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Old 02-21-2009, 09:43 PM
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Will this SBC combo make 400hp?

Hello whoever can answer this for me I would appreciate it. Fbird if you read this I know you can help me out. On camquest it says I will make around 420is hp and 430 ftlbs of torque. On compcams website with the same cam on a old set of dart torquer sr heads it make only 342 hp and that is a few less then the flat tappet version of the roller cam of mine. Can anyone give me a more accurate number or is camquest pretty accurate?

Ok just got all my parts to do my engine and here is my setup. 350 4 bolt main has been decked just .010 and is a new block with 4 inch bore.

Scat cast steel crank 3.480 with 4340 forged rods with Speed pro flattop pistons 4 valve relief with 1.560 compression height. Carb will be edelbrock performer 600cfm, intake edelbrock performer rpm, cam will be comp xtreme energy roller with 218/224 @ 50 with 497/502 lift and heads are world product sportsman II and will only be gasket matched to intake.

Compression will be around 9.1 with the 72cc chambers. Going in 96 s 10 with 2000 2200 rpm stall with 350 turbo. Thanks for help on guessing.
Eric

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Old 02-21-2009, 10:38 PM
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The 340 is way closer to what you'll see on a dyno.
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Old 02-21-2009, 10:49 PM
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comp cams has a program that you can download, the one they use, that you can pick all the different options you have on your car: heads, intake, exhaust, compression, ect... and it will give you estimated horsepower and torque.


http://compcams.com/downloads/register.asp

use this link and enter your info and it will let you download for free, fast and easy to use...
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Old 02-25-2009, 08:06 PM
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Hello Fbird thanks for the help. I have the 72 cc heads already but I cam get them milled to get to 69cc's. But what about my cam I was looking at the next level up extreme energy cam the 276hr wich has 224/230 @ 50 with 502/510 lift. I want to stay with the 1.5 ratio since I will already have a fortune in machine shop bills once I get the blocke decked and my rotating assembly balanced ec. Would the 276HR cam still be good in a daily driver and not make it do too much different then the previous cam but make the heads breath better and would this cam work ok being able to drive through town rush hour traffic and not get my motor all loaded up and not make it consume more fuel then the 262 cam? I am trying to find the balance as best as possible with out going oveboard. This will be my only vehicle I have to drive all the time so decent street manors are a must but want performance to go along with it with a nice lope at idle with being too much but more then stock smooth type idle. I hope you respond cause you have helped me select my stuff so far and I have taken all your advice. Thanks Eric
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Old 02-26-2009, 07:27 PM
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Hey thanks for the comments but what I was meaning was I would have to get the pushrod holes elongated in order to use 1.6 rocker arms, at least that is whay is says with the papers that came with the heads.. I am going to get my heads milled down some and get my block decked as well to get more compression. Then I will call comp cams tech when I go to get my cam and ask them what they suggest on a custom grind and go from there. Thanks for help cheers.
Eric
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Old 02-26-2009, 08:18 PM
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thanks for the tip. I don't know much about what to do yourself wise on cylinder heads. I am a rookie when it comes to engines and things you can do yourself wise.
Eric
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