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post #1 of 11 Old 08-19-2009, 11:33 PM Thread Starter
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Building 4.6 question?

How much would it cost me to build the bottomend and refresh just the top. I just want the bottomend to be very strong, so that I can throw the boost to it.

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post #2 of 11 Old 08-20-2009, 01:25 AM
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Originally Posted by nbatchler View Post
How much would it cost me to build the bottomend and refresh just the top. I just want the bottomend to be very strong, so that I can throw the boost to it.
MMR 900 for about 3k when you done. 900hp should be enough for you ?????


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post #3 of 11 Old 08-20-2009, 11:17 AM
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MMR short blocks are definitely the cheapest and easiest route to go.
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post #4 of 11 Old 08-20-2009, 04:33 PM
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MMR will be the easiest. I got really lucky and pieced together a stroker rotating assembly for $1300. (Kellogg crank, probe pistons, and manley h-beam rods) After machine work and balancing I should have under $2k in my shortblock that will handle 750-800hp. Everything adds up quick. If you want to build it yourself, MMR has some nice rotating assemblies at good prices.

But before all this you need to figure out your horsepower goal, and how your gonna get there. ie.. how much max boost, what compression ratio, what it's going to require for fuel and tuning, what cams (if you need to notch pistons), think about everything before you start spending money. You dont want to buy parts that will only get you so far, and then have to spend extra to make it to your goal.

hope this helps.

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post #5 of 11 Old 08-20-2009, 05:24 PM Thread Starter
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I just dont know how much longer my motor is going to last with the turbo on it.
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post #6 of 11 Old 08-20-2009, 05:38 PM
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Im in the process of building my 4.6 aswell. I am using 03 cobra rods and pistons and im goin to have my stock crank balanced if i cant find a forged one in good condition. I will be puttin a turbo on my car as well but dont plan on makin much more than 600 so i should be good with what im using. After all said and done with main and head studs, notched pistons and all the machine work i will be under 1500.
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post #7 of 11 Old 08-20-2009, 09:06 PM Thread Starter
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so if I did just build the bottom end, could I get 600rwhp?
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post #8 of 11 Old 08-20-2009, 09:58 PM Thread Starter
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Originally Posted by sid_02gt View Post
MMR will be the easiest. I got really lucky and pieced together a stroker rotating assembly for $1300. (Kellogg crank, probe pistons, and manley h-beam rods) After machine work and balancing I should have under $2k in my shortblock that will handle 750-800hp. Everything adds up quick. If you want to build it yourself, MMR has some nice rotating assemblies at good prices.

But before all this you need to figure out your horsepower goal, and how your gonna get there. ie.. how much max boost, what compression ratio, what it's going to require for fuel and tuning, what cams (if you need to notch pistons), think about everything before you start spending money. You dont want to buy parts that will only get you so far, and then have to spend extra to make it to your goal.

hope this helps.

Sid

Do u think I could just get rods and pistons from a cobra for a reasonable price and just install them in my car. Because them cobras will handle 600rwhp all day long. I just wish I knew where to get the rods and pistons, bearings to make this happen.
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post #9 of 11 Old 08-20-2009, 10:32 PM
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http://www.modularmustangracing.com/

Those guys have everything you need...I wouldn't mess with trying to find Cobra parts. Plus your gonna want to bore the block .20 over to get a the best seal possible for the new rings. Especially with boost! Which means stock size Cobra pistons will be useless.

BTW...which K member are you running with your turbo kit?

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post #10 of 11 Old 08-20-2009, 11:12 PM
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I don't know if i would go with all the cobra stuff. I think the pistons would get you too high of a compression ratio for your turbo set up. The rods and crank should work fine. Do some searches on ebay. I paid $175 for my probe piston brand new in the box. And $290 for manley H-beam rods new in the box. I would at least go with a cobra crank over the stock 6-bolt.


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post #11 of 11 Old 08-20-2009, 11:59 PM Thread Starter
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What come in the 03-04 Cobra Mustang far as Pistons and rods?
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