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Old 12-21-2010, 01:56 AM
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Achieving the most power under the curve from a 454bbc

I would like to know how to build a street driven 454bbc (carbed,HEI) to achieve the most power under the curve. I have 1,400 to spend on a scat kit or one of equal stats. I was gearing toward the TFS 290/119cc aluminum heads and a lunati 580/589 lift with an airgap. 1.7 scorpions full rollers with 1pice rods.How could my ideas be tweaked (vague as they are,lol) to achieve a nice balance between tq and hp. 3400 lbs caprice coupe, th350,342 gm10 8.5. Some help with tire size would be cool too. Goal of 500hp/550ftlbs is the objective. Max rpm 5,700-6,000. Got a hole burning in my pocket!!!!!!lol.......

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Old 12-21-2010, 09:48 AM
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I have a nice street driver build on the DynoSim that should run on pump gas with a 0.045"-0.055" squish.
454 +0.030"
Racing Head Service cast iron 320 heads
http://www.summitracing.com/parts/RHS-11301-02/
10.2:1 static compression ratio
850 carb mounted on an Edelbrock RPM or Weiand Stealth
Long-tube headers
CompCams 11-450-8 retro-fit hydraulic roller
http://www.summitracing.com/parts/CCA-11-450-8/
574 hp @6000
586 ft/lbs @4500
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Old 12-21-2010, 10:06 AM
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Only problem tech is that those two pieces with lifters are somewhere around $2100 and he has $1400 to spend.

To the OP what do you currently have for heads?
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Old 12-21-2010, 10:17 AM
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tfs 290,119 oval port,but really had been looking at the pro filers.
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Old 12-21-2010, 10:36 AM
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$1400 really isn't enough to just do a good rebuild... Your power goals are fairly modest, but your budget is lacking to build much of anything.
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Old 12-21-2010, 01:27 PM
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For S1,399.95 you can get an Eagle cast crank stroker kit from Summit and others to make 489 or more CI with your block. THAT will get you power under the curve no matter what.

tom
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Old 12-21-2010, 01:33 PM
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thats about what I got to spend on a rotate asym. Have heads,intake,carb just trying to figure a good cam and comp ratio
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Old 12-21-2010, 02:14 PM
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$1400 to spend. good old No2.

Sad to find that the secret to low #'s was more engine inches .
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Old 12-21-2010, 02:21 PM
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Quote:
Originally Posted by spinn
$1400 to spend. good old No2.

Sad to find that the secret to low #'s was more engine inches .
He can spend the same $ on a 454 kit and have less power.............


tom
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Old 12-21-2010, 02:35 PM
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Quote:
Originally Posted by machine shop tom
For S1,399.95 you can get an Eagle cast crank stroker kit from Summit and others to make 489 or more CI with your block. THAT will get you power under the curve no matter what.

tom
my homework has concluded, that i would stay away from eagle cranks,spend a little more and get a scat.
but someone more knowledgeable may say different.
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Old 12-21-2010, 02:46 PM
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Quote:
Originally Posted by matts37chev
my homework has concluded, that i would stay away from eagle cranks,spend a little more and get a scat.
but someone more knowledgeable may say different.
The biggest differences between Eagle and Scat are Scat has better I-Beam rods (SBC) and that, more often, Eagle cranks need to be turned to correct journal sizing and geometry. The price difference between the two is close to what it costs to get a crank turned.

tom
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Old 12-21-2010, 05:08 PM
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I've built a few sbc with eagle cranks to only have to have them turned and cleaned up. I do prefer the scat crank over the eagle....... But this is a bbc,lots of rotational mass!!! So I do want to be aware of any flaws. So far from my research,I have figured to stay around 9:5.1 or so. And around 600 lift/235-240. Street car,3400lbs,3.42s, idle to 6000 maxrpm. I know you guys could put together a combo with 550/600hp all under 6000rpm. Or its back to the 407sbc!!!!!!lol
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Old 12-21-2010, 05:30 PM
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Sorry,I missed techinspector post. That's a very reasonable combo. But for the cost a extra weight,it just dosent seem worth it. But I'm so curios about the "dark side",lol. I just finished a 468bbc for a customer that has monsterious amounts of torque all through the rpm range!! But its less of a street car then desired. 3500 stall th400 in a 4500lbs car. That's not what I'm after. I just know I could build a awesome budget bbc that's more than street able and capable of 650-700hp with all of you guys input. There are some great minds on this site. Tech and ericnova72 being the main two that I've spoke to. But I've read thousands of post by all of you. None of which were lacking in talent I have a total of 5,000 for a build. That includes a block,lol. So if there are heads that would be a better choice than the tfs or profilers,like the RHS heads tech mention. Which from what I've read aren't a bad set of heads.
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Old 12-21-2010, 08:47 PM
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Quote:
Originally Posted by brians407sbc
Sorry,I missed techinspector post. That's a very reasonable combo. But for the cost a extra weight,it just dosent seem worth it. But I'm so curios about the "dark side",lol. I just finished a 468bbc for a customer that has monsterious amounts of torque all through the rpm range!! But its less of a street car then desired. 3500 stall th400 in a 4500lbs car. That's not what I'm after. I just know I could build a awesome budget bbc that's more than street able and capable of 650-700hp with all of you guys input. There are some great minds on this site. Tech and ericnova72 being the main two that I've spoke to. But I've read thousands of post by all of you. None of which were lacking in talent I have a total of 5,000 for a build. That includes a block,lol. So if there are heads that would be a better choice than the tfs or profilers,like the RHS heads tech mention. Which from what I've read aren't a bad set of heads.
That motor I Dynosim'd for you makes 453 ft/lbs @2000. Think that might shread some tires?
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