Ok.. I have a 305 and the VIN sais I have the LG4 engine (and no G92 on the RPO sheet). But she dosn't act like a LG4.. it moves quite a bit faster. I was reading that LG4 cars while doing torque burns will only have one wheel spinning and the other periodically spin wheras the L69 has both wheels spinning.. and both my wheels definetly spin.. So, help me out.. what engine do I have ?? How can I tell for sure??

Thanks..

 

Sounds like you're talking about a posi rear. You can get an LG4 with a posi.LG4's are crap (trust me) but you could spin both tires in one. If you have the stock 215's in the back, those good 'ole skinny tires will allow you to spin quite a bit.

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1987 Camaro Sport Coupe LG4
700R4 with 2.73 open rear
Hypertech chip, 180* stat
L69 Dual snorkel air cleaner with K&N air filter
CK rods with B hanger
Hooker catback
Pioneer DEH-P4000, Pioneer speakers front/back

 

Ahhh, Lg4's arent soo bad

Better than an L03, By far!




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60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver
Reader's ride -> My Ride

Just another Hot Rod kid, or thats what they all tell me.
Livin' the Stereotype

 

Yeah, LG4's aren't THAT bad. Better than a six cyl. :P
Besides, I can spin both my tires (235/60 15's) for a long time.......on wet pavement.

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'83 Z28
305 4bbl
TH-700R4
3.23 posi (ok, L/S)
no mods... yet

 

To answer your question, if you're sure it's a 305, and it has a carb. then it's an LG4.

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'83 Z28
305 4bbl
TH-700R4
3.23 posi (ok, L/S)
no mods... yet

 

A L69 was also a carburated 305 that was available in 84.
I had a LG4 w/ a 3.42 posi rear (factory) in my 82 Z28, and it felt much stronger than other LG4's I had driven. It also had the TH200 tranny instead of the 700R4. Mine would smoke the BFG 235/60/15 that I had on the car bone stock, but my car was a hardtop, had no interior power accessories, no tilt, no cruise,it was even radio delete car, and had the factory fiberglass hood that they used in 82-83. It only weighed 3240 bone stock with nothing taken off, so that's one reason my car felt much stronger than all the other T top, full power cars I had driven.

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82 Z28 383, Ported 215cc Dart Iron Eagle Heads, Comp custom grind roller cam, Speed Pro .250" domes, Wheeler Motorsports 4340 I beam rods, Eagle 5140 steel crank, Weiand Team G intake, Holley 800 DP, hedman headers
Trans: Turbo 350 w/ 4000 stall -- Rearend 7.5 w/ Richmond 4.10's, Auburn Minispool
Best ET: *NEW ENGINE* untried at track!!


89 RS, L03 305, Hypertech Chip,cat delete, Dynomax exhaust,K&N open element Filter,160 stat, MSD coil --Trans:700R4 Corvette Servo -- Rearend: 7.5 GM 3.42 w/ posi-lock
New Best ET: 14.91 @92.9
Bassett Racing
Mid Atlantic F Body -82 Z28 Page

R.I.P. Dale Earnhardt #3

 

Ooops, I just read my post, what I meant to say was, if you're sure it's a 305 and it has a carb. with a single snorkel intake, then it's more than likely an LG4. My bad, I was in a hurry. The L69's had the dual snorkel intake, not to say that you couldn't have an L69 with a single snorkel, it's just unlikely.

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'83 Z28
305 4bbl
TH-700R4
3.23 posi (ok, L/S)
no mods... yet

 

If you check the casting number on the engine You would be able to confirm what engine you have. The number is located on the right side at the rear of the engine. If you go to the head and follow it to the firewall and go down the head to the block you will find a ledge. Can all the **** of the block and you will find the casting number. Do a search on the archives on "casting numbers"