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Old 07-26-2009   #1 (permalink)
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Default 331 Stroker VS 347 Stroker

So since I have been a member here at AFM. I have seen several posts of people asking questions about the 331 VS. the 347. I just seen a new one recently. So I was Thinking that if someone on this site, possibly a Moderator with some experiance on Stroker motors could start a sticky Thread about the Pros and Cons of each one. The HP differances of each and so on and so on.

Do you guys know of anyone that could do this??
I was thinking of and older experianced gentleman on the lower East Coast, that claims to have "a little of this & a little of that" done to his car would be interested in taking up such a project????

Just an Idea I had Reggie.
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Old 07-26-2009   #2 (permalink)
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Quote:
Originally Posted by 76Ford90LX View Post
So since I have been a member here at AFM. I have seen several posts of people asking questions about the 331 VS. the 347. I just seen a new one recently. So I was Thinking that if someone on this site, possibly a Moderator with some experiance on Stroker motors could start a sticky Thread about the Pros and Cons of each one. The HP differances of each and so on and so on.

Do you guys know of anyone that could do this??
I was thinking of and older experianced gentleman on the lower East Coast, that claims to have "a little of this & a little of that" done to his car would be interested in taking up such a project????

Just an Idea I had Reggie.
You talking to me.......

That is a excellent idea.....

it will just be a matter of complining the info & putting it together

so if you guys see any interesting article or have any first hand info......

please submitted it to this thread .......

once we have enough it can become a sticky.......

also submit any question you want answered on the subject and those will also be adressed.....

BTW who you calling old young'un......
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Last edited by RLG34750; 07-26-2009 at 04:06 PM.
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Old 07-26-2009   #3 (permalink)
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Definitely, add to this thread. We get this question so many times it'd be good to get everything together.
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Old 07-26-2009   #4 (permalink)
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Wow Reg, I thought you were going to get mad that I called you a "Gentleman" I didnt think the "older" comment would offend you

Also It comes up often

"should I stroke my engine to a 347 or just get a 351 instead, what one is stronger, cheaper, Blah-blah.."

There is a myth that seems to always come up that the 347 is weak and that a 331 is more reliable. I think 331 guys started it becuase to be honest I think 8 out of 10 strokers out there are 347's If the 347 is more of a time bomb then why do guys keep building them, you 331 guys ever think about that.

What we need is some input from someone that has built both AND driven them for a decent amount of time to know the ins and outs of each one.
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Old 07-26-2009   #5 (permalink)
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built two 347s in the last few months, customers both love them. no problems.
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Old 07-26-2009   #6 (permalink)
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Yes this is probally a good idea since people dont know how to search for threads before they go and post the same one...
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Old 07-26-2009   #7 (permalink)
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Quote:
Originally Posted by GeorgiaLX View Post
Yes this is probally a good idea since people dont know how to search for threads before they go and post the same one...
So true, The bad thing is that those are the same people that dont even read the sticky threads. Also the ones that ask how to perform a tune-up when there is a full article on that in the Tech section. But hey once they ask we just point them there instead of typing it all over again.
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Old 07-27-2009   #8 (permalink)
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Quote:
Originally Posted by 76Ford90LX View Post
Wow Reg, I thought you were going to get mad that I called you a "Gentleman" I didnt think the "older" comment would offend you

Also It comes up often

"should I stroke my engine to a 347 or just get a 351 instead, what one is stronger, cheaper, Blah-blah.."

There is a myth that seems to always come up that the 347 is weak and that a 331 is more reliable. I think 331 guys started it becuase to be honest I think 8 out of 10 strokers out there are 347's If the 347 is more of a time bomb then why do guys keep building them, you 331 guys ever think about that.

What we need is some input from someone that has built both AND driven them for a decent amount of time to know the ins and outs of each one.

You are right about the gentleman part.......

it was a shocker ......

I don't remember the last time someone called me one of those.....


Quote:
Originally Posted by cindys_sn95 View Post
built two 347s in the last few months, customers both love them. no problems.

Thats good to hear i expect lots of input from you in this thread....
Ok guys bring on the questions......
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10.39 @128 MPH Soon to be faster....
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Old 07-27-2009   #9 (permalink)
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I wanna make 1,500 HP can a 347 get me there?

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Old 07-28-2009   #10 (permalink)
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Very good idea posting such thread, I am planning to get new stroker and top end kit, my engine block is stock ford 302 SN-95 and as far as I know this is my limitation and this is one of the most important factor people have to consider when getting a stroker kit.
Doing some search I find out that the maximum I can go with the stock block is between 450-500 hp and this will be my target.

331 stroker with trick flow top end kit and vortech s/c 8-10 PSI will be a good setup to reach that point??

Getting 347 with s/c will twist and break my block??

And what about stud girdle??
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Old 07-28-2009   #11 (permalink)
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Quote:
Originally Posted by 76Ford90LX View Post
I wanna make 1,500 HP can a 347 get me there?

Yes i can be done ......

I hope you have very deep pockets......

Quote:
Originally Posted by abud_1999 View Post
Very good idea posting such thread, I am planning to get new stroker and top end kit, my engine block is stock ford 302 SN-95 and as far as I know this is my limitation and this is one of the most important factor people have to consider when getting a stroker kit.
Doing some search I find out that the maximum I can go with the stock block is between 450-500 hp and this will be my target.

331 stroker with trick flow top end kit and vortech s/c 8-10 PSI will be a good setup to reach that point??

Getting 347 with s/c will twist and break my block??

And what about stud girdle??
the cubic inches is irrelevant......

It will still be a stock block build the same horsepower limitations will be in place.......

with regard to stud girdles JMO is a waste of money....

the majority of your block failure occurs in the lifter valley

this info applies to stock block applications......
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'88 LX Hatch With A Little Of This & A Little Of That......
10.39 @128 MPH Soon to be faster....
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Old 07-28-2009   #12 (permalink)
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Thanx reggie, it’s the first time I heard about lifter failure, do you have any pic showing the damage, and how to avoid that.

What about the maximum horse power can be reach with my setup???
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Old 07-28-2009   #13 (permalink)
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Quote:
Originally Posted by abud_1999 View Post
Thanx reggie, it’s the first time I heard about lifter failure, do you have any pic showing the damage, and how to avoid that.

What about the maximum horse power can be reach with my setup???

on a stock block 500-550 is generally the max they will support....


The two ways to truely avoid it keep the horsepower within the acceptable range or go with an aftermarket block.....

SBF the weak point is in the lifter valley see pic below....
Attached Thumbnails
331-stroker-vs-347-stroker-big-crack.jpg  
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PERIOD.......

'88 LX Hatch With A Little Of This & A Little Of That......
10.39 @128 MPH Soon to be faster....
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Old 07-28-2009   #14 (permalink)
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I think I know the answers to these, but I'll let the pro answer so they're immortalized:

How much of a concern is rod/stroke ratio, and what are its effects? What about skirt?

Does it matter if the oil ring intersects the wrist pin?

What's the point of a center pin piston?

How does installing a stroker kit change your max safe rev?

Are there any sizes that can reuse stock components (like how a 393 reuses the stock 351 length)?

What's the HP/TQ result of stroking? Is it true that stroking tends to give more TQ than HP?

If I want to add a blower and desire low compression, what options do I have?

That's all I can think of off the top of my head. I figure these would be good things to have in this thread.
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