Inliners International Forums General Discussion Hi Performance 250 crank in a 194

I have a 194 motor that I've made some upgrades to, namely, a Sig Erson cam of 256 degrees duration/.480" lift, aluminum timing gear, screw in rocker arm studs, heavy duty valve springs,Isky steel retainers, hi-po oil pump, Clifford intake and long tube headers, Holley 350 cfm 2-bbl carb, 3-angle valve job, and Mallory distrubutor. Has anyone out there tried putting a 250 crank in a 194 block? If my math is correct, that should give a displacement of 215 cubes, and I don't think 250 cranks are all that expensive, but I've never heard of anyone doing this. Also, would I need new rods, or is it possible to use the 194 rods with a setup like that?

You may need custom pistions. Because of the stroke difference. Check the piston to deck clearances.

I have a 250 crank & camshaft on hand if you want to fool around with this idea. Let me know.
Edwin

I remember a friend who had a Pontiac Tempest with a 215" six. Maybe a '65 or '66? I think you'd need to use new pistons from this 215" motor. Might be easier if you've got a good running 250 short block and stick the 194 head on it.

if i remember correctly, the tempest 215 ran the same stroke as the 194 and 230, with a different bore. wanna say the bore was 3.750". so, 215 pistons wouldn't work in a 194.

i must say, i've considered throwin a 250 crank in my 194.... someday.

bucky

A long time ago I thought of this.
I wrote to Clifford's and Jack himself answered.
It takes a different piston for the same reason 230's and 250's take different pistons: pin location.
It might be better to prepare a 230 or 250 short block and then transfer all the good stuff off the 194. I think you get to keep all the big money stuff you named.
I ran a 194 for years in a 64 Chevelle and should have listened to the same advice:
ditch the 194 for a 250.
You're missing out on 35HP starting out,
194 = 120HP and 250 = 155HP
Someone correct me if I'm wrong:
194 - 250 uses same length rod?
194 and 230 is same stroke so crank would work but need balanced?
If this is for a Nova you might have to find a block with dipstick hole drilled for forward sump. I've seen some blocks with a spot where the hole would be, I'm assuming any machine shop can drill a dipstick hole.