Chevy Inline 6

[Josh Lee]

Does anyone know if Chevy inline 6 (194, 230, 250, 292) came with a forged
crank? Thanks in advance.

[Frank Austin]

"Josh Lee" <g...@qnet.com> wrote in message
news:tmcdd2n...@corp.supernews.com...

>
> Does anyone know if Chevy inline 6 (194, 230, 250, 292) came with a forged
> crank? Thanks in advance.
>
>

I know the Ford 300 incher did (as well as the pistons and rods) and I
believe the 292 Chevy crank was also forged. The manufacturers did it
because they were standard equipment in the full size pickups and as such
were expected to survive a hard life. These two along with the Chrysler 225
slant six were about the toughest engines ever made in the US. You really
have to work at it reasonably hard to break one.
Frank

[Rufus T Firefly]

194 to 250 were all nodular iron. I'm not 100% sure on the 292 but I think
it was iron also. Since these engine have a main bearing on each side of
each rod journal they are a relatively well supported and the main webs stay
straight and the crank flexes very little. For most street and mild racing
build ups the stock crank won't give you any trouble. Just make sure to
have it checked for cracks etc. There are forged aftermarket cranks around
if you really feel you need one..
Try www.cliffordperformance.com for more info on these inliners.

Mike ( Anti Spam Address )

"Opportunites are spawned from crisis"
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Josh Lee <g...@qnet.com> wrote in message
news:tmcdd2n...@corp.supernews.com...
>

[J Forbes]

Rufus T Firefly wrote:
>
> 194 to 250 were all nodular iron. I'm not 100% sure on the 292 but I think
> it was iron also. Since these engine have a main bearing on each side of
> each rod journal they are a relatively well supported and the main webs stay
> straight and the crank flexes very little. For most street and mild racing
> build ups the stock crank won't give you any trouble. Just make sure to
> have it checked for cracks etc. There are forged aftermarket cranks around
> if you really feel you need one..
> Try www.cliffordperformance.com for more info on these inliners.
>
> Mike ( Anti Spam Address )
>

There are two variations of 292 crank, one has the
normal single dowel and 7/16" bolts, the other has 3
dowels and 1/2" bolts. Perhaps they also used steel
cranks in some of them? Chevy liked to do that with
heavy duty truck engines...which the 292 was.

Jim

[Rufus T Firefly]

Entirely possible there were some forged 292 cranks but if he is thinking of
using one in a 250 or smaller engine they just won't fit. The much longer
stroke of the 292 made it necessary to cast a taller block for those
engines.

While we are mentioning swapping parts Josh may be interested to know that
piston swapping in a 250 is probably best done with pistons made for the
250.
Although it has the same bore as the old 283 the pin height is all wrong.
The closest Chevy V8 piston is a 307 but the pin height on those pistons is
higher and will move the top of the piston down in the bore by .040" @ TDC.
These are flat tops and the 250 have a D shaped dish that is a nominal
.062" deep so the overall change in compression may be slight if any.
Once I discovered that I didn't bother to go any further with the 307 slugs
so I don't know if the change in pin height or the length of the skirts or
both for that matter interferes with the crank at BDC. At the time I was
only interested in a way to raise the compression with an off the shelf
piston swap.

--

Mike ( Anti Spam Address )

"Opportunites are spawned from crisis"
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J Forbes <jfor...@yahoo.com> wrote in message
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[Josh Lee]

Well I am planning on building a 257, .060 over 250, to race. I found a
company Sisell (I think that how it is spelled) that just starting casting
their own aluminum head and it's very nice. I don't want to spend $1200+ on
a aftermarket crank, as Scat makes them. I planing 7000 or so RPM, so I
wanted to lighten the crank up more then anything, but keep it strong enough
not to flex. I have a stock crank and it's to heavy for my personal
preference. Federal Mogul makes pistons for them, it is a different part#
than a 307. I think (I'll have to check) that they even have a flat top and
a dome sets available. I know of some comp eliminator guys who went all the
way to a 4.030" bore, and used two 18 degree heads cut then welded up
together to make one 6 cyl. head.
Thanks for the info.

Rufus T Firefly wrote in message ...

[Rufus T Firefly]

Sounds like an interesting project but from what I have researched so far if
you want to see 7 grand more than once then you are going to have to spend
the money for a crank and good set of rods. Just curious Josh, what is the
price on that aluminum head? Kay Sissel ( Sisell ) has been around doing
inlines for a long time, almost all for competition so they should have
reliable info and products.

--

Mike ( Anti Spam Address )

"Opportunites are spawned from crisis"
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Josh Lee <g...@qnet.com> wrote in message

news:tmhhd26...@corp.supernews.com...

[Josh Lee]

After talking with Sissel today they said that they haven't had any problems
with the cranks and I was planning on getting rods. However I'm still
researching this project, so I haven't got to far. I know with the SBC stuff
that I've done (street/strip) I have yet to have a problem with a stock
crank, as long as you go over it (magnaflux, line hone the block, etc.), and
deburr it (help eliminate stress risers). I have one that goes 7000 weekly
and has about 20,000 miles on it, with stock rods. As for the head it was
about $1700 I think. I don't mind spending the money on good parts
especially if it a set of good heads, but I still would like to save some
money just like everyone.

Rufus T Firefly wrote in message ...

[Rufus T Firefly]

Keep us posted. I'm doing a warmed up 250 for a 37 Chevy street rod, Muncie
4 speed, etc. Might be fun to compare notes and problems as we go. One
thing for sure it won't get a $1700 aluminum head!!!

--
Mike ( Anti Spam Address )

"Opportunites are spawned from crisis"

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"Josh Lee" <g...@qnet.com> wrote in message

news:tmk4sep...@corp.supernews.com...

[Eugene Blanchard]

Here's some links to Chev inline 6 resources on the net

http://www.inliners.org/
http://www.stoveboltengineco.com/main1.html
http://www.cliffordperformance.com/home.htm

I was hoping to get my hands on a late 60s Pontiac OHC 6 called the
Sprint. Here's the info that I found:

http://www.cadvision.com/blanchas/54pontiac/sprint-codes.txt

Here's a performance build-up of a 292 cid engine by truckworld. Lots of
good info and pix:

http://www.truckworld.com/How-To-Tech/Chevrolet-Engine/Chevy-engine.html
http://www.truckworld.com/How-To-Tech/Chevrolet-Engine/Chevy-engine-2.html
http://www.truckworld.com/How-To-Tech/Chevrolet-Engine/Chevy-engine-3.html