Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

Will the rods clear the cam

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Old May 24, 2012 | 11:19 AM
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Question Will the rods clear the cam

My buddy is building a budget 383 short block and wanted to know if he can run the hyd roller cam below without the small based circle grind.

Parts using:
400 crank
Forged 5.7 Pro Comp I beam rods
Camshaft : Duration at 050 inch Lift
236 int./242 exh.Advertised Duration
288 int./294 exh.Valve Lift with Factory Rocker Arm Ratio
0.520 int./0.540 exh. Lobe Separation 110

So what do you guys think?

Last edited by dkcoleman01; May 25, 2012 at 05:07 PM.
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Old May 24, 2012 | 03:26 PM
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I dont remember which cylinders, but on two of them you have to run a shorter rod bolt. Which means you have to get the rods machined for them.
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Old May 24, 2012 | 04:33 PM
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Originally Posted by cambirdracing
I dont remember which cylinders, but on two of them you have to run a shorter rod bolt. Which means you have to get the rods machined for them.

1,2,5,6 Need to be checked
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Old May 25, 2012 | 10:22 AM
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Judging by this ad, you are going to have to have them clearanced if they aren't already.

http://www.skipwhiteperformance.com/...aspx?Item=4104
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Old May 27, 2012 | 11:05 AM
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Originally Posted by CNC BLOCKS N/E
1,2,5,6 Need to be checked
This guy would know.

The problem with your question is that there is no what to know if it will work before you try it. With a normal base circle camshaft, mild lobe lift, and some rod bolts that have small heads like ARP 2000s, you'll have to do minimal work. I've run 3.875" cranks and seen people run 4" cranks with the right parts. At that point you'll be grinding the bottom of the cylinder, rod bolts, rods, pan rail area, and beating on the pan a bit too. Put the pan on with no gasket and rotate it, if it doesn't hit then you'll be alright.
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Old May 27, 2012 | 11:48 AM
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I've heard before that not all 383 strokers required a small based circle cam with certain rods but wasn't sure he would need the small based circle grind.

Thanks guys for your responses. I've told him what you all have said, so he knows what to expect and check. We shall see what happens.
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Old May 28, 2012 | 07:47 AM
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Originally Posted by dkcoleman01
I've heard before that not all 383 strokers required a small based circle cam with certain rods but wasn't sure he would need the small based circle grind.

Thanks guys for your responses. I've told him what you all have said, so he knows what to expect and check. We shall see what happens.
You need a stroker rod like the scat Pro Comp I beams which offer alot cam clearance and pan rail clearance, I use a lot of the Callies rods which off the same clearance and seem to be very dependable.

There are a lot of cheap kits out there that offer non stroker rods so becarefull
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