Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

1986 pontiac firebird trans am 5.0L V8 F/I

Thread Tools
 
Search this Thread
 
Old Feb 4, 2016 | 02:18 PM
  #1  
slappahoe2000's Avatar
Thread Starter
Junior Member
 
Joined: Feb 2016
Posts: 6
Likes: 0
1986 pontiac firebird trans am 5.0L V8 F/I

as many of you know, the 86 trans am is garbage. mine is bone stock, not so fast at all.
thinking about putting a cold air intake on it, what else can i do to increase its 0-60 time?
Reply
Old Feb 4, 2016 | 02:28 PM
  #2  
Bob88GTA's Avatar
Supreme Member
20 Year Member
iTrader: (2)
 
Joined: Apr 2000
Posts: 3,938
Likes: 99
From: Huntsville AL
Car: 88GTA
Engine: 5.7TPI
Transmission: Auto
Axle/Gears: 3.27
Re: 1986 pontiac firebird trans am 5.0L V8 F/I

Reply
Old Feb 4, 2016 | 07:56 PM
  #3  
mjdavis68's Avatar
Senior Member
iTrader: (1)
 
Joined: Dec 2009
Posts: 627
Likes: 1
From: Waxahachie Texas
Car: 88 IROC Z/28-under re-construction
Engine: 5.7 Tuned Port
Transmission: It's in there....
Axle/Gears: 9 bolt Borg-Warner
Re: 1986 pontiac firebird trans am 5.0L V8 F/I

"That's whaughtumtalkinBOUT!"
Reply
Old Feb 4, 2016 | 11:33 PM
  #4  
Night rider327's Avatar
Supreme Member
iTrader: (13)
 
Joined: Dec 2002
Posts: 2,535
Likes: 17
From: Bowdon, GA.
Car: 1988 Camaro
Engine: 355, 10.34:1, 249/252 @.050", IK200
Transmission: TH-400, 3500 stall 9.5" converter
Axle/Gears: Ford 9", detroit locker, 3.89 gears
Re: 1986 pontiac firebird trans am 5.0L V8 F/I

Change the rear end/gear ratio will get you the biggest seat of pants improment for your money.

You can buy a complete rear end for $100-300, it only takes a couple of hours to swap whole rear ends.

Your car came with a 2.73 rear gear. Go to a 3.42 or 3.73 and it will feel like you added a supercharger to the car lol

One of the test I remember reading was car craft. They took a mustang with a 5.0L engine and done some testing/swapping.
Car had 2.80 gear ratio. Ran 14.921 @ 96.02 in 1/4 mile
Swapped in 3.25 gears and ran 14.276 @ 97.32
Shaving over .6 seconds off your ET is a BIG gain that you will feel
Reply
Old Feb 5, 2016 | 11:44 AM
  #5  
86LG4Bird's Avatar
Supreme Member
iTrader: (1)
 
Joined: Aug 2007
Posts: 1,390
Likes: 0
From: Bright, IN
Car: '86 Bird, 96 ImpalaSS, 98 C1500XCab
Engine: LG4, LT1, L31
Transmission: 700R4, 4L60E, 4L60E
Axle/Gears: 3.73 Tors, 4.88 spool, 3.73 Eaton
Re: 1986 pontiac firebird trans am 5.0L V8 F/I

auto trans or 5 spd?
Reply
Old Feb 5, 2016 | 11:55 AM
  #6  
slappahoe2000's Avatar
Thread Starter
Junior Member
 
Joined: Feb 2016
Posts: 6
Likes: 0
Re: 1986 pontiac firebird trans am 5.0L V8 F/I

auto...
Reply
Old Feb 5, 2016 | 12:03 PM
  #7  
86LG4Bird's Avatar
Supreme Member
iTrader: (1)
 
Joined: Aug 2007
Posts: 1,390
Likes: 0
From: Bright, IN
Car: '86 Bird, 96 ImpalaSS, 98 C1500XCab
Engine: LG4, LT1, L31
Transmission: 700R4, 4L60E, 4L60E
Axle/Gears: 3.73 Tors, 4.88 spool, 3.73 Eaton
Re: 1986 pontiac firebird trans am 5.0L V8 F/I

A torque converter upgrade is some real bang for the buck on an auto trans car.
Ideally, a 9.5" 2800 rpm stall unit like this: http://www.edgeracingconverters.com/...ions-p-35.html


Or, for about 1/3 the cost and still getting at least half of that performance boost, consider this: http://www.rockauto.com/en/catalog/c...converter,8668


Don't let anyone talk you into more than the 2800 stall on a TPI street setup, unless you're only interested in 60' and 1/4 miles times, and running slicks or drag radials.
Reply
Old Feb 5, 2016 | 03:44 PM
  #8  
mantaguy's Avatar
Supreme Member
15 Year Member
Liked
Loved
Community Favorite
iTrader: (5)
 
Joined: Nov 2010
Posts: 5,892
Likes: 84
From: Mantua NJ
Car: 1 Owner 1986 TA with a WS6 package
Engine: 5.0 EFI
Transmission: THM700R4
Axle/Gears: 277 Posi Speedo
Re: 1986 pontiac firebird trans am 5.0L V8 F/I

Originally Posted by slappahoe2000
as many of you know, the 86 trans am is garbage. mine is bone stock, not so fast at all.
thinking about putting a cold air intake on it, what else can i do to increase its 0-60 time?
This should read
as many of you know, MY 86 trans am is garbage. mine is bone stock, not so fast at all.
thinking about putting a cold air intake on it, what else can i do to increase its 0-60 time?
Reply
Old Feb 5, 2016 | 05:35 PM
  #9  
Bob88GTA's Avatar
Supreme Member
20 Year Member
iTrader: (2)
 
Joined: Apr 2000
Posts: 3,938
Likes: 99
From: Huntsville AL
Car: 88GTA
Engine: 5.7TPI
Transmission: Auto
Axle/Gears: 3.27
Re: 1986 pontiac firebird trans am 5.0L V8 F/I

I was gonna say somethig along those lines Fran, but just posted the Vette engine instead. Getting older I guess. Mine are fast enough for me.
Reply
Old Feb 5, 2016 | 06:00 PM
  #10  
mantaguy's Avatar
Supreme Member
15 Year Member
Liked
Loved
Community Favorite
iTrader: (5)
 
Joined: Nov 2010
Posts: 5,892
Likes: 84
From: Mantua NJ
Car: 1 Owner 1986 TA with a WS6 package
Engine: 5.0 EFI
Transmission: THM700R4
Axle/Gears: 277 Posi Speedo
Re: 1986 pontiac firebird trans am 5.0L V8 F/I

Yea! I didn't care for the generalization of the post.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
mattbhm
Interior
18
Apr 24, 2016 09:08 AM
toomanybirds
Exterior Parts Wanted
5
Feb 14, 2016 05:23 PM
KJ1H
North East Region
1
Feb 12, 2016 09:00 AM
birdman53
Firebirds for Sale
1
Feb 4, 2016 12:38 PM
Chough262
Firebirds Wanted
1
Jan 31, 2016 12:09 PM




All times are GMT -5. The time now is 03:39 AM.