|10-07-2004 08:06 PM|
You are on crack foestauf
You need to put down the crack pipe my friend....
Come on now... Give me 5K to spend on a big block and you take 5K to build you a small block and then we will meet up and see who builds more power.
You are on some heavy stuff if you think someone has to spend 12K on a BBC to keep up with a small block.
You need to stroll around the pits some more or go to some real races.
|09-29-2004 01:19 PM|
I have ran high power small blocks all my short life and have ran 10's with them, but I just built my first Big Block for one reason: money. Get to making 600 hp and you are looking at the limits of a stock casting small block... especially if you run 400's. A filled 509 casting 400 with all the money in for aftermarket caps, splied mains, etc. really adds up and so do the 3,000 dollar aftermarket blocks. You can take even a 2 bolt main 454 block... add ARP studs and be set to 1,000 hp.
To get back to the subject at hand... What I would do would vary by what you have. I would add ARP studs and get some forged pistons when you rebuild the lower end. A set of closed chamber oval ports like the 215's work very well with some work done to them and shoot for 10.5 or so compression. Keep the headers modest for a street car with 1 3/4 to 1 7/8's primaries and get a cam matched for your combo... I recomend Comp Cams XE series. Top it off with a dual plane intake and you should have a great driver or if you want to race... throw a 150 nitrous shot on it cause she will take it.
|09-25-2004 11:21 AM|
Big blocks are junk?
A semi stock 454 will run 12s in a light car with out expensive parts and steep gears. The big block will probably last longer and be more fun on the street because of the low end torque.
|09-24-2004 08:12 PM|
my trans am runs 7.80 in the 1/8th mile with open headers and slicks and that converts to a 12.25 in the quarter.
i think thats a fast street car.
and is very driveable.
i tryed it out last week with my G Tech pro and it said i did a 12.79 was my fastest time and that was with the exhaust on and slicks.
|08-08-2004 03:18 PM|
big blocks are the way to go! big cubes is where its at, alot less revs and work for the block compared to a smallblock..
|08-04-2004 10:01 PM|
Are you sure? Give me 12 grand and I'll show ya "500horsepower.
I do agree it does cost more to build a Big Block, but after you reach a certain power level, cubic inches is the way to go, either big inch small blocks or big blocks.
Also, with that kind of power, the more cubic inches will be milder and more street friendly.
There is a reason the fastest street cars run big blocks.
|08-03-2004 02:54 PM|
Yeah best way to pick that 454 up. Is get a cherry picker, pick it up and sell it:-)
Sorry I'm too anti-big block.
Big block means big dollars and that is all.
It's far too sad to see guys that spend 10's of thousands of dollars just to make thier big blocks keep up with small blocks.
One of the big issues with BB's is thier heads, the heads on them are just crap. Don't know how many of them I've seen goto crap.
Every thing you do with a BB is twice as much as SB's. And you have a lot more mass to get moving.
So you can take the big block, spend 12-14 grand get a good going 500hp machine. Or you can take a small block, spend 4-5 grand and get a good going 600-700hp machine. Take your pick:-)
|08-02-2004 09:38 AM|
Here is a pic of my 454 in my impala 65 wagon.
It came from a small yellow chevy shoolbus
461cui with new pistons,bearings,holley 750dp, headers, edelbrock intake, some other heads (dont know what kind).
but i would need anoter cam to get som more horses!
im new...so this is my first post! hope u like the picture.
|07-28-2004 01:42 PM|
You can count on about $5,000 to do it right.
oil pump... valve train...intake..etc etc.
|07-28-2004 09:40 AM|
I'm building a 454 and while it's my first motor, I've done alot of reading on the subject.
The rectangular port heads are not what you want for the street. They don't flow well at the lower RPM's, but they do open up in the high RPM's...so in other words, bad for the street.
The oval port heads are what you want, not to be confused with the "peanut port" heads found on some trucks. There is a grouping of oval port castings that are desireable...I only remember my castings which are 353049. 110 CC heads...some list them as 113 CC heads. Throw bigger valves in them (requires some machine work), clean them up a little and you've got some nice heads for the street.
ALTHOUGH, I'd really have to question whether it might be a better investment to spend the money on the lower end world castings. My heads cost me about $750 to be reworked.
-New seats & Cut
I see some places you can get the low-end world castings for about $400 each bare...maybe less if you shop around. Of course you're still going to have to put some money into them, but I'm sure they are much improved over old-chevy castings.
Here's a good article to give you a rough idea of the costs involved with building this thing...542 horsepower:
|07-28-2004 09:39 AM|
|ratlover||Just built a 454 for my chevelle. I put in a comp cams 268h with flatop forged pistons +.040. I spent some money on machining the block. Pistons were .020" in the hole, so I had the block decked accordingly. also shaved the heads to increase compression a few more points. Kept the 781 oval port heads. did some port work, mostly on the exhaust side. concentrated on the bowls and short side radius. I have yet to track test it, but it is fun so far...|
|07-23-2004 07:03 PM|
i put the comp cams 280 h magnum in mine with all matching parts.
roller tip rockers, springs,locks and retainers.
i also have 1967 closed chamber heads on it and 8.5 to 1 compression pistons.
it now has around 9.5 to 10 to 1 compression
and a duel plain intake with a 750 bubble pumper carb.
and it makes my trans am fly.
its always best to match your parts.
and a good duel plane intake is better for the streets.
a solid lifter cam is not a very good choice for the streets.
my next rebuild im going with a hydroulic roller cam and roller lifters.
now thats the way to go if you can afford it.
|07-23-2004 05:46 PM|
To get it into the 12's also has a lot to do with what you are putting it in. The 70 SS's ran in the high end 13's from the factory. With different carburation, intake, cam, and headers in a lighter car you can see the 12's pretty easy. But remeber also that you are talking adding some performance goodies to a used motor. To do it really right the engine should be totally rebuilt and a big block is considerably more money to build than a small block. Keep us informed as to how it turns out.
|07-21-2004 11:16 PM|
hell, you don't need to do too much to a 454 in a rather light car to be doing 12's. Decent factory heads, good exhaust and a mild cam will do that.
|07-21-2004 06:48 PM|
|mean_1||then u might consider a new cam...i'd recommend comp cam stick with a solid lift for maintance and get some machine work done on your heads and upgrade ur intake and a bigger carb....looking for forced induction then u need to look into lower compression, o ringing block...copper gaskets...12 second u can do naturally aspirated...|
|This thread has more than 15 replies. Click here to review the whole thread.|