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  #61 (permalink)  
Old 03-12-2014, 07:55 AM
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yes understood but id have to go with an aftermarket aluminum heads that are going to cost a fortune. even iron heads are 1200 when me with my little ls 360 cube cam only make 600. i was 600 on nitrous this is wheel hp not fly. i see big blocks like to go by flywheel hp. that thing was radical tho. boost is street friendly i can ride 300 hp and turn it up to 650 now that's beautiful!!!

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  #62 (permalink)  
Old 03-12-2014, 07:57 AM
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that old school saying. no replacement for displacement got over ruled when boost came in to the picture
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  #63 (permalink)  
Old 03-12-2014, 08:04 AM
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add boost to a 454 and make a very mild 1000 hp engine.
with boost ,the bigger the engine the bigger the advantage. Its still horse power per cubic inch. With a bigger multiplyer the bigger the spread in end results.
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Old 03-12-2014, 10:20 AM
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Originally Posted by vinniekq2 View Post
add boost to a 454 and make a very mild 1000 hp engine.
with boost ,the bigger the engine the bigger the advantage. Its still horse power per cubic inch. With a bigger multiplyer the bigger the spread in end results.
a'lot less complicated and less money. i seen a 4.8 make 1200 horse that's not what im shooting for but these motors are bad *** hands down. i have raced people with 30k in the hood and and they have got me by a fender. then all the big block guys come and ask yo what are u running!! lil ls 360 ci and i get mad props. lol

that aside... i got the ok for trading the cam so im going to stick with the big block for a while magnum 280h .
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  #65 (permalink)  
Old 03-12-2014, 12:27 PM
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did I miss something or are you still sub 8:1 trying to use a big cam? or are you turboing the big block?

do you have an ls motor laying around or are you going to have to buy one and do all the fab/wiring/computer work to make it fit, PLUS turbo it?

that work and time is going to surpass 1000 pretty quick, plus you already have a good foundation in the 454, you just need to make your combo match. I think your money is much better spent on an afternoon head swap.

I don't think you realize how much more fun a dd big block making 500+ ft lb at 2500, 3000 rpm could be.

Listen to the power potential Vinnies talking about with just a little work.
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Old 03-12-2014, 01:31 PM
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Originally Posted by clwhoops44 View Post
did I miss something or are you still sub 8:1 trying to use a big cam? or are you turboing the big block?

do you have an ls motor laying around or are you going to have to buy one and do all the fab/wiring/computer work to make it fit, PLUS turbo it?

that work and time is going to surpass 1000 pretty quick, plus you already have a good foundation in the 454, you just need to make your combo match. I think your money is much better spent on an afternoon head swap.

I don't think you realize how much more fun a dd big block making 500+ ft lb at 2500, 3000 rpm could be.

Listen to the power potential Vinnies talking about with just a little work.
im sorry i got to change the cam to a magnum 280h. so i should be good now with a'lot less lift. this cam is a 520 lift. so i might be able to shave a'lot more off the heads to get the compression up. i may like how it runs and keep the big block. my local guy is telling me to shave 45 thousand off and if i have intake issue there are shims to fix it...
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Old 03-12-2014, 09:54 PM
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any opinions??
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Old 03-12-2014, 10:53 PM
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Originally Posted by ss454lemy View Post
any opinions??
I still say get some closed chambered 396 heads (110cc) which should get you about 1 extra on the compression, and you'll still have a set of usable 049's if you decide to go with a turbo or blower later.

I scored a set of them recently for about $300
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Old 03-13-2014, 06:46 AM
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I still say get some closed chambered 396 heads (110cc) which should get you about 1 extra on the compression, and you'll still have a set of usable 049's if you decide to go with a turbo or blower later.

I scored a set of them recently for about $300
man i been looking i haven't seen any other heads under 500 each i really don't have the cash right now to spend on it.. i would have to wait a while and build a better combo. if i stay with this, im going to look for some brodix heads and make it a roller motor. just want to have some fun with is as i go along.
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Old 03-13-2014, 07:31 PM
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how much compression can i pick up shaving 40 thousand off ?? off the 049s'
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Old 03-13-2014, 09:12 PM
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Originally Posted by ss454lemy View Post
how much compression can i pick up shaving 40 thousand off ?? off the 049s'
That is going to amount to about 5cc's of volume. On a 454 with open chamber heads, you will gain only about 0.4 points of compression. You can't mill enough from the Open chambered heads to make a significant improvement.

Closed chambered heads or different pistons is the only two possible answers.
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Old 03-14-2014, 06:30 AM
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Originally Posted by ericnova72 View Post
That is going to amount to about 5cc's of volume. On a 454 with open chamber heads, you will gain only about 0.4 points of compression. You can't mill enough from the Open chambered heads to make a significant improvement.

Closed chambered heads or different pistons is the only two possible answers.
im done trying with this motor im going to shave put together and see how it turns out. i don't have the funds for this.. thank u all for the help i grately appreciate it. i don't understand how people are making power with these heads i really don't. i seen a bunch of builds without putting pistons with good results.
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  #73 (permalink)  
Old 03-14-2014, 09:03 AM
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good results Vs great results

Quote:
Originally Posted by ss454lemy View Post
im done trying with this motor im going to shave put together and see how it turns out. i don't have the funds for this.. thank u all for the help i grately appreciate it. i don't understand how people are making power with these heads i really don't. i seen a bunch of builds without putting pistons with good results.
low CR 454 will make good power.
any modern engine with correct compression,well matched cam and heads that flow(note,its the combination,not just one part) will make great power.
A mild 575 plus horse power and 575 pounds torque BB will destroy most power trains.
A 440 ish horse power 454 with 500 pounds torque will get your attention.A 375 hp 460 pounds torque throw together engine with fair parts is still going to perform better than most well built street 5.7 liters.
The 100 cubes counts a lot.
compare a 250 cube inline 6 to a mild 327 for fair comparison.
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  #74 (permalink)  
Old 03-14-2014, 09:29 AM
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Originally Posted by vinniekq2 View Post
low CR 454 will make good power.
any modern engine with correct compression,well matched cam and heads that flow(note,its the combination,not just one part) will make great power.
A mild 575 plus horse power and 575 pounds torque BB will destroy most power trains.
A 440 ish horse power 454 with 500 pounds torque will get your attention.A 375 hp 460 pounds torque throw together engine with fair parts is still going to perform better than most well built street 5.7 liters.
The 100 cubes counts a lot.
compare a 250 cube inline 6 to a mild 327 for fair comparison.
i will never know how much it puts down because i don't use dynos. just want a fun truck. nice sound and about 400 440 hp that's all id need for fun although i have a nice offer of a 69 c10 that i might jump on and build a motor for it. if that was to come threw id build 496 or 502 and make a pro street style truck !
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Old 03-14-2014, 12:49 PM
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Here's another idea.



H581CP $300.00 / set. (Yeah, I know, you still need rings and gaskets, etc)

I get 10.08 compression with 122cc heads ... perfect.
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