opinions on this Internal Combo

Black331Stang said:

im all set for my stroker but i was just wondering what some of your opinions would be on some of my questions. this will be on a 347 or 331 stroker. im leaning towards a 331.

1st off....heres what im looking for....Good Driveability, 375-400 RWHP, MAYBE some nitrous 100 shot at most..and rarely.....street drieven with occasional track use...probably only 5 times a season.

-ok now would i be ok with a Cast Steel crank or should i go Forged??


Cast cranks will outlast stock blocks...


-what is better/the major differences/what would suit my needs...H beam or I beam rods?


I-beam rods are lighter and will also outlast the stock block.


-one set of rods says 5140 forged I beam and teh other 4340 forged H beam...im thinking teh 4340 is alot better


4340 is a better material. Scat is one of the few companies that offer a 4340 budget I-beam rod for your configuration.


-does a 1 piece billet steel main support sound good?

-anyone ever hear of the brand KAT for internals? i dunno if it was just a mistype mean SCAT ....that was listed on a shortblock


NO! It's not a typo and yes, we have heard of them and usually run away from it. They simply don't have the quality that Scat and Eagle have. do your research and you'll find the truth...


-not into far detail but would u guys go with 331/347...i dont think the tradeoffs are worth it for a 347...less life, chance of burning oil on startup, only an average 25 Hp differnce


Any oil burning rumor is simply that, a rumor. Talk to the people who have actually run them, they don't burn oil when they're properly machined and assembled.


-and finally,this will be on a brand new Ford Block. With the block hold this motor even with the 100 shot of nitrous? assuming im making 400RWHP? and ive head sportsman hold up to 650..is this accurate?


Any 2 bolt block is questionable after 500rwhp. I'd say you'll probably be ok with a mild NA setup and a small shot of NOS but as before, 500+ and you're starting to gamble.



thanks in advance for any help.

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