928 engine by model yr
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Rennlist Member
Joined: May 2009
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From: Woodstock Ga.
928 engine by model yr
I was curious regarding the 928 engine in regards to models. Specifically 4.5L,4.7L and 5.0L
I understand that the engine increased in size by making the bore larger 95mm to 97mm to 100mm.
Would it be safe to say that the engines are identical in overall strength. Aside from fuel delivery, engine mgt etc. That given proper fuel that a 4.5L and a 4.7L can increase as well without issue. Odviously a 5.0L will make more power. Is it safe to say that since a 5.0L can increase HP by 150hp(to pick a number) that a 4.5L or a 4.7L can increase by 150hp also and won't put more stress on the block or the internals than a motor with a larger bore?
I understand that the engine increased in size by making the bore larger 95mm to 97mm to 100mm.
Would it be safe to say that the engines are identical in overall strength. Aside from fuel delivery, engine mgt etc. That given proper fuel that a 4.5L and a 4.7L can increase as well without issue. Odviously a 5.0L will make more power. Is it safe to say that since a 5.0L can increase HP by 150hp(to pick a number) that a 4.5L or a 4.7L can increase by 150hp also and won't put more stress on the block or the internals than a motor with a larger bore?
Three Wheelin'
Joined: Nov 2008
Posts: 1,675
Likes: 4
From: TEXAS
Structure wise, I know that the 5.0 L block have thicker ribs between the cylinders, compared to the 4.5-4.7 engines. I would say twice as thick, this alone should make the 5.0 L blocks stronger. That is why I believe they use them for stroking compared to the earlier blocks.