Rank: Veteran
Groups: Registered, Veteran
Joined: 3/08/2007(UTC)
Posts: 1,902
|
Got a VJ prefix 304 and was just wondering how the long motor differs from a 308 blue motor (apart from bore x stroke)
did they have a better set of conrods?
Wanted : HJ statesman Rear venetian blind aus wide |
Old holdens brought on the spot, quick decision, cash paid. |
|
|
|
|
|
Rank: Veteran
Groups: Moderator, Registered, Veteran
Joined: 1/03/2005(UTC)
Posts: 14,820
Thanks: 1 times
Was thanked: 535 time(s) in 510 post(s)
|
Heads have bigger valves and deshrouding around the valves plus hardened seats for ULP. I think the valve deshrouding is one way the compression was lowered for ULP. AFAIK they had the same X rods (like VK, similar to L34) until the A9L (VL Group A) then as far as I know all 304 engines past that time had the A9L style rods. So basically heads, rods, crank and pistons are different to 308 blue.
_______________________________________________________
If we all had the same (good) taste, who would buy all the Fords? |
_______________________________________________________
If we all had the same (good) taste, who would buy all the Fords? |
|
|
|
|
|
Rank: Veteran
Groups: Moderator, Registered, Veteran
Joined: 2/03/2005(UTC)
Posts: 3,135
Thanks: 1 times
Was thanked: 35 time(s) in 33 post(s)
|
The inlet is the equivalent of the VH/VK HDT big port one - same '955 part number, but with with a 4-hole flange where the carby bolts on (unlike the open flange on the HDT ones).
VH with the V5H engine, VH SS 5L, VK V5H engines, VK manuals from '85 onwards, and late VK autos got the L34 type rods, and these continued in the VL 304. A9L rods were only factory fitted to VL Group As.
Pistons in the VL motor have a dish in the centre of them - about 50mm in diamter by a few mm deep, which drops the compression.
Heads are big-vlave, like the VH & VK B-cast heads - only the exhaust valve seats are hardened (induction).
Block is still the same (all black 5L are trimatic pattern though).
Crank is still the same as VK 304, which is actually the same casting as the 308 blue, but with the big-ends offset ground to reduce the stroke slightly - this is why your crank will still have 308 cast into it (like the early EFI ones do too).
A blue 308 crank will drop into a VL 304, and everything will still bolt up to it.
Cheers,
Mick
_______________________________________________________________
Judge a successful man not on how he treats his peers, but on how he treats those less fortunate. |
Cheers,
Mick
_______________________________________________________________
Judge a successful man not on how he treats his peers, but on how he treats those less fortunate. |
|
|
|
|
|
Rank: Veteran
Groups: Moderator, Registered, Veteran
Joined: 1/03/2005(UTC)
Posts: 14,820
Thanks: 1 times
Was thanked: 535 time(s) in 510 post(s)
|
And the statement I meant to write at the bottom was "Mick will be able to tell you exactly what is different"!!!
Mick, I remember reading somewhere that VL heads weren't decked once the valves were deshrouded, hence gave even lower compression. True or myth?
_______________________________________________________
If we all had the same (good) taste, who would buy all the Fords? |
_______________________________________________________
If we all had the same (good) taste, who would buy all the Fords? |
|
|
|
|
|
Rank: Veteran
Groups: Moderator, Registered, Veteran
Joined: 2/03/2005(UTC)
Posts: 3,135
Thanks: 1 times
Was thanked: 35 time(s) in 33 post(s)
|
Nothing different in the head's deck dimensions - drop them on a blue 308 and there's no change.
Cheers,
Mick
_______________________________________________________________
Judge a successful man not on how he treats his peers, but on how he treats those less fortunate. |
Cheers,
Mick
_______________________________________________________________
Judge a successful man not on how he treats his peers, but on how he treats those less fortunate. |
|
|
|
|
|
Forum Jump
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.
