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The Infamous 270ci stroker crank??? 

 

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 Post subject: The Infamous 270ci stroker crank???
Posted: Fri Jan 15, 2010 10:44 am 
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The Infamous 270ci stroker crank

EF falcon crankshaft, offset ground 120thou and machined to a 2" big end journals to take a 6" chev 6cyl rod and re-sized 200 rod piston (suit E-series or crossflow 86DA block

Anyone know anything about this sort of combo???

 

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Last edited by MICKYYYY on Fri Jan 15, 2010 1:51 pm, edited 1 time in total.

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 Post subject: Re: The Infamous 270ci stroker crank???
Posted: Fri Jan 15, 2010 12:52 pm 
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Not off the top of my head. Wouldn't you need to notch the crap out of the bottom of your bores just so the crank can spin?
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 Post subject: Re: The Infamous 270ci stroker crank???
Posted: Fri Jan 15, 2010 1:53 pm 
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Heard of these in crossflows. Seen some in Street Fords. But as for the 4L.... i wish.

 

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 Post subject: Re: The Infamous 270ci stroker crank???
Posted: Fri Jan 15, 2010 2:07 pm 
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You do but apparently its minor when using a 6" chev rod and chev piston

I wonder how this engine combo will rev???

I know this combo has been only done to 250ci crossflow engines but havent read anyone doing it to a EF or AU engine

 

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 Post subject: Re: The Infamous 270ci stroker crank???
Posted: Fri Jan 15, 2010 9:27 pm 
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MICKYYYY wrote:
You do but apparently its minor when using a 6" chev rod and chev piston

I wonder how this engine combo will rev???

I know this combo has been only done to 250ci crossflow engines but havent read anyone doing it to a EF or AU engine



there is no reason you can't do it. considering the people are fitting EF/EL cranks and rods in to crossflows. the big ends are the same. the only problem is the crossflow block is taller then the OHC block. so you can't use the same pistons as you would in a cross flow.
Add to that the OHC engine wont have the Rod to Cam clearance issues that the crossflow has with that combo.

notching the bottom of the bore isn't a problem, near on every stroker V8 has the bores notched to some degree

 

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 Post subject: Re: The Infamous 270ci stroker crank???
Posted: Fri Jan 15, 2010 9:42 pm 
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tickford_6 wrote:


there is no reason you can't do it. considering the people are fitting EF/EL cranks and rods in to crossflows. the big ends are the same. the only problem is the crossflow block is taller then the OHC block. so you can't use the same pistons as you would in a cross flow.
Add to that the OHC engine wont have the Rod to Cam clearance issues that the crossflow has with that combo.

notching the bottom of the bore isn't a problem, near on every stroker V8 has the bores notched to some degree


Remember the ol 235 strokers.....221 Ford crank into a 202 Holden. Had to notch the pan rails and blocks on them, and I think, the cam too.
A bloke I knew years ago had a stroker VW 1600 twin port, it was using Holden conrods, off-set ground crank-pins ( had counter weights added too ), and a 92mm or 94mm bigbore kit. It was 2.0lt.

 

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 Post subject: Re: The Infamous 270ci stroker crank???
Posted: Fri Jan 15, 2010 11:29 pm 
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From what i know the same chev 6" rod and chev piston will fit into the EF engine block and if thats the case then this would be a great stroker engine.

Apparently 120 thou has to be machined off the crank which im not sure about but after a few number crunching i think u can get the chev rods and pistons with all machinging done for under $2500.00, which is no bad value if u really think about it.

 

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 Post subject: Re: The Infamous 270ci stroker crank???
Posted: Fri Jan 15, 2010 11:38 pm 
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MICKYYYY wrote:
From what i know the same chev 6" rod and chev piston will fit into the EF engine block and if thats the case then this would be a great stroker engine.

Apparently 120 thou has to be machined off the crank which im not sure about but after a few number crunching i think u can get the chev rods and pistons with all machinging done for under $2500.00, which is no bad value if u really think about it.


yeah thats pretty good if u are planning a rebuild anyway...

the rods...r they chev V8 or 6? no idea where ud get 6 cyl rods

 

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 Post subject: Re: The Infamous 270ci stroker crank???
Posted: Sat Jan 16, 2010 12:06 am 
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well its been done on the 250ci motor

need to know for the 4.0 and 4.1

deck heights
rod lengths
journal sizes
stroke
bore

if theyre similar its very do-able

 

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 Post subject: Re: The Infamous 270ci stroker crank???
Posted: Sat Jan 16, 2010 12:16 pm 
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I believe there a V8 chev rod but i read that its a 6cyc chev rod

An engine like this would scream in a cortina and with 270ci with head work and a decent cam size which is still nice and drivable would make the 200rwkw mark pretty easy

 

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Last edited by MICKYYYY on Sat Jan 16, 2010 12:21 pm, edited 1 time in total.

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 Post subject: Re: The Infamous 270ci stroker crank???
Posted: Sat Jan 16, 2010 12:19 pm 
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theres heaps of different rods that are used on the 250 conversion....datsuns and chevs seem common

 

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 Post subject: Re: The Infamous 270ci stroker crank???
Posted: Sat Jan 16, 2010 12:37 pm 
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some quick research has shown that 4.0 and 250 strokes are the same as well as the bigend size...

the 250 has about 60 thou bigger pistons

 

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 Post subject: Re: The Infamous 270ci stroker crank???
Posted: Sat Jan 16, 2010 12:45 pm 
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i think they use hemi 6 rods in them too from memory..

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 Post subject: Re: The Infamous 270ci stroker crank???
Posted: Sat Jan 16, 2010 1:07 pm 
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anyone know rod lengths for the 250 and 4.0?

also need to know if they have the same deck height...

 

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 Post subject: Re: The Infamous 270ci stroker crank???
Posted: Sat Jan 16, 2010 1:22 pm 
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