Engine Rebore

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Retro
POC Jr. Poster
Posts: 236
Joined: Sun May 22, 2011 9:20 am
Membership No: 11-E207
Year: 1995
Model: Pontiac Firebird
Engine: 350
Name: Pontiac Pete
Location: Prestwich/Whitefield area
Location: Prestwich/Whitefield area
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Engine Rebore

Post by Retro » Mon May 25, 2015 2:37 pm

I was just curious. I was watching a car show where they rebored the engine. That got me thinking when it comes to the Pontiac much smaller 3.4 and 3.8 engines, what size could they be rebored to :think:
Making The World A Better Place...One Muscle Car At A Time...

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bhm1712
Site Admin
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Joined: Sun May 10, 2009 4:58 pm
Membership No: 20-607
Year: 2001
Model: Trans-Am WS6
Engine: 350
Name: Ian
Location: Nottingham
Location: Nottingham
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Re: Engine Rebore

Post by bhm1712 » Mon May 25, 2015 6:43 pm

Reboring is usually only done to return a cylinder wall to a useable state when rebuilding an engine. The aim is to remove any pitting, scoring etc. maximum recommended would be no more than 0.060 over bore as the cylinder walls are not so thick that they can be bored out endlessly. Plus, the coolant jacket is around the cylinders and removing too much meat can drastically affect the cooling of the engine. In terms of boring purely for a capacity increase I have seen and heard of it being done but in terms of longevity and power for your money it would be more economic to stroke the engine to a larger displacement.
Ian Hopkinson - Membership Manager & Forum Administrator
Northern England & Midlands Rep

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Retro
POC Jr. Poster
Posts: 236
Joined: Sun May 22, 2011 9:20 am
Membership No: 11-E207
Year: 1995
Model: Pontiac Firebird
Engine: 350
Name: Pontiac Pete
Location: Prestwich/Whitefield area
Location: Prestwich/Whitefield area
Contact:

Re: Engine Rebore

Post by Retro » Mon May 25, 2015 8:21 pm

Thanks Ian. Your an impressive engineer
Making The World A Better Place...One Muscle Car At A Time...

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