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Grinding for stroke clearance with 4.5" crank
#183698
01/04/09 02:20 PM
01/04/09 02:20 PM
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Joined: Aug 2005
Posts: 759
Southington Ct.
turbobitt
OP
super stock
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OP
super stock
Joined: Aug 2005
Posts: 759
Southington Ct.
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How much grinding is to be expected for a chevy journal 4.5" stroke crank in a world products block ? Just wondering how much I will need to take off the bottom of the cylinders.
Thanks.
1970 Challenger w/572 Hemi street car and my pride and joy.
1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno.
1976 Cee Bee Avenger Jet Boat - 460 Ford powered.
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Re: Grinding for stroke clearance with 4.5" crank
[Re: turbobitt]
#183699
01/04/09 04:24 PM
01/04/09 04:24 PM
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Joined: Dec 2008
Posts: 1,200
UK
602heavy
pro stock
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pro stock
Joined: Dec 2008
Posts: 1,200
UK
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If it helps any i had to clearance around .080 thou for a 4.625 crank on a megablock with chevy journals , was left with around .050 rod bolt to cylinder clearance (K1 rods)
Last edited by 602heavy; 01/04/09 04:25 PM.
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Re: Grinding for stroke clearance with 4.5" crank
[Re: 602heavy]
#183700
01/04/09 04:28 PM
01/04/09 04:28 PM
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Joined: Jan 2003
Posts: 19,355
Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,355
Las Vegas
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I did not have to do any grinding for stroke clearance on my World block with a 4.5" stroke Bryant crank. I had to do very minor grinding to the bottom of the bores to clearance for the aluminum rods however.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Grinding for stroke clearance with 4.5" crank
[Re: Cab_Burge]
#183702
01/04/09 10:07 PM
01/04/09 10:07 PM
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Joined: Aug 2005
Posts: 759
Southington Ct.
turbobitt
OP
super stock
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OP
super stock
Joined: Aug 2005
Posts: 759
Southington Ct.
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Rods and crank are K1 steel. Just looking for a rough estimate on what to expect.
1970 Challenger w/572 Hemi street car and my pride and joy.
1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno.
1976 Cee Bee Avenger Jet Boat - 460 Ford powered.
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Re: Grinding for stroke clearance with 4.5" crank
[Re: Bob_Coomer]
#183704
01/05/09 03:07 AM
01/05/09 03:07 AM
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Joined: Jan 2003
Posts: 19,355
Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,355
Las Vegas
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You should be fine and not require any clearancing at all. But with all things mock it up first.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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What type of rods, steel or aluminum? Steel rods can live with .030 or larger, aluminum needs more. Follow the rod makers recommendations on how much clearances on the rods and the piston to head clearances 
A race motor is way better off having a little more clearances than needed on any parts the move than having not quite enough 
