Difference between '88 and '95 460
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Cargo Master
Joined: Feb 2008
Posts: 2,862
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From: Tooele, UT
Difference between '88 and '95 460
Hey guys I was just wondering what the differences were between the 88 and 95 460s. I'm looking at replacing the motor in my 95 and found an 88 efi with 95K miles. What are some problems I might run into?
Post Fiend
Joined: Jan 2000
Posts: 5,330
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From: Dryden, ON, Canada
Cylinder heads and pistons. The 88 has smaller valves and runs less dish in the piston but a lower pin height. Effective compression is the same but the later engines have more dwell time at tdc.
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Cargo Master
Joined: Feb 2008
Posts: 2,862
Likes: 44
From: Tooele, UT
I knew the heads would be different. I was going to swap my freshly rebuilt heads on it anyways. I didn't know about the pistons though. That would mean my larger valves wouldn't clear the reliefs in the piston?
Lead Driver
Joined: Jul 2007
Posts: 7,868
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From: Rhode Island
The '95 pistons have better quench - they have a different piston pin height that pushes them higher into the bore.
If you have worked over heads with larger valves, I highly recommend sticking with the 93+ blocks, or at least putting 93+ pistons into your engine.
If you have worked over heads with larger valves, I highly recommend sticking with the 93+ blocks, or at least putting 93+ pistons into your engine.
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Cargo Master
Joined: Feb 2008
Posts: 2,862
Likes: 44
From: Tooele, UT
This is the stuff I needed to know. I will probably just pull my motor and rebuild it then. Unless I come across a low mileage '93+ motor. It'll probably cost about the same anyway depending on how much machine work costs but even if it ends up being a little more I'll know the motor is fresh.
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