427 SBC Build Help
04-15-2008, 07:38 PM
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427 SBC Build Help Alright, this is my first time posting on this site, so hopefully everything will go smooth. Anyways, my turning 18 this summer, and starting a build on what i want to be a 427 small block. I have some things in mind, and hopefully will either by right, or could use some guiding.
First, what i want this to be is a streetable, but somewhat wild small block. Im looking for a low compression, possibly blower and/or nitrous later on, and pump gas. Making hopefully 550+ HP.
As of now, i own a 69 camaro with a 350. I'll be taking it out, and replacing it with a Dart aftermarket block bored 4.185 and stroked 3.875. Id imagine id probaly use JE pistons with forged aluminum, and a scat forged aluminum crank. The heads and and cam is where im not positive on where to go. Im thinking AFR 210cc's with a Cam along the lines of 240-250. Any have any better idea's/advice?
First, what i want this to be is a streetable, but somewhat wild small block. Im looking for a low compression, possibly blower and/or nitrous later on, and pump gas. Making hopefully 550+ HP.
As of now, i own a 69 camaro with a 350. I'll be taking it out, and replacing it with a Dart aftermarket block bored 4.185 and stroked 3.875. Id imagine id probaly use JE pistons with forged aluminum, and a scat forged aluminum crank. The heads and and cam is where im not positive on where to go. Im thinking AFR 210cc's with a Cam along the lines of 240-250. Any have any better idea's/advice?
04-16-2008, 09:35 AM
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i agree with the afr 227 runner heads. i had a solid roller 259/267 @ .050 .638/.638 lift cam in my 11:5-11:7 scr 406 that ran great,in a 427 it would have been really sweet.
with those afrs and a cam anywhere near that size you should be able to get 550-600 hp with the right intake also.i used a victor jr but a super victor may have been alittle better.
with those afrs and a cam anywhere near that size you should be able to get 550-600 hp with the right intake also.i used a victor jr but a super victor may have been alittle better.
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04-16-2008, 09:46 AM
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Alright thanks. I was originally thinking the 227's, but were afraid they would be to big. Appreciate the feed back on that As for the low compression, im almost positive i'll go with Dish Pistons. Now any suggestions for the Cam?
04-16-2008, 06:03 PM
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My last other concern is any ever used the 427 SBC by Worlds products. They build a crate motor which i beleive comes with a prepped block. Im looking into it, and also they're short block low compression. Wondering if anyone has any works with either MoTown or World Products?
04-16-2008, 07:55 PM
#11
My last other concern is any ever used the 427 SBC by Worlds products. They build a crate motor which i beleive comes with a prepped block. Im looking into it, and also they're short block low compression. Wondering if anyone has any works with either MoTown or World Products?
04-16-2008, 08:11 PM
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I just finished up a 427 that used a dart block,brodix track 1 cnc ported heads,made 675 hp on pump gas.built a couple of race 427's that made over 800hp.And you will def need a big head to feed that thing.I would not reccomend boring the block to the 4.185 though.The extra cubes arent worth the life you lose from the block,if you keep the 4.125 bore you can still bore the thing several times before it totally worn out.
04-16-2008, 08:32 PM
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What was you're stroke on it? The site recommends only a maximum of 3.875 but ive heard of plenty going to 4.000. The only problem with that is getting the block prepped, and the price of it.
04-16-2008, 08:42 PM
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I just finished up a 427 that used a dart block,brodix track 1 cnc ported heads,made 675 hp on pump gas.built a couple of race 427's that made over 800hp.And you will def need a big head to feed that thing.I would not reccomend boring the block to the 4.185 though.The extra cubes arent worth the life you lose from the block,if you keep the 4.125 bore you can still bore the thing several times before it totally worn out.
04-16-2008, 08:55 PM
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Well, i mean, whats the price difference of a shop. I honestly would like to get the experience of building my own motor too. Also like i said, MoTown makes already built 427 small block.
04-16-2008, 09:13 PM
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4'' stroke 4.125 bore.the problem with going to a 4'' stroke is that you cant go forced induction with it.usually end up with a 1.00'' pistons unless you use a tall deck block.the other things is that you need a small base circle cam.
If your looking a getting a crate engine i strongly suggest not to-not that they are not good engines its just that i size doesnt fit all.for the same money you can get a custom built engine just for you.I like to match everything to what the customer wants.Everything is a factor when building an engine-what your doing with it,what kind of vehicle,weight of vehicle,manual or auto trans,all of this makes a difference in the engine as far as camshaft selection-cyl head size-etc.If you want to build the engine yourself,that fine as well but hook up with a good shop that can help you out with parts selection to get you a good combo of parts-not just a bunch of parts that dont work well together
If your looking a getting a crate engine i strongly suggest not to-not that they are not good engines its just that i size doesnt fit all.for the same money you can get a custom built engine just for you.I like to match everything to what the customer wants.Everything is a factor when building an engine-what your doing with it,what kind of vehicle,weight of vehicle,manual or auto trans,all of this makes a difference in the engine as far as camshaft selection-cyl head size-etc.If you want to build the engine yourself,that fine as well but hook up with a good shop that can help you out with parts selection to get you a good combo of parts-not just a bunch of parts that dont work well together
04-17-2008, 08:21 AM
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4'' stroke 4.125 bore.the problem with going to a 4'' stroke is that you cant go forced induction with it.usually end up with a 1.00'' pistons unless you use a tall deck block.the other things is that you need a small base circle cam.
If your looking a getting a crate engine i strongly suggest not to-not that they are not good engines its just that i size doesnt fit all.for the same money you can get a custom built engine just for you.I like to match everything to what the customer wants.Everything is a factor when building an engine-what your doing with it,what kind of vehicle,weight of vehicle,manual or auto trans,all of this makes a difference in the engine as far as camshaft selection-cyl head size-etc.If you want to build the engine yourself,that fine as well but hook up with a good shop that can help you out with parts selection to get you a good combo of parts-not just a bunch of parts that dont work well together
If your looking a getting a crate engine i strongly suggest not to-not that they are not good engines its just that i size doesnt fit all.for the same money you can get a custom built engine just for you.I like to match everything to what the customer wants.Everything is a factor when building an engine-what your doing with it,what kind of vehicle,weight of vehicle,manual or auto trans,all of this makes a difference in the engine as far as camshaft selection-cyl head size-etc.If you want to build the engine yourself,that fine as well but hook up with a good shop that can help you out with parts selection to get you a good combo of parts-not just a bunch of parts that dont work well together
Very well put. We have seen far to many people spend a small fortune w/mismatched parts & end up w/a mess.
