Decent street strip 460 - 460 Ford Forum
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post #1 of 9 (permalink) Old 04-20-2017, 08:49 PM Thread Starter
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Decent street strip 460

Hi guys
Wanted to get your thoughts on the combination I'm planning.Its a .03 over 460 kb138 pistons, Sir rods, ex284h cam tfs290 heads stealth intake. With.040 head gasket .005 below deck should be around 9.8 compression. Its going in a 1970 fairlane with 3.89 gears and a 2500 converter. It will be street strip driven with 93 octane. I am also considering worked heads from RHP, but I haven't heard back from Scotty yet. Anyone see cost effective room for improvement?
Thanks
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post #2 of 9 (permalink) Old 04-20-2017, 09:32 PM
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Use forged pistons.
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post #3 of 9 (permalink) Old 04-20-2017, 10:08 PM
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Cool

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Originally Posted by thomcat View Post
Hi guys
Wanted to get your thoughts on the combination I'm planning.Its a .03 over 460 kb138 pistons, Sir rods, ex284h cam tfs290 heads stealth intake. With.040 head gasket .005 below deck should be around 9.8 compression. Its going in a 1970 fairlane with 3.89 gears and a 2500 converter. It will be street strip driven with 93 octane. I am also considering worked heads from RHP, but I haven't heard back from Scotty yet. Anyone see cost effective room for improvement?
Thanks
Tom,

Sorry for the oversite on returning your call. I'm buried.
I will call tomorrow.





S

Scotty J. "AKA" The "Mad Porter"
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post #4 of 9 (permalink) Old 04-21-2017, 11:41 AM Thread Starter
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Wouldnt I be farther ahead in running the tighter tolerences of the KB pistons as opposed to forged? Gives me a tighter quench.
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post #5 of 9 (permalink) Old 04-21-2017, 11:50 AM
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Cool

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Wouldnt I be farther ahead in running the tighter tolerences of the KB pistons as opposed to forged? Gives me a tighter quench.

You are confusing piston to wall clearance with quench clearance.



S

Scotty J. "AKA" The "Mad Porter"
"EMC 2006" 3rd place finisher
Ported BBF iron head specialist & Aluminum heads from all sources.
Custom ground cams
See our products in the Vendor for sale section
Customized crate engines
http://R-H-P.biz

"ReinCarNation High Performance" (253)-988-6648


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post #6 of 9 (permalink) Old 04-21-2017, 01:28 PM Thread Starter
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What I meant was that closer cylinder to bore clearance reduces piston rock and therefor allows you to safely run tighter piston to head clearance. If I'm wrong let me know
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post #7 of 9 (permalink) Old 04-21-2017, 01:28 PM Thread Starter
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Piston to bore, mybad
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post #8 of 9 (permalink) Old 04-21-2017, 04:15 PM
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Why spend all the money on a build and have it's longevity hinging on hyper pistons?
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post #9 of 9 (permalink) Old 04-21-2017, 05:12 PM
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Cool

We have used hyper pistons in our crate engines for years at the 500 hp / 5,200 rpm peak and under combinations with 0 trouble. Setting the top ring gap is essential on ANY hyper piston even the sealed power units.

Is a forged piston better in a mild application? Only if you plan on spraying it with nox or detonating it to death.

Each has its place.




S

Scotty J. "AKA" The "Mad Porter"
"EMC 2006" 3rd place finisher
Ported BBF iron head specialist & Aluminum heads from all sources.
Custom ground cams
See our products in the Vendor for sale section
Customized crate engines
http://R-H-P.biz

"ReinCarNation High Performance" (253)-988-6648


http://www.facebook.com/SMJRHP#!/SMJRHP

Last edited by The Mad Porter; 04-21-2017 at 05:21 PM.
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