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Re: Prepping a stock block for racing
[Re: MR_P_BODY]
#1968652
12/12/15 11:13 PM
12/12/15 11:13 PM
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Joined: Nov 2004
Posts: 3,518 pacific northwest
Stroker Scamp
master
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master
Joined: Nov 2004
Posts: 3,518
pacific northwest
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LOL.. its funny you use a screwdriver on the stand just like I do X2
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip 73 Duster 340 street strip 12.79 @ 105
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Re: Prepping a stock block for racing
[Re: rebel]
#1968658
12/12/15 11:29 PM
12/12/15 11:29 PM
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Joined: Apr 2013
Posts: 345 Nebraska
451Cuda
enthusiast
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enthusiast
Joined: Apr 2013
Posts: 345
Nebraska
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Apart from sonic testing, magnafluxing & Torque Plate honing, what prep work do you do to make a factory block race ready? I was deburring my 400 block, cleaning up all the casting flash & generally smoothing my block, when a Chevy friend looked at what was doing & said I was wasting my time. Do any of you guys that work on stock block racers do any cleanup of the block? I coated all the inside surfaces with POR15 to make for a smoother surface for oil return, am I going too far? Alot of machining steps involved but the main ones are: Make sure decks are 100% square and parallel to the corrected crank center, bush lifter bores to make sure they're correctly positioned and aligned with the cam lobes, make sure the crank throws are indexed correctly and the journals have proper radius and clearances, bore and hone with torque plates and main caps installed (ideally at operating temp). When you clean up after machining make sure you remove ALL galley plugs and thoroughly scrub all passages with strong detergent and rinse with hot water then blown dry with compressed air - repeat until brushes come out clean and no debris is blown out.
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Re: Prepping a stock block for racing
[Re: Stroker Scamp]
#1968660
12/12/15 11:32 PM
12/12/15 11:32 PM
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Joined: Jan 2004
Posts: 8,354 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,354
fredericksburg,va
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LOL.. its funny you use a screwdriver on the stand just like I do X2 And somehow they can't drill the hole so the engine sets straight up!
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Re: Prepping a stock block for racing
[Re: MR_P_BODY]
#1968666
12/12/15 11:43 PM
12/12/15 11:43 PM
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Joined: Dec 2006
Posts: 4,647 aotearoa
rebel
OP
master
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OP
master
Joined: Dec 2006
Posts: 4,647
aotearoa
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LOL.. its funny you use a screwdriver on the stand just like I do mine is actually a 1/4 drive screwdriver but the ball bearing fell out years ago so the sockets don't stay on it. but it recycles real nice in this job. many a time i've thought about cutting it down but i never seem to get around to it.
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Re: Prepping a stock block for racing
[Re: rebel]
#1968762
12/13/15 02:06 AM
12/13/15 02:06 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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One other thing I do is to glue screen into the intake valley.. that way it keeps any top end parts from getting down to the bottom.. I use JB weld to glue it in.. then I paint the valley area.. I cover the screen when painting
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Re: Prepping a stock block for racing
[Re: MR_P_BODY]
#1968800
12/13/15 04:18 AM
12/13/15 04:18 AM
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Joined: Dec 2006
Posts: 4,647 aotearoa
rebel
OP
master
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OP
master
Joined: Dec 2006
Posts: 4,647
aotearoa
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One other thing I do is to glue screen into the intake valley.. that way it keeps any top end parts from getting down to the bottom.. I use JB weld to glue it in.. then I paint the valley area.. I cover the screen when painting 1 step ahead of you Mr P. I've made a couple of these in the past but I'm going to reallocate this one from the dead block it resides in.
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Re: Prepping a stock block for racing
[Re: rebel]
#1968981
12/13/15 03:58 PM
12/13/15 03:58 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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One other thing I do is to glue screen into the intake valley.. that way it keeps any top end parts from getting down to the bottom.. I use JB weld to glue it in.. then I paint the valley area.. I cover the screen when painting 1 step ahead of you Mr P. I've made a couple of these in the past but I'm going to reallocate this one from the dead block it resides in. Looks nice
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Re: Prepping a stock block for racing
[Re: rebel]
#1969535
12/14/15 04:43 PM
12/14/15 04:43 PM
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Joined: Jan 2005
Posts: 12,424 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,424
Kalispell Mt.
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I clean them with really strong degreaser like red-hot or bleach-white for cleaning brake dust off wheels and tires, let it soak but don't let it dry, then I hit it with hot watter from my pressure washer, a couple times of this and it is ready to check out and machine if it checks out OK, dirll 1/8th drainback holes in lifter valley to drain oil puddles right onto cam lobes (all 16 if possible), then wash it same way a couple more times when back from machine shop, then test fit everything, adjust grind where needed dissasemble it and clean a couple more times and set up a big heater under the block to help it dry quickly, then mask it off and paint then assemble.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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