300ZX (Z31) Performance / Technical Discussions related to Turbo charging, Supercharging, Engine, ECU, exhaust, and etc. performance enhancements and Techical related.

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Old 02-25-2008 | 04:15 AM
  #1  
84z31nonturbo's Avatar
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From: Waynesville, NC
Heads

This may be a simple question but, can I put heads from an 85 vg30et onto an 84 vg30e? Obviously they will bolt on but are the valve lengths the same and everything? From what I have read everything will work just fine, but I am just not positive.
Old 02-25-2008 | 10:00 AM
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turboZ87.300's Avatar
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If I remember right, the only thing that was changed was the pistons. You might check on the cams...
Old 02-25-2008 | 12:09 PM
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From: Mt. Carmel, PA
Heads from 84 to Early 87 are the same. From late 87 to 89 are the same

What you got will work fine.
Old 02-25-2008 | 02:17 PM
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hoov100's Avatar
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why does everyone assume that just because its turbo the heads are different?
Old 02-26-2008 | 06:52 AM
  #5  
84z31nonturbo's Avatar
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I was assuming the were different because I know the vg30et has lower compression (shorter pistons). I was not sure if the valves in the vg30et heads were longer, I didn't want to put turbo heads on my non turbo engine and have the valves hit the pistons. But I thank everyone for their input, and information.
Old 02-26-2008 | 01:38 PM
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hoov100's Avatar
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it doesnt have shorter pistons, it has dished pistons, which lower the compression.
Old 02-26-2008 | 07:19 PM
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84z31nonturbo's Avatar
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Didnt know that. Thanks for the info.
Old 02-27-2008 | 12:30 AM
  #8  
hoov100's Avatar
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From: palm desert
its the same thing for all zcars except for the 83 280zx, the turbo cars had hydraulic lifters
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