possible new source for forged pistons.
Thread Starter
Member
Joined: Oct 2004
Posts: 253
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From: Moberly Missouri
Car: 1985 Firebird
Engine: 3.1L (planning for a turbo)
Transmission: 700R4
Axle/Gears: 3.42
possible new source for forged pistons.
I'm asking first, would these forged fiero pistons work in our versions of the 660?
http://www.secureleadercom.com/fssto...Bit=3&dept=352
look in the second row on the right side.
Part # 52833
If those work then thats awesome...
http://www.secureleadercom.com/fssto...Bit=3&dept=352
look in the second row on the right side.
Part # 52833
If those work then thats awesome...
Thread Starter
Member
Joined: Oct 2004
Posts: 253
Likes: 0
From: Moberly Missouri
Car: 1985 Firebird
Engine: 3.1L (planning for a turbo)
Transmission: 700R4
Axle/Gears: 3.42
so is that a no on a 3.1? they both a 3.5 inch bore didnt they? if not would the .40 over 2.8 fir a non-bored 3.1?
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Joined: Jan 2000
Posts: 20,981
Likes: 11
From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
The wrist pin locations are different to allow for the longer stroke without smacking the piston into the head.
GM used the same rods in both the 3.1 and 2.8 (5.7"), to do this they had to move the wristpin up higher on the piston. Thread Starter
Member
Joined: Oct 2004
Posts: 253
Likes: 0
From: Moberly Missouri
Car: 1985 Firebird
Engine: 3.1L (planning for a turbo)
Transmission: 700R4
Axle/Gears: 3.42
so its either rework the pistons or use a 2.8 crank then... which would decrease the displacment.. but would allow for a nice bit of boost......
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. Moderator
Joined: Jan 2000
Posts: 20,981
Likes: 11
From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Joined: Mar 2006
Posts: 4,370
Likes: 18
Car: 1973 Datsun 240Z/ 1985 S-15 Jimmy
Engine: Turbo LX9/To be decided
Transmission: 5-speed/T-5
Axle/Gears: R200 3.90/7.5" 3.73
Thread Starter
Member
Joined: Oct 2004
Posts: 253
Likes: 0
From: Moberly Missouri
Car: 1985 Firebird
Engine: 3.1L (planning for a turbo)
Transmission: 700R4
Axle/Gears: 3.42
I wont ever run that high a boost level.. thats crazy... I'd proably stick at around 7-10 max on stockers.
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