sbc info
 

400 sbc i bought from a guy, he never ran it, but the motor is bored 0.60 over i'm wondering if it is to much , and if any body have info on a motor like that and bored that much. block 4 bolt.

Have it sonic tested before you go any further!!

X2, i've always thought .040 was pushing the limits.

JMO

Zip.

sbc
 

in any what is the worst case scenario?

Re: sbc
 

Just a WAG on my part, but internal parts, converting to external parts? Hit me with the flame-thrower, I got it coming :!:

sbc
 

I'm new to all of this, sounds like your saying it is going to blow up.

Re: sbc
 

No sir, but you asked for a worst case scenario.

400
 

IS IT STREET DRIVEN OR JUST RACED?

sbc
 

street and race

thin cyl. walls and heat can only produce cracks...

As Hink and advanceengin said. The typical 400 stock block will only have a .150 wal thickness average when bored .030 over. Some builders will sonic test them and shift the bore a little to inprove the wall thinkness after bored. They also ran hot in stock condition IE the steam holes from the factory. Filling the block to the water pump is almost always a No,No for street driving but comonly used in racing applications, but will usually run hot on the street if driven any distance. I think Hink stated in a different thread that testing 6 blocks he could only find 2 that would bore .030 over due to core shift. Sometime the walls can get as thin as .080 tk. due to rust away from the inside, don't forget these blocks are 30 or more yrs. old after boring .030, not good and will run hot and be subject to cracking.

JMO

Zip.

sbc
 

thank you

sbc
 

before I end this forum, thank you everyone for their knowledge, one other thing can i save it by putting sleeves in the cylinders

Re: sbc
 

Not advised if you run water, because the web is too narrow between the cylinders and they tend to leak. I've seen 2 that has happened to.

Again just my opinion

Zip.

Suicidebomb> your too funny....lol

Get a 350 block and be done with it - or drag out the ole credit card and order up a Dart little "M"
Later Cp

Re: sbc
 

[quote="chubbyx1"] before I end this forum




No wait, please don't end it! We need this forum to fulfill our very existence!
Cp

sbc
 

Thanks to all for your replies, results is one of the cylinder keeps getting anti freeze inside and motor was tested for only 60lbs of compression.