are they the same?
 

is a Plenum off an 85 the same as a plenum off an 87?
oh and its off a 305 also.
i want to buy one so I can port it and polish it.
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wishmister@yahoo.com

1987 White IROC-Z
305 TPI LB9
700-R4 auto tranny
87,000 miles
Very Clean car
Performance Resource Chip
Flowmaster Muffler
Throttle Body Coolant bypass
TPIS air Foil
K&N's
Gutted air box
Accel 8.0 plug wires
Moroso Super Coil
Blue Streak Cap and Rotor
AC Delco Rapidfire plugs
Mobil 1 15/50 Synthetic motor oil
Mobil 1 synthetic Trans fluid.

[This message has been edited by Wishmaster's87IROC (edited October 24, 2000).]

I could be wrong, but I think they are different.
I would wait and see what everyone else has to say though.

i tihnk 87 was the year they changed the center 2 bolt holes on the intake. i'm not 100% sure either but i believe the bolt holes are differant.

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-=ICON MOTORSPORTS=-

Who would know for sure? What do you mean the center 2 bolts, I asking about a PLENUM, not an intake...forgive me if I misunderstood ya.

I am looking to buy a Plenum off an 85 TPI motor but I have an 87 and wonder if it will fit or am I just wasting my time and money?

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wishmister@yahoo.com

1987 White IROC-Z
305 TPI LB9
700-R4 auto tranny
87,000 miles
Very Clean car
Performance Resource Chip
Flowmaster Muffler
Throttle Body Coolant bypass
TPIS air Foil
K&N's
Gutted air box
Accel 8.0 plug wires
Moroso Super Coil
Blue Streak Cap and Rotor
AC Delco Rapidfire plugs
Mobil 1 15/50 Synthetic motor oil
Mobil 1 synthetic Trans fluid.

[This message has been edited by Wishmaster's87IROC (edited October 24, 2000).]

Wish,

There were some changes. The earlier pleni had EGR and IAC air passage tubes and therefore the ports to the cold start injector. The later non-cold start TPI engines didn't need the cold start ports, but I'm fairly certain that change occurred in 1988 (1989 model-year), not 1986-87. The GM part number for an '87 is 14081006. Check the casting number on the '85 to see if it's the same.

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Later,
Vader
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"Make Me Bad"
Adobe Acrobat Reader 4.0

[This message has been edited by Vader (edited October 24, 2000).]