600hp 454

I've got a 454 that I'm really looking to make a solid 600 horsepower with. Currently I've got a 292h magnum cam, weiand stealth intake, 781 big oval head with some polishing and 2.19 1.88 valves, holley 750 hp carb,and about 10-10.5:1 compression. It's not put together yet, but I was wondering on any guessing on power levels with this combo?
To hit the 600 mark maybe nitrous? I thought about a weiand supercharger would be sweet,but how do this sound with exhaust? I've heard some run and they don't have that real lumpy idle I love from a big cam?


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What else do you know about this engine ??
What CR ?
Forged or cast pistons ?
Flat top or domed ?
Forged crank ?
What rods ?
4 bolt mains ?
That cam wont get you to 600 hp,you will need more lift,also maybe some work to those heads.A bigger carb may be needed also,I would suggest at least 800 cfm or bigger.If its 10-10.5 cr as you think,that is too much for a blower.If you go nitrous,or blown,you will need to design your combo for a specific build up.Proper machine work is also a good idea,done by a competent machine shop,bore & plate hone,align hone,block decked,rotating assembly balanced,etc...Also very important is a correctly matched valve train,good pushrods,correct valve springs,proper valve train geometry....
A big wallet may also be needed LOL
Guy

does it make a big difference boring and honing with a plate
or is that more of a super high perf applaction
if a you are doing somthing more in the 400hp (bbc)is it as important?

If you're basically at ground zero a 496 kit is a good option. 42 more cubes makes it a LOT easier to hit 600 hp ona streetable engine. Hell, 33 more cubes on a sbc makes a BIG difference on the street where RPM is highly limited.

It's got 4 bolt mains. Around 10:1 compreesion with current hypertenic pistons. Cast crank. I had thought about a 496 kit if I could find a good one around 1000 dollars. Any opinions on a camshaft? I'm looking for a nice aggressive lumpy idle. That's what I liked in the 292h.

CNC Motorsports.com is a really good outlet for eagle and scat 496 kits. I just went through them for my 504, (stroked 454) and you can get a good kit with forged pistons for somewhere between 1100.-1700.00 Depending on what different forged parts and balancing etc, I went internally balanced but opinions vary. My combp will go 700+ o pump gas. Theres no reason you cant make the power if you've got good heads matched cam and so on. Ask for Clint he'll do you right, Good luck

I think I'm going to do this...I'll polish and do some port work on the heads. They'll have the big valves also. I'm looking to buy a 850 Holley as well. It going to have around 10.2:1 compression. I have hypertenic pistons now but probably get forged ones. I have a stock gm cast crank.
My question is as far as the rotating assembly goes would it be cheaper to get my crank, pistons and some sort of new rods all machined and balanced together, or get a balanced kit? I think a 496 is going to be out of my budget. In the end I'll probably juice it with like 125 shot.

Im sure it would be cheaper to use the stuff that you already have for sure. I never have bottle fed anything but you might really want to research the 496 kit because outfits like powerhouse performance in bakersfield california and cnc motorsports among many others really do sell affordable stroker kits for big block chevys. It may be a wash after you buy a fuel pump, nos kit, forged pistons and so on compared to just getting a 496 kit. I think the power would probably be a little more with the bottle but you'l have to keep filling it to. Either way its a really good combo and should slam your head back if it is done right. The heads are where the powers at so In my opinion I would spend some time there and match the cam really good to what your heads will do. Also I dont know if you are planning to have someone else work your heads or not but we have used electronics pro comp cnc ported aluminum heads and there around 1200.00 and make incredible power. Even if you just built a good solid running 454 and you do it right It'll be a fun ride but deffinately check those two companys out that sell the strokes kits it might surprise you there cheaper than most people think and good quality.

I've got a reliable machine shop going to work the heads. I have seen the procomp but I think I'll stick with what I have. I've seen plenty guys at the local track running tens with these 781 heads.
I'll still think about the 496 kit, but they're still expensive. If I take back my hyper pistons the forged ones shouldn't put me out much. So what size cam am I looking at to get the power I'm after? I really want to stick to a hydraulic flat tappet mill. I'd like around 2500-6500 like my 292h. I'd like to keep the 292h just because I already have it as an entire cam kit. Any recommendations though on a cam to hit the 600 mark?

To answer Matts question,if you want a round cylinder,yes using a plate when honing is very important.Its very highly recommended for any type of performance build.
Heres a Lunatti Voodoo cam,
http://store.summitracing.com/partd...33&autoview=sku
Something like this will help your 454 attain your 600 hp goal.As pointed out,matching your heads & cam will be a cheaper alternative than filling up a NOS bottle,and all the acessories that are needed with it.Your cast crank should be good for 600 hp,although better quality bolts would be cheap insurance.Getting the proper machine work will also help.Having the block decked so you can end up with a quench height of 0.040-0.045 will help prevent detonation with higher cr,which in turn will allow you to set your timing at + or - 38 degrees,which is what big blocks seem to like.When I had my machine work done,it was $ 1500 in Canadian dollars,that included having new rod bolts installed,pistons pressed on,align hone,block decked,bored & plate honed,balanced,crank polished ,new cam bearings installed,all new bearings and an oil pan heater bung TIG welded in the oil pan.It was money well spent.And to build a big block to this level will take lots of $$$$$$$$$$$,especially for tires after its done LOL
Guy
PS That 292 cam does not have enough lift to acheive your goals,a solid roller is the way to go.The Voodoo line is probably the best off the shelf grind available.

Best off the shelf grind? That is a VERY tall statement to make. Its good, I'll concede that, but best? I don't know that I'd give it that. To be honest I don't think there is a true best since so many factors can affect that call. It is a good line for an off the shelf high hp street engine though.

Check below...$900... I think balancing is $200 (at least that's what they charge for a 350 kit...BBC could be more).

http://competitionproducts.com/prod...umber=CK496D-60

that and these...

http://competitionproducts.com/prod...?number=PAT2214

plus this...

http://competitionproducts.com/prod...umber=121313-10

well on your way to 600hp...

However...those Patriots heads can be kind of a crap shoot...I've seen pictures of some pretty poor SBC stuff from them- they are imports.

That cam may not be the ideal grind but it'll get you in the ball park.

I think you will need the compression more towards 11:1 to run a cam you'll need to get to 600hp if your going NA.

The reason I say its the best is because I know the gentleman that designed most of Comps line,and later the Voodoo line,and he will tell you that each new line just keeps getting better.
But I do agree with you about so many factors entering into the equation.Thats why I had a custom made solid roller made for me by the above mentioned person,UDHarold.Gearing,compression,heads,tranny,w eight,goals,etc.... all need to be taken into acount.
Guy

Harold is a damn good cam guy, I don't knwo him personally but I follow a LOT of what he writes. he knows his ****. But even he will tell you they are not the absolute best. You really can't give that to any one line of cams- too many parameters. As I said though- great cam guy.

If I went the roller path, what all is invovled with a roller cam? Lifter,rockers, engine block mods? Can I use a roller set up with my 781 heads? What is the idle quality of a roller cam? Won't a roller set-up cost a hell of alot more?