L69 carb question
#1
Junior Member
Thread Starter
Join Date: Jul 2001
Location: Jersey City, NJ
Posts: 19
Likes: 0
Received 0 Likes
on
0 Posts
L69 carb question
I want to get a better carb. I've been looking at the Edlebrock Performer. The 50 state legal one. I was wondering if this carb was compatabile with my car. It's an 84 TA with the L69 motor.
Would a Holley be better for my car??
I'm looking for something at 600-650 cfm.
------------------
Manny
84 Trans Am
Would a Holley be better for my car??
I'm looking for something at 600-650 cfm.
------------------
Manny
84 Trans Am
#2
Supreme Member
iTrader: (1)
Join Date: May 2001
Location: Greenwood, Indiana
Posts: 1,638
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1984 Trans Am
Engine: Vortec 355
Transmission: TH-700R4
Axle/Gears: GM Axles and GM 3.73
hey this is off the subject.....but is yours a HO?
cuz i have a 84 TA with the L-69 and mine doesnt have the HO dual snorkel
does yours??
------------------
84TA T-tops L-69 305HO TH-700R4 stock 190hp and 240 ft-lbs.
new best E.T. (dont laugh) 15.986 @84.93mph
old best E.T 15.997@86.04
http://www.geocities.com/K_towngangsta
cuz i have a 84 TA with the L-69 and mine doesnt have the HO dual snorkel
does yours??
------------------
84TA T-tops L-69 305HO TH-700R4 stock 190hp and 240 ft-lbs.
new best E.T. (dont laugh) 15.986 @84.93mph
old best E.T 15.997@86.04
http://www.geocities.com/K_towngangsta
#3
Moderator
iTrader: (14)
Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 43,169
Likes: 0
Received 35 Likes
on
34 Posts
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
"50 State Legal" does not apply to computer controlled carbs, which yours is, which also means that carb is not compatible with computer controlled distributors.
Also, both Edelbrock and Holley are square bore flanges, meaning neither would fit your stock intake manifold without an adapter.
You also need to better define "better". Your stock carb flows around 700-750 cfm, so if flow is what you're looking for, you already have a "better" carb.
Unless it's been beat up or otherwise abused, the stock q-jet is rarely the cause of problems on a stock 305.
------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).
Also, both Edelbrock and Holley are square bore flanges, meaning neither would fit your stock intake manifold without an adapter.
You also need to better define "better". Your stock carb flows around 700-750 cfm, so if flow is what you're looking for, you already have a "better" carb.
Unless it's been beat up or otherwise abused, the stock q-jet is rarely the cause of problems on a stock 305.
------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).
#4
Senior Member
Join Date: Jul 1999
Location: Christchurch, New Zealand
Posts: 565
Likes: 0
Received 0 Likes
on
0 Posts
<font face="Verdana, Arial" size="2">Originally posted by MattW:
hey this is off the subject.....but is yours a HO?
cuz i have a 84 TA with the L-69 and mine doesnt have the HO dual snorkel
does yours??
</font>
hey this is off the subject.....but is yours a HO?
cuz i have a 84 TA with the L-69 and mine doesnt have the HO dual snorkel
does yours??
</font>
#5
Supreme Member
Join Date: Jun 2001
Location: Allensville, PA
Posts: 1,012
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 Trans Am GTA
Engine: 5.7 TPI (Now HSR)
Transmission: 700R4 by Probuilt
Axle/Gears: 3:27 9 Bolt Posi W/ Discs
my car is an 84 with the L69 and it has the dual snorkels it is a Z-28 though
------------------
I own a bad @$$ 84 Z-28
kills:
85-90 formula bird 2 times
some moron in a gran prix
2 different 5.0 stangs
and many other less impressive cars
losses;
not really a loss it was a not so stock mid 80s stang that turned down a side street when i tried to pu him in his place
------------------
I own a bad @$$ 84 Z-28
kills:
85-90 formula bird 2 times
some moron in a gran prix
2 different 5.0 stangs
and many other less impressive cars
losses;
not really a loss it was a not so stock mid 80s stang that turned down a side street when i tried to pu him in his place
#6
Supreme Member
Join Date: Jun 2001
Location: Allensville, PA
Posts: 1,012
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 Trans Am GTA
Engine: 5.7 TPI (Now HSR)
Transmission: 700R4 by Probuilt
Axle/Gears: 3:27 9 Bolt Posi W/ Discs
my car is an 84 with the L69 and it has the dual snorkels it is a Z-28 though
------------------
I own a bad @$$ 84 Z-28
kills:
85-90 formula bird 2 times
some moron in a gran prix
2 different 5.0 stangs
and many other less impressive cars
losses;
not really a loss it was a not so stock mid 80s stang that turned down a side street when i tried to pu him in his place
------------------
I own a bad @$$ 84 Z-28
kills:
85-90 formula bird 2 times
some moron in a gran prix
2 different 5.0 stangs
and many other less impressive cars
losses;
not really a loss it was a not so stock mid 80s stang that turned down a side street when i tried to pu him in his place
#7
Junior Member
Thread Starter
Join Date: Jul 2001
Location: Jersey City, NJ
Posts: 19
Likes: 0
Received 0 Likes
on
0 Posts
So if were to install a new carb and intake manifold on my L69, how much of a HP and TRQ increase am I looking at??
------------------
Manny
84 Trans Am
------------------
Manny
84 Trans Am
Trending Topics
#8
Supreme Member
Join Date: Jul 2001
Location: LaFayette, NY
Posts: 1,731
Likes: 0
Received 0 Likes
on
0 Posts
Car: '10 Subaru Forester
Engine: 2.5 Boxer
Transmission: 4EAT
Axle/Gears: 4.44
I would say you're looking at 10 Hp with new manifold and carb... only if you match Q-jet's ~700 CFM... If you add open element or snorkels maybe 15 or 20 Hp... but then again if your car is tuned real well right now you will probably only see 10 Hp max...
------------------
1984 Firebird - Daily driver, 305 LG4, T5 - Hurst short shifter, Edelbrock 600 CFM Performer Carb - Edelbrock Pro-Flow 1000 air filter, gutted cat, IROC 16x8 Wheels, Goodyear P215/60/R16, AIWA bargain basement (from Sears of course) CD player
Check out my ride... needs a little work... looks pretty good though
Quote from my sister: "It sounds like a boat"
[This message has been edited by ChillPhatCat (edited August 02, 2001).]
------------------
1984 Firebird - Daily driver, 305 LG4, T5 - Hurst short shifter, Edelbrock 600 CFM Performer Carb - Edelbrock Pro-Flow 1000 air filter, gutted cat, IROC 16x8 Wheels, Goodyear P215/60/R16, AIWA bargain basement (from Sears of course) CD player
Check out my ride... needs a little work... looks pretty good though
Quote from my sister: "It sounds like a boat"
[This message has been edited by ChillPhatCat (edited August 02, 2001).]
#9
Moderator
iTrader: (14)
Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 43,169
Likes: 0
Received 35 Likes
on
34 Posts
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Rock,
What I think you need to understand is that the carb is not the first place to go for more HP. Headers & cat would add a lot more for only slightly more money, cam would do even more with the headers, World S/R 305 heads would be complimented nicely by the exhaust & cam; and even then the q-jet will handle all the duties just fine.
If you do something with the intake, get a Performer or Action + (EGR version). If, someday, you do go with an Edelbrock or Holley carb, either of those intakes will have the bolt pattern to work with the square bore mount as well as your q-jet (which you are going to keep until all the things in the above paragraph are done).
What I think you need to understand is that the carb is not the first place to go for more HP. Headers & cat would add a lot more for only slightly more money, cam would do even more with the headers, World S/R 305 heads would be complimented nicely by the exhaust & cam; and even then the q-jet will handle all the duties just fine.
If you do something with the intake, get a Performer or Action + (EGR version). If, someday, you do go with an Edelbrock or Holley carb, either of those intakes will have the bolt pattern to work with the square bore mount as well as your q-jet (which you are going to keep until all the things in the above paragraph are done).
Thread
Thread Starter
Forum
Replies
Last Post
84z96L31vortec
Tech / General Engine
7
08-20-2017 12:16 AM