How much power can this block handle ?

Stangfreak95

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Nov 4, 2002

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Nov 15, 2004

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• Nov 15, 2004

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I could get a 351w out of a 89 Crown Victoria for pretty cheap. How much power can this block handle ?

I always had the project of a 408W Turbo or TT. You think it will handle it ?

Thanks.

 

BlueOvalStangGT

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Oct 27, 2003

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Nov 15, 2004

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• Nov 15, 2004

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Im in the same postion sorta kinda not really. I got a 351 too but I want to throw my blower on it, anyone know?

 

Stangfreak95

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wow..nobody knows this ??

 

Joes95GT

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Keep the horsepower under 600-625 at the crank and keep the revs under 6500. With a good tune it should live.

Joe

 

TT91

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my opinion...keep it under 600 rwhp.

 

M

mustangman33

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Nov 16, 2004

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• Nov 16, 2004

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sirsureshot39 said:

my opinion...keep it under 600 rwhp.

Click to expand...

exactly

 

zenboy99

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Nov 16, 2004

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• Nov 16, 2004

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So its that much stronger then a 302? I heard to keep a stock block 302 under 500rwhp

 

Joes95GT

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#8

• Nov 16, 2004

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zenboy99 said:

So its that much stronger then a 302? I heard to keep a stock block 302 under 500rwhp

Click to expand...

Yep. The old blocks (69-73) can handle some serious power. The newer blocks don't seem like they're so strong. The 351's have much thicker (but still not thick enough) webbing around the mains compared to a 302.

Joe

 

zenboy99

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Nov 16, 2004

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• Nov 16, 2004

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So if I want to build up an NA stroker 351 with close to 500rwhp, I should just go with an old stock block?

 

Joes95GT

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#10

• Nov 16, 2004

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zenboy99 said:

So if I want to build up an NA stroker 351 with close to 500rwhp, I should just go with an old stock block?

Click to expand...

That would be preferable, for your sake. I've seen a 69 W-block go to 750 RWHP @ 7600 RPM or so. The guy was nuts. The last time I saw his car was about 3 months ago when I broke my car at the race track. The motor was still living, too. I wouldn't push something that far unless you are anticipating breaking it. The tune has got to be SPOT-ON for the motor to live.

I believe the good years for 351 blocks are 69-73 or 74. I'll have to ask my old man when I talk to him again....

Joe

 

Stangfreak95

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Man with my project, I'm thinking to have about 800rwhp so I guess I'll have to get a Dart block or something. I was hoping that it could take 700rwhp...

Thanks

 

S

skpm316

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#12

• Nov 16, 2004

• #12

Stangfreak95 said:

Man with my project, I'm thinking to have about 800rwhp so I guess I'll have to get a Dart block or something. I was hoping that it could take 700rwhp...

Thanks

Click to expand...

The DART 351 Iron Eagle block is the only way to go if you want to make serious HP with out worrying if your block will hold up. I purchased one plan on stoking it to 393 or 408 ( have not decided yet ) and I am putting a YSi Vortech supercharger w/ 20lbs of boost on it. Tech guy at DART said their Iron Eagle blocks can handle up to 2000hp, so unless you plan on making more than 2000hp, you will not have to worry about block giving away.