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Head flow = horsepower #1179221
02/16/12 01:52 AM
02/16/12 01:52 AM
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MN
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dustyswinger Offline OP
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dustyswinger  Offline OP
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MN
Last year one of my heads sprung a leak and I think it's time to upgrade. I have a stock block 416 with a mechanical cam 265@.050 with 600 lift, 11.25 to 1 compression, factory cast iron heads that flow 271 and 171, a 1 7/8 headers, victor 340 intake and a 950 hp carb. My question is what should i pick up going to a set of ported edelbrocks that flow 299 and 218 and a super victor. My motor made about 515 HP and touqe before the change. Im looking for reduced ET.
I can also get a roller cam set up The specs were 260/266 degrees duration at 0.050 and 0.683/0.657 lift but I think that would be a little too much for a stock block.
What do you guys think? Thanks Craig

Re: Head flow = horsepower [Re: dustyswinger] #1179222
02/16/12 08:05 AM
02/16/12 08:05 AM
Joined: Mar 2005
Posts: 331
Cincinnati Oh
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fasthawk6 Offline
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Cincinnati Oh
If your going to go roller use indys and i would say a 100 hp gain. I personaly went from the indybrock and a soild lift cam with your same intake and carb to a roller ,indy-1's and there intake and picked up 8mph but the intake and heads are cnc'd.

7073853-dart.jpg (70 downloads)
Re: Head flow = horsepower [Re: dustyswinger] #1179223
02/16/12 09:26 AM
02/16/12 09:26 AM
Joined: Dec 2006
Posts: 1,178
Indy
FlyFish Offline
super stock
FlyFish  Offline
super stock

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Indy
What dose your car run now, and what ET are you shooting for?


67 Barracuda street car, 408, e85, 1.38 60', 6.44 @105.9 in the 1/8 mile, 10.19 @130.5 in the 1/4...so far....
Re: Head flow = horsepower [Re: dustyswinger] #1179224
02/16/12 11:03 AM
02/16/12 11:03 AM
Joined: Jun 2010
Posts: 3,112
LONG ISLAND
fishy340 Offline
master
fishy340  Offline
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Joined: Jun 2010
Posts: 3,112
LONG ISLAND
fyi your not gonna need a r block for 600 or 650hp...it is nice to have,but not a must. there strong not like 440 blocks

Re: Head flow = horsepower [Re: fishy340] #1179225
02/16/12 11:26 AM
02/16/12 11:26 AM
Joined: Aug 2006
Posts: 2,141
junction city oregon
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viperblue72 Offline
top fuel
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junction city oregon
I would guess about 3 tenths gain. I don't think standard edelbrocks are the best choice for you but they will work for an economical stand point. You'll gain a little compression also.

Re: Head flow = horsepower [Re: viperblue72] #1179226
02/16/12 12:32 PM
02/16/12 12:32 PM
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Posts: 523
MN
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dustyswinger Offline OP
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MN
I have a cam motion cam right now. That lift is alot to me too. The car has run the best of 10.43 at 127 but normally runs 10.50-10.60 and 126. It 60' in the 1.38-1.43 range. I am trying to get 10.20 I think with just the heads I would get there. With the cam who knows. Thanks Craig

Re: Head flow = horsepower [Re: dustyswinger] #1179227
02/16/12 12:47 PM
02/16/12 12:47 PM
Joined: Jan 2003
Posts: 4,002
Joplin, Mo
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rt66jim Offline
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Joplin, Mo
Quote:

I have a cam motion cam right now. That lift is alot to me too. The car has run the best of 10.43 at 127 but normally runs 10.50-10.60 and 126. It 60' in the 1.38-1.43 range. I am trying to get 10.20 I think with just the heads I would get there. With the cam who knows. Thanks Craig




What does your car weigh?

Re: Head flow = horsepower [Re: rt66jim] #1179228
02/16/12 01:32 PM
02/16/12 01:32 PM
Joined: Dec 2005
Posts: 293
Kansas City Metro
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mbogina Offline
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Kansas City Metro
Basic rule of thumb for HP "POTENTIAL" is (cyl head flow at 28") x .257 x (number of cyls). Many high end builds can exceed this, milder combos will never reach it.


Be a Rebel- Break the Laws of Physics!
Re: Head flow = horsepower [Re: mbogina] #1179229
02/16/12 02:29 PM
02/16/12 02:29 PM
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Posts: 523
MN
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dustyswinger Offline OP
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dustyswinger  Offline OP
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MN
3165 with me in it

Re: Head flow = horsepower [Re: dustyswinger] #1179230
02/16/12 06:28 PM
02/16/12 06:28 PM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
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Dodgem  Offline
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Ontario, Canada
Well 40 lb off with aluminum heads thats .04 to start and an easy .26 of in HP gain!

Re: Head flow = horsepower [Re: Dodgem] #1179231
02/29/12 02:54 AM
02/29/12 02:54 AM
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Posts: 523
MN
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dustyswinger Offline OP
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MN
I ended up buying the whole deal and deceided to put a steel crank and set of rods in it and let it buck. I'm kind of on a budget here and have found a scat crank for 640, a K1 for 689 and BPE has them for 629. Any opionions on these cranks? Just looking for a decent product for the best price, just like everyone else. Thanks Craig

7095728-LizWk(66).jpg (49 downloads)
Re: Head flow = horsepower [Re: dustyswinger] #1179232
02/29/12 03:10 AM
02/29/12 03:10 AM
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366 Offline
I Live Here
dartman366  Offline
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Posts: 13,247
Mt. Vernon, Ohio
Quote:

I ended up buying the whole deal and deceided to put a steel crank and set of rods in it and let it buck. I'm kind of on a budget here and have found a scat crank for 640, a K1 for 689 and BPE has them for 629. Any opionions on these cranks? Just looking for a decent product for the best price, just like everyone else. Thanks Craig


All good crank's, but I were to do another smallblock I would go with a BPE just because Rod is a really good and standup guy and has thought his product out.


Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
Re: Head flow = horsepower [Re: dartman366] #1179233
02/29/12 11:39 AM
02/29/12 11:39 AM
Joined: Jul 2006
Posts: 4,595
On the south side of Nowhere
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S/ST 3040 Offline
master
S/ST 3040  Offline
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Joined: Jul 2006
Posts: 4,595
On the south side of Nowhere

Last edited by S/ST 3040; 02/29/12 06:37 PM.
Re: Head flow = horsepower [Re: S/ST 3040] #1179234
02/29/12 12:28 PM
02/29/12 12:28 PM
Joined: Jan 2003
Posts: 5,484
SoCal
Brian Hafliger Offline
master
Brian Hafliger  Offline
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Posts: 5,484
SoCal
I'm looking forward to seeing the results!


Brian Hafliger
Re: Head flow = horsepower [Re: dartman366] #1179235
02/29/12 03:34 PM
02/29/12 03:34 PM
Joined: Oct 2008
Posts: 458
Michigan
BPE Offline
mopar
BPE  Offline
mopar

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Posts: 458
Michigan
Quote:

Quote:

I ended up buying the whole deal and deceided to put a steel crank and set of rods in it and let it buck. I'm kind of on a budget here and have found a scat crank for 640, a K1 for 689 and BPE has them for 629. Any opionions on these cranks? Just looking for a decent product for the best price, just like everyone else. Thanks Craig


All good crank's, but I were to do another smallblock I would go with a BPE just because Rod is a really good and standup guy and has thought his product out.




I might be a little biased but I would get one from BPE. Sorry I couldn't help myself.

Rod

Re: Head flow = horsepower [Re: S/ST 3040] #1179236
02/29/12 05:43 PM
02/29/12 05:43 PM
Joined: Jul 2008
Posts: 361
Canada
onig Offline
enthusiast
onig  Offline
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Posts: 361
Canada
Quote:

Cylinder heads and HP




Link does not work.


69 Dart
Re: Head flow = horsepower [Re: onig] #1179237
02/29/12 06:38 PM
02/29/12 06:38 PM
Joined: Jul 2006
Posts: 4,595
On the south side of Nowhere
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S/ST 3040 Offline
master
S/ST 3040  Offline
master
S

Joined: Jul 2006
Posts: 4,595
On the south side of Nowhere
It should work now. Maybe an I-phone can't do everything.







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