440=?

[superstock440]

OK Guys. I'm building a 65 Coronet and want to built a supersize motor. How big can I go with a 440 block? I want to go as large as I can. This will be running on the strip so if I have to fill block thats fine. Just want to know how far I can go! Thanks for your help. " Hemihenry"

 

[daredevil]

I think kit wise its 540.Sure you could go more with custom parts though. You can check out 440sources pages to get the jist of it.

 

[383man]

Just check it out well as you only want to go so big with a stock block. As daredevel said around 540 may be the smart limit without going to a mega block. Ron

 

[Sixer]

Any max effort motor is going to be much more reliable with one of the aftermarket blocks. With them, just about anything is possible. Even a girdled oe block is limited to about 800hp before things start getting dicey. One failure will have made the aftermarket block a bargain.

 

[RustyRatRod]

Any max effort motor is going to be much more reliable with one of the aftermarket blocks. With them, just about anything is possible. Even a girdled oe block is limited to about 800hp before things start getting dicey. One failure will have made the aftermarket block a bargain.

Gosh, ya think? I was thinkin more like 650.

 

[5.7 hemi]

Gee, the stroker kits available for a 440 make upwards of 600hp, so I'm sure the factory blocks can take more than 650hp, just saying.

 

[Cranky]

850 with the right parts is possible using a 400 block with a half fill....aluminum caps or rods needs to be part of the right parts package.

 

[RustyRatRod]

Gee, the stroker kits available for a 440 make upwards of 600hp, so I'm sure the factory blocks can take more than 650hp, just saying.

.080 and .100 over pistons are available for factory blocks too, but that doesn't mean to do it. If I was going for 650 and up, I'd get an aftermarket block.

 

[daredevil]

I,m pushing 6 out of my 79 rb block 500. Anymore and I would be real nervous. Depends on use too. Mines to cruise and do an occassional burn out. If it was a track car constantly on the rev limiter I would rethink things

 

[5.7 hemi]

All that makes sense. Guess I need to get out the house more often, lol!!

 

[Cranky]

.080 and .100 over pistons are available for factory blocks too, but that doesn't mean to do it. If I was going for 650 and up, I'd get an aftermarket block.

Who has those laying on the shelf? Sonic test any block that is going to get hammered regardless of the bore size.

 

[jess]

big cid is cool and can be useful with the right combo
large strokes and long rods are not hard on oem blocks just my opion
but streaching out the bore can be
i have seen a lot of cyl walls cracked just cause it was punched out to the max
even with a sonic check many ppl have differnt opions on stock block vs aftermarket
my opion is if your gonna use a stock block than keep the bore to a 30 over
and stroke the heck out of it if you want cubes
heads will also play a big role in bore size race heads might like a big bore but you oem vave loc heads dont need a big bore
an example of this is on my old big block ford motor i had a aftermarket svo block
i had a 4.300 stroke and 4.440 bore with a 6.800 rods came out to be a 532 made about 880hp with trick flow A heads i rebuilt that same motor after i bew it up
this time i went to a 4.150 stroke 4.500 bore 6.800 rod came out to be a 528 same cam top end ect
it made over 900hp the heads responed better to a bigger bore
i would assume the same would be for any motor mopars gm's ect
i woud say stock block is good for aroud 650-700 hp
but some pepole can break a cannon ball with a glass hammer
bad tune and not doing proper maint will kill any motor
i have seen most stock blocks crack or cap walk due to bad tune not so much
due to hp