415 SBC stroker questions for ya!
Thread Starter
Drifting
Joined: Feb 2004
Posts: 1,277
Likes: 1
From: Santa Maria CA
415 SBC stroker questions for ya!
ok, i've gotta chance to get a very low mileage 415 stroker from a guy in a 69' stingray in my area. its got very low mileage and its not a 1/4 mile car but more of a cruzer and ocassional toy. has just under 6000 miles on it and it is mildly built with 200cc sportsman 2 heads and a small solid cam(230/240ish range). i can get the SHORT BLOCK ONLY which is what i want for cheap and want to know some specs on it like.....
he's not sure of its components in the short block which means im gonna have to check it out myself later but he says it has Keith Black Hyper's in it and just curious if KB makes a piston for that application?
rod lenght is 5.7" and he doesn't know the brand?
hes a nice guy but doesn't quite know everything and every part# like some of us do. would a 5.7" rod work and with what piston???
the crank he said was nodular iron and has a stroke of 3.850".no brand name given just said it was that stroke and that material.
what does and or doesn't make sense to alot of u engine specialists and builders? tell me what you need to know and i will ask the guy tonight when i go out at the local bench racing spot in town. thanks for any info.
he's not sure of its components in the short block which means im gonna have to check it out myself later but he says it has Keith Black Hyper's in it and just curious if KB makes a piston for that application?
rod lenght is 5.7" and he doesn't know the brand?
hes a nice guy but doesn't quite know everything and every part# like some of us do. would a 5.7" rod work and with what piston???the crank he said was nodular iron and has a stroke of 3.850".no brand name given just said it was that stroke and that material.
what does and or doesn't make sense to alot of u engine specialists and builders? tell me what you need to know and i will ask the guy tonight when i go out at the local bench racing spot in town. thanks for any info.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by SHINOBI-X
what does and or doesn't make sense to alot of u engine specialists and builders?
So, see? The numbers don't make sense. You have to blame that more on the seller than on what he is selling. If you like what you see, and the price is right, snap it up.
RACE ON!!!
Thread Starter
Drifting
Joined: Feb 2004
Posts: 1,277
Likes: 1
From: Santa Maria CA
thanks CFI. as always great stats and specs for engine combos.
1 more consern i have is about the external balance. he has a muncie 4 speed behind the engine so its got a flywheel and clutch. if i put on a stock 400 flexplate and drive it it might not be balanced anymore. If i have it bought and out of the car i might dissasemble it and see if the assembly can be interally balanced or at least rebalanced using a ext.flexplate. whatdaya think?
i will have a chance to see it in the next few months when he gets the motor yanked and i can go inspect it. if its really a 406 someone built for him and cheated him by telling him its really a stroker 415cid then i wouldnt' be totally smashed by that. i'd still really consider buying depending on the internals. if its a stock shortblock 400 with some cheap pistons then i'd be a little
i will definately keep up some posts about it when i get to see it and or buy it.
1 more consern i have is about the external balance. he has a muncie 4 speed behind the engine so its got a flywheel and clutch. if i put on a stock 400 flexplate and drive it it might not be balanced anymore. If i have it bought and out of the car i might dissasemble it and see if the assembly can be interally balanced or at least rebalanced using a ext.flexplate. whatdaya think?
i will have a chance to see it in the next few months when he gets the motor yanked and i can go inspect it. if its really a 406 someone built for him and cheated him by telling him its really a stroker 415cid then i wouldnt' be totally smashed by that. i'd still really consider buying depending on the internals. if its a stock shortblock 400 with some cheap pistons then i'd be a little
i will definately keep up some posts about it when i get to see it and or buy it.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Assuming it's externally balanced, just borrow his clutch and flywheel, and have a 400 flex plate balanced to match. Or use a 350 flexplate if you want to retain the 153 teeth. I am not saying it isn't a 415, it's just that all he has told you, doesn't add up.
RACE ON!!!
RACE ON!!!
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
415's are an excellant choice. EFI-CFI has the right idea. Just take the fly wheel down and have a flex plate balanced the same. I would also use a 168 tooth to help turn over a big inch motor. The only thing to watch out for is the compression. You need 15 -22 cc dished pistons in it depending on the head chamber cc to get the compression reasonable.
Thread Starter
Drifting
Joined: Feb 2004
Posts: 1,277
Likes: 1
From: Santa Maria CA
Gkull- CFI does have a good point,to save on cost i WILL consider that and do it. you'll see the posted topic very soon about the follow ups on this so called 415cid i will purchase. i would prefer to use a 7 1/4" ATI if i can get one in that size because i'd like not to mash down the crossframe in the front for clearance. either way it will work even if i have to modify it but i'd like to find a smaller,external balanced balancer. i've have a PRO-RACE balancer on my pontiac 455 for the past few years and all racing with no problems. i will keep my eyes out on other options though.
as far as the compression goes,the 415 owner drives it on 91 octane and says its not in need of a higher grade gas because he had it built for pump gas. IM PRAYING he knows what hes talking about and its not 11.1:1 comp with his iron heads!
i can't post pics very well but i will have a friend go with me to take pics and host em' online later so i can show everyone the shortblock and such. i will try to get the build sheet and part #'s or reciepts of all his parts to verify what it is.
as far as the compression goes,the 415 owner drives it on 91 octane and says its not in need of a higher grade gas because he had it built for pump gas. IM PRAYING he knows what hes talking about and its not 11.1:1 comp with his iron heads!
i can't post pics very well but i will have a friend go with me to take pics and host em' online later so i can show everyone the shortblock and such. i will try to get the build sheet and part #'s or reciepts of all his parts to verify what it is.
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Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by SHINOBI-X
Gkull- CFI does have a good point,to save on cost i WILL consider that and do it.
RACE ON!!!
