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Unread 03-19-2010   #1 (permalink)
87Gtstang is offline Rookie

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Default 302 to 347 stroker kit questions

I have a basically stock 87 mustang 5 spd was thinking about doing a 351 swap but I kinda wanted to keep the same 302 block, I'm getting gears first but after that I was thinking about getting the 347 stroker kit but I wanted to know more about it, what all do i need to do it? do I need a new computer with it? tuned after its done? any other things I have to change when I do it? is it worth it? where can I find a cheapish kit thats still a good kit etc, pretty much I'd like to know anything you guys know about it, thanks
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Unread 03-19-2010   #2 (permalink)
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well first block will need to be machined .030 pistons. then cut for rod clearance. 30lb injectors 30lb mass air 70mmtb. big runner intake holly or trickflow and nice flowing heads afr or trick flow and a matching cam

dont go cheap it will only hurt you in the long run. scat crank and rods and probe pistons are reasnable and strong

you can use stock computer. i would get a tune to run proper if not run like ****

i think DSS makes a good kit i would get forged bottom end its safe insurance.

for about 5-6 thousand about 400-460 rwhp is that worth it to you?
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Unread 03-19-2010   #3 (permalink)
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Sounds like a lot of work for 10% more displacement. Unless your block is extremely tired I would just go for heads, cam, intake manifold and call it a day, Then add a supercharger if necessary.
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Unread 03-19-2010   #4 (permalink)
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Yeah I wasnt really looking to spend a whole lot of money but I saw 347 stroker kits for like 800 dollars and I was like i could probably afford that but I didn't know what all I had to do to make everything work
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Unread 03-19-2010   #5 (permalink)
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with heads cam intake and a supercharger your about the same hp for the the same amount of money. its all about how much your budget will allow you to spend.
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1991 hatch 347 forged bottom end.
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2002 blazer-sold 1998 mustang gt-sold 2004 silverado-Trade-in 1991 mustang-trailer queen. 2008 Chevy 2500 ltz duramax
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Unread 03-19-2010   #6 (permalink)
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Quote:
Originally Posted by 87Gtstang View Post
Yeah I wasnt really looking to spend a whole lot of money but I saw 347 stroker kits for like 800 dollars and I was like i could probably afford that but I didn't know what all I had to do to make everything work
true you can buy a stroker kit for 800.....

but all the associated parts & labor will br considerably more......
 
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Unread 03-19-2010   #7 (permalink)
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i doubt a 347 with the factory 302 parts is gonna make much more power. maybe give you some more low end torque. get heads, cam and intake first.
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Unread 03-19-2010   #8 (permalink)
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Those kits for $800 are not balanced, you'd wind up paying around $300 to get it balanced and it'd equal out to the better kits for $1000-$1200 but take longer time to get it back from the machine shop. Don't let price always be your deciding factor. If you can't afford what you really want, wait till you can get it.

The block would be bored .030 over and then the cylinder skirts would have to be notched to clear the rods.
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