Largest stroke in a ZZ4 short block?
Thread Starter
Race Director
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From: College of Charleston, SC
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Largest stroke in a ZZ4 short block?
When I am college, 2 years, I wanna go for more cubes. I have a ZZ4 short block in now and am wondering whats the largest stroke and bore I can go with.
Team Owner
Joined: Sep 2001
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: Largest stroke in a ZZ4 short block? (vettes rule)
go for a 396 or a 383
383: 3.75" crank and 4.030 bore
396: 3.875" crank and 4.030 bore
383: 3.75" crank and 4.030 bore
396: 3.875" crank and 4.030 bore
Burning Brakes
Joined: Apr 2001
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From: Toronto Ontario
St. Jude Donor '13
Re: Largest stroke in a ZZ4 short block? (vader86)
What mods are required to the block to go with either the 383 or the 396? More specifically the clearancing for the longer stroke?
Thanks,
Vic
Thanks,
Vic
Drifting
Joined: Nov 1999
Posts: 1,801
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From: St. Paul MN
Re: Largest stroke in a ZZ4 short block? (89'Bowtie)
My engine builder had to grind away on the block to make clearance for the connector rods. It is just a trial and error thing. You need to figure out where to grind, grind a bit, then try to fit the crank/rod/piston in and see if it clears. If it doesn't you grind some more.
You can build your engine for as much horsepower as your checkbook can handle.
You can build your engine for as much horsepower as your checkbook can handle.
Thread Starter
Race Director
Joined: Jul 2000
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From: College of Charleston, SC
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Re: Largest stroke in a ZZ4 short block? (Bob86ZZ4)
Thanks guys. I think when I get the $$$, I will go with a 396.
