INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

pushrod length????

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Old 02-06-2007, 02:47 PM
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Question pushrod length????

i have a 2007 4.8l rcsb

i would like to get a cam with the specs: 216/220 112LSA +4 .561/.564. also i want a thinner head gasket of .42 rather than the stock .52. what size push rods would i need? or is this something im going to have to check when i have it assembled in the truck.
Old 02-07-2007, 07:38 AM
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any body know how far the pistons stick out of the hole on the 4.8l's i need to know so i know what heads gasket we can use on his eng. .42 should work great but can we close the quench even more?
Old 02-07-2007, 07:14 PM
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anybody?????
Old 02-10-2007, 12:54 AM
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anyone??? help
Old 02-10-2007, 07:26 AM
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Gotcha. Here is the pushrod length calculator on tech. http://ourworld.cs.com/ls1info2/Pushrod+calculator.xls It seems to be fairly accurate. Ive used it a few times Make sure you know the base circle of the cam. Hope this helps.
Old 02-10-2007, 08:35 AM
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which cam lobes does comp start going away from stock base circle?
Old 02-10-2007, 09:38 AM
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I would buy a length checker with the rest of your order. Probably end up back at 7.4 but geometry is a **** and the best way is to buy a checker the math will always have some margin of error.
Old 02-10-2007, 05:08 PM
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Originally Posted by 4.8T
any body know how far the pistons stick out of the hole on the 4.8l's i need to know so i know what heads gasket we can use on his eng. .42 should work great but can we close the quench even more?
a .42 would be bad very very bad
Old 02-10-2007, 06:06 PM
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oh gotcha i was like WHAT then realized lol. .042 there thats better.
Old 02-14-2007, 12:00 AM
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Originally Posted by 4.8T
any body know how far the pistons stick out of the hole on the 4.8l's i need to know so i know what heads gasket we can use on his eng. .42 should work great but can we close the quench even more?
I'm .010 out on my 5.3. I run a .042 cometic so that's .032 quench. Stick out varies from 1 motor to another so you have to measure it.
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