EFI connection 24x conversion

I would like to get all the information I can on this. Bottom dollar cost. I have access to the LSX coils from a 5.3 or a 6.0 truck. I can pick up a LS1 PCM, if thats the case then all I need is a bare bones kit for $525 dollars. Then modify my wiring harness, but my question is how do I modify it and is there instructions to do this. I have an extra wiring harness from a 95 LT1, but mine is a 96 LT1 is there a major difference in the two harnesses. I am trying to find the cheapest way I can do this, because if I can do this for around $700-800 dollars then I believe this is the way I am going to go, instead on converting to an complete LS1......I have another short block with a spun rod bearing......I can get it machined and buy a stroker kit etc. cheaper than buying a LS1 and doing all the conversion stuff and then having to build that motor. I have a pretty good H/C/I take package that made 381 RWHP. If I do this then I am thinking for around $4000 grand I could have a good 383 short block built. What would you guys think.....stay LT1 and go this route or convert to a LS1 dollars wise which do you think is the easiest conversion and the cheapest.

Sorry if I have asked stupid questions, some friends of mine are trying to get me to convert to LS1, but I just want to go the cheapest route to get the numbers I am hoping for.

Come on guys, I know people have thoughts about this, I want some information.......

The cheapest route will be the LSpcm swap. If you go put an LSx motor in your car, you'll need the LS k member (or new mounts made since they are different between the two motors), a new transmission, since the bellhousing bolt patterns and input shafts are different.

We don't know what you are hoping for, but in the end, it's all really up to you.

What I am hoping for is the best performance for the best money, Like I said I already have a good head, intake and cam package. Therefore I think this efi 24x conversion is the best route for me to go. I agree just changing to a LS1 it will needed modded, k- member etc.....basically I think going the efi 24x route I can build a short block to get the performance I would get from a built LS1 for less money. Am I thinking wrong or am I right.

Im using the 24x setup on my PT88 355 build. the rewiring took some time since I made my own harness from the LT1 and and LS1 harnesses. I had and LS1 PCm sitting around so all I needed to buy was the actual reluctor kit and a set of coils. I think I have $600 in mine? havent really had any time to get it on the street. it has a start up tune in it but it seems to be working great.

I rework the stock harness for the 24x conversion starting at $318.20 including return shipping. If any repairs are needed its as little as $5.50 per new connector :cool:

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Originally Posted by Pro-jection Eng

I rework the stock harness for the 24x conversion starting at $318.20 including return shipping. If any repairs are needed its as little as $5.50 per new connector :cool:

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Do you do this for 93 harnesses as well?

And do you say take off things that aren't being used. (for example I'm not using air/egr/abs/evap)

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Originally Posted by Pro-jection Eng

I rework the stock harness for the 24x conversion starting at $318.20 including return shipping. If any repairs are needed its as little as $5.50 per new connector :cool:

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I have a spare 95 wiring harness....will it work with this so I can keep my 96 intact.....or what....

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Originally Posted by Pro-jection Eng

I rework the stock harness for the 24x conversion starting at $318.20 including return shipping. If any repairs are needed its as little as $5.50 per new connector :cool:

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So If I send you a stock harness and you rework it.
All I would need is an ls1 pcm and coils?
That way I get rid of the opti and be open to all the other tuning shit?

If thats the case, that is awesome. Pricey but awesome.

Steve did my conversion wiring and a few other goodies. All TOP NOTCH!

Use truck coils they are way easier to mount and an 01-02 PCM.

Im using EFI Live and a Custom OS that I can tell you more about if interested.

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Originally Posted by Joker Z28

So If I send you a stock harness and you rework it.
All I would need is an ls1 pcm and coils?
That way I get rid of the opti and be open to all the other tuning shit?

If thats the case, that is awesome. Pricey but awesome.

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You will need the kit from EFI Connection which costs 535 as well...

Well I think go this route may be better than doing a complete LS1 conversion.....hey if I can build a good little forged LT1 short block and put my stuff in it and run low 11s on motor and then spray it and run low 10s.....I'll be good to go.

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Originally Posted by Z28pr0jekt

Do you do this for 93 harnesses as well?

And do you say take off things that aren't being used. (for example I'm not using air/egr/abs/evap)

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Sorry I can't convert a 93 harness. if you can pick a 94 harness i can make it 99% plug n play including a new obdII dlc. yep i can delete anything you want, and i have a few options for running extra connections such a tps voltage or coil 1 signal for nitrous guys

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Originally Posted by GM MUSLE

I have a spare 95 wiring harness....will it work with this so I can keep my 96 intact.....or what....

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there are 2 different 95 harnesses, they changed to the obdII style wiring mid-year. is a little more work and cost to convert an earlier style harness

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Originally Posted by Joker Z28

So If I send you a stock harness and you rework it.
All I would need is an ls1 pcm and coils?
That way I get rid of the opti and be open to all the other tuning shit?

If thats the case, that is awesome. Pricey but awesome.

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Like gregrob said, you'd still need EFIConnections proprietary 24x components. Not sure what ya mean by pricey? EFIConnections charges 850 for their harness which has a 12 week build time. I can have your harness back in your hands in 7-10 days :cool:

Well to buy the kit is like 535, plus reworking my stock harness is another 300 something dollars. LS1 PCMs are usually found for around 100, plus the coils another 200 or so. If I am doing my math right, that is $1135+

once the 24x conversion is done can hp tuners be used to tune?

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Originally Posted by 94transamltx

once the 24x conversion is done can hp tuners be used to tune?

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Yes

so im hearing its definatly worth it then, cause i have hp tuners avaliable, idk if i gotta pull motor out n put a reluctor or what but i emailed projection engineering but thats probly for harness only???lots of questions im 100% in on this

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Originally Posted by Pro-jection Eng

I rework the stock harness for the 24x conversion starting at $318.20 including return shipping. If any repairs are needed its as little as $5.50 per new connector :cool:

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I tried to call you with the number on the web site but I got a wrong number, I'm interested in a harness and any info u have to do a conversion to 24x

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Originally Posted by 94transamltx

I tried to call you with the number on the web site but I got a wrong number, I'm interested in a harness and any info u have to do a conversion to 24x

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once you have the harness done its a fairly straight foreword process.
here is a link to there site with all the info
http://www.eficonnection.com/eficonnection/24x.aspx

So I need the harness, ecu I have, coils n brackets, timing cover with water pump drive....anything else?

http://www.eficonnection.com/eficonn...spx?ItemId=797
http://www.eficonnection.com/eficonn...spx?ItemId=796

this

so it looks like the 24x conversion kit with the 96-97 lt1 kit $490, and crank key, harness, coils?
sorry for the tons of questions just trying to get it all together before i start my parts bin lol

im looking everything over and i see that once you get the timing cover off you have the reluctor inside the cover and the sensor goes through the cover to the reluctor, and put it all back together, lol if anyone wants to talk to me bout this 3197505322 i feel dumb posting questions all the time

maybe this will help some
Attachment 10434
Attachment 10435

Yes that may help ty

so have you done the swap?

no, i have not done it yet, i am still waiting on my new harness and i will be putting the 24x on my new engine.

Sounds ur a lil ahead of me, keep me updated on ur build

around November i should be installing the 24x. so still got some time till i get it running.

If I was that far I'd be so happy

So how much better is the 24x over the LTCC. I know its been a while since I posted in here but I am looking to do the upgrade. I am thinking the LTCC would be better for what I need. How much better is the tuning for the LS1 over the LT1 computers? Is there that much of a significance in potential power gain?

Depends if u enjoy mailing your ecu in or opening your hp tuners and do it yourself, that's nice

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Originally Posted by Joker Z28

So how much better is the 24x over the LTCC. I know its been a while since I posted in here but I am looking to do the upgrade. I am thinking the LTCC would be better for what I need. How much better is the tuning for the LS1 over the LT1 computers? Is there that much of a significance in potential power gain?

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if i remember correctly the LTCC still keeps the opti for signal where the 24x compleatly removes it. also the Gen III LS computer is arguably the best/most tuner friendly stock ECM. opens up tuning to any shop that can tune LS engines.

I understand that with the LTCC the opti pretty much becomes an expensive cam sensor, but other then that the only real major thing is the tuning. So if I was able to find someone who can tune LT1 OBD2 it wouldnt be worth spending the extra $$$ on the LS1 pcm correct?

Ok got confused on the different setups

no need to be confused go with the 24x system....ltcc still keeps the opti..and ls1 pcm's can be tune almost anywhere now

So again, the biggest advantage is tuning capabilities correct? I dont do my own tuning I would take it to a shop. But I found a place that does LT1 tuning not too far from here. So I am thinking the LTCC might be a better option form me.

yes, one of the main advantages is the tuning capabilities, since the tuners out there that tune LTs are slowly dwindling this opens up a hole new world for tuning, also if im not mistaken the LS computer can get better more exact tunes. though from what i have seen more people with FI engines see more benefits from it then NA engines. and with the 24x the opti is COMPLEATLY removed. but it dose have a hefty price tag on it. i picked up a lot of parts 2ed hand and i think i still payed around $1800 with a new harness. i wish i could help more with comparenson to the LTCC but i have never seen one run with that set up. i have heard that people have had signal problems with the opti with the LTCC. on the "other" site there are a few threads talking about the 24x that go a lot more in to detail. i know there are a few people over here that have it done already hopefully they can chime in.

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Originally Posted by Joker Z28

So again, the biggest advantage is tuning capabilities correct? I dont do my own tuning I would take it to a shop. But I found a place that does LT1 tuning not too far from here. So I am thinking the LTCC might be a better option form me.

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That and especially for nitrous the 0411 pcm is light years faster than the ltx pcm. For example- spray a dry before the mass air on an LT1 pcm and BOOM. Its not fast enough to compensate. However, on a 0411 pcm you can and the pcm will correct the fueling in time. There are many advantages to the swap.

1. No opti
2. Faster PCM
3. Better Tuning Capabilites
4. custom operating systems
5. I had a perfect running LT1 and after the 24x I noticed better fuel economy and driveability. H/C/I cc306.

If you decide to make the swap, let me know. I just became a site sponsor and I can build you a new harness, rework your old one, or supply you with whatever you need to diy the swap. The LTCC is great, and unless you are going to be changing set ups, going FI, Nitrous, or something extreme the LTCC will probably suite you fine. Just hard to find a OBDII LTX tuner anymore.