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Old 09-11-2009, 01:01 PM   #1 (permalink)
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Default 8 valve engine vs. 16 valve engine

besides better mileage and more pep what is the big difference in the 8 valve
vs. the 16 valve engines.
It is a 1994 auto with manual hubs.
Thanks, Rich
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Old 09-11-2009, 02:10 PM   #2 (permalink)
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8 valve - G16a
16 valve - G16b

The compression ratio is different.
G16a is 8.9:1
G16b is 9.5:1

Not 100% on this but the G16b has MPI injection and the G16a has TPI. Could be wrong tho.

The exhaust manifolds are also different (g16a is longer?)

I'm sure there's plenty of other differences
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Old 09-11-2009, 09:02 PM   #3 (permalink)
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Quote:
Originally Posted by pure_e View Post
8 valve - G16a
16 valve - G16b

The compression ratio is different.
G16a is 8.9:1
G16b is 9.5:1

Not 100% on this but the G16b has MPI injection and the G16a has TPI. Could be wrong tho.

The exhaust manifolds are also different (g16a is longer?)

I'm sure there's plenty of other differences
I guess that means that parts are NOT interchangeable.
Ithought I might be able to put the 16 valve head in place of the 8 valve head.
Rich
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Old 09-11-2009, 09:06 PM   #4 (permalink)
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im running a 16V block with my 8V head and everything, just need to change the oil pump and oil pan
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Old 09-12-2009, 08:14 AM   #5 (permalink)
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Quote:
Originally Posted by Jasenford View Post
im running a 16V block with my 8V head and everything, just need to change the oil pump and oil pan
I wanted to do it the other way around .
I have a good running 8 valve engine and a tore up 16 valve ( spun the bearings) engine,. I though if I put the 16 valve head on the 8 valve engine I would get the benifits of more power and better mileage.
Rich
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