467 Ya or Nay
04-29-2008, 09:37 PM
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What motor helps a bunch. Friend build a 468, it was just a 454 punched out some. World Motors (sponsor) sells a 638ci CBB, but it aint cheap. They also sell 454ci SBC as well.
04-29-2008, 11:27 PM
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Well, I don't see any problem with doing that. I'll check my program and see if the stoke is diff between the 2.
Well the 455 is a tad bigger bore, and a huge stroke change. 3.750 for the 350-400 and 4.120 for the 455.
So I'm not sure what all would need to be done to run a 455 crank. A 400 SBC crank in a 350 SBC needs some block machining so it'll clear when rotating. If no one else replies here, I'd either google it, or call a local shop.
BTW, I dig "THERE ARE NO ATHEISTS AT 180MPH" lol
Well the 455 is a tad bigger bore, and a huge stroke change. 3.750 for the 350-400 and 4.120 for the 455.
So I'm not sure what all would need to be done to run a 455 crank. A 400 SBC crank in a 350 SBC needs some block machining so it'll clear when rotating. If no one else replies here, I'd either google it, or call a local shop.
BTW, I dig "THERE ARE NO ATHEISTS AT 180MPH" lol
04-30-2008, 12:04 PM
#5
Post your question here:
http://forums.performanceyears.com/f...play.php?f=418
You'll get a better, much more "real world" response with Pontiac members that run that motor. FWIW - it's a good choice. Have fun!
http://forums.performanceyears.com/f...play.php?f=418
You'll get a better, much more "real world" response with Pontiac members that run that motor. FWIW - it's a good choice. Have fun!
04-30-2008, 01:03 PM
#7
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Pontiac crank journal diameter changes between 400 and 455 cubic inches. SO, what you want is a stroker crank, not a 455 crank, and theres a lot of them out there made by various companies. Get a whole stroker kit from one of these companies, comes with crank, rod, and pistons... save yourself the guess work there.
Then get a 400 block, and build it up like any other engine. It's pretty easy...
Then get a 400 block, and build it up like any other engine. It's pretty easy...
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04-30-2008, 01:11 PM
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Pontiac crank journal diameter changes between 400 and 455 cubic inches. SO, what you want is a stroker crank, not a 455 crank, and theres a lot of them out there made by various companies. Get a whole stroker kit from one of these companies, comes with crank, rod, and pistons... save yourself the guess work there.
Then get a 400 block, and build it up like any other engine. It's pretty easy...
Then get a 400 block, and build it up like any other engine. It's pretty easy...
04-30-2008, 07:24 PM
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Depending on your horsepower goals you can run a cast 4.25 stroke crank with 400 mains and 2.20 rod journals for about $300 and a forged one will run your about $700. Doing it that way you can run BBC rods which will be better and cheaper, around $460. Most go with a 6.8 rod and a tiny piston. They make great motors and that's what I'm planning on doing to mine.
04-30-2008, 07:53 PM
#11
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Yes I have built a few of them...
Like a few of the posts in this thread have pointed out, it requires picking out the right parts. Since you clearly know about cars, but not this engine, I would strongly suggest a kit that comes with everything you need. I suggest reading up on building Pontiac engines as well ( good books out there on the topic ).
The 455 is deffinetly worth it, but thats in my opinion. A 400, because of its shorter stroke and smaller journal diameter allows for a "revier" engine, but the 455's torque makes it much more fun on the street, allowing you to run more streetable gears, etc...
Like a few of the posts in this thread have pointed out, it requires picking out the right parts. Since you clearly know about cars, but not this engine, I would strongly suggest a kit that comes with everything you need. I suggest reading up on building Pontiac engines as well ( good books out there on the topic ).
The 455 is deffinetly worth it, but thats in my opinion. A 400, because of its shorter stroke and smaller journal diameter allows for a "revier" engine, but the 455's torque makes it much more fun on the street, allowing you to run more streetable gears, etc...