inputs on stock bottem end 351w. - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 9 Old 08-24-2010, 11:02 PM Thread Starter
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inputs on stock bottem end 351w.

I have a 351w fuel injected out of a 1989 ford e150 van. this is the first of two that i will use. this one i plan on throwing in and using for now while the second gets built. aside from the obvious like changing my hotside, intake, distributor and pan, will the factory bottem end be fine under boost? and will stock pistons clear 2.02 valves. cam will only be around .512 lift. if i missed anything please let me know.


1993 GT 357W T76
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post #2 of 9 Old 08-25-2010, 08:43 AM
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Are they both 89 motors?I think the valve will clear,but i wouldnt take anyones word check the PTV clearence.Use the tootsie roll trick it's cheap and inexpensive.The 351 are good for around 700.

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post #3 of 9 Old 08-25-2010, 11:13 AM Thread Starter
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No, one is a 89 and the other is a 72. I'm just gonna swap my heads over to the 89 and put it on 10lbs for now

1993 GT 357W T76
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post #4 of 9 Old 08-25-2010, 11:30 AM
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older block's are stronger.. i would hope that is the one you are building!

casting numbers starting with c9 and d0

the later blocks are not much stronger then the 5.0 blocks
and e7 heads wont just fit. the 351w use's 1/2 heads bolts vs the smaller 5.0 bolts. best bet is to have the head bolt holes drilled out.. but atleast try to find some gt40 heads from a truck. e7 barely move enough air for a 5.0, let alone 5.0 extra cubes

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post #5 of 9 Old 08-25-2010, 12:45 PM
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Quote:
Originally Posted by Gearhead559 View Post
older block's are stronger.. i would hope that is the one you are building!

casting numbers starting with c9 and d0

the later blocks are not much stronger then the 5.0 blocks
and e7 heads wont just fit. the 351w use's 1/2 heads bolts vs the smaller 5.0 bolts. best bet is to have the head bolt holes drilled out.. but atleast try to find some gt40 heads from a truck. e7 barely move enough air for a 5.0, let alone 5.0 extra cubes
Everything I've ever heard was the 351 is a good deal better than the 5.0. I would rather run a 351 at 500hp all day than a 302 at that level.
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post #6 of 9 Old 08-25-2010, 01:04 PM Thread Starter
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I'm not using E7 heads, there vic jr's. they have 1/2 bolt holes already. For the intake I'm going to keep my pro products typhoon and just get. 351w lower. I just want to see if anyone has used a a351w bottem end before with any issues.

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post #7 of 9 Old 08-26-2010, 06:36 AM
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I'm not using E7 heads, there vic jr's. they have 1/2 bolt holes already. For the intake I'm going to keep my pro products typhoon and just get. 351w lower. I just want to see if anyone has used a a351w bottem end before with any issues.
There's a thread on here somewhere with several folks saying they are running stock motors with hypers and no issues. The general concensus is you should keep boost low, somewhere around 10lbs or so.
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post #8 of 9 Old 09-16-2010, 07:43 PM
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Quote:
Originally Posted by Gearhead559 View Post
older block's are stronger.. i would hope that is the one you are building!

casting numbers starting with c9 and d0

the later blocks are not much stronger then the 5.0 blocks
and e7 heads wont just fit. the 351w use's 1/2 heads bolts vs the smaller 5.0 bolts. best bet is to have the head bolt holes drilled out.. but atleast try to find some gt40 heads from a truck. e7 barely move enough air for a 5.0, let alone 5.0 extra cubes
There have been many "newer roller" blocked 351's make 800+rwhp. The 351 block no matter what year is a lot stronger than a 302. If your going to lean on it you should look at getting some pistons and rods.
Here is a link to one of them.
http://www.theturboforums.com/smf/in...?topic=84871.0
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post #9 of 9 Old 09-17-2010, 02:53 PM
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Everyone keeps saying its good to 700hp, but they don't read that he is retaining the stock bottom end.

So, you prolly want to keep it at about 10lbs.

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