useing my bored out 40 over or get my other motor bored for the first time

s10curly · 10-28-2009, 02:26 AM

hey guys i got my original 350 build that through a rod which i had bored over to 40 about 4 months ago and i have another motor that i need to have bored but i wont worry about it if i dont need it but my problem is i have heard that you have to worry about over heating after you go past 30 and i am not terrabally worried but still not sure what i should do what do u think,

03blazer · 10-28-2009, 02:54 AM

The cylinder walls are just a little bit thinner... It souldn't make that much of a difference... If anything, it'll just make the coolant heat up a little faster... What all are you using to cool it?

s10curly · 10-28-2009, 03:12 AM

im not sure what you mean by what am i useing to cool it i have a dual fan and thats it i guess

03blazer · 10-28-2009, 03:14 AM

I meant like what radiator and fans and stuff like that.

sewerrat · 10-28-2009, 04:21 AM

Mine is .040 over. It runs on the warm side during long runs towing but never overheated yet. I'm using the vette rad with a clutch driven fan but no a/c probably makes a big difference.

Maverick2664 · 10-28-2009, 01:45 PM

theres nothing wrong with .040 over

SH-60B · 10-28-2009, 04:41 PM

An overbore has no effect on the cooling system. If it's overheating there is an issue with the cooling system or the tune, nothing to do with the bore size or wall thickness.

slownlo · 10-28-2009, 05:42 PM

60 over you might have some problems but 40 over youll be alright unless you live in orlando, fl. shit its 90 right now.

firstgenon24s · 10-28-2009, 10:18 PM

Im .60 over and I live in orlando florida with no problems lol.If you do live where its hot Id prob. run a 180 thermo.

dre0227 · 10-29-2009, 08:13 PM

im .60 over no problems, like somebody else said if your over heating its due to another problem. My old mans bbc 427 is .110 over and it never gets hot.

firstgenon24s · 10-29-2009, 11:02 PM

Yep I agree with that statement 100%

10-28-2009, 02:26 AM	#1
s10curly curly Join Date: Apr 2009 Posts: 12 Location: i live in frederick md User is: OffLine	useing my bored out 40 over or get my other motor bored for the first time hey guys i got my original 350 build that through a rod which i had bored over to 40 about 4 months ago and i have another motor that i need to have bored but i wont worry about it if i dont need it but my problem is i have heard that you have to worry about over heating after you go past 30 and i am not terrabally worried but still not sure what i should do what do u think,
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10-28-2009, 02:54 AM	#2
03blazer Gettin' ready for V8! Join Date: Dec 2007 Posts: 338 Location: Gulfport, MS User is: OffLine	Re: useing my bored out 40 over or get my other motor bored for the first time The cylinder walls are just a little bit thinner... It souldn't make that much of a difference... If anything, it'll just make the coolant heat up a little faster... What all are you using to cool it?
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10-28-2009, 03:12 AM	#3
s10curly curly Join Date: Apr 2009 Posts: 12 Location: i live in frederick md User is: OffLine	Re: useing my bored out 40 over or get my other motor bored for the first time im not sure what you mean by what am i useing to cool it i have a dual fan and thats it i guess
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10-28-2009, 03:14 AM	#4
03blazer Gettin' ready for V8! Join Date: Dec 2007 Posts: 338 Location: Gulfport, MS User is: OffLine	Re: useing my bored out 40 over or get my other motor bored for the first time I meant like what radiator and fans and stuff like that.
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10-28-2009, 04:21 AM	#5
sewerrat Registered User Join Date: Dec 2007 Posts: 278 Location: Maui User is: OffLine	Re: useing my bored out 40 over or get my other motor bored for the first time Mine is .040 over. It runs on the warm side during long runs towing but never overheated yet. I'm using the vette rad with a clutch driven fan but no a/c probably makes a big difference.
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10-28-2009, 01:45 PM	#6
Maverick2664 Heavy Metal Body Man Age: 25 Join Date: Jun 2007 Posts: 2,846 Location: Erie PA User is: OffLine	Re: useing my bored out 40 over or get my other motor bored for the first time theres nothing wrong with .040 over
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10-28-2009, 04:41 PM	#7
SH-60B Registered Neanderthal Join Date: Nov 2007 Posts: 2,335 Location: Meriden/CT/USA User is: OffLine	Re: useing my bored out 40 over or get my other motor bored for the first time An overbore has no effect on the cooling system. If it's overheating there is an issue with the cooling system or the tune, nothing to do with the bore size or wall thickness.
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10-28-2009, 05:42 PM	#8
slownlo built for stangs Age: 28 Join Date: Jun 2004 Posts: 182 Location: orlando fl User is: OffLine	Re: useing my bored out 40 over or get my other motor bored for the first time 60 over you might have some problems but 40 over youll be alright unless you live in orlando, fl. shit its 90 right now.
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10-28-2009, 10:18 PM	#9
firstgenon24s Registered User Age: 21 Join Date: Nov 2007 Posts: 1,693 Location: User is: OffLine	Re: useing my bored out 40 over or get my other motor bored for the first time Im .60 over and I live in orlando florida with no problems lol.If you do live where its hot Id prob. run a 180 thermo.
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10-29-2009, 08:13 PM	#10
dre0227 It is what it is bitch... Join Date: May 2007 Posts: 1,953 Location: MN User is: OffLine	Re: useing my bored out 40 over or get my other motor bored for the first time im .60 over no problems, like somebody else said if your over heating its due to another problem. My old mans bbc 427 is .110 over and it never gets hot.
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10-29-2009, 11:02 PM	#11
firstgenon24s Registered User Age: 21 Join Date: Nov 2007 Posts: 1,693 Location: User is: OffLine	Re: useing my bored out 40 over or get my other motor bored for the first time Yep I agree with that statement 100%
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