Well the day has come guys.
I have looked into this and I am going to have a few hold ups but the swap will start as early as this weekend or early next week/
I priced an LSJ head gasket and it is $36, there are some differences between the L61 and LSJ head gaskets but for the most part they are about 99% the same.
The only difference is wherer the blcok is closed deck right around the sleeves the LSJ head gasket has little cuts but they do not penetrate through the gasket so you can say it is for additional cooling since it is a 3 piece head gasket the cut are only in 1st and 3rd part not in the middle layer so I am just gonna use the LSJ gasket.

1st one of the problems is going to be the spark plugs, I am not using the stock Iridiums I am gonna go with Autolites that are one degree colder and I am calling NGK to see if they have a 2 step colder one available or something.

2nd problem is the coils.
I see some people that have extensive knowledge of coils and stuff hooking up their MSD so here is a question??
On the L61 motor you have 2 coils and on the LSJ you have 4.
Regarless on the number of coils the firing order is the same 1-3-4-2, so that is good and they are both waste spark which is also good.
So if the LSJ motor is waste spark as well in 720 degrees of rotation which is 2 full turns on the crank you have 4 wasted sparks. So in the L61 motor you have one coil fire for both #1 and #4, and since the LSJ works the same way you have 2 coils fire but they fire at the same time.
Now could I hook #1 and #4 coil of the LSJ motor to 1st coil output on the L61 and #2 and #3 coils from LSJ on the 2nd L61 coil, theoreticlly it shoud work, no??

I am going to my Chevy guys and I am going to get wiring diagrams for both motors for the coil parts like what wires are what so I can connect and splice unless someone has this available.
I know there has to be Trigger 1 and 2, Coil + and -, and power and ground. anything else??

I am gonna polish the casting off the exhaust ports for the hell of it, and the head will have a cam sensor that will not do a damn thing until I get an engine management.

So the problem is going to be getting the coils to work, and I am going to have to use our ICM as well, so wiring that basterd in as well.
Head as most of you know has sodium filled exhaust valves factory, cam sensor, and individual coils from what is different than the L61 head.
Also, lets not forget stronger #1 and #4 combustion chambers for 500+ hp range since it is sand cast and not lost foam so that I don't have to stud above the chambers to keep my head gaskets intact and head from warpping.

In next month I am going to get single valve springs, TI retainers, machined keepers, and solid lifters, so I can rev it past 7500 RPM.
Cams, AEM EMS, and equal length manifold later.

So wish me luck and for the ones that want to see I will try to get the last dyno sheets up tomorrow, and we will see if this LSJ head is any better flowing than L61 head.
All the head components are the same between the 2 motors.
If anyone has a solution to me wiring the coils and getting them to work I will love to hear it.
Thanks
SunCavi


Best time:"""11.946""" @ 114.73 mph @17psi 1.83--60"
11 second daily driver!!!!
Race Related 727-561-9440
Shop of choice for your 11 second J body!

Also, built bottom end and or top end LSJ and L61's available.
13's ----12's ----11's ----10's

As far as the coils your thinking seems logical, although Im sure you could use the L61 coils, or just run msd coils and msd spark wires and not worry about any of it

on the L61 ignition setup theres 4 wires that go into the idi coil pack thing coil control for 1,4 - coil control for 2,3 - ignition voltage, and the cam sync signal, i have no idea what kinda cam sync signal the LSJ uses, i dont know whether it has a sensor like most motors or if its like most ecotecs and uses a reference to when the 4th plug is firing to determine position

if its a case where they use a sensor you just wire that output into the icm, if that doesnt work unhook the wire that goes to the PCM from the ICM with that signal and hook it up similar to how the msd is hooked up to an eco with the camsync generator part

I only know how the L61 works I cant say much about the LSJ the ignition is completely different



1989 Turbo Trans Am #82, 2007 Cobalt SS G85

use the 2.2 coils , trying to get the individual coils to work will be alotta work for nothing

atleast tell you get to thestand alone stage


take pics of the swap and let us know how it all goes

Rodimus it has a cam position sensor sitting on the exhaust cam thanks for the description on the L61 wiring now I need the LSJ description so that I can start messing around. lol
Thanks guys.

Yes this time I will take pics, of my head swap, I never take any pics do I??


Best time:"""11.946""" @ 114.73 mph @17psi 1.83--60"
11 second daily driver!!!!
Race Related 727-561-9440
Shop of choice for your 11 second J body!

Also, built bottom end and or top end LSJ and L61's available.
13's ----12's ----11's ----10's

sun cavi... I am using a complete msd ignition... I think that if you were to dot he same thing rodimus did for me.. well and myself.... you could just follow his how to on his site...

if this head flows more.. I am DEF. going to swap... and then some turbo cams too....

lemme know big boi!!



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Well you guys are gonna have to wait for the dyno numbers and whatnot. 1st lol
I will deff let you guys know what's cookin.



Best time:"""11.946""" @ 114.73 mph @17psi 1.83--60"
11 second daily driver!!!!
Race Related 727-561-9440
Shop of choice for your 11 second J body!

Also, built bottom end and or top end LSJ and L61's available.
13's ----12's ----11's ----10's

I just called NGK and there are available 2 step colder spark plugs for LSJ motor and the part number is BKR7EIX or 2667, so there is some useful info for the Cobalt friends.



Best time:"""11.946""" @ 114.73 mph @17psi 1.83--60"
11 second daily driver!!!!
Race Related 727-561-9440
Shop of choice for your 11 second J body!

Also, built bottom end and or top end LSJ and L61's available.
13's ----12's ----11's ----10's

Ok just found out that the Cobalts ARE sequential fire not a waste spark, BUT you can run them as waste the only problems I am gonna have is emissions and a little rougher on a cold start. Pfffffffttt... Big deal.

Also, another nice thing to know, cams on these motor DO have different specs, I am gonna try and find out how they differ. Lift and duration wise.
Also, they have no overlap unlike N/A cams, they acctually have negative overlap. lol

So will the head swap help I guess it might, or just bragging rights, anyways I am doing it, going to buy the head gasket as we speak.
And of course get the wiring schematics for the coils



Best time:"""11.946""" @ 114.73 mph @17psi 1.83--60"
11 second daily driver!!!!
Race Related 727-561-9440
Shop of choice for your 11 second J body!

Also, built bottom end and or top end LSJ and L61's available.
13's ----12's ----11's ----10's

i know the actually openings of the intake and exhaust ports are almost identical to the 2.2

wether the vavle pockets are different , i dont know


ive got a 2.0 sitting in the garage , and also working for a header company also helps with know the port sizes are very close

shoulda also said

port size doesnt always effect flow #'s , since the whole port can be different in other areas

Well if you're going to use the lsj head, why not get the head from a 9-3 aero. The aero uses a higher lift cam than the standard lsj.

good luck

sound good

have you finnaly decied to use aem?


"Kick azz is my boost hero!!! "

Well I am not worried about the cams I am gonna get some monstrosities and my 1st miles with this head are going to be with the stock ECU so there goes for the bigger cams right off the bat.
I will get those eventually.

I think the ports look the same and @!#$ but the cams might be different.

Will most likely use the AEM Jcavi.
BTW, I just got the diagrams from the both LSJ and L61 coil wiring and there is a way to wire them.
Also, firing order on the 2 motors is NOT the same so I don't know if that is going to be a problem.
LSJ is 1342 and L61 I think is 1432 or something. ;(




Best time:"""11.946""" @ 114.73 mph @17psi 1.83--60"
11 second daily driver!!!!
Race Related 727-561-9440
Shop of choice for your 11 second J body!

Also, built bottom end and or top end LSJ and L61's available.
13's ----12's ----11's ----10's

I know I have my coil packs wired to the wires as 1 and 3 and 2 and 4 I believe or 1 and 4 and 2 and 3 because they fire at the same timre...


I can change the 2 plug wires on the same coil back and forth it doesnt matter... so as long as they use the same coils it wouldnt matter...



LE61T PTE6262 Powered

as far as i know all 4 eco tecs are the same 1342

the 2.0 , 2.2 , 2.4 and 2.0 DI turbo

I dont understand, get some non-machined o-rings...I personally know a kid that pushed 22psi into his 2.4 with a cometic head gasket and no-machining-needed o-rings and didnt have a problem. That would help that problem with the L61 head, put the cams you want into the stock head, and port and polish it, and in the end, you KNOW it will work, with much less headaches. O well, you like challenges, wont blame ya for that. But anyways, good luck.

Ok FstCavy, I think I know what I am talking about a little more here.
You are pretty young yet so confident.

I will keep the L61 head if you can answer me one question and here it is!!
What good will any head gasket do weather it is stock (MLS) Cometic, SCE, Copper, O-ringed or not, whatever if your head starts distorting and lifting off the block due to too much pressure in the combustion chambers 1 and 4 and a design with a flaw from factory??
I don't think you understand what the problem with the head is to be able to throw such a irrelevent piece of information in your last post about O-ringing and 2.4L motors.

If I can't keep my head fastened to the block even with ARP's, I can't make HP can I??

Trust me here I know what I am doing and why I am doing this.
Don't get mad now, before you jump the gun and start questioning me do a little more reading on Ecotec motors and then ask a question, please don't doubt my knowledge and reffer to me like some dumb a**.
I understand you have a LD9 and all and your head might not do that but then again when it the last time someone threw 500 hp to the LD9 motor after Mike Karas and Johnny Mack??

This is roughly happening close to that level of HP and if I am surpassing it I think it is easier to swap to a LSJ head then drill and tap studs above the #1 and 4 CC and putting TQ down on them to prvent them from lifting and then still NOT have a cam angle sensor to make the AEM work.



Best time:"""11.946""" @ 114.73 mph @17psi 1.83--60"
11 second daily driver!!!!
Race Related 727-561-9440
Shop of choice for your 11 second J body!

Also, built bottom end and or top end LSJ and L61's available.
13's ----12's ----11's ----10's

hmm that is surprising the GM build book made it like the rods were the only part that needed replaced to 400hp, then the head gasket goes, guess its not that strong



1989 Turbo Trans Am #82, 2007 Cobalt SS G85

Wooah....never meant to touch a soft spot, I didnt read it clearly, I scanned it fast and thought you were saying it was blowing out by the 1 & 4 cyl. I will be the first one to admit, I know absolutly nothing about the L61 or the LSJ, and I deffinatly wasnt meaning to sound like your a dumba$$, I just wanted to fully understand why you were going through all of these headaches over swapping to a different head versus building the stock head. From your post it seemed liek you were going through A LOT of obsticles to get it to work, and when i read it, it just seem...da%m, hes going through a lot of trouble to reach your goal. But anyways, taht was my bad. I didnt know that the factory L61 head actually distorts and raises off of the block by 1&4 cylinders, cant ya put some JB Weld around there? That should seal 'er up Or possibly some metal banding around the whole block and up over the head, strap her down!! Just kidding, keep up the good work.

hurry up jasmin!



LE61T PTE6262 Powered

Rodimus you are right if you are saying that the head gasket goes!!
Now tell me whay would the head gasket go?? and that answers your question.
It goes cause at 1st you start lifting a little by little making the head gasket mess up for the most part.

Soft spot or not, now you can brag about knowing a little something about L61's and LSJ's.

Phil, I have no competition so I got all the time. lol Ordered the head gasket yesterday and it was like $64 but it won't be coming in untill like next Wednesday so I am not even thinking about tearing it apart till I get it so at least Wednesday, but once I start you know I finish it quick.



Best time:"""11.946""" @ 114.73 mph @17psi 1.83--60"
11 second daily driver!!!!
Race Related 727-561-9440
Shop of choice for your 11 second J body!

Also, built bottom end and or top end LSJ and L61's available.
13's ----12's ----11's ----10's

yeah you finish a lot of things quick...



OH SNAP!!!!!


I am just very interested to see if this head increases power...

are you using the l61 cams?or swapping the entire ehad over including cams?

if so will the cams work with our cam gears and power steering pump?



LE61T PTE6262 Powered

How can 1-4-3-2 be right? If thats true, then the LSJ cams wont work on the L61....... Double check the fire orders, I'm going to say their both 1-3-2-4 (GM also lists the L61 as 1-3-2-4..... so not sure where you got your info... 2.2 Eco Specs)

get crackin Yas........ just make sure you get correct info




SPD RCR Z - '02 Z24 420whp
SLO GOAT - '04 GTO 305whp
W41 BOI - '78 Buick Opel Isuzu W41 Swap

brian you are right... I just checked my msd and my 1 and 4 coil are on the ends and 2 and 3 coils are in the middle (regarding plug wires) regardless my msd doesnt work... though my 1 interface module was bad turned out it was arching so bad it melted the module and must have shorted the coil pack



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