331 or 347 stroker kit - Mustang Evolution

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Old 03-18-2013, 11:47 AM   #1
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331 or 347 stroker kit

Hey I pulled apart my old motor an the block looks to be in good shape. so I'm thinking on putting a stroker kit in it an using my edelbrock heads. iv heard the 347 stroker kit has oiling problems an I'm thinking on running FI. probably only 6 psi or so an have heard that the 331 with FI works good.

Any info would be great thanks
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Old 03-18-2013, 12:12 PM   #2
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The 331 has a better rod to stroke ratio than the 347 which would make it a better choice for a daily driver. As far as forced induction goes i would take it easy with a stock block. 500hp is about the limit of a stock block which wouldnt be too hard to reach with a boosted stroker. I think about 5-6 psi like you mentioned on a 331 would work pretty well aslong as you get a good dyno tune.
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Old 03-18-2013, 02:02 PM   #3
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Originally Posted by keaton5.0
The 331 has a better rod to stroke ratio than the 347 which would make it a better choice for a daily driver. As far as forced induction goes i would take it easy with a stock block. 500hp is about the limit of a stock block which wouldnt be too hard to reach with a boosted stroker. I think about 5-6 psi like you mentioned on a 331 would work pretty well aslong as you get a good dyno tune.
Ye i heard about the rod to stroke ratio is better on the 331 that's why I'm thinking it would be better for boost an just hope the block don't split haha I'm thinking. On getting a 351w so i can put down 550 to 600 rwhp with put splitting the block maybe go with a 408 stroker
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Old 03-18-2013, 03:07 PM   #4
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Anyone think I could put down 400rwhp with a 331 an a good set of h/c/I?
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Old 03-18-2013, 03:28 PM   #5
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Anyone think I could put down 400rwhp with a 331 an a good set of h/c/I?
I bought a motor off a guy with a 331 putting down 352rwhp. Not sure what top end he was running tho.
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Old 03-18-2013, 03:48 PM   #6
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Ye i heard about the rod to stroke ratio is better on the 331 that's why I'm thinking it would be better for boost an just hope the block don't split haha I'm thinking. On getting a 351w so i can put down 550 to 600 rwhp with put splitting the block maybe go with a 408 stroker
If you want over 450 at the wheels, either get a dart or boss 302 block or go 351w
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Old 03-18-2013, 10:11 PM   #7
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If you want over 450 at the wheels, either get a dart or boss 302 block or go 351w
Thanks for chiming in Keaton Kinda out of my realm...
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Old 03-18-2013, 11:01 PM   #8
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Thanks for chiming in Keaton Kinda out of my realm...
Im sort of blowing smoke since im not even close to 450 at the wheels on my car lol, but i know i wouldnt push a stock 302 block past the 500-550fwhp mark
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Old 03-19-2013, 11:34 AM   #9
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Thanks guys probably just going to go with a 351w an I do know all the stock blocks are good for anywhere from 400. Rwhp to 500 iv seen some with a little more then 550 rwhp but it didn't last long my dads old 5.0 had a little over 450 at the wheels on a stock block an it lasted for years but he was probably lucky with that. Haha
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Old 03-20-2013, 07:00 PM   #10
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I cracked my 331 stock block with 100 shot of nitrous, it had a main support also. But cracked right under the cam bores the 2 middles ones, watch out with boost and high power bc it will split a stock block, they say a mexican block is stronger than a US made 302 block but idk im gonna find out, i found a mexican block and gonna redo my 331 just sum fyi
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Old 03-20-2013, 07:07 PM   #11
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I cracked my 331 stock block with 100 shot of nitrous, it had a main support also. But cracked right under the cam bores the 2 middles ones, watch out with boost and high power bc it will split a stock block, they say a mexican block is stronger than a US made 302 block but idk im gonna find out, i found a mexican block and gonna redo my 331 just sum fyi
I wouldnt expect to much more if any out of the mexican block. They are said to have thicker castings. But the weak points arent any stronger. I wouldn't pay any extra or expect much extra holding strength imo.
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Old 03-20-2013, 07:11 PM   #12
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Yeah i get you but i got the block for 100 bucks so just gonna try it lol and gonna take it easy on the gas pedal lol i just wanted sumthin just to get the car back on the road lol
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Old 03-20-2013, 08:10 PM   #13
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Yeah i get you but i got the block for 100 bucks so just gonna try it lol and gonna take it easy on the gas pedal lol i just wanted sumthin just to get the car back on the road lol
You cant beat that. Im just saying dont get hosed lnto paying extra for one.
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