081 heads or the 416s?
Thread Starter
Junior Member
Joined: Apr 2010
Posts: 23
Likes: 0
From: Hoschton, GA
Car: 1987 Firebird
Engine: 305 (LG4)
Transmission: 700R4
Axle/Gears: 2.73
081 heads or the 416s?
Im new to the third gens and chevy engines. I have heard lots of talk about which heads are better, either the 081s or the 416s. Im not sure which to go with. The heads I have on my car right now are the 081s and they need valve seals in a bad way so I need to rebuild anyway. I do have a set of 416s on a shelf that also need to be rebuilt.
The plan is to go with one set or the other and have a little machine work done to them. Im looking into a three angle valve job, possibly machined for screw in studs, 1.94 intake valves (depending on cost), and porting (to be done myself).
Which heads would be best for low end torque and drivability?
The plan is to go with one set or the other and have a little machine work done to them. Im looking into a three angle valve job, possibly machined for screw in studs, 1.94 intake valves (depending on cost), and porting (to be done myself).
Which heads would be best for low end torque and drivability?
On Probation
Joined: Oct 2008
Posts: 6,319
Likes: 19
From: Northern Utah
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Re: 081 heads or the 416s?
The 081s, definitely. Mostly for their improved, more efficient combustion chambers. It makes a difference.
Thread Starter
Junior Member
Joined: Apr 2010
Posts: 23
Likes: 0
From: Hoschton, GA
Car: 1987 Firebird
Engine: 305 (LG4)
Transmission: 700R4
Axle/Gears: 2.73
Re: 081 heads or the 416s?
Thank you for your input. Is there anyone else out there that has anything to offer on this subject?
Junior Member
Joined: Nov 2008
Posts: 75
Likes: 0
From: Lake Mary
Car: '87 IROC, '92 & 99 Corvette Vert.
Engine: L98, LT1, LS1
Transmission: L98 = 700R4
Axle/Gears: L98 = 3.23 G92
Re: 081 heads or the 416s?
I am using 081's on my rebuild too. Slowly porting them whenever time allows. Nothing to radical, just a good clean up for a little better flow.
CG
CG
Member
Joined: Sep 2004
Posts: 381
Likes: 1
From: Bement IL, Champaign,IL
Car: 1985 IROC-Z Silver
Engine: Vortec 5.7L
Transmission: WC-T5
Axle/Gears: 3.23 disc brake 10 bolt
Re: 081 heads or the 416s?
same heads.. 081's just use the 87-95 bolt pattern and 416's are pre-87..
On Probation
Joined: Oct 2008
Posts: 6,319
Likes: 19
From: Northern Utah
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
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