ls2 into a ls1 car..info needed

[maccavvy]

Hi chaps.

whats the score on ls2 into a ls1. will the manifolds ,wiring ,ecu , throttle body , mine cable operated fit .

or is it a major job .

any info appreciated.

[Mud_]

maccavvy said:

Hi chaps.

whats the score on ls2 into a ls1. will the manifolds ,wiring ,ecu , throttle body , mine cable operated fit .

or is it a major job .

any info appreciated.

Do you have any ls1 bits to help? I assume things would be easier of you can retain the valley plate (with knock sensors), intake and throttle body (3 bolt style with cable), injectors (different connector and length), and probably other bits I'm not thinking of.

Is the ls2 a 24x reluctor? Are the ls1 injectors up to feeding a stock ls2?

You'll want a tune anyway, so some aftermarket bits might be an idea.

[maccavvy]

mine is an ls1 so ill have all parts..

been offered a ls2 with some mods. will come with ecu etc.

I was hoping to fit the bare engine . swap over my throttle body and manifolds.
the ecu will have a tune in it .. can I use this or need to get my oe ecu tuned .

thanks btw

[Mud_]

maccavvy said:

mine is an ls1 so ill have all parts..

been offered a ls2 with some mods. will come with ecu etc.

I was hoping to fit the bare engine . swap over my throttle body and manifolds.
the ecu will have a tune in it .. can I use this or need to get my oe ecu tuned .

thanks btw

I'm pussy-footing until someone like monkfish pops on, but I would keep the LS1B ECU you have (different connectors and OS to LS2) and tune that to make life easy...I don't know about swapping the LS2 ECU in, but you would need to correct for things like the LS1 injectors if you carried those over. On balance it may be easier to take the LS2 intake and injectors/fuel rail and get either a TB adapter or just a cheap 4-bolt TB, but the LS6 intake you have is better. The plugs on the injectors can be adapted or just cut off and changed. Not sure if that's also true of the knock sensors.

[MyM8V8]

maccavvy said:

mine is an ls1 so ill have all parts..

been offered a ls2 with some mods. will come with ecu etc.

I was hoping to fit the bare engine . swap over my throttle body and manifolds.
the ecu will have a tune in it .. can I use this or need to get my oe ecu tuned .

thanks btw

Use the LS1 ECU, much better to tune than an E40. You just need to alter the loom for the knock sensors which on the LS1 is in the valley whereas on the LS2 are on each side of the block behind the exhausts. Also the MAP sensor is at the opposite end, and other bits, but easily doable IMHO. You could also ditch the LS2 intake and get a FAST 92 or something. The LS6 on the Monaro should be the LS6 version which is a better unit than the LS2 apparently.

[maccavvy]

So keep my ecu and tune that

Swap wiring about for injectors and knock sensors

But use my original ls1 manifold
Not going to the expense of a fast intake

[Mud_]

maccavvy said:

So keep my ecu and tune that

Swap wiring about for injectors and knock sensors

But use my original ls1 manifold
Not going to the expense of a fast intake

To use the LS2 injectors on the LS1 (LS6 really) intake with LS1 fuel rail I think you'll need adapters - LS2 injectors are 48mm and LS1 are 60mm (IIRC). You might be surprised what the adapters cost (and they add more potential leak points, although manageable I'm sure)...aftermarket rails may work and cost similar. The o-ring at the bottom of the injector is bigger for the LS2 application. The LS2 data is good and can be interpolated nicely into the LS1B tables though, so no tuning problem there.

Are you running the LS2 MAF? Adapters are available (but another thing to tune). You could even go to the LS3 card style MAF, although if you're keeping the diddy LS1 TB it may not add much.

edit: find some LS3 heads, intake, injectors, rails, big cable TB - you know it makes sense!

Edited by Mud_ on Saturday 4th June 16:50

[maccavvy]

Getting confused between ls6 and ls1 etc etc.

Can I use my ls1 rails manifold and injectors

Or best to use ls2 stuff and modify

I have the face-lift throttle body and maf that fits in the pipe.

[vxr2010]

I know people technically understand the above , I would have thought it's cheaper and more reliable and less hassle to mod the ls1 , it sounds like a lot of work , ls1 new heads cam etc even a stroke kit or a re bore sounds like less work , just my thoughts

[ringram]

Depends where its from. Is it a 24x crank or 58x is the question.

If its 24x then its a drop in if you have cable extenders. LS1tech has loads of info on it.
You can also run a lingenfelter adapter to turn a 58x into a 24x if needs be.

But you will need to keep your LS1 ECU as it interfaces with the other CAN devices like BCM etc. Taking it out will cause you more problems than its worth.

Google and ls1tech are your friends. Just look at a gen4 into gen3 kit. Exhaust and intake will be in basically the same place. But throttle is 90mm vs 75mm

If you are selling your LS1 to offset the cost then cool. Otherwise as mentioned cam only ls1 will beat a ls2 there is only about 30 or 40rwhp difference.

[Mud_]

I assumed there was something wrong with the LS1 to make it worthwhile, but the major benefit from the LS2 block has to be the option of LS3 heads and intake

[maccavvy]

The ls2 has been modified with a cam and ls7 clutch..my ls1 is standard apart from the larger throttle body and headers.

Was gonna sell the ls1 to offset yes.

An engine swap is easy job.but what else is needed...some wiring needs extending that's simple. Just wanted to know what other pitfalls I may come across
What's this 24x or 58x thing
Can I use my injectors manifolds etc
Thanks guys so far. All your time is appreciated

[ringram]

use the ls2 intake, though arguably a fast or ls3 would be better.

[maccavvy]

So use the ls2 intake..What's the best way with injectors and fuel rails then.

What about the throttle body ?

[jameshsv]

If you dont mind me asking whats the cost of the ls2 slightly modified engine and whats been modified as it maybe cheaper just to modify your ls1 engine

Edited by jameshsv on Saturday 4th June 23:03

[Behold81]

Injector information can be updated in to the ls1b ecu easily and the coil information (I run the slim line coils on my ls1)

The knock sensors could be easier left in the valley. A new ls6 plate is cheap enough so you can still sell the ls1.

You just need a cable driven TB on the ls2 if it's not one already.

All easy to do with a bit of thought.

[MyM8V8]

Behold81 said:

Injector information can be updated in to the ls1b ecu easily and the coil information (I run the slim line coils on my ls1)

The knock sensors could be easier left in the valley.................

All easy to do with a bit of thought.

He's fitting an LS2, the knock sensors are in the side of the block on an LS2. Not difficult to adapt though.

AS Ringram said. If you use the LS2 intake you don't have to fart about with injector adaptors as you will retain those and the LS2 fuel rail.

Is it worth doing??? I'd say so, its something I had considered in the past.

[Mud_]

I just struggle with the notion of the poxy LS1 TB through a poxy adapter onto the poxy LS2 intake...at least get a new 4-bolt TB...

[MyM8V8]

Mud_ said:

I just struggle with the notion of the poxy LS1 TB through a poxy adapter onto the poxy LS2 intake...at least get a new 4-bolt TB...

He should have the Ls2 TB and he is on FBW with the facelift anyway.

[Mud_]

MyM8V8 said:

He should have the Ls2 TB and he is on FBW with the facelift anyway.

Says cable operated in the OP, I thought this was an 04