I just got my hands on a dirt cheap used 502 short deck and i was wondering is its strokable? not like the engine isnt big enough i would just like to know how big can i go . The 502 has a 4" stroke and the 496 stroker crank is 4.37 now can i put this crank into the 502 and bore it .03 with that bore/stroke I should be able to get 555ci. So my quention is, will there any broblems with stroking the 502 for any reason besides the custom piston, is there room in the block or will i have to clearence it like when doing a 383, do they usualy have to clearence the bb 454 to 496 strokers? Has anyone ever seen or heard of this done before? Thanks. Eric

 

I know GM just came out with a 572ci stroker crate motor. Might see what parts they used on it.... could be the same bore as yours.

 

50 ci's isnt going to make a difference if you add a turbo. If you slap a T88 on a 502 or a 555, they are both gonna be making huge power, but the turbo vs the NA engine will always make more power. Is this for a street or race car?

Both ways, you have over 700 hp easy, with 850+ tq from 3-65 grand rpms. So hooking this beast is the problem. Tell us your goals and purpose and we can help ya out much more.

Hunter

 

I know that the turbos will make way more power and alot more torque and i already have a 76m turbo laying in my basment that can get the 502 into the 9s in m truck one i get the rear and chassis worked to handle it. I just wanted to see "how big i can go" I love to do stuff diffrent hence building the 267 insted of one of the 3 350 blocks I have. The engine would be for a strip/street engine for my daily driver s10 but i will be swaping the BB and t400 for my mileage monster twin turbo 267 chevy v8 and 700r4 for the weekdays.

My truck will weigh around 3150 with the BB so traction shouldnt be a huge problem once i get a 4 link hooked up. I already notched and tucked the frame to fit 12" tires and thats for the sb (overkill is better than underkill)
so when im installing a 4 link in place of the truck arms im putting in curretly i will clear it for some more tire.

The 572 is a tall deck and mines short look here and save this on your favorites it always comes in handy http://www.mortec.com/borstrok.htm

the extra 50 cubes would help if im going n/a because i can just get a biger cam to kil some low end (still more then the 502) and make monster power up high 650 hp was an extremly modest an dmore like 800 would be around the actual outputs, turbo being higer.

I would like to run as fast as possible hopefuly at least 9s and i'd be estatic if i ran 8s. Also i want to be the king of the streets at the local street races with the bb. i would prefer keeping the stock forged internals and not having to upgrade to H beams to handle the rpms thats another reason for the stroker so i dont hav to rev it as much.


Eric Myers

 

turbo0racing-

I am pretty sure you can fit a 4.5" stroke in teh 502 with proper clearancing. The 4.37 should be fine. If ya look at I think it was last month HOT ROD, there was a 705 stroker big block in a 69 Camaro.....now that was cool!!!

Hunter

 

502 ci is based off a bbc block. bore & stroke determines the cubic inches. all bbc based block can be made to whatever size you want to acomplish depending on the crank & bore . cranks are availible from 4.000-4.250. rods are availible from 6.135-6.535. you can build a 509-540. most strokers will need to be clearance due to the larger crank & rods : )

 

I’m not sure I see the point. If you want 9’s in an S10, the 502, built up right without turbos will get you there, without even revving in excess of 6K rpm.

Stroking the thing with a crank that will hold more power will cost you much more then you paid for the engine and won’t really do anything for you but move the powerband down to a lower rpm increasing the traction problems that you’re going to have with that light chassis and any streetable rubber.

You’re not going to do much to it that will get you any usable power without spending major $$$ (like replacing just about everything inside the block + the heads so that you can build it to handle higher rpms to kill some of the low end torque).

I don’t know that you’ll get any great answers around here because you’re diving into the realm where only $$$$ race cars go since really, a larger engine will only result in more unusable torque or major expenditures to make it live at high rpm’s.

 

Yes it is, a 4.250 crank (shaft) will go in fairly easily, I am fairly sure a 4.500 will go also, Big $$ shafts tho'.
Btw a 496 is a .060 over 454 with a 4.250 shaft. I am not to familuar with the 502 block, flatlanderracing.com lists a 4.500 shaft and a 502/dart block, with a bore of 4.625 to make a 604 BUT i highly suspect that if you were to bore a 502 block that far you would have to either fill it to the deck with hard block or not have enough cyl wall "meat" . Dart merlin II blocks will go that far but I think thats all. filled blocks are only for the track with limited run time. NO street use as they are unable to cool properly.
You would have no problem making 700 hp with a 4.250 shaft and that block. I'm building a 540that makes over 800 and it is not too wild as I will drive it on the street, I'm looking to go 9's in a 3200 lb car. The price seems to go way up on strokes over 4.250 tho..........

 

Thanks guys. I decided that i dont think im going to make a 555. This is due to many reasons pointed out mainly price and that my 9 second goal can be achieved with just bolting on turbos. So im going to keep teh 502 as a 502 install new bearings, freeze plugs, and bolt on my 76mm turbo .

Hopefully dip into the 8s once i put forged pistons, h beams, new solid roller cam, and port the heads later on down the road.

Thanks

If anyone has any more info on BIG big block strokers keep writing and share the knoledge

 

Hey Eric, what 76mm turbo did you get your mitts on?

 

you are going to tear up deer park ave huh

you wouldn't happen to be that guy with a 502 in his camaro would you?

 

Here's the deal:

454 is 4.25" bore x 4.00" stroke

496 is 4.31" bore x 4.25" stroke

502 is 4.47" bore x 4.00" stroke

555 is 4.56" bore x 4.25" stroke
or 4.625" bore x 4.125" stroke

572 is 4.50" bore x 4.50" stroke

So stroking a 502 from 4.00" to 4.25" would actually make a 533, which is commonly bored out to 540ci (4.50" bore). Hope this helps.

 

Yeah, that damn thing has a deck height of 11.7 inches, . As for the specs on that motor, 705 CID, 4.600 bore, by 5.300 inch stroke, running a 7.75" rod. That is absolutely sick and disgusting.

 

The 76 mm is a Holset its from a mack(??). You see me spanking at DPA next summer in my s10 (they wont even know what hit them). No im not the guy with the 502 in his camro but i think i know who your talking about is it a 68 black 10.5 slicks and a 2" cowl the guy is ripped and in his 50s? Or is it the kid with a caged and tubbed 69?

705 ci is massive but that engine has no chance ofbeing a bit streetable, would do awsome at the strip though.

 

why not go 4.47" bore with a 4.375" stroke = 549cid

Or even better, give me the 502 block!