I purchased my HO TA new in 1984 (canadian)
When i tore the heads of the engine for a rebuild and some goodies the pistons are dished ???? the L69 I thought had Flat pistons!! my vin code is the HO (L69). The heads are the HO heads (1.90) intake valves ?
What is going on here? is this a canadian thing "EH"

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Fully restored 84 TA original factory spec (sucks) Mods when the kids grow up "Sigh" no money!

 

Are you sure you have an L69 (8th VIN = G) and not the LG4 (8th VIN = H)? No 305 ever had 1.9x", all the carbed 305s had the same "416" casting heads, which had 1.84" intake and 1.50" exhaust valves. Sounds like you have the LG4. Did it have the dual snorkel air cleaner and High Output badges on the dash, rocker panels, and rear bumper?

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George P. Lara
1984 "L69" A4
1994 LT1 M6
Member:
SCCA, SCFB, SC3GFB

 

No dual snorkle just the hood intake.
yes the car has all the HO and 5 liter Ho decals. and the tach red line is higher than on the Lg4 cars ! Other wise i got rip! way back then?? There were some strange fbody combos in canada!.
Think I will anchor my dock with it. Ya that It! and drop in my L82?


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Fully restored 84 TA original factory spec (sucks) Mods when the kids grow up "Sigh" no money!

 

Maybe thats not the original engine?

The heads and stuff are identical on the LG4 and L69 engines. The difference is the cam, and the exhaust.

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

Strange things can happen, especially when warranties are exercised. I picked up an '87 LB9 that was removed from the car in '92, supposedly all factory. Discovered it has two different types of heads on it - one as expected, the other a swirlport.

But, you're the original owner. Ever had warranty work done?

Or, perhaps the factory pulled a fast one.

Or, perhaps it's a Canadian thing...


Kevin, I was under the impression that LG4s had ~8.5 CR, L69s 9.something, due to dished vs. flattop pistons, respectively. Plus cam, exhaust, air cleaner like mentioned, to get the higher HP.

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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, WP 305 heads ported & polished, TBD headers & hi-flow 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 & shift kit, 3.08 10-bolt, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.

 

the L69 had 9.5:1 CR and a bumpier cam, better exhaust, the dual snorkel cleaner and all the badges.

 

40 horsepower.

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--Steve S--
1984 Trans Am 305 LG4, 5 speed
RPO codes point to Recaro version
Daily Driver, Flowmaster 80 Series

 

You're right, I forgot that part. *blush*

 

Well, it appears the '86 LG4's got the flat tops, so you were correct for that year, at least.

Still had the restrictive air cleaner & exhaust, and whimpy cam, though.