292 cranks as strokers for 289/302's


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By MarkMontereyBay - 12 Years Ago
I read that in the past, 292 Y block cranks were modified to stroke 289 and 302 SBFs. Wondering about the history of that and if the forged version crankshaft in heavy trucks were used.



Have been looking around on the web and found that Jack Rousch used a 292 Yblock crank to stroke the anemic 302 79 Mustang Indy Pace Car.
By PF Arcand - 12 Years Ago
The part about Rousch using a 292 crank for a SBF stroker in 1979 is interesting. Would be interesting to know more about that?
By Ted - 12 Years Ago

The forged steel cranks were used for the SBF strokers back when the only stroker cranks available for Small Block Fords were steel billet.  Once the aftermarket started making inexpensive cranks for the Small Block Ford, using a modified 292 truck crankshaft in the SBF just went away.  I thought I heard somewhere that the Indy SBF's used a modified 292 truck crank back in the Sixties.  Maybe someone can help to confirm this?

By Hoosier Hurricane - 12 Years Ago
Ted:

Maybe you were thinking of another project from Ford.  When they were going to provide an Indy pace car ('64 Mustang maybe) with a 289 they decided they needed more inches for more speed.  302s weren't here yet, so they stroked a 289 with a 292 crank.  I have an article somewhere in a Hot Rod magazine.  Maybe I can find it. 

By aussiebill - 12 Years Ago
Hoosier Hurricane (11/23/2012)
Ted:

Maybe you were thinking of another project from Ford.  When they were going to provide an Indy pace car ('64 Mustang maybe) with a 289 they decided they needed more inches for more speed.  302s weren't here yet, so they stroked a 289 with a 292 crank.  I have an article somewhere in a Hot Rod magazine.  Maybe I can find it. 

Just another use for worn journal 272/292 cranks here in Australia in the 70,s was to modify and stroke them to use in speedboats with local 308 ci holden V8 engines, common in local cars, these were done by Ken Waggot of Waggot cams, i know because they brought any cranks i had over the years, i dont recall what capacity they increased to but were popular. Regards bill.Smile

By PF Arcand - 12 Years Ago
This is interesting stuff.. especially so I can annoy some SBC afficonados with it. Anyway, a long shot thought, is it possible, that since the taller deck 351 SBFs, are from the same family of engines, as the 289-302s, could their cranks be modified to provide stroker cranks for Y-Blocks?
By Hoosier Hurricane - 12 Years Ago
Paul:

I looked into that, it would be too much of a project for me to undertake.  The 351 crank has too short a front snout, too short on the back end and has no flange to mount the flywheel.  Also, the center main thrust surfaces are .010 farther apart than the Y.  The 351C has the same thrust width as the Y, but still has the length problems at both ends.

By aussiebill - 12 Years Ago
PF Arcand (11/24/2012)
This is interesting stuff.. especially so I can annoy some SBC afficonados with it. Anyway, a long shot thought, is it possible, that since the taller deck 351 SBFs, are from the same family of engines, as the 289-302s, could their cranks be modified to provide stroker cranks for Y-Blocks?

I might be wrong but with all the theoreticall machining and adapting to make a used 351 crank into a substantial stroker, wouldnt it be cost effective to get new modlex crank or similar and know its right? Smile

By MoonShadow - 12 Years Ago
Aren't the Holdens the scrubs of down under? That means they used Y cranks to wake up scrubs? Wow! Chuck
By LordMrFord - 12 Years Ago
351's flange is just there where rear seal should be, so you have to to move flange (or replace to Y's flange) or machine the block's sealing area to get o-ring around the flange like SBF and make long adapter to flywheel. In both way it is very hard. Am I right?
By Ted - 12 Years Ago
LordMrFord (11/25/2012)
351's flange is just there where rear seal should be, so you have to to move flange (or replace to Y's flange) or machine the block's sealing area to get o-ring around the flange like SBF and make long adapter to flywheel. In both way it is very hard. Am I right?

Very right.

By aussiebill - 12 Years Ago
MoonShadow (11/25/2012)
Aren't the Holdens the scrubs of down under? That means they used Y cranks to wake up scrubs? Wow! Chuck

Chuck, thats right! On another note, we went to hotrod charity birthday bash on sunday and my young  daughter won a raffle prize while i was outside and turned out to be framed print of 55 ch**! i tried to sneak it out to car past friends but hey! whats that? came the cry and with bowed head i had to show them! Worst day of my life, caught with this!.Tongue

By Moz - 12 Years Ago
i just read your post bill & my eyes have fallen out & im now blind
By Glen Henderson - 12 Years Ago
Ted, if my old brain is working right this morning, I think I remember the late Richard Gaston talking about the early 60's Indy engines in one of his articles. But since the rules only allowed 255 cubes at the time they must have been used to destroke a 260 block and since Ford was deeply involved in this project there may have been extra block machining performed.
By Hoosier Hurricane - 12 Years Ago
Well, I found the article in Oct 1964 Hot Rod, and it wasn't what any of us thought.  Ak Miller was building a stroker 289, "just because".  Hot Rod reported on it, and Isky tested it on his dyno.  Crankshaft Company made the stroker by machining the rear flange and front snout to small block configuration, grinding the mains to size, and grinding the throws to 2" to fit the CSC's special rods with Olds 215 rod bearings.  Offset grinding was available to allow up to 352 cubic inches.  Apparently it worked well enough that CSC decided to market them.  It would be much more difficult to go the other way, putting a 351 crank in a Y. 
By Small block - 9 Years Ago
I gust came across this old post ,
I remember  Reading About  the  Shelby team using a 292 truck crank in both there AC Cobra and there GT40 cars,
These engines worked well but the extra stroke added stress to the 289 block causing Cracks in the main webbing.
They stated the engines were  ok for short races but they wouldn't last a 24 hour race like Lemans!
 The cranks   Shelby used were destroked to 3.25 stroke!    The information was quite limited  because
Shelby didn't want to many to know what  they were doing to make the cars competitive!
By NoShortcuts - 9 Years Ago
Hmmmm...  Interesting, Small Block.

THANKS for sharing that info.   Smile
By yalincoln - 9 Years Ago
say john, try the 63 indy article? not sure whitch magazine. I remember readeing about it.
By 2721955meteor - 9 Years Ago
Hoosier Hurricane (11/23/2012)
Ted:

Maybe you were thinking of another project from Ford.  When they were going to provide an Indy pace car ('64 Mustang maybe) with a 289 they decided they needed more inches for more speed.  302s weren't here yet, so they stroked a 289 with a 292 crank.  I have an article somewhere in a Hot Rod magazine.  Maybe I can find it. 

  I went threw some old info and found the artical(it shows 3 cranks 260.289 and the forged 292 and a pictur of? poss. jack himself. cliff
By PF Arcand - 9 Years Ago
There was an article many years ago about the 1964 (?) Ford Indy engines reprinted in Y-Block Magazine. I don't recall anything about the crankshafts being mentioned, but those SBF based engines, apparently used some of the upper valve gear from Y-Blocks, because the factory SBF upper ends were considered to not be durable enough for a 500 mile race. Apparently, some of the mods were put together with Isky involved..
By MoonShadow - 9 Years Ago
The event host should be arrested for "contributing to the delinquency of a minor". Your poor daughter could be scrub scarred for life.
By 2721955meteor - 9 Years Ago
PF Arcand (11/14/2015)
There was an article many years ago about the 1964 (?) Ford Indy engines reprinted in Y-Block Magazine. I don't recall anything about the crankshafts being mentioned, but those SBF based engines, apparently used some of the upper valve gear from Y-Blocks, because the factory SBF upper ends were considered to not be durable enough for a 500 mile race. Apparently, some of the mods were put together with Isky involved..

the artical was in regard to the mustang pac car,not for a race car. they felt that the sbford did not have enough power to run pce car laps. any interest i could fax the artical. cliff ct1940@shaw,ca
By PF Arcand - 9 Years Ago
O.K., the article was abreviated in YBM & may have been out of context. Thanks