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Which SBC combo do you think is best?

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Old Feb 16, 2005 | 03:04 PM
  #31 (permalink)  
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Originally Posted by Half Fast
A 6" rod will leave less meat in the piston for the ring pack. With boost or N2O you'd be better off with a 5.85 or 5.7 rod unless you're building a motor to go 150k miles. Go with all forged internals and put the money in the valvetrain if you want high rpms.


all that just depends on the piston used. the oil ring hanging in the pin hole doesn't seem to be a big deal these days....so they still put the rings where they are best for the app ordered. the last ones i messed with were from a dsm and the stock length rods have to have support rings for the oil ring because i was in the pin hole. JE said is was no big deal. and didn't seem to be.


be different and put a 327 crank in a 400 with the rod to match.. lol


but yeah put the money in the valvetrain.
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Old Feb 20, 2005 | 09:01 AM
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Originally Posted by Fordified
For your HP goals, any of the motors listed would work. It really depends on how you like to drive your car? Do you like a high winding motor or do you like alot of torque? What does the car weigh? What gear and tranny will you be using?

Cranks, rods and pistons will all cost the same no matter what motor you get. The 350 block is by far the most common, and better suited than the 400 for street driving.

Well I just picked up a complete 350 out of an 84 suburban for $200. I looked up the block ID numbers and it is a 4 bolt main . So im definitly going with a 350 block. Now to answer your questions fortified.

First off the car is not going to be driven daily. I love torque, but I also would like to turn some more rpm's so the turbo can do its job. Im not to sure what mustang coupes weigh, but im going to say that it will be around 2600 with the sbc motor and some weight reduction ( custom tubular K-member, fiberglass hood, rear seat delete kit, and fiberglass trunck lid). I will be running a built TH400 tranny with a 355 gear. LMK what you guys think. Thanks
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Old Feb 20, 2005 | 09:51 AM
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Thanks man. Yea I know you dont need to rev it, but with a turbo they like a nice wide power band.
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Old Feb 21, 2005 | 04:18 PM
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You should of put a Ford motor in my old coupe.[shakes head slowly].LOL
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Old Feb 21, 2005 | 06:16 PM
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you can punch out a small block to 427ci.
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Old Feb 22, 2005 | 07:06 AM
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Originally Posted by 24-7
you can punch out a small block to 427ci.
Forgive me if I'm wrong, but what combo with a 80's 350 block gives you 427ci? Maybe with a new LS block. I'm gonna have to call bullshit.

With that light of a car and that gear in the back, there's no reason to aim for high torque (any smallblock is going to generate enough torque to make you happy). Go for the high RPM and fast throttle reponse. With that little weight on the car, it's just going to take off like a rocket anyway.

Punch the 4-bolt .030" over and run a 355ci engine. The 3.48" stroke'll lend itself well to high RPM, so twisting 9000rpm shouldn't be a problem. Make sure you've got the money in valve train and heads though.
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Old Feb 22, 2005 | 07:41 AM
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psst....frank

http://www.carcraft.com/howto/1004/
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Old Feb 22, 2005 | 08:32 AM
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Originally Posted by myltwon
According to this article they're running a 4.125" bore and 4" stroke. You just can't do that on a 1980's 4bolt smallblock. .125" over means you're WAY into the water by then.

This guy in the article here says you can use an old 400 block if you got one, but that's a totally different block than an 80's 4bolt that homeboy got his hands on.

Now, too bad I didn't get a 400 block for free instead of this 4 bolt 350 I'm working with. I would've *SO* built a smallblock 427!
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