|01-17-2013 08:43 AM|
I'm also not up to the task of making an LS work with the computer, and not willing to learn at my age either. I have however looked at LS options, and the possibility of making one work with a carburetor. They actually make kits that have a intake manifold, new water pump housing, and a cam to convert an LS to a carb and distributor!
The cam has a front drive gear, and the new water pump housing has a hole for a distributor to drop in. Can't remember which distributor, but it's a common one, so easily found new or used. The write ups I've seen say you'll lose a small amount of HP over an injected, computerized LS, but the ease of working on it, and lack of coil packs and crank trigger make it more appealing to me.
Another cheaper option is the LQ truck motor, which is a cast iron block LS, with aluminum heads. Not quite the HP, but easily upgraded to LS with some minor work. I see LQ motors often for around $500, where LS motors are rarely under $1500, even with some mileage on them.
|01-17-2013 07:51 AM|
|Moose2||Lots of good comments and I appreciate them all!! I have a well built 383 stroker in my '28 Buick and I love it, but I wanted to do something else with the '64 Riviera, never had a big block and wanted to at least consider it. My buddies have told me that an LS series would be a smart option (maybe an LS3?) but I'm hesitant because I'm over my head with that technology. I'm not very smart about computer driven engines and stuff like fuel system requirements. I'm an old barnyard mechanic and the simpler it is, the more successful I'll be...... I'm not the sharpest knife in the drawer.|
|01-16-2013 06:11 PM|
|1971BB427||The reason for a big block is it makes torque, and hp at lower rpm's, and you don't have to push it as hard to get to 400hp. Yes, you can build a SBC stroker motor, and you can do a lot to get it to 400 HP, and get torque too. New crank, clearance the block, buy a new oil pan, set of rods and pistons, etc. But it's just easier, and less parts to buy to get there with a 454. I can buy a running 454 locally for what a stroker crank will cost me to build a 383 SBC.|
|01-15-2013 06:42 PM|
What is the reason for the 454. I would love to have a 454 big block in my vette but everytime i crunch the numbers a small block is always cheaper.
A 383 will pump out a nasty 400 hp and 100 pounds lighter and half the price. As mich as i like the big rats they are too much money unless your going with a new dart block for racing its not worth The cash for a mild build.
Also if your going to crawl over every junk yard ina hundred mile radius of your house build an LS motor. Lots of good options. The 6.0 truck/escalade motor is a nice choice.
Careful lots of different 454 out there. Some are newer roller style some old and some much older. And not all parts work with all engines. You will need to get your block tear it down and find out what you got before thinking about pistons. Wiki has a pretty good general break down. I think they have 7 generations of engines. Not all are really performance quaility.
But the cores are out there. They came and may still be option in 1 ton and over trucks. Lots of short school buses have 454. Just make sure you know what you want before you go looking. Junk yards will sell you the crappy engines first. A good early 70's core will be at a preimium price but a later roller truck motor is probably better.
|01-15-2013 01:16 PM|
I think you might find it a little difficult to find a good core not already bored at least 0.060" over in a junkyard these days. If you do, expect to pay a premium.
|01-15-2013 11:18 AM|
A little over 9:1,almost any mild .500 lift cam,750 cfm 4 bbl.performer type intake,MUST have headers and big exhaust,balance the engine.
Or follow the same recipe as GMs LS-5 and you will have 360 HP. The torque is huge
|01-15-2013 11:01 AM|
Just to give you an idea of how the dishes/domes work in a BBC:
With 119cc chambers:
18cc D-cup makes 7.4:1 SCR
3cc flat-top makes 8.2:1 SCR
12cc dome makes 9.0:1 SCR
25cc dome makes 10.2:1 SCR
43cc dome makes 12.0:1 SCR
|01-15-2013 08:52 AM|
|01-15-2013 06:32 AM|
|Moose2||Many thanks; that helps. BTW I would use flat-top pistons. What brand of pistons is decent for the 454?|
|01-15-2013 05:00 AM|
Look for a 454 with 781 or 049 heads. I also like 820 heads from a early 70's 402 as these heads have 112 cc chambers and a combustion chamber shape that unshrouds the exhaust valve.
|01-15-2013 04:38 AM|
454 performance tweak
I've never worked with a 454 before, and I'm thinking of getting a "basic" rebuildable from a local yard. I assume a garden variety 454 will put out about 300hp, and I'd like to target a mild upgrade to approx 400bhp. I hate to do it "barnyard style" (which is what I usually do) by just throwing a cam in it, boring it out, putting on an aftermarket manifold and a set of headers. Where do I go to get intelligent configuration information that would help me make smart choices to get to 400 hp??? Is there an on-line program that I can find that will let me plug in what I'm starting with and will feed me back decent options?? Anybody? Buehler?