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Discussion Starter #1
I just took apart the engine yesterday and found a spun bearing on rod # seven. At this point I have several choices and I just want to get some advice.
First, would you guys go with a stroker kit or just forged internal?
Can the aluminum block be bored out to 20 over without changing the cylinder sleeves?
If I decide not to go with the stroker kit, will the stock crank of a 98 cobra handle a 400-500 hp range?
Thanks
 

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whats your power goals?
n/a or f/i?
yes can be 20over just fine if your walls arent destroyed
wouldnt worry about a stroker just get some rods and pistions and celvite bearings and do what you gotta do..
stock crank can prettty much handle whatever you plan on doing with it..
 

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MM's Orangest
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whats your power goals?
n/a or f/i?
yes can be 20over just fine if your walls arent destroyed
wouldnt worry about a stroker just get some rods and pistions and celvite bearings and do what you gotta do..
stock crank can prettty much handle whatever you plan on doing with it..
+1
 

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Discussion Starter #4
I'd like to be in the 400-500 range
n/a for now, next year going f/i for sure
I'm also getting long tube headers.
Should I do something to the heads? port and polish? cams? What would be a good investment?
 

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your not going being around 400-500 n/a and then go fi..because you will need some nice compression to be at that goal...just forged it have compression around 9:5:1, ported heads and be all ready for boost when you ready...of if you have a good tuner put the compression around 10:1...

get some c heads or just have yours ported..do some blower cams if your pockets allow you(they are expensive for 4v)..you looking to buy a preassembled shortblock or have urs built..if you dont have a good machine shop over there i would get a pre assembled one...
 

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Discussion Starter #6
well there's a hole lot of machine shops, i'm trying to figure out which one is the best.
i'm going to rebuild it i want to reuse the aluminum block.
i want to make 400-500 hp f/i, i know that naturally aspirated I will pretty much make the same as the stock motor.
the crank has to be machined, will it loose a lot of strength or is it still good for what i plan to do?
 

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Because Racecar
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You can make more power than stock NA, but you're going to be closing yourself off to a lot of FI applications down the road. If you're going FI eventually then stick with what 02gt said. Not only that, but it'd be better to be patient and just build it for FI, because you'll love the torque curve a lot more than NA.
 

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Does not matter if you are going to go FI you still need to build the best short block you can. The better the base the more you will get with the blower. There is a book out by Richard Holdener “Building 4.6/5.4L Ford Horsepower on the Dyno. Buy the book it will answer all your questions with facts backed up with unbiased engine Dyno charts. It gives charts with different cams, as well as different centerlines, what higher compression ratios do and a bunch more stuff. He did 2v, 3v & 4v motors. In short lower compression for a roots type blower and a bit higher for the centrifugal type. Another book “how to build Max-Performance 4.6-liter by Sean Hyland explains the different heads and why one is better than the other, it also give a very nice write up on how to degree the 4V. Both books refer to John Mihovetz. The book by Richard had John setting up the cams.
Cheers
 

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I just took apart the engine yesterday and found a spun bearing on rod # seven. At this point I have several choices and I just want to get some advice.
First, would you guys go with a stroker kit or just forged internal?
Can the aluminum block be bored out to 20 over without changing the cylinder sleeves?
If I decide not to go with the stroker kit, will the stock crank of a 98 cobra handle a 400-500 hp range?
Thanks
A .020" over stroker with an 11:1CR, a short runner intake, cleaned up B heads, and Comp 106400s installed at 108/114 will be very cloe to 400rwhp. A stock stroke with similar mods will be around 375rwhp.

B heads produce little tq so a stroker is a great.
 

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Because Racecar
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Na SVT is my hero. I wish I could remember everything he says then I would be able to have a proper conversation with other 4v owners...
 

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Prepare for Boooooooooooooost with forged internals.
 

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I would do forged internals no matter what, It is the basis for the rest of your plans. It all comes down to forgeing the motor at some point or another, you either pay now or down the road.
 

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Discussion Starter #15
I think I'm gonna buy a short block, it's cheaper and it comes with all forged internals and a warranty. How much you guys think I can get for my aluminum block?
 

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Because Racecar
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Not much. I'll take it off your hands...
 

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Find them on Craigslist for around 300 bucks
 

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You can get $300 for a 93-99 Teksid block and $300 for the stock cobra crank.
What year stock Cobra Cranks are good? are they forged and if they are good what power range are they good too? Sorry I am very new to the ford game. If it was a LSX block or LTX I could lay out the info pretty straight forward. Just trying to learn :)
 
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