LT1-LT4 Modifications 1993-97 Gen II Small Block V8

7/16 cap screw I beams with a 383?

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Old 01-09-2010, 01:10 AM
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Default 7/16 cap screw I beams with a 383?

Just wondering whos running this and what your thoughts were. Im possible changing directions on my build and was going to run a 6" I beam rod with 7/16 cap screws.

Also wondering what splayed main caps people are running? Im might just stay 2 bolt with arp main studs and will be running a forged crank eagle, scat, or compstar depending on the funds.
Old 01-09-2010, 08:55 AM
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Originally Posted by 355z28
Just wondering whos running this and what your thoughts were. Im possible changing directions on my build and was going to run a 6" I beam rod with 7/16 cap screws.

Also wondering what splayed main caps people are running? Im might just stay 2 bolt with arp main studs and will be running a forged crank eagle, scat, or compstar depending on the funds.
Put the money that you'd spend on splaying the mains into something else. A Compstar crank would be a decent investment.

6" rod all the way!
Old 01-09-2010, 09:56 AM
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Is yours a 2 bolt main? would you feel comfortable spraying it? what size cap screw are your rods?

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Old 01-09-2010, 10:26 AM
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Originally Posted by 355z28
Is yours a 2 bolt main? would you feel comfortable spraying it? what size cap screw are your rods?
I have a factory 4-bolt block on mine with 7/16" bolts, Scat forged I-beams. I only went with the 4-bolt because I got it at a good price, but wouldn't hesitate to use a 2-bolt, even with a shot of nitrous.
Old 01-09-2010, 10:38 AM
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Personally if you are going to the trouble of building a stroker motor, I would do 4 bolt mains.... especially if you intend to spray it a little. I have seen evidence of main cap movement on motors in the 550 flywheel hp range. This is not hard to achieve with a small shot of juice.

As for the original question of rods, there is an extreme spread of quality in rods, all available with 7/16" bolts. Be sure to get a stroker series of rod that offers more bolt to oil pan rail clearance so you have less chance of grinding into the water jackets when you clearance the block.

My suggestion is to spend a little more now so you do not wish you had a stronger motor later. From experience, most people do not stop improving their cars.... meaning it will evolve further in the future. I have customers that skimp on their first build (against my recommendation), only to come back & buy the same parts (of better quality) all over again a year or 2 later.



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