318/390 Stroker
01-07-2007 | 04:35 PM
#1
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318/390 Stroker
I have a 72 Dart with a 318. Im looking for a good small block project to get some serious power. I was looking at two choices: 360/426 stroker from a block in my shed, or 318/390 from the motor in my car. the 360/426 is going to be a pricey endeavor so I was looking for info on the 318/390 project. Does anything need to be done to the block (notching, etc.)? Can any stock bottom end parts be used? Does anyone know where to find a cheap kit? Im going for a sleeper with this project.
The motor currently has 340 heads, performer rpm intake, 650 cfm Edel carb, and mopar nostalgic cam with .484 lift and .284 duration (advertised). I don't know anything about the bottom end or the numbers on the heads because this is how the motor came when I bought this car.
Ideally, If I went with the 318/390, I'd like to be able to use the parts I have now. Will the 340 heads flow enough? And would a different cam be better? Im looking for 400+ hp with good torque. Thanks for all yalls input.
The motor currently has 340 heads, performer rpm intake, 650 cfm Edel carb, and mopar nostalgic cam with .484 lift and .284 duration (advertised). I don't know anything about the bottom end or the numbers on the heads because this is how the motor came when I bought this car.
Ideally, If I went with the 318/390, I'd like to be able to use the parts I have now. Will the 340 heads flow enough? And would a different cam be better? Im looking for 400+ hp with good torque. Thanks for all yalls input.
01-30-2007 | 12:06 PM
#4
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Joined: May 2006
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unless youre set on a stroker, you dont need it if youre only shooting for 400rwhp. im running a .030 over 340 with 9 to 1 compression, small valve heads, good intake and carb...headers...and im making around 380 rwhp. that is with ported stock 360 iron heads, 1.88 intake 1.60 exhaust valves...528 cam, 1 5/8 headers. 3700lb car running 12.40s...imagine if i had a set of edelbrock heads, 2.02/1.60, same cam, high compression pistons, etc...there is no doubt that i would easily pick up 20 more rwhp. i think that the heads alone would do that...no need for a big stroker.
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ThomasNieman710 (07-02-2013)
01-31-2007 | 07:20 PM
#5
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stroker
engine masters magazine winter 2006 features a 318 build-up that claims 415 peak horsepower (dyno). the build is by steve dulcich who doesn't need any introduction. the engine uses 318 block, crank and 360 heads (for the 1.88 1.60 valves). if you can't find this mag at your local store, check out phr online. if you can't find it, post back and i'll give you some details. it's not a real expensive engine, just some good hypereutetic pistons, hydraulic cam and intake. there is not a lot of expensive machine work involved (beyond the usual). strokers are cool, but not cheap.
03-30-2010 | 05:15 AM
#7
Junior Member
Joined: Mar 2010
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318 Pistons Dodge Plymouth Chrysler Mopar 318 5.2L Magnum 390 Stroker Piston Sets
The 318 Mopar V8, also known as the 5.2L, and 5.2 Magnum has been around since 1964 as part of the LA engine series and the 1992 and newer Magnum series. We offer a wide range of pistons for the Mopar 318 engines. The 318 is a dependable, reasonably small and light, efficient engine package, that can be built to do everything from power a street work truck to being an all out drag, oval track or road racing engine. Many people tend to overlook the 318 as a high performance engine, which is a shame as it offers many benefits, and the core engines are easy to come by and relatively inexpensive.
The 318 Mopar V8, also known as the 5.2L, and 5.2 Magnum has been around since 1964 as part of the LA engine series and the 1992 and newer Magnum series. We offer a wide range of pistons for the Mopar 318 engines. The 318 is a dependable, reasonably small and light, efficient engine package, that can be built to do everything from power a street work truck to being an all out drag, oval track or road racing engine. Many people tend to overlook the 318 as a high performance engine, which is a shame as it offers many benefits, and the core engines are easy to come by and relatively inexpensive.
In building up a 318, one of the main things that must be changed is the pistons. From the factory, the 318 was just about always equipped with low compression pistons, as it was intended more for long life, using low octane regular gasoline, than for high power output. Installing higher compression, higher quality pistons is one of the biggest improvements you can make to your 318 engine. A stroker crankshaft is another item that really brings the 318 to life as it greatly increases torque and power. The 4 inch stroker crank builds a .030 oversize 318 into a 390 and the increase in performance is dramatic.
We offer a wide range of replacement pistons for the Dodge, Chrysler, Plymouth 318 engines. We have everything from stock replacement pistons, to custom 318 forged racing pistons, stroker pistons and quite a bit in between. The 318 and 5.2L Magnum piston listings on this page include high performance and racing forged pistons at the top of the page, and stock type replacements at the bottom of the page.
03-30-2010 | 05:53 PM
#10
A.K.A Bob Dodge
Joined: Mar 2010
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From: couer d' alene id.
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