is it a 1300 1500 or 1600hmmm

[oldy]

how do i find out what size me engines are.

[avenga]

Look on the side of the engine block under the exhaust and there will be an identification letter. LB is a 1500/1600 and an SB is a 1250/1300.

I have seen other numbers but I'm not sure of all of them

Let use know what your block says.

[avenga]

Here is a photo of my 1500. You can see the "LB" showing it is a 1500/1600.

[JoKer]

alright then what's diff between 15 and a 16? heads?

[avenga]

My 1500 has the "S" head, which was unique to the 1500 twin carb cars and was also used as the basis for the Tiger head, or so I have heard.

The "S" head has bigger valves and double valve springs and can be identified by a small S cast in to the top of the head above the first inlet port (next to the radiator output)

The springs are different on a 1500 vs a 1600 head (single carb 1500 42.32mm vs 1600 40.44mm, dual carb 1500 outer 38.35mm, inner 30.48mm vs 1600 outer 40.44mm, inner 32.0mm)

1600 twin carb heads don't have the "S" cast in to them so I think they are quite different.

Also the compression is higher on the 1500. 9.2:1 vs 8.6:1

[oldy]

Thanks i have two engines that have lb.i have 1 that has la or l4 it must be a crap cast.one of the lb engines has bigger pistons
than the other.the engine i will be using has the s casted on the head and the smaller pistons so im picking its the 1500.
im about to order some std rings and big end bearings so i dont want to order the wrong parts.

[avenga]

Yes the 1500 has smaller pistons and the "S" head is only found on the 1500's so it does sound like you have a 1500 and a 1600.

I have all the piston sizes in my manuals so if you measure the pistons I can tell you what engine it is.

[oldy]

Ill measure the pistons at work tomorrow.couple of other questions.would a headgasket for a 1600 be allrite for the
1500 and would big end bearings for a 1600 fit in a 1500.        please say yes. as ive allready purchased these parts
because someone told me it was a 1600.

[NZTiger]

If your engine is the original colour, 1500's were painted dark blue and 1300/1600's are painted a lighter blue.  So a light blue LB is 1600...
The difference in the "S" head is in the casting shape around the valve spring seats. The way the non S head is made makes it difficult to change to double springs.
There is another aspect on the 1500 non S head is that the spring collars are very weak and if rev'ed hard, they will break. It happened to a mate of mine in 1978, he was a apprentice mechanic for a Todd dealer and was keen to go rallying, so built a car including a full engine rebuild, but started with a 1500 Super. He did the Westland rally and had a misfire with a stage to go. All the normal checks couldn't located the misfire so we removed the rocker cover to discover a broken value spring collar. Solution was to remove the push rod and he finished the rally on 3 cylinders...

[avenga]

So Miles the 1500 "S" head is the one to go for then? Was there any difference with the port sizes or anything between the 1500 "S" heads and the 1600 Alpine heads?

I have seen on a few of the Alpine 1600's with dual valve springs that they don't have the "S". The Haynes manual also says the "S" is only marked on the 1500 twin carbs and they dropped that mark in the 1600 twin carbs. Do the 1600 Twin Carb heads suffer from the same valve spring problems?

As far gaskets go I am pretty such they are the same. The manual says they are both marked LB and in my 1500 rebuild I used +.040 oversized bore which is almost the same size as a 1600's bore.

And with the big end bearing the manual says they are all the same. I got my crank in my 1500 polished and balanced and I got new bearings for it. I could ask my engine builder if he had to get any special bits for the 1500 but I think it was all standard.

[oldy]

Tried measuring pistons today but didnt have a micrometre big enough.id say its a 1500 so thanks for the info guys
that saved me alot of hassle.ill buy me rings on saturday if all goes well i should be rolling again on sunday which is
good cause im sick of driving me missus wagon.

[Paddy75]

Yep, on the block below the carburettor you see SB or LB. Then if you want to know if the engine is HC or LC...

[JoKer]

then what Paddy!

out with the ruler as already stated?

[oldschool]

I remember reading somewhere that all NZ Avengers had HC engines to take advantage of our 96 leaded petrol.

[Paddy75]

As far as I know the LC engine was only used in territories that only had low octane fuel or for countries with emissions regulations (Cricket was 1500cc LC therefore) and the Avenger engine was designed to produce low hydrocarbons without the need for an air-pump. This was achieved by a no-squish cumbustion chamber.
Again as often discussed Chrysler thought they were gonna sell loads of Averickets in N.America, and they could have if they spent $5 factory rustproofing them and the Yankees got the 1600 twin-downpipe '73 on engine.
That and apparently the dealers could make more money selling itchy-bushis.

The 1500LC could be ordered in the UK, Irl or Europe for use as a slow speed town car or often older people wanted an LC for fear of big-end problems.

The lack of squish mean't that Avengers were a little harder on consumption than (say) Leylands that had so much squish that even on a 1989 Austin Metro you'd see vapour coming from a hot exhaust!
So the 40kV coil does help the Ave/beam engine more than others.

I see the Pekayan Hunters and P405 RD's with the Avenger engine were modified to presumably give them squish. The piston crowns have a half sphere indentation that looks very like a Ford HighCompressionSwirl piston and some diffrences in the cylinder heads.
Anyhow there are diffrences in the valve throating (and therefore valve spring lengh) of the 1250/1500cc engine and the 1300/1600 units. The number cast on the heads can identify this.
The early 1250cc had a crt of 9:1, then 8.6:1 on the 1300/1600 MK1 with the crt going to 8.8:1 on the MK2's.

Nice job on the Ti type engine BTW, dear Santa, I've been a good boy this year....