|08-06-2010 08:20 AM|
460 to a 496 is worth about 8% more power. (if the heads are up to it)
in general a 460 cid bbc with 450hp/500 ftlbs will go to 486/540ftlbs with a 496.
|08-05-2010 09:57 PM|
|08-05-2010 04:19 PM|
|ribmaster||only cost me 572 dollars more to get the rings so i figure why not. now im worried bout the cam again|
|08-05-2010 04:16 PM|
|ribmaster||i double checked and the pistons r a .60 overbore vs the 30. i would rather have a fresh bore and the machine shop said it would be close with all the test he done on the rings and such i dont know what all they do. i just know i would rather have new pistons and rings than something thats allready got wear on it.|
|08-05-2010 05:28 AM|
Eric (or anyone w/an answer), I know honing isn't boring, but what's your thoughts on torque plate honing a worn 0.030" over BBC cylinder to 0.040"?
I realize the usual amount to be honed is much less than that, and also I'm thinking the hone wouldn't be capable of removing taper that might be present in a worn cylinder, but then I'm not a machinist.
Doable or not advisable, or?
What is the smallest practical amount that can be bored?
|08-05-2010 01:35 AM|
|ericnova72||At .030" overbore it makes a 489 with the 4.25" stroker crank. If bore is fine at .030 then use it, no sense boring more than you have to.|
|08-04-2010 11:44 PM|
I haven't yet seen a BBC that wouldn't take a +0.100" bore. (4.350" bore with a 4.250" crank makes a 505.)
|08-04-2010 11:28 PM|
|ribmaster||Do u happen to know the bore on the 496 stroker I'm allready 30 over . I might not be able to do a 496|
|08-04-2010 11:02 PM|
Cam doesn't sound like a bad choice, rpm range will be a little lower due to increased cubes, like 2500-6500 rpm.
|08-04-2010 10:37 PM|
|ribmaster||Street and strip kinda like a fish and ski boat lol that's why I wanna keep the cp down. The cam range is from 2800 to 6800 .just wondered if the stroker would give it more low end torque since my intake runners are big and ill lose some bottom end|
|08-04-2010 10:32 PM|
|08-04-2010 10:28 PM|
|ribmaster||Will cam selection change any? can I keep the 243 249 630 full rollar|
|08-04-2010 10:21 PM|
|ericnova72||Being a stroker doesn't change the octane requirements as long as the comp ratio is kept the same, at 10.5-ish and aluminum heads with a good chamber shape the AFR heads have it should be fine. The added cubes of the stroker is what makes the additional power. Cubic inches are always king, most serious BBC racers are using 540 or bigger, with up to 632 being pretty common now days for that very reason.|
|08-04-2010 10:07 PM|
|ribmaster||Useing afr 325 cc intake runners 115 cc chambers..will the cp being what it is matter with it being a stroker I can still run pump gass and have nore hp just making it a stroker vs just an over bore?|
|08-04-2010 10:02 PM|
|ericnova72||Overly simple answer is yes, all things being equal, 36 more cubes should almost automatically get you at least 36hp, and more like 45-60hp if this is a performance build. Just make sure you have heads big enough to feed it, 90% of stock heads are not going to be big enough. Large Oval ports will need a lot of port work and bigger valves, or use Rectangular port heads on an engine this big. GM uses Rectangle ports on the hottter 502's that they offer.|
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