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Old 12-25-2012, 06:48 PM
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SBC Approximate Machining Costs

Hey guys. I'm trying to get a game plan together for my next motor build. I want to drop off a 350 block and a 383 rotating assembely and pick it up ready to go. Can you guys please provide a list of what the machine shop will do and the approximate cost of the job. Ie new cam bearings, bore the cylinders, deck the block, etc. Aslo maybe what is totally neccesary and what is a good idea but isn't totally neccesary. If I need to provide more info please ket me know.

Thanks.

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Old 12-25-2012, 07:37 PM
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pricelist
Automotive Machine Shop Services Price Sheet:MA,CT,RI,VT,NH,ME,NY,NJ
Engine Balancing, Custom Engine Rebuilding, Cylinder Boring by Buds Machine and Engine Shop
Machine Shop Prices
Northern Michigan automotive racing engine machine shop pricing
Machine Shops Services - BES Racing Engines

What I would do on any street/strip build....
1. Check main bearing bores for being round and parallel with each other. Align-hone or align-bore to correct.
2. Registering off main bearing bore, cut block decks to desired block deck height based on stack measurement and head gasket thickness.
3. Bore and hone with torque plates for next size piston and rings. Hone specifically for the ring material used.
4. Check for gaps at the intake manifold/cylinder head interface. This is best done after all the trial assemblies are done and after you have torqued the head bolts. I have even sacrificed a pair of intake gaskets for this. Torque everything down, then take the intake manifold off and inspect the gaskets for being pinched all the way around each and every port. If the manifold doesn't fit in between the heads correctly or is cut on a different angle than the cylinder heads, you will never get a seal there. If the gap is toward the outside, you will be able to find the vacuum leak by spraying a combustible material around the interface. But if the mis-match is on the bottom side of the ports, you will not find it with spraying. The motor will suck in oily crankcase vapors when the intake valve is open with the piston descending in the cylinder. You will get burned oil out the exhaust and fresh oil on the spark plugs. So if you guys pull spark plugs out that are oily and the motor is fairly fresh, you may now have an idea of what happened. This may happen only on one cylinder or more than one, depending on where the ports are not sealed.

If there is a gap, either on the inside or on the outside, it can be corrected by taking a cut on the intake manifold face that is equal to the angle of the cylinder heads. You will want to enlist the aid of a professional machinist to help you figure it out, how much to cut and at what angle. I'm surprised that this doesn't come up more often in discussions on engine building.
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Old 12-25-2012, 10:22 PM
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Thanks the for excellent info tech. As always much apprecited. Is that is all that's reqiured? Or is that the things over and above the norm?? I was kinda looking for (sorry to be a pain)

Clean and mag block $75
Bore and hone cyls $300
Install new cam bearings $150
Etc
Etc
Etc
I appreciate the pricing lists you attached but I'm not 100% sure of everything involved
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Old 12-25-2012, 10:45 PM
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There are a thousand things to do. I wrote what I did because not everyone does those things on a build and I feel that they're necessary to do it correctly.
You know, it may help you to get all this fixed in your mind if you do a little reading. I highly recommend this one for starters....
Amazon.com: How to Rebuild Your Small-Block Chevy (9781557880291): David Vizard: Books Amazon.com: How to Rebuild Your Small-Block Chevy (9781557880291): David Vizard: Books
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Old 12-25-2012, 11:11 PM
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Ok. Thanks tech. LOL!!! I actually got this book for Xmas severeal years ago and have never read it all the way through.(just sections at a time). I guess its time I read the whole thing.

Hey tech what do you think about going with an assembled short block?? Any companies that you would recomend??
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Old 12-28-2012, 02:15 PM
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Quote:
Originally Posted by prostcelica View Post
Hey tech what do you think about going with an assembled short block?? Any companies that you would recomend??
Don't know, never bought an assembled short block. I don't trust anyone but myself.
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