LS/VTEC

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LS/VTEC

The Process continues...

Tapping the oil passage

Carefully thread the passage, making sure the thread is deep enough

After the passsage is threaded, tighten down the 1/8 plug with a allen wrench. Make sure the plug is completely threaded down and blow the head surface. If not, you may need to have a machine shop resurface the head until you get a completely flat surface

Close look on what the tap should look like, notices that the plug is a little below the head surface

Make sure the plug is completely threaded down and
blow the head surface. If it's not, you may need
to have a machine shop resurface the head until
you get a completely flat surface. Should not cost
no more then $90 for the head to be
resurface. Also you can choose to have the shop
weld the passage instead of tapping it yourself.

Relocating Dowel Pins
Milling new dowel holes

The B16a/B18c1 dowel pins is located on the
opposite side of the head as compared to the B18b/A heads.
So what needs to be done is relocate the dowel pins
from the Exhaust side dowel holes to the Intake side.
The dowel holes @ the intake side will need to be
mill to fit the dowel pins. Use the correct size
drill bit for dowel pins.
After the two holes have been milled, make sure all
metal shavings is removed. The B18b/a Non-VTEC head
gasket will line up perfectly with the dowel holes moved.
This should be a very straight forward procedure.

External Oil sending lines
Oil pressure Tee

Install the 1/8 flare to the 1/8BSPT adapter.

SS Lines connected to oil sending unit, Oil pressure sensor will connected at the end of the Tee

Cut the second SS lines about 10" to 12" inches long.
Make sure you use Teflon tape when connecting the 3 flare adapters
to the Tee and the 1/8BSPT adapter on the block.
As for the Oil pressure sensor, connect it to the end of the female
Tee fittings as illustrated in the pix
Additional details on Oil Lines Install
There are many ways of doing this. You may seen other instructions on how
to Tee the oil sending unit directly from the block.
But, I don't recommend Tee'ing the oil sending unit directly off the block.
Doing this could break and snap the fittings under harsh engine shacks & jerks.

ENDYN Articles On Oil Pressure Gauge Install

C/R (Compression Ratio) for the LS/VTEC
(B16a head on B18a/b block w/stock b18b rods) motor:

9.6:1 - P74 LS Pistons
10.0:1 - P72 GSR Pistons
10.8:1 - P73 US ITR Pistons
11.0:1 - P73 JDM ITR Pistons
11.5:1 - PR3 Pistons (1st Gen B16a)
11.7:1 - P30 Pistons (2nd Gen B16a)
12.4:1 - CTR Pistons

&

This is with the LS block with LS rods and a GSR (B18C1) head:

9.8:1 - P74 LS Pistons
10.2:1 - P72 GSR Pistons
11.0:1 - P73 US ITR Pistons
11.2:1 - P73 JDM ITR Pistons
11.7:1 - PR3 Pistons (1st Gen B16a)
11.9:1 - P30 Pistons (2nd Gen B16a)
12.6:1 - CTR Pistons

11.5:1 C/R is the "Safe" or target on 92+ oct street
pump gas.

*these numbers are rough estimates
Bojangz EZ B-Series CR Calculator

Next Time, we'll be swapping out the B18b1 slugs for some higher
Compression Ratio B'series VTEC pistons...

Slugs Swaps

Upcoming swaps setups included fabricating a single-
layer headgasket, & installing new ARP head bolts.