Last updated:  6th March 2009

Basic VL Turbo head information factory standard.
Same engine as Nissan TI 3.0 alloy head, RB30E block

Intake: 1.657" x 4.944" x 0.274"	(7mm)
Stem Lock recess length:	0.09"
Stem lock recess dia:		0.214"

Exhaust: 1.383" x 4.896" x 0.313" 	(5/16")
Stem lock recess length:	0.09"
Stem lock recess dia:		0.216"

Springs are dual, lengths indicated are free unsprung.

Inside spring:	Length:	1.70"
		OD:	0.97"
		ID:	0.72"
		Turns:	7.9 (approx)

Outside spring:	Length:	2.05"
		OD:	1.33"
		ID:	0.99"
		Turns:	7.75 (approx)

Existing retainers steel,
		Outer spring thickness:	0.08"	(dia 1.3")
		Inner spring thickness:	0.16"	(2nd step 0.971")
		Lock matching length:	0.40"	(locater 0.61")

Valve locks steel:	Length:	0.276"


Injector Data:-
---------------
Car    Part Number        Flow Rate
VL     0 280 150 135    147.4 gms/min
VLT    0 280 150 166    185.7 gms/min


ECU Data:-
-----------
Car    Bosch Part       GMH (Holden) Part  Trans   Designation   Comments
VL     9 260 060 002    92031689           Manual  3EM  (50)     Standard
VLT    9 260 060 003    92031692ND         Auto    3TA  (53)     With Detonation circuit board

Note 1:
Some VLT ECU's from Holden Wise office in Northcote Melbourne had
a Bosch yellow/red label with the number EX 260003 "Factory Exchange"

Note 2:
The Auto ECU could be used on a manual but not easily the other way around.
The Bin data from the Turbo Ecu could be used in the non turbo auto but
detonation circuit would be ineffective.


Oil Pump Gear thickness Data:-
------------------------------

 VL has gear thickness of approx 12mm
VLT has gear thickness of approx 14.8mm
GTR has gear thickness of approx 16mm

It is suggested that the flats on the oil pump for the GTR
dont quite match the slats on the crank for the VL/VLT so there
is some chance they can strip if you put the GTR on the VL/VLT,
I have still to check this, so dont quote me ;)


Detonation bypass modification to Turbo ECU to stop error code 34
-----------------------------------------------------------------
In reference to pictures:- "ECU_Detonation..." and "ECU_lights..."

Resistor is 1/4w carbon or metal film value     470K  Ohms and
connects to the 8th pin from the right hand side.
ie. White wire to switch on 1st pin, resistor on 8th pin, cant
recall what precise ECU connector numbers these are but refer to photo.

Note: All the bypass toggle switch does is connect the resistor
to the detonation input of the ECU, it relies on the sensor
having been removed from the engine loom. I could have done it
as a proper bypass but didnt want to cut into the connector.
Its fine for me as it is for country economy, I'll be looking at
a better method of providing retard on boost to get back that
little extra power even before pinging occurs.



Comments re Cam timing belt for n/a and turbo RB30 engines
----------------------------------------------------------
This is what it says verbatim on page 6A-19 of Volume 6 of
"3.0ET Turbocharged Engine and Associated Components"


Note: Some issues of Volume 2, Section 6A 'Engine
Mechanical' show the incorrect number of grooves in the
drive belt between the crankshaft tooth gear and
camshaft drive gear. There should be 53 grooves for
3.0E and 3.0ET engines, refer Fig. 6A-29a