Visit The Dirt Forum for More Information

Author Topic:   440 c.i. sbc???
'01HARRIS
Member
posted June 04, 2003 08:46 PM
Has anyone here ever heard how to get 440 cubic inches out of a small block chevy?

Is it possible?

jay116
Member
posted June 04, 2003 11:53 PM
i just got the new issue of Hot Rod and there is a company building 454 SBCs
But that isn't a stock block. They did some lumps on the sides for oil to splash into and reworked the water jackets.

------------------
Jason Boivin
http://www.rcracing-team.com


sdhnc29
Member
posted June 05, 2003 08:05 AM
The most common combo is 4.185" bore X 4.000" stroke . You should only build this combo with a tall deck block , and I'd start it's life out with a 4.125" bore which would be a 428ci .

Steve

------------------
Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


Sidebite252
Member
posted June 05, 2003 03:51 PM
Where does this 4" stroke crank shaft come from? Is is aftermarket or OEM? What block? Aftermarket or OEM? Interesting combination!


dirtbuster
Member
posted June 05, 2003 04:06 PM
you can buy aftermarket 4" cranks from many suppliers. The block is most likely a dart iron eagle block which has been designbed for the extra clearance needed for that combo.


'01HARRIS
Member
posted June 05, 2003 06:38 PM
Steve-

When you say a tall deck block, do you mean a 9.325 deck? Is this necessary because of the stroke?

Would a light weight crank (43-44lbs.) be best for this configuration?

sdhnc29
Member
posted June 05, 2003 07:27 PM
It's best to use the 9.5" block . dirtbuster is correct about the block supplier . The Dart Iron Eagle is used if you need to run a steel block , and the Aluminum tall deck block is also available if you can use an aluminum block . Both block's are also raised cam block's (the cam has been moved up in the block , requiring special timing component's) , and have spread pan rail's (requiring a oil pan just for these block's). A few reason's for the tall deck , raised cam block is for cam clearance , and so you can put a long enough rod in the engine to get a decent rod stroke ratio .

As for crank's , 43-44 lbs is way too light !!! I know there are a couple of crank manufacturer's selling these 4" stroke crank's that are as light as you speak of , but they are extremely short on life span . I'd want to use a crank that is around 50-55 lbs for this application , 400 mains and 2.100" rod's , unless money was of no importance . Even at 50-55lbs with the big main's and rod journals , these combo's are not a long life deal . They like to crack/break at the parting line/overlap between the main and rod journal .

If it's done right (using the right part's , and no Chinese stuff) , this is a fairly expensive engine to build . Unless your running on a 1/2 mile , hooked up race track , I would not build this combination . There are very few track's where this combo could be put to good use . In my opinion , I would not go larger than a 3-7/8" stroke (still using a tall deck block). Even they can't be put to good use most time's , but the crank life is a little better than the 4" .

Steve

------------------
Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


The Rascal
Member
posted June 07, 2003 09:54 PM
Well put Steve! Especially this part:

I would not go larger than a 3-7/8" stroke (still using a tall deck block).

Rascal

------------------
Race the TRACK...not the dyno...


rocket36
Member
posted June 11, 2003 12:41 AM
you definitely won't get bigger than 421 cubes in a factory block, even then you have to grind the bottom of the cylinder walls and pan rails for rod clearance.
I believe that the old "rocket" block also has the raised cam and spread pan rails, but I don't know if you can get a 4.00 crank in them. We run a factory 400 plus 40thou with a 3.8 crank to make 415 cui and it runs fine in our late model (7500rpm) but we had to grind the block and the rods just to get it in and turn over. The cost of build this type of engine though is huge. 400 parts a much more expensive. I think I'll be going 383 next time.


Tech
Member
posted June 23, 2003 07:34 AM
We built one of those HOG motors, (useless) we used a Tall deck Dart block, 2.2 sb2 heads the only place we could get the timeing set was Wetsmyer & Shaver (spelling) piston speed in these things is unreal! made great numbers torque and horsepower but useless!!


rocket36
Member
posted June 23, 2003 09:41 AM
has anyone ever tried using the aluminium gen 3 engine in a dirt late model??


Back to the Archives