whats the most cubic inches i can get without boring - Ford Mustang Forum
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post #1 of 24 (permalink) Old 09-06-2010 Thread Starter
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whats the most cubic inches i can get without boring

my 5.0 is gettin up there in miles. i leave for college in about a year and i want it rebuilt before i leave. my auto tech class wants to tear it down now but i want to take my time and do my research. i wanna up the cubic inches a bit but not bore it over. just stroke. whats the most i can get without boring?
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post #2 of 24 (permalink) Old 09-06-2010
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Stroker with stock deck height and bore can either be 331 or 347. Why wouldn't you want to bore it? lack of tools?

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post #3 of 24 (permalink) Old 09-06-2010 Thread Starter
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lack of tools and cash. plus i dont wanna deal with finding other pistons and rings and crap
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post #4 of 24 (permalink) Old 09-06-2010
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Originally Posted by knappster94gt View Post
my 5.0 is gettin up there in miles. i leave for college in about a year and i want it rebuilt before i leave. my auto tech class wants to tear it down now but i want to take my time and do my research. i wanna up the cubic inches a bit but not bore it over. just stroke. whats the most i can get without boring?
What is the logic behind that......:?:

Do it right or just don't bother......
post #5 of 24 (permalink) Old 09-06-2010
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Your going to have to get new pistons anyway for the right stroker.

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post #6 of 24 (permalink) Old 09-06-2010
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Well you did say it's getting up there in miles so even a standard rebuild might call for boring. Maybe your shop teacher can get a local machine shop to donate some work. Think you can still get stroker kits with the standard bore pistons but why, cost would be the same. Stock bore but stroked is actually 327 CI or 342 CI. I would love to tell people that I was running a 327 Ford motor!
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post #7 of 24 (permalink) Old 09-06-2010
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Without boring it is possible to get a 327 or a 342.

That said...
1. If your car is "getting up in miles" it will need to be bored, if for no other reason than to give new rings a fresh surface to work themselves into.
2. There is no stroker that you can use your current rods and pistons. You will need longer rods and pistons with a shorter compression distance.

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Do it right or just don't bother......
That is the best advice I have ever gotten

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post #8 of 24 (permalink) Old 09-06-2010
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Dave is right, you can use a stock 4.000 bore but add in the 3.250 stroke for a 327 or a 3.400 stroke for a 342. That's about the limit for a stock 5.0 block.

How many miles does it have? If it's really high, you might need to get it bored. If they're out of round, it won't have a good ring seal.

But you'd need new pistons for sure because stock pistons won't work with a stroker kit, they'll be coming out of the tops of the bores and crashing into the heads so you can't get out of that. You'll need pistons that have the wrist pin relocated to compensate for the longer stroke and stock pistons won't work.

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post #9 of 24 (permalink) Old 09-06-2010 Thread Starter
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well it has 175,000 miles. that being said its a great running car and still holds great compression. i dont know a whole lot about boring. im just worried its gonna cut my fuel economy in half. maybe you guys can help answer...???
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post #10 of 24 (permalink) Old 09-06-2010 Thread Starter
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cause if not then ill take it all the way to 427!!!:kooky:
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if your gonna do stoker you need new pistons for clearance issues and why risk having scored up cylinder walls that wont hold compressions because rings cant seat well? I mean you have the block torn all the way down why not just bore out to .030 over and have a clean cylinder walls for your rings to seal up well? If you wanna save a few extra bucks you will be paying even more in the long run if something goes wrong. Something I learned while working on engines is that you never wanna HOPE it will work, you gotta make SURE its gona work..
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Quote:
Originally Posted by knappster94gt View Post
well it has 175,000 miles. that being said its a great running car and still holds great compression. i dont know a whole lot about boring. im just worried its gonna cut my fuel economy in half. maybe you guys can help answer...???
Ehh......

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cause if not then ill take it all the way to 427!!!:kooky:
Huh? :run_over:

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Lol, relatively good fuel economy can still be achieved with a performance engine. Its a trade off though, to make more power you have to burn more............GAS!

95" Vert - 302 Stock short block (minus cam)

All of the good suspension upgrades, Twisted Wedge Heads, Professional Products upper and lower, AFM B-31 cam, Vortech V2-SQ @16lbs, 42lb injectors, Pmass 83mm, 75mm TB, 1.6 rollers, AFM Power Pipe, AFM piggy back ECU, BBK long tubes, BBK X-pipe, Magna pack, T-5 W/ AFM flywheel and clutch kit & 3.73's

68 Camaro RS/SS Frame Off Resto, BBC 505 Stroker
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cause if not then ill take it all the way to 427!!!:kooky:
... A 5.0 block can't be taken to a 427.

I don't think any 8.2" deck SBF can be taken to a 427....

But what do I know

Quote:
Originally Posted by knappster94gt View Post
well it has 175,000 miles. that being said its a great running car and still holds great compression. i dont know a whole lot about boring. im just worried its gonna cut my fuel economy in half. maybe you guys can help answer...???
If It runs great, holds compression, and you're on a budget leave it alone.

Stroking will cost you more that boring fuel consumption wise. The absolute maximum a production block can be bored is .060", while the maximum you can stroke it .400". Do the math.

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post #15 of 24 (permalink) Old 09-06-2010 Thread Starter
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Quote:
Originally Posted by YLDPONY View Post
... A 5.0 block can't be taken to a 427.

I don't think any 8.2" deck SBF can be taken to a 427....

But what do I know
i thought they could. maybe im wrong but i thought 427 was like the PEAK cubic inch displacement for a SB ford
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