Foximus

iTrader: (13)

So, as some of you know, I scored that sweet deal on a brand new LSJ head. I want to mount it to my L61 for next years road race engine. Planning to talk to mr B to see what his suggestions are for valvetrain parts, but what all will I need to do to make it happy on the L61?

I guess I need a 2006 LSJ coil pack setup? Or can I make a L61 set fit?

Do I need the LSJ valvecover as well?

Trying to figure what stuff I have laying around as spares that I can use, vs what I can sell.

Thanks guys.

royce777

iTrader: (29)

i believe axelthered did a lsj swap in his l61 so he may have some useful information.

Slowbalt2000

iTrader: (1)

Yes you will need the vc and possibly the coil packs and the user is

Axelthered05 i believe

Foximus

iTrader: (13)

Yeah, we talked, but aside from Valve cover and LSJ coilpacks, i was not sure if anyone knew of other parts we had to change or rewire.

Axelthered05

iTrader: (9)

use all lsj valve train parts except the cams, use l61 cams or you will need a retune also you need LSJ spark plugs I suggest getting a colder heat range
Drill and tap the lsj coolant temp sensor hole with 1/4 npt and plug it


if you use the l61 cams you will need to use a cam nub to fill the hole so you keep good oil pressure in the head then drill and tap the cam end cap to hold the cam nub






you will have to remove the top of the coil pack and you will have to machine 2 nubs under where the coil pack will go and machine the coil cover to accept the heat sink of the L61 coil pack. you can not use the lsj coils as our coil pack also acts as a cam position sensor and the car will not start without the cam signal

Axelthered05

iTrader: (9)

https://www.cobaltss.net/forums/adva...-build-306004/

Axelthered05

iTrader: (9)

here is a pic of the the lsj head with the l61 cams and cam nub. the nub is held in place by a locking screw and works great

Slowbalt2000

iTrader: (1)

I didnt realize your car used the icm until just now axel...

that kinda sucks for you guys having only trifecta. Fox, werent you thinking about going a different route for tuning? I realize this is kind of off topic lol


and for the record idk about the 05-06 cars but my 07 runs fine without the cam sensor

Axelthered05

iTrader: (9)

mines an 06, the 07 models use the E37 computer and 05-06 use the dreaded E16A computer that only trifecta supports so i can only speak for the 05-06

ml2242

07+ can use LS2Edit for Tuning... just need to find someone who can do it.

I had Trifecta for 2 months after my SC swap in 2009. Absolute ****. Had it dynotuned on LS2Edit and it was like a brand new car.

Slowbalt2000

iTrader: (1)

Hptuners is what i use.