your basic 2 bolt main big block 454 block a 6.135 i beam rod a 4.310 10cc dome piston a steel crankshaft with a gm logo and part number to make a 496 cu inch since gm only makes a 4.00 inch stroke crankshaft how does one make a 496 with a crank with a gm stamp on it???? they say they dont make a 4.250 stroke crankshaft. wouldnt this be a 468 at best? or is the motor in question owner just telling lies so he can kick it with the big boy,s? or did i miss something.?

...sigh...

Is it possible that this question came from the same guy(?!?) that is building a 701 cube engine that will make 800 lbs torque at idle - BEFORE the supercharger?

Thomas

Mine is indeed a 4.25" stroked GM stamped PN crank BUT Lunati welded it up and then machined it back to the 4.25" stroke!!

That's how!!

Unless GM still sells raw crank forgings that can also be turned to 4.25"??

pdq67

This motor sounds like a 468. Check the stroke of the crank.It should have a 6.385 rod.Is this a speedomotive kit?

so you are saying that the cut the journals for the rods lengthened the cranck throw on the journals then welded the crank back together and mailed it back to you? according to gm they make no such crank and the people at holley lunati dpt told me they have never made a gm craNK INTO A 4.250 STROKE for anyone that its not possiable to do it and they dont know why anyone would. yes i am building a 706 cubic inch motor with a 6.25 bore and a 5.250 stroke i have been doing this for many years and never heard of no crank being torn down and rebuilt with 1/4 inch more stroke especially when gm say,s they make no such crank that to tear up the journals add material then re weld the joutrnals to lengthen them would be at best a wobbly wobbly weak crank.. would love to see pic,s of a measured gm forging showing 4.250 stroke.

give me a few days to dig through my 14 book boxes scatter them aroundf the house and i will tell you wich article i am gonna do a build copy on to acheieve the same or close to the same results of the big inch torque monster motor its oin the cover 800 ftlbs at idle

6.25" Bore and 5.25" stroke=1288.55 cu. in.
6.25" Bore and 4.25" stroke=1043.11 cu. in.

Where does the 706 come in with any of these numbers?

Bore/Stroke

5.142 X 4.25= 706ci
4.625 X 5.25= 706ci

or

6.25 X 2.88 = 706ci, hehe, that one sounds fun.

Originally posted by zl-1madness:
so you are saying that the cut the journals for the rods lengthened the cranck throw on the journals then welded the crank back together and mailed it back to you? according to gm they make no such crank and the people at holley lunati dpt told me they have never made a gm craNK INTO A 4.250 STROKE for anyone that its not possiable to do it and they dont know why anyone would. yes i am building a 706 cubic inch motor with a 6.25 bore and a 5.250 stroke i have been doing this for many years and never heard of no crank being torn down and rebuilt with 1/4 inch more stroke especially when gm say,s they make no such crank that to tear up the journals add material then re weld the joutrnals to lengthen them would be at best a wobbly wobbly weak crank.. would love to see pic,s of a measured gm forging showing 4.250 stroke. =
Since it's a nice quiet day & this is more fun then TV I guess I'll go ahead & answer this graemlins/clonk.gif

Well kid,,,
You probably need to tell all the older TF & AF driver guys like me how this ain't possible when the last front engine AF car I drove was a 1/2" 392 with a welded stroker & the one before that was a 5/8" 354 :(

For your info before there ever was an aftermarket crank almost all strokers were welded cranks including GM's so it is very possible.

As it happens in this case, it is probably not a stroker as welded deals are hardly ever used any more.

exactly my point they would rather sell you a cranck then custom build one them cranks are a thing of the past and almost very rare and no one sells em for cheap eaither

Originally posted by zl-1madness:
exactly my point they would rather sell you a cranck then custom build one them cranks are a thing of the past and almost very rare and no one sells em for cheap eaither =
Hmm, I must have missed that point as I thought your point was & I quote:

"so you are saying that the cut the journals for the rods lengthened the cranck throw on the journals then welded the crank back together and mailed it back to you? according to gm they make no such crank and the people at holley lunati dpt told me they have never made a gm craNK INTO A 4.250 STROKE for anyone that its not possiable to do it and they dont know why anyone would. yes i am building a 706 cubic inch motor with a 6.25 bore and a 5.250 stroke i have been doing this for many years and never heard of no crank being torn down and rebuilt with 1/4 inch more stroke especially when gm say,s they make no such crank that to tear up the journals add material then re weld the joutrnals to lengthen them would be at best a wobbly wobbly weak crank.. would love to see pic,s of a measured gm forging showing 4.250 stroke. "

Guess I missed your "point" graemlins/sad.gif

ZL, the reason why I asked about your 706 engine is that I cannot understand why you care about this mystery 468/496. Who cares what his story is - can it run the number?

All I want is to see the video of your car with the locomotive in action! Let's see: 800 lbs tq at idle + supercharger boost = over 1,000 lbs tq just off idle is great for a boat or with large by huge slicks if by land.

Good luck, and I might suggest something less than a 6.25" bore size.

Thomas

And bore centerline spacing on a BB is----------------------------?
4.84in.
And, you're going to bore it how big?
I don't think so!

well first off my newe block has a max boer of 6.32 so it will be fine and wolfplace i seem to remember seeing some posts someplace where you recomended to bb485 who had a cracked block in his cam tunnel in his water jacket and you offered to sel him cement? and one for copo69 who had a crack in his main oil galley and you also offered him cement . so as a professional it is your practice to cement in critical areas that leak with cement? now that is a clown move ...

First, no BBC on this planet has a max bore capability of more than 4.625" give or take a little with a 4.84" bore spacing.

Second, Mike Lewis (aka wolfplace) has never to my knowledge offered anything but sound professional opinion unless there was cautionary advice to go along with it.

Third, it's probably a 468 as you originally thought.

First, no BBC on this planet has a max bore capability of more than 4.625" give or take a little with a 4.84" bore spacing.You mean pistons cannot overlap? :D graemlins/clonk.gif

Sheez... How can anyone claim to be an authority on the impossibility of welded strokers when they are building an engine with imaginary bore capacity? LOL

Originally posted by zl-1madness:
well first off my newe block has a max boer of 6.32 so it will be fine and wolfplace i seem to remember seeing some posts someplace where you recomended to bb485 who had a cracked block in his cam tunnel in his water jacket and you offered to sel him cement? and one for copo69 who had a crack in his main oil galley and you also offered him cement . so as a professional it is your practice to cement in critical areas that leak with cement? now that is a clown move ... Kid,,, you really need to change brands of whatever it is you are smokin :(

Patter has returned. Luckily, the word "bore" has several meanings.

Patter has returned.I thought it was Bain with a new project...

okay so i forgot the 4.632 bore jeez like none of you have ever misstyped a key and to think a miss spell got you all so worked up and people cal me a kid ha ha ha ha dont see me talkin do do to no one or acusing them of any thing most people with normal comon sense woulda said wow the guy missed the 4 4.632 cause if big blocks wont go that far then i guess im in trouble with a 4.500 on my 540 and considering most of you couldnt figure out that someone missed the 4 in 632 and no one had the brains to notice that i guess maybe your right ? 4.632 i stand corrected after reading all the chats posts and seeing i had a tpye o and no one caught it cept for the more female hormoned and began to snicker and not one of you had the integrity to say didnt you mean 4.632 god help me im surfin with albert einstein and crew ....

and just to keep one thing clear i do not nor did i ever intend any disprespect to any of you and since you al made a huge massive mountain outta my type o then hey sorry the type o brought out your better qualities no hassles were ever intended im excited to win 60k from the lottery and couldnt type straight . ask yourself how up in the clouds you would be if it were you that could winn some money and how it woul feel to build your dream motor i bet you would miss spell alot also . hell its been 3 weeks and im still shaky ..just so as you understand what a tpye o is 6.32/ correction 4.632. have a nice dya

Wow. 60K. Your first expenditure should be "Hooked on Phonics".

You missed the 4 a bunch of times. Your keyboard happen to be missing the key?

Seriously though, how can we KNOW that you made a typo? How can we KNOW that you're not some rookie mouthing off about a bore that can't possibly exist? All we can see is what you allow us to see through your writing. We cannot see your block nor hold a bore gauge inside it to measure your bore diameter.

Also, take it easy while you're typing and take your time to use puntuation. None of this is a personal attack, but if you come onto and Internet forum, it'll make it a lot easier for people to help you out if you make it easier to communicate.

I'll give you a pass on the multiple posts with the wrong bore size. Congrats on the $60k. Judging by your reaction it is a windfall the like of which you have never seen.

May I humbly suggest that you resist all temptation to blow the wad on a hot rod engine with a short lifespan. After the $20-$25 for a decent but not all out 706 you would then need a complimentary transmission, differential, etc. Then a full cert roll cage and sportsman licensing.

Seriously, when fortune smiles upon you make sure that other longer term needs of you and your immediate family are not overlooked.

I live well enough and have a few cars to play with. As happy as that has made me I am even happier that I have at times had the means to make a real difference in a family members life, as well as the charitable organizations that I believe in. I really believe in the expression "be sure to plant a few trees under whose shade you will never see". Sometimes its not easy to do, but I just think of found money like that as "not mine, but meant for something better".

Thomas

Originally posted by zl-1madness:
and just to keep one thing clear i do not nor did i ever intend any disprespect to any of you and since you al made a huge massive mountain outta my type o then hey sorry the type o brought out your better qualities no hassles were ever intended im excited to win 60k from the lottery and couldnt type straight . ask yourself how up in the clouds you would be if it were you that could winn some money and how it woul feel to build your dream motor i bet you would miss spell alot also . hell its been 3 weeks and im still shaky ..just so as you understand what a tpye o is 6.32/ correction 4.632. have a nice dya =
Kid,,
If you don't like being called kid then quit actin like one.
When you come on here & essentially tell someone that you called Lunati & Lunati told you there is no such thing as what the person told you they in fact had that's disrespect.

When you espouse things about advice I never gave that is disrespect.

If you want respect & advice the hot tip of the day is to first spell check your posts & two don't come off as a know it all by telling someone who has been around a few years they don't know what they are talking about.

If you got into the wacky weed & forgot what you posted about 10 posts back here is the direct quote:
so you are saying that the cut the journals for the rods lengthened the cranck throw on the journals then welded the crank back together and mailed it back to you? according to gm they make no such crank and the people at holley lunati dpt told me they have never made a gm craNK INTO A 4.250 STROKE for anyone that its not possiable to do it and they dont know why anyone would. yes i am building a 706 cubic inch motor with a 6.25 bore and a 5.250 stroke i have been doing this for many years and never heard of no crank being torn down and rebuilt with 1/4 inch more stroke especially when gm say,s they make no such crank that to tear up the journals add material then re weld the joutrnals to lengthen them would be at best a wobbly wobbly weak crank.. would love to see pic,s of a measured gm forging showing 4.250 stroke. =
This is what you posted to Paul & all he did was have the audacity to tell you he in fact had a welded stroker from Lunati.
That my friend is indeed disrespectful :(

This is what you posted about some advice I supposedly gave in case you forgot:
well first off my newe block has a max boer of 6.32 so it will be fine and wolfplace i seem to remember seeing some posts someplace where you recomended to bb485 who had a cracked block in his cam tunnel in his water jacket and you offered to sel him cement? and one for copo69 who had a crack in his main oil galley and you also offered him cement . so as a professional it is your practice to cement in critical areas that leak with cement? now that is a clown move ... =

Don't believe I ever told anyone to "cement a block" at any time??
I have given advice about filling blocks & I have given advice about how to save a block that has been ground on too much at the pan rails for a stroker with Devcon but in all honesty I have never really considered "cementing" one back together but what the hell,,, maybe you are on to something
there :(

Congratulations on your winnings & have fun with your new endeavor kid,,, whatever it may be :D

lunati did say they dont re do gm crankshafts to me but hey np problem and no im not goin cage and all that stuff just gonna let it twist up my ride a lil is all you know have some fun have most of the parts already the car in question has a custom built dr evil t 400 coan 38 to 42 hundred stahl currie 9 inch i already have intake carbs cams and heads but wanted somethinfg a lil bigger that dart 355 so i opted for pro topline 370 cnc so my build cost is hovering around 15 k since i will be doing my own weight matching and assembly and 275 for a block prep and finish hone so 20 25 k not that much no just gonna build a nice street motor is all you know for braggin rights and such he he . but hey you all treated me like i was still at home so ill fit right in just fine bring on the next victim just kidding

Where are you going to run with no cage? That 706 sounds like it'll get you going into the "no fly zone" without a cage at most tracks.

If you're gonna street race it, I'd pick a combo that would be easier to hook on an un-prepped street.

May you have more luck all your life.

(By the way, your posts are really hard to read. Punctuation and form, two things that make the English language much easier to read.)

Put about 50K into some nice, well thought out(and advised) diversified investments and retire a few years earlier. Pay off any outstanding bills(car, truck, credit card, etc) with the other 10K. If you have anything left over after that...build a nice 468 or 540 and go have some fun at the track.
Your grandchildren will thank you for all this someday.

Originally posted by SILVERSS454:
Put about 50K into some nice, well thought out(and advised) diversified investments and retire a few years earlier. Pay off any outstanding bills(car, truck, credit card, etc) with the other 10K. If you have anything left over after that...build a nice 468 or 540 and go have some fun at the track.
Your grandchildren will thank you for all this someday. Screw the grandkids build the p*ss out of it twist it in half and learn an expensive lesson... your grandkids will still love you!!!

not gonna race it just gonna have some fun and i found the magazine article and i stand corrected it was a mopar cough cough 900 cubic inch design motor and at idle it made 800 ftlbvs tq so i guess my memory serverd me incorrectly o woll guess i wont be seeing those numbers but i think i will live with what i end up with . darn and that sounded real good to at least in my head it did . lol .. and im not poor i have just never had that amount of money come to e for should i dare say free. alw3ays had to bust my butt for it so for now im gonna have a lil fun .

Kripes man, around here $7000 gets you 700 ponies. Another $1000 in NOS gets you 1000. If you spend more than 10K on a monster you can't control anyway, why ask anyone anything? Build a mild 572 or 632. It won't bore you. You wont be able to run it like it wants anyhow.

Or spend the 10K on a "real" ZL1. 4.5" bore and 3.76" stroke, a nice solid roller shifting at 7200. That one you will be able to run W-O-T once in a blue moon!

Go out and get a Donovan block and have at it. Use a GM 6223 or Callies 3.76 stroke and the 4.5" bore Dono block.

{edit}
:rolleyes:

[ 11-30-2004, 04:50 PM: Message edited by: Dean ]

800 ft-lbs at idle?


Maybe it idles at 4000 rpm? :D

zl,

Just try to ignore the folks that want to be a little harsh or make fun of your spelling and grammar.
redface.gif

You will get some good advice here but we have to be able to communicate to know what you mean.

You really should read your post back to yourself and see if it makes sense before you hit the submit button.
In fact you can click on the little edit pencil icon above your post and edit it as many times as necessary.

You can also go to http://www.iespell.com/ and download a free version of iespell to spell check your posts even after hitting the submit button.

okay just take me out back and shoot me . so sometimes i type a lil faster in my head than my old rickety fingers will move .. just burn me at the steak. !

Chill out man. Granted, 540cutlass was a jerk with those comments....

But I, as well as others were offering advice so that you could communicate better with us. Some of your comments about your dream engine were way out of the ball park, there are rookies here (like me) that read some of those comments. The pro builders and racers know what is what, but us rookies can easily be mis-lead by mis-information.

You did also out-right attack some knowlegdable people, so you had the "kid" comments coming to you.

Anyway, welcome to the Team Chevelle forums. Great place to hang out. The members are pretty civil but they will point out B.S. when B.S. is there to be pointed out. Other than a few heated arguments, this place is pretty level-headed. Once again, Welcom to TC.

In my post above that was deleted. For the benifit of those that did not get to read it I said. " Can you believe he wants to bore that much." The only difference was that I misspelled every word. Was that so bad? My post got deleted, but some other member can call me a "jerk" and that post stays up. Then he goes on to act like he is so PC.

what ever people and you call yourselves grown adults.? wish i had no buisness to run and could sit around all day and complain about people misspelling words and rag on them like i was an ol lady. geesh get over the spilt milk and move on

zl,

I have never involved myself in these kinds of threads, but I feel compelled to reply. Your typos or mispelling are not the issue. In your communications, you come off sounding belligerent (whether you mean to or not). Just tone down the attitude and I'm sure you'll get all the good advise this site has to offer.

Regards, Kevin

540cutlass, No offense, but when all you can offer to a discussion is to outright make fun of someone without putting any effort into helping them understand why they are being ridiculed, that as, in my book, being a jerk.

If you don't agree, I appologize.

Yep, absolutely

No one deserves for another person to make a post just to make fun of them and that's exactly what it was.

Since this has 40 something posts and no one has answerd his question of 468 or 496 I will.Yes you can custom make a crank,if bore is 4.310 that=60 over and rod length depends on piston 6.135 or 6.385 will work rods have nothing to do with stroke or bore. Hope this helps.

sometimes its best to keep your mouth shut and your hood down than to poke all out loose and get clowned . !!!

No mean hartedness was meant in my original post. I was tring to lighten up the post ( my mistake) No offence was meant. Sometimes an attemt at humor fails. You have to know my since of humor I guess.

no problem guys like i said its like being at home dont laugh im serious . and thanks bb485 for the info...