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Old 03-31-2008, 08:33 AM
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help with block an application

hi i have just picked up a block an have another on way, but only have detail's on one for now.

t0403csa 330817

now idealy i'd like to stroke an bore out an run a blower with poss nos but that would be in the future

so to run a stroker with blower what would u guy's say the max bore out would be?

also i think both are only 2 stud mains will these be ok to handle to power not going to be driven everyday just for fun an the odd run down a strip.

any help would be great, i'm a v8 virgin an trying to learn fast with out wasting to much cash.

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Old 03-31-2008, 08:47 AM
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What motor is this?
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Old 03-31-2008, 08:49 AM
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T Tonawanda engine plant
0403 April 3
CSA 1973 400 tur hydro trans. LE2 VIN U 175hp 2BBL B Body
CSA 1976 400 LT4 VIN U 175HP 4BBL A/Bel Air/Kingswd
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Old 03-31-2008, 08:56 AM
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yeah thats all the info i could find on it as well. how do i know if it is a 350 or something else? 175hp seems low to me.
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Old 03-31-2008, 08:56 AM
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Yeah 400 small block with 2 bolt mains. The max bore on this motor should be 4.185. Any more and you will compromise the blocks structural integrity.

If you are going to stroke this motor and put a blower on it you will probably break the block in half the first time you step on the gas.

The 400 SBC is not designed to withstand that kind of abuse. Plus the caps and main cap webbing are not designed to withstand the extra G forces that happen when you increase the stroke of a crankshaft. At the very least it will have to be machined for splayed 4 bolt billet main caps.

If you are going to put that kind of power and money into the motor then you should consider an aftermarket block like a dart little M or sportsman block.
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Old 03-31-2008, 08:59 AM
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Quote:
Originally Posted by Double_v23
Yeah 400 small block with 2 bolt mains. The max bore on this motor should be 4.185. Any more and you will compromise the blocks structural integrity.

If you are going to stroke this motor and put a blower on it you will probably break the block in half the first time you step on the gas.

The 400 SBC is not designed to withstand that kind of abuse. Plus the caps and main cap webbing are not designed to withstand the extra G forces that happen when you increase the stroke of a crankshaft. At the very least it will have to be machined for splayed 4 bolt billet main caps.

If you are going to put that kind of power and money into the motor then you should consider an aftermarket block like a dart little M or sportsman block.


ah right so it is a 400 an it's been .30 over bored i think he said, so could i run this with out a blower an nos an still reach good power?

how much is an aftermarket block gonna cost bearing in mind i'm in the uk an it'd have to be shipped lol
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Old 03-31-2008, 09:59 AM
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A good aftermarket block will be 2500-3000 (US). I am not sure on international shipping.

Without the blower and stroking you can still make good power with these motors. Also you will need to get 4.195 pistons and have the block bored and honed if you want to use new pistons. But this shouldn't be a problem as long as you are not supercharging it.

There are plenty of guys who build these to 450-500 HP. But in my experience this does not contribute to longevity. If you want a solid, reliable 400 using the block you have then you will want to stay below 450 Hp and 6000 RPM
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Old 03-31-2008, 10:10 AM
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spot on thanks for the info i will see what this other block is an then see which is going to be the better way to go or maybe a crate engine. cheers bud.
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Old 03-31-2008, 03:08 PM
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ok the other block plus bit's is v1228cjd 11c117511

which means it's a 71 '350 from the two which would give better more reliable high power?
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