4.5 or 4.6

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PB609
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Joined: January 13th, 2023, 3:37 am
Vehicle Year: 2001
Vehicle Make: Jeep
Vehicle Model: Cherokee

4.5 or 4.6

Post by PB609 »

Hey Y'all! New to the forum.
So, I don't see a lot of info regarding a 4.5 build. Is that kinda useless to date or is 4.6 just the way to go?
I've got an 01 that needs rebuilding and am looking to stroke it out.
I had plans on a 4.2 crank and rods with standard bore pistons along with everything else involved for a 4.5. Or should I just go with the 4.6?

Thanks!!
Russ Pottenger
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Re: 4.5 or 4.6

Post by Russ Pottenger »

Unless you’re planning to rebuild a Briggs & Stratton lawnmower engine, or your John Deere tractor engine I would never rebuild a engine with a standard bore if there was ever a consideration of a upgrade in performance

My .02
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Cheromaniac
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Re: 4.5 or 4.6

Post by Cheromaniac »

PB609 wrote: January 19th, 2023, 12:14 pm Hey Y'all! New to the forum.
So, I don't see a lot of info regarding a 4.5 build. Is that kinda useless to date or is 4.6 just the way to go?
I've got an 01 that needs rebuilding and am looking to stroke it out.
I had plans on a 4.2 crank and rods with standard bore pistons along with everything else involved for a 4.5. Or should I just go with the 4.6?

Thanks!!
I wouldn't risk keeping a standard bore size on a 22 year old block where the roundness and taper of the cylinders may be outside factory tolerances. A +0.020" overbore (3.895" bore) is the minimum required and that, combined with a 3.895" stroke, would make the engine perfectly square with a displacement of 4563cc.
1992 XJ 4.6 I6 - 5MT - Stroker build-up, Stroker "recipes" Sold
1995 Mustang GT - 4AT - Modded Sold
2006 Mustang GT - 5MT - Modded Midlife Crisis Car :mrgreen:
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