im looking at a 'GTR' head for sale... dunno what it really is tho.
has numbers 2811930. also another stamping on it is F2 and i cant make out the other bit as they arent clear pics.
anyone have any info?
GTR Head
Started by
_SLR_6_
, Aug 31 2007 07:29 PM
6 replies to this topic
#2
Bazza
-
- Members
-
- 4,295 posts
ǝɹnʇxıɟ ɯnɹoɟ
- Location:Outer Melb West Vic
- Car:ɐuɐɹoʇ
- Joined: 11-November 05
Posted 31 August 2007 - 07:37 PM
HI
I think you will find that there is no difference between an LJ GTR head and any other LJ 202 head. The number you have quoted is correct for both.
Bazza
I think you will find that there is no difference between an LJ GTR head and any other LJ 202 head. The number you have quoted is correct for both.
Bazza
#3
_threeblindmice_
_threeblindmice_
-
- Guests
Posted 02 September 2007 - 09:44 AM
Don't the high compression and low compression heads have different numbers one ending in 29. And did the GTR have a high compression head??
#4
frash da bucket
-
- Members
-
- 1,890 posts
Forum Fixture
- Location:NSW
- Joined: 23-April 07
Posted 02 September 2007 - 10:28 AM
Hi threeblindmice,the 2811930 is the high compresson head,cheers.
#5
_XUI202_
_XUI202_
-
- Guests
Posted 10 September 2007 - 09:44 PM
if 2811930 is a gtr hi comp head why do they have a l at the back of the head?
were a 2811929 has a h at the back of the head???
thanks robert
were a 2811929 has a h at the back of the head???
thanks robert
#6
_debbiedavid_
_debbiedavid_
-
- Guests
Posted 10 September 2007 - 09:54 PM
Back of the head has the cast date
Cheers Dave
Cheers Dave
#7
Dr Terry
-
- Moderators
-
- 3,325 posts
Technical + Numbers Guru + Moderator
- Location:Eastwood (Sydney) NSW
- Joined: 13-November 05
Posted 11 September 2007 - 04:31 PM
Hi Guys.
This high-comp & low-comp thing pops up all the time, it goes like this.
The 2811930 head is the open chamber head that is fitted to the normal (high-comp) 202. A low-comp 202 also uses the same head, but uses pistons with a larger dish to achieve the lower compression.
A normal (high-comp) 173 uses the 2811929 closed chamber head, but the low-comp 173 uses the 2811930 (open chambered) head. So the H & L castings only have any real meaning when fitted to the smaller (173) engine. The L casting is the open chambered head & results in the lower comp ratio, the H gives a high comp ratio.
Dr Terry.
This high-comp & low-comp thing pops up all the time, it goes like this.
The 2811930 head is the open chamber head that is fitted to the normal (high-comp) 202. A low-comp 202 also uses the same head, but uses pistons with a larger dish to achieve the lower compression.
A normal (high-comp) 173 uses the 2811929 closed chamber head, but the low-comp 173 uses the 2811930 (open chambered) head. So the H & L castings only have any real meaning when fitted to the smaller (173) engine. The L casting is the open chambered head & results in the lower comp ratio, the H gives a high comp ratio.
Dr Terry.
1 user(s) are reading this topic
0 members, 1 guests, 0 anonymous users
