runs 9.50's in the 1/4.
Here is some flow data from my heads.
These are the newer Edelbrock castings, and you not need to worry about quality issue's like the older stuff, but they need checked out anyways.
sounds familiar 
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