Prepping a stock block for racing
#1968237
12/12/15 08:42 AM
12/12/15 08:42 AM
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Joined: Dec 2006
Posts: 4,647 aotearoa
rebel
OP
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OP
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Posts: 4,647
aotearoa
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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?
Last edited by rebel; 12/12/15 08:45 AM.
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Re: Prepping a stock block for racing
[Re: rebel]
#1968250
12/12/15 10:03 AM
12/12/15 10:03 AM
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Joined: Jan 2005
Posts: 4,243 Charlotte, North Carolina
sgcuda
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master
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Charlotte, North Carolina
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Chase every thread and blow them out with air. Deck and line bore check while at machine shop. Modifying oil pickup to 1/2" I think is still up for debate but I would recommend it.
[image][/image]
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Re: Prepping a stock block for racing
[Re: Locomotion]
#1968269
12/12/15 11:34 AM
12/12/15 11:34 AM
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Joined: Feb 2003
Posts: 6,849
fullmetaljacket
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master
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Re: Prepping a stock block for racing
[Re: rebel]
#1968323
12/12/15 01:05 PM
12/12/15 01:05 PM
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Joined: Oct 2007
Posts: 4,206 New York
polyspheric
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master
Joined: Oct 2007
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New York
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How will you know if you didn't completely gassed out all solvents, petro products, LocTite, etc?
You'll drive over the crank when the paint film reaches the pump.
Boffin Emeritus
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Re: Prepping a stock block for racing
[Re: polyspheric]
#1968325
12/12/15 01:10 PM
12/12/15 01:10 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Romeo MI
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How will you know if you didn't completely gassed out all solvents, petro products, LocTite, etc?
You'll drive over the crank when the paint film reaches the pump. The factory paints the race blocks also.. I've been doing it for years also.. never had any issue of driving over the crank
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Re: Prepping a stock block for racing
[Re: FastmOp]
#1968369
12/12/15 02:29 PM
12/12/15 02:29 PM
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Joined: Feb 2005
Posts: 20,156 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,156
PA.
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I would never ever use Por15 but that's just me. Heck I won't even use that crap on the bottom of my cars any more after it peeled of mine and several other Friends cars.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Prepping a stock block for racing
[Re: pittsburghracer]
#1968374
12/12/15 02:44 PM
12/12/15 02:44 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Romeo MI
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I would never ever use Por15 but that's just me. Heck I won't even use that crap on the bottom of my cars any more after it peeled of mine and several other Friends cars. Same here.. I use Rustoleum .. I used Chassis Saver and POR15 on my chassis.. that stuff SUCKS.. it peels off in sheets... then I sprayed it with Rustoleum .. still holding great
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Re: Prepping a stock block for racing
[Re: rebel]
#1968422
12/12/15 03:56 PM
12/12/15 03:56 PM
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Joined: Jan 2003
Posts: 21,065 Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,065
Niles , Ohio
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Dont forget main studs.They have to line hone after they are installed but add strength.Degree cam also.Balance and clearance is important also.Rocky
Chrysler Firepower
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Re: Prepping a stock block for racing
[Re: rebel]
#1968507
12/12/15 06:17 PM
12/12/15 06:17 PM
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Joined: Oct 2007
Posts: 4,206 New York
polyspheric
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master
Joined: Oct 2007
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New York
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The difference: how do you know yours is as clean as a new block?
Boffin Emeritus
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Re: Prepping a stock block for racing
[Re: polyspheric]
#1968509
12/12/15 06:22 PM
12/12/15 06:22 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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The difference: how do you know yours is as clean as a new block? Have it hot tanked... then spray it with brake cleaner.. blow it dry.. spray paint with Rustoleum that has worked for years now
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Re: Prepping a stock block for racing
[Re: polyspheric]
#1968512
12/12/15 06:27 PM
12/12/15 06:27 PM
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Joined: Feb 2009
Posts: 1,532 off the grid
340B5
pro stock
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pro stock
Joined: Feb 2009
Posts: 1,532
off the grid
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The difference: how do you know yours is as clean as a new block? How would I know a new block is as clean as mine? Clean it once, clean it again and then when you got it clean, Clean it again.
Yeah, it's got a smallblock.
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Re: Prepping a stock block for racing
[Re: MR_P_BODY]
#1968522
12/12/15 06:42 PM
12/12/15 06:42 PM
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Joined: Feb 2005
Posts: 982 western pennsylvania
b1dartsport
super stock
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super stock
Joined: Feb 2005
Posts: 982
western pennsylvania
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The difference: how do you know yours is as clean as a new block? Have it hot tanked... then spray it with brake cleaner.. blow it dry.. sray paint with Rustoleum that has worked for years now. After you are done with all grinding, filing and block prep If you don't have access to a hot tank, take the block out on the driveway and hit all the passages with a pressure washer and blow it dry with a compressor. If you are not planning on painting anything hit it with WD40 or similar light oil because it will begin to rust almost before your eyes. wave:
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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: 3,517 pacific northwest
Stroker Scamp
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master
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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: 8,233 fredericksburg,va
cudaman1969
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master
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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
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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
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Master
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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
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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: 12,419 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
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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