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Discussion Starter #1
OK here it is
Ok heres my build that cost me about $3,500 parts and machine work only

454 4 bolt Hi Perf block bored .060 over (4.31)
Hi Perf 990 rectangular port heads pocket ported and polished chambers 118 volume
stock rods and crank with ARP bolts (balanced and blue printed)
Keith Black Hyper pistons part#257 25.5cc domes (10.5 cr)
Comp Cams Xtreme Marine xm286hr grind hydraulic roller cam (566 lift 296/302 duration) 112 lobe seperation
Comp Cam roller lifters
Comp Cam one piece push rods
Comp Cams Ultra Pro roller rockers
Comp Cams Springs and retainers
Cloyes Double roller timing chain
Cloyes Timing cover with cam button
Melling high volume high pressure oil pump
14 quart Dooley oil pan
Edelbrock Victor jr 454r manifold
850 Double pumper holley
per comp cams Cam Quest 6 specs program should produce 647 hp @ 6,000 rpm
615 ft lbs torque @ 5,000rpm ?

Any input to what to exspect or what impeller I should run in a Berkley JC? I am currently running an A impeller
 

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Living in a cage of fear
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16,462 Posts
Mines real close to that build.
Same exact cam.

I have Brodix 280cc runner square port heads, TR with 660's, but a little less compression than yours.

Turns an A to 5800. (625 HP) Was a JC, but put a JG bowl with droop and place.
 

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AKA Blownjet 468
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1,205 Posts
my experience with that program is they are very "generous" with their HP
figures:p I look at that program as a CC "sales tool" some are close, others are a little far fetched-
 

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Premium Member
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1,681 Posts
Do yourself a favor and get yourself some Morel hyd roller lifters.
 

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196 Posts
Discussion Starter #6
Ah come on! You really think CC would do thathil:)hil:) Nothing about that build screams 650 HP.[/QUOTE

Thats what I thought in your honest opinion what do you think HP and TQ would be?
 

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AKA Blownjet 468
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1,205 Posts
well if you want to see somthing funny, punch in your same specs in the
compcams "camseller" program, but drop your compression ratio about 2
points, and then look at the HP, now tell me it's believeable:D of course
I forgot you CAN make that kind of power, but ONLY if it's a stock surburban short block:p:)
 

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I'm famous !
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7,043 Posts
Cstaub might be able to give you a harder number. But I would think 575-600 would be a more honest guesstimate.
I agree
 

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AKA Blownjet 468
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1,205 Posts
Do yourself a favor and get yourself some Morel hyd roller lifters.
ANYTHING BUT COMP CAMS :)st I don't like their stuff!!!:|err
 

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Comp Cams Xtreme Marine xm286hr grind hydraulic roller cam (566 lift 296/302 duration) 112 lobe seperation
I'm assuming the XM296HR ?

With the following specs:
Brand COMP Cams
Manufacturer's Part Number 11-456-8
Part Type Camshafts
Product Line COMP Cams Xtreme Marine Camshafts
Summit Racing Part Number CCA-11-456-8
UPC 36584038542

Cam Style Hydraulic roller tappet
Basic Operating RPM Range 2,800-6,200
Intake Duration at 050 inch Lift 242
Exhaust Duration at 050 inch Lift 248
Duration at 050 inch Lift 242 int./248 exh.
Advertised Intake Duration 296
Advertised Exhaust Duration 302
Advertised Duration 296 int./302 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.566 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.566 in.
Valve Lift with Factory Rocker Arm Ratio 0.566 int./0.566 exh.
Lobe Separation (degrees) 112
Computer-Controlled Compatible No
Grind Number CB XM 296HR-12
Valve Springs Required Yes
Quantity Sold individually.
Notes Designed for marine use. Requires thrust button and wear plate.
 

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AKA Blownjet 468
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1,205 Posts
Do yourself a favor and get yourself some Morel hyd roller lifters.
not to get off topic, but does Morel make lifters for lunati and howards?
 

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Registered
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196 Posts
Discussion Starter #15
I'm assuming the XM296HR ?

With the following specs:
Brand COMP Cams
Manufacturer's Part Number 11-456-8
Part Type Camshafts
Product Line COMP Cams Xtreme Marine Camshafts
Summit Racing Part Number CCA-11-456-8
UPC 36584038542

Cam Style Hydraulic roller tappet
Basic Operating RPM Range 2,800-6,200
Intake Duration at 050 inch Lift 242
Exhaust Duration at 050 inch Lift 248
Duration at 050 inch Lift 242 int./248 exh.
Advertised Intake Duration 296
Advertised Exhaust Duration 302
Advertised Duration 296 int./302 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.566 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.566 in.
Valve Lift with Factory Rocker Arm Ratio 0.566 int./0.566 exh.
Lobe Separation (degrees) 112
Computer-Controlled Compatible No
Grind Number CB XM 296HR-12
Valve Springs Required Yes
Quantity Sold individually.
Notes Designed for marine use. Requires thrust button and wear plate.
YEAH Thats the cam specs
 

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Distinguished Member
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5,772 Posts
my experience with that program is they are very "generous" with their HP
figures:p I look at that program as a CC "sales tool" some are close, others are a little far fetched-
I've used several of these "desktop dynos" and generally found them to be pretty optimistic. Most are based on fairly simple air flow calcs so they're limited on all the "real world" variables. They can be a fun tool to learn about how different things like cam events, compression and such, effect overall performance.

ANYTHING BUT COMP CAMS :)st I don't like their stuff!!!:|err
Over the years, I've had really good luck with their stuff (cams/lifters/pushrods). Last build I used Bullet and pretty happy with them as well...
 

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AKA Blownjet 468
Joined
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1,205 Posts
I've used several of these "desktop dynos" and generally found them to be pretty optimistic. Most are based on fairly simple air flow calcs so they're limited on all the "real world" variables. They can be a fun tool to learn about how different things like cam events, compression and such, effect overall performance.



Over the years, I've had really good luck with their stuff (cams/lifters/pushrods). Last build I used Bullet and pretty happy with them as well...
happy enough with BULLIT I'll bet that you don't go back to CompCrap:D
 

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AKA Blownjet 468
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1,205 Posts
Well I better bite my tongue, I do have some cc guide plates, and they are much better than the manley's;)
 

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Premium Member
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1,681 Posts
OK here it is
Ok heres my build that cost me about $3,500 parts and machine work only

454 4 bolt Hi Perf block bored .060 over (4.31)
Hi Perf 990 rectangular port heads pocket ported and polished chambers 118 volume
stock rods and crank with ARP bolts (balanced and blue printed)
Keith Black Hyper pistons part#257 25.5cc domes (10.5 cr)
Comp Cams Xtreme Marine xm286hr grind hydraulic roller cam (566 lift 296/302 duration) 112 lobe seperation
Comp Cam roller lifters
Comp Cam one piece push rods
Comp Cams Ultra Pro roller rockers
Comp Cams Springs and retainers
Cloyes Double roller timing chain
Cloyes Timing cover with cam button
Melling high volume high pressure oil pump
14 quart Dooley oil pan
Edelbrock Victor jr 454r manifold
850 Double pumper holley
per comp cams Cam Quest 6 specs program should produce 647 hp @ 6,000 rpm
615 ft lbs torque @ 5,000rpm ?

Any input to what to exspect or what impeller I should run in a Berkley JC? I am currently running an A impeller
Don't know what the heads flow, more flow better numbers but Shaun's build a couple years ago was pretty similar with some ported 990's, a custom cam from me, and a tunnel and she made around 550ish. I would say you would be in this range. He then put a rotating kit in the block and built a 496 that made right at 660HP with a mild custom cam from me.

I don't think she will make 647HP but should be a solid mid 500HP engine.
 
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