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boring 0.30

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Angelking
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Posts: 104
Joined: Wed Dec 21, 2016 8:46 am

boring 0.30

Post #1 by Angelking » Mon Jan 23, 2017 11:10 am

Machine shop just called and he recommends boring my 300 block 030 over. There are ridges built up and a couple of cylinders are slightly out of contour. Knowing this, what brand of pistons would you recommend? If I am going to bore it, might as well hop it up a bit.


SM

Harte3
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Location: Spokane, WA

Re: boring 0.30

Post #2 by Harte3 » Mon Jan 23, 2017 1:04 pm

'83 F150 300, 0.030 over, Offy DP, Holley 4160/1848-1 465 cfm, Comp Cam 260H. P/P head, EFI exhaust manifolds, Walker Y Pipe, Super Cat, Turbo muffler, Recurved DSII, Mallory HyFire 6a, ACCEL Super Stock Coil, Taylor 8mm Wires, EFI plugs.

pmuller9
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Joined: Tue Aug 06, 2013 12:33 am
Location: Columbus, Indiana

Re: boring 0.30

Post #3 by pmuller9 » Mon Jan 23, 2017 3:14 pm

The stock pistons you have now are the highest compression "Off the shelf" pistons for the 1965-1986 300 head @ 8.7
The problem with the cast pistons if you use them for extended higher rpm the skirts will break off into the oil pan.
https://dl.dropboxusercontent.com/u/393 ... piston.jpg

You can use the stronger hypereutectic pistons for an 8.8 compression ratio if you use the smaller combustion chamber 240 head or the EFI head.

The next jump cost wise is a set of Autotec forged pistons for $500.
They are custom so you get to choose the CH and the dish volume along with being able to use the more modern thinner ring sets

Angelking
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Posts: 104
Joined: Wed Dec 21, 2016 8:46 am

Re: boring 0.30

Post #4 by Angelking » Mon Jan 23, 2017 6:11 pm

Harte3 wrote:https://www.summitracing.com/parts/slp-h519p


Thanks, have sent them an email asking if those pistons can be obtained 030. over....


SM

Angelking
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Posts: 104
Joined: Wed Dec 21, 2016 8:46 am

Re: boring 0.30

Post #5 by Angelking » Mon Jan 23, 2017 6:17 pm

pmuller9 wrote:The stock pistons you have now are the highest compression "Off the shelf" pistons for the 1965-1986 300 head @ 8.7
The problem with the cast pistons if you use them for extended higher rpm the skirts will break off into the oil pan.
https://dl.dropboxusercontent.com/u/393 ... piston.jpg

You can use the stronger hypereutectic pistons for an 8.8 compression ratio if you use the smaller combustion chamber 240 head or the EFI head.

The next jump cost wise is a set of Autotec forged pistons for $500.
They are custom so you get to choose the CH and the dish volume along with being able to use the more modern thinner ring sets


I am looking at the pistons at summit.. (Hypereutectic) I don't think right now I am going to change the head. Maybe at a later date...

Once I get the car built and fix the multitude of things I am sure will need to be fixed I will look at hopping up the motor. That is if the Model A rear end can handle it...

SM

pmuller9
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Joined: Tue Aug 06, 2013 12:33 am
Location: Columbus, Indiana

Re: boring 0.30

Post #6 by pmuller9 » Mon Jan 23, 2017 6:17 pm

I'm retracting my post since you answered my question before I posted. LOL

J.R.
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Location: SoCal

Re: boring 0.30

Post #7 by J.R. » Sat Jan 28, 2017 1:54 pm

AngelKing posted: "... That is if the Model A rear end can handle it... "[!!!]

Sure hope you're kidding on that rear end. :shock: Not too many years before the Model A came out, Henry Ford discontinued offering the company's 6-cylinder engine, since its torque would trash their transmissions at that time. Can't imagine the Model A's rear gears & diff were much stronger than the trannies, and they would be especially vulnerable to the low-rpm torque of even a bone stock Ford 300" six. :roll:

J.R.
SoCal

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