What is the difference between the 305 LG4 and the 305HO L69?
Thanks

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1985 305 Z28
White w/Red interior
Mods:
GTS Headlight Covers
K&N Chrome Element and Filter
Flowmaster 80 series muffler
Chrome Valve Covers

 

Air cleaner (dual snorkel on L69); cam (better lift & duration on L69); compression some years (not '86); larger exhaust manifolds, y-pipe & convertor on L69.

Decal.

35-45 HP, depending upon year.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/LB9 block, ZZ3 cam and intake, TBD heads ported & polished, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.

 

Besides the engine differences, there are often many other differences between a car with an L69 and an LG4. Mainly in the rear end...so not only does the L69 produce much more hp, in many cases it gets it to the tires more effeciently.

I've heard, but don't know for sure, that the carb is different as well.

 

thanks guys, i'll probably pick up a new cam for my LG4

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1985 305 Z28
White w/Red interior
Mods:
GTS Headlight Covers
K&N Chrome Element and Filter
Flowmaster 80 series muffler
Chrome Valve Covers

 

Didn't the L69 cars have 3.73's in the rear?
Or was that just an option? Mine had 'em, until the carrier and ring-gear self-destructed.

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DR Stevens
Car #1:
1984 TA L69 H.O.
750 cfm Q-Jet reman. by Holley, 700R4 /w/ Superior shiftkit, 3.42 lim.slip, 4whl disc, underdrive pulleys, Accel HEI, experimental dual snorkel /w/ hood louver, some sort of weird 3" exhaust soon to be replaced
Car #2:
'91 Firebird/Formula LO3
all stock except K&N air filter (but not for long!!)

 

L69 has larger intake valves!

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Recently Ported Heads, Installed Larger Race-Flo Valves and RPM Air Gap Intake (No new times)
Other Mods: You name it and I have probably changed it.

2001 Dodge Ram Quad Cab 5.9L 4*2

The Bowtie
ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

 

85_ZED28, what do you think of the 80 series flowmaster with the LG4?

What kind of tone does it give you?

I am debating between the Flowmaster 80 series, and a Hooker Aerochamber...

Thanks

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Stuart S
1987 Trans Am LB9/WS6
1986 Camaro IROC-Z
OEM Posterchild of the soon to be Infamous Long Island Crew

 

?

 

The cam is different in the L69 as well as a bumped up compression ratio. There are differences to the carb for the L69. Metering rods I think? All L69 cars got the 3.73 rear gear although some are posi some are not.

 

Didn't the L69 have a specially calibrated Carburetor and lighter flywheel as well ???? Im also pretty sure the intake was aluminum because the car was a Z28 where the LG4 has an Iron intake in Sports coups and Berlinetta Camaro's.

John in RI
84 Berlinetta (black)
84 Berlinetta (getting painted)