408 ci from a 350 block!

[79rustyk10]

I just saw this in the new issue of car craft. They took an aftermarket 4" stroke crank an crammed it into a 350 block, well not quite crammed but massaged in there. they used ford 331 stroker pistons, and 5.850" rods.

With 882's, an iron intake, and a mild cam it made 429 Ft lbs of torque at 3700 rpm and 355 hp 4900 rpm. they dyno sheet started at 2500rpm, there it had 409 ft lbs, and never dropped below 404 ft lbs of torque.

This has really got me thinking about that freshly machined .030 over block in my basement

 

[original balzer]

http://www.worldcastings.com/prods_pages/engines/motown454.htm

 

[4X4HIGH]

I just saw this in the new issue of car craft. They took an aftermarket 4" stroke crank an crammed it into a 350 block, well not quite crammed but massaged in there. they used ford 331 stroker pistons, and 5.850" rods.

With 882's, an iron intake, and a mild cam it made 429 Ft lbs of torque at 3700 rpm and 355 hp 4900 rpm. they dyno sheet started at 2500rpm, there it had 409 ft lbs, and never dropped below 404 ft lbs of torque.

This has really got me thinking about that freshly machined .030 over block in my basement

It's very doubtful that it was a stock production 350 block as when stroking one to 383 using the 3.75" stroke crank the rod bolts come VERY close to the cam lobes and going with an additional .250" stroke means the bolts are .125" closer and i'm pretty sure that won't work with a production 350 block. They probably used an aftermarket block with a raised cam bore and also a block that is clearanced at the oil pan rail for such a long stroke.

 

[79rustyk10]

I looked at the carcraft website to find a link, but they dont have anything about it up yet.

 

[Fabrimacator21]

http://www.worldcastings.com/prods_pages/engines/motown454.htm

Read my mind....

 

[82355]

It's very doubtful that it was a stock production 350 block as when stroking one to 383 using the 3.75" stroke crank the rod bolts come VERY close to the cam lobes and going with an additional .250" stroke means the bolts are .125" closer and i'm pretty sure that won't work with a production 350 block. They probably used an aftermarket block with a raised cam bore and also a block that is clearanced at the oil pan rail for such a long stroke.

That is what I was wondering, but why would you put 882's on an aftermarket block???

Martin

 

[Stomis]

Last I remember from reading up on motors for my Monte the biggest small block from a stock block is a 406 via a 400+ 40thousands.

 

[82355]

Last I remember from reading up on motors for my Monte the biggest small block from a stock block is a 406 via a 400+ 40thousands.

A 406 is a 0.030" over 400, not 0.040" over. You can go bigger on a stock block small block.

Martin

 

[4X4HIGH]

I know you can build a 440ci SBC using a factory 400 block bored .060" using a 4" stroke crank (i personally wouldn't do it but it's been done).

 

[pauly383]

I wouldn't want any production 400 block more than .030 over , thats not a lot of meat left on the thrust side of the bores . Aftermarket block all the way .

The newest aftermarket blocks accept the late model roller valvetrain , the old style rear main cranks , and have better cooling and oiling . and at under 2 grand now .

 

[pauly383]

I like the guy on team Chevelle running 12's with a 307 block and crank

 

[yellowK20]

It's very doubtful that it was a stock production 350 block as when stroking one to 383 using the 3.75" stroke crank the rod bolts come VERY close to the cam lobes and going with an additional .250" stroke means the bolts are .125" closer and i'm pretty sure that won't work with a production 350 block. They probably used an aftermarket block with a raised cam bore and also a block that is clearanced at the oil pan rail for such a long stroke.

Its possible you do have to run a small base circle cam and the correct rods and even then its still tight.

thats a popular motor for the circle track set