2.8 in an 2.5 Fiero

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2.8 in an 2.5 Fiero

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2.8 in an 2.5 Fiero by 279fiero84

Started on	: 03-16-2025 12:56 PM
Replies	: 3 (89 views)
Last post by	: MulletproofMonk on 03-18-2025 03:37 PM

279fiero84
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Report this Post03-16-2025 12:56 PM

Thanks for allowing me to join!
I have a question about putting a 2.8 MPI from a 88 Celebrity in place of my 2.5. Has anyone done this with the later 2.8L MPI? Also will the transmission bolt up or do i have to swap the whole drivetrain in? Thank you

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55 Chevy, 87 Monte Carlo SS, 84 Z28, 84 Fiero

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cartercarbaficionado
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Report this Post03-16-2025 06:29 PM

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quote

Originally posted by 279fiero84:

Thanks for allowing me to join!
I have a question about putting a 2.8 MPI from a 88 Celebrity in place of my 2.5. Has anyone done this with the later 2.8L MPI? Also will the transmission bolt up or do i have to swap the whole drivetrain in? Thank you

it will bolt in mostly. the 84 harness needs some modifications though

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MulletproofMonk
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Report this Post03-18-2025 03:17 PM

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The Celebrity 2.8L is rated at 125 hp and the Fiero 2.8L is rated at 140 hp
If you are pulling the motor from a junkyard, you might ask around if someone is selling a Fiero 2.8L or even someone pulling out a 3.4L (165 hp)

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-Brian

My 87 GT Poly Suspension Upgrade (all pics) thread
Removing the roof panel
My HUD install thread
Modified stock air canister and base to 3.5 inch for 3800na

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MulletproofMonk
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From: Dayton, OH (Bellbrook, OH 45305)
Registered: Oct 2005

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Report this Post03-18-2025 03:37 PM

So you are basically moving the motor from the front of the car straight back into the Fiero engine compartment.
Your intake will be pointed to the left side, but you are going to have to deal with
intake hose
exhaust manifolds to the exhaust since you have a 4cyl
wiring harness
oil fill will be against the firewall
mounts will probably be different
fuel lines probably aren't going to line up

------------------
-Brian

My 87 GT Poly Suspension Upgrade (all pics) thread
Removing the roof panel
My HUD install thread
Modified stock air canister and base to 3.5 inch for 3800na

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