did this engine come on anything other than a camaro?
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better yet, did the 416 heads come on anything other than an LG4 305?

 

The LG4 was a pretty common engine for General Motors- through 1986, the LG4 was carried in the Trans Am, Parisienne Wagon, Bonneville, and Grand Prix, and the equivalent models in the other GM divisions. The LG4 was offered with various horsepower figures but it was essentially the same engine across the board. Very common engine.

 

The engine was available on the Monte Carlo, Regal, Grand Prix, and Cutlass (RWD ver) thru 1987. in 1988 the "G" body was downsized to a FWD car, and the Caprice and large Olds were the only cars to probably get the engine in 1988...

I believe i may have also been also used on the light duity trucks in 1987, 1/2 ton truck/Suburban/Full size Blazer for example.

Obviously it was avaialble on the Firebird too through 1987

 

did valve size differ from any of them?

 

Don't forget the Corvette. :P

 

Far as I know, the 'vette was never offered with a 305.

 

1982 in Cali you could get a 305 vette.

 

Really? Now that's weird!

 

305 in a vette

 

Not just a 305, but an LG4, too. It was the only way they could meet California emissions in 1980, not 1982.

 

As far as I know the 416's came on L-69's as well as the LG-4. I think all the 305's had the same size valves but some early 305's like the 70's 305's might have had larger combustion chamber but I am not sure.

 

Of the 416 heads I've had, they have all had 1.87 Intake valves, while the others like the 415 and 301 heads have 1.84 intake. Also the 416 heads have 160cc intake runner and the others have 130-150, I'd have to get a set and measure them. I'm reworking a set of 416 heads right now for my wife's 350. One head is nearly done and is now 170cc intake with 63cc combustion chambers! I feel like these are great stock heads.

 

ALL 305 heads used on the F-body from 1982 - 1986 used the same GM part number, 14034807

the LG4 in 1987 used the same heads as the LB9 from 1987-1992 - 10159553

The LO3 however used part number 10159551, which was more restirctive.

For the Intake valves for all 305 heads too were the same from 82-86 ... Unlike the heads the LB9, LG4 and LO3 used the same valves from 1987 - 1992. The L98 used a different intake valve

From 1982 - 1992 ALL 305 & 350 EXHAUST valves were the same.

THe biggest difference between engines has been the cam.

THe 82 & 83 CFI used a unique cam, the L69, & LB9 from 83-85 used another cam, and the LG4 used an altogether different cam from 1982-1986. The 1986 LB9 used a unique cam shared with no other engine.

When the one piece rear main seal was introduced in 1987 the cams changed too, the 1987 LG4 & LB9/A4 used one cam the LB9/M5 & L98 used another. THis remained the case thru 1989, both the LO3 and LB9/A4 used one cam whereas the LB9/M5 & L98 used another. From 1990 - 1992 the LO3 used the same cam used from 1988 & 1989, but the LB9 & L98 used a new cam that was used on all trans combos.

Pistons again were a little different, only the LG4 from 1982 - 1984 got different pistons but from 1982 - 1987 all other 305 engines in F-bodies recieved the same pistons, as did all 305's from 1988 - 1992.

I hope that clears that up

John

 

So my 88 Iroc 305 TPI T5 had the 350 L98 cam, but LG4 heads? Strange.

 

Dangit,I think my 82 LG4 is the weakest of all LG4s offered

 

Why does that seem strange? The heads that were used on all LB9's were the same from 1987 - 1992 And it so happened that the LG4 heads were also the same, it was more than likely that they did this because the LG4's life was going to be short and there was no need to change the design for one year. The added performance of the LB9 over the LG4 was so great that there was no need to change much else.

If they used the same heads on the LO3 I wonder how well it would compare to an LB9, I bet it would perform reasonably well... In tests it probably performed too well and why they opted to change the heads for that engine application, that and the LO3 was more for economy to keep CAFE in check etc...

John

 

[QUOTE=okfoz]ALL 305 heads used on the F-body from 1982 - 1986 used the same GM part number, 14034807

I reject your reality and replace it with my own! I have personally taken 3 sets of 14014416 castings off of 305's. 1 from an 85 Monte Carlo SS. 1 from an 84 Trans Am L69. And 1 from an 83 Trans Am crossfire car. Maybe you should do a little more research.

 

I have a 305 out of an 86 SS Monte Carlo and it has the 416 heads as well.

 

roadthrills,
possibly you should do a little reasearch yourself before you "reject reality"
1) The Monte Carlo SS is a "G-Body" my statement clearly states F-Body, you even quoted it.
2) Casting numbers and Part numbers may NOT necessairly be the same in all cases.
3) The following attachment is from GM, its OFFICIAL.
4) I guess it could be argued that these are replacement head part numbers, However it would not change the fact that all 305 F-body heads were the same from 1982 - 1986... Its obvious that at least they were similar enough...
5) THe information in GM's "OFFICIAL" books have been known to be wrong, its unfortunate, however, I doubt this is the case.

 

OOPS! My bad. When I read your post I'm sure I read "part number". But, my brain was on casting numbers instead. There is definately a difference, and unlike some, I'll admit when I'm wrong.

 

LG4 was also in the caprices and impalas, ive owned and driven many

also the 416 heads were in the trucks too, had millions of them too, 86 was the last year

they are 1.84 not 1.87

 

And doesn't the LG4 have an aluminum intake and the LO3 a cast iron?

 

No. Cast iron intakes were pretty much out of favor by the time the L03 came around. Many of the non-computer controlled LG4s came with cast iron intakes.

 

Wow! Last post in this was THREE years ago! lol

 

Actually to further answer his initial question, the LG4 also came in the Full size Truck IIRC...

John