EFI connections 24x

[LT slow]

So how many of you guys have done this? Pros? Cons? Im HIGHLY debating on doing this when it comes time for my build this winter.

[Paulster2]

I think expense is the only downside to going that way. If you have the ching, go for it.

[Blubird]

I'm currently doing it right now.as posted above the only downside is the price,but it will end up paying for itself.especially since optis are 4-6 hundred in parts.and just imagine how great it would be to never have to tear apart the front of the motor again! And then you have better reliability and tuning.I've heard some people say they get a better throttle response also.to me it's win-win.yeah it does cost some money,but it's worth it

[blackbirdws6]

My complete setup is sitting in the box until I'm ready to build my new engine. Everything is high quality and honestly, the price is steep however I figure this to only be $1k more than I was intending on spending.

I assume a new harness and msd opti would run about $1k when I redid the engine so the price jump wasn't a big deal to me.

Tunability and getting rid of a potential weak link were my two big things. All the other benefits (possibly more power/response) are all icing on the cake.

Sent from my droid using Tapatalk

[Fastbird]

Guys, just remember, when you factor in price, compare it to a FAST XFI or the like. My XFI I've got well over $2K into, and if I had to do it over again, I'd have the EFI conversion in my car simply to drop the opti.

[LT slow]

Thats kinda what i was thinking, in the long run you would spend that and then some in opti's alone

[Neil350]

Never had an issue with optis, I did it for the tuning capabilities.

[LT slow]

Never had an issue with optis, I did it for the tuning capabilities.

Thats about the same reason im doing it. There is almost no one around that tunes LT1's around the ms area

[QC97Z]

+1 for tuning capabilities. I have it on my Procharged LT1. Plus, getting rid of the Opti is :D

[Colossus]

In MS you have to go to either Mobile, AL, Pensacola, FL, or Baton Rogue, LA. So yeah, no LT tuners to my knowledge. It was the worst part of having the LT1. One reason I went to the LS1.

[LT slow]

In MS you have to go to either Mobile, AL, Pensacola, FL, or Baton Rogue, LA. So yeah, no LT tuners to my knowledge. It was the worst part of having the LT1. One reason I went to the LS1.

RWTD, xxx motorsports nether one of them tune LT1 ether. The only one around is thunder racing. So yea im kinda stuck between a rock in a hard place.

[Ryan Stout]

Now with this you can keep stock gauges and all? How about with the FAST? Thats my main concern.

[LT slow]

Now with this you can keep stock gauges and all? How about with the FAST? Thats my main concern.

I know with EFI connections you can keep the stock gauges and all. Im not sure about the FAST setup.

[QC97Z]

+1. EFI connection preserves everything. All gauges work just like stock, you won't even realize its no longer an lt1 pcm.

[Phstratton]

Could you get better gas mileage w/ this?

[Blubird]

lol i think you would be better off saving your money for gas

[Phstratton]

Lol it was just a question. I'd do it for tuning capabilities and to get rid of the opti and have the gas mileage as a bonus :P

[eficonnection]

Could you get better gas mileage w/ this?

The LS1 PCM does have the ability to command an air/fuel ratio other than 14.7 for RPM/MAP range other than wide open throttle. In other words, you can command a leaner fuel mixture for highway speeds. This will help with fuel economy.

[Phstratton]

Wow I'm really interested in this, but it seems pretty hard to do all of the installation. Does it come w/ instructions?

[eficonnection]

Wow I'm really interested in this, but it seems pretty hard to do all of the installation. Does it come w/ instructions?

Instructions are available for everything but reworking your own engine harness. If we bring in a 4th gen this fall/winter, we plan on documenting the harness rework. Nothing to offer for reworking your own harness until then.

[Phstratton]

Instructions are available for everything but reworking your own engine harness. If we bring in a 4th gen this fall/winter, we plan on documenting the harness rework. Nothing to offer for reworking your own harness until then.

If you guys want a test vehicle I'll offer mine up :P

[Rob94hawk]

Instructions are available for everything but reworking your own engine harness. If we bring in a 4th gen this fall/winter, we plan on documenting the harness rework. Nothing to offer for reworking your own harness until then.

What do you mean by "reworking" your own engine harness? Splicing your own connections? Unless I'm understanding this wrong but don't you guys sell a plug and play harness?

Right now it's been 3 weeks since I ordered my new 95 timing cover from Jason Cromer for my vented opti conversion. I'm very close to calling him monday and canceling.

My engine is being rebuilt as we speak so here is your chance to sell this system to me EFI Connection!

My beef with this system is I'll need a starter tune with my heads/cam combo. Then I'll have to drive to get a dyno tune. Seems like this will add up quick.

[blackbirdws6]

Instructions are available for everything but reworking your own engine harness. If we bring in a 4th gen this fall/winter, we plan on documenting the

What do you mean by "reworking" your own engine harness? Splicing your own connections? Unless I'm understanding this wrong but don't you guys sell a plug and play harness?

Right now it's been 3 weeks since I ordered my new 95 timing cover from Jason Cromer for my vented opti conversion. I'm very close to calling him monday and canceling.

My engine is being rebuilt as we speak so here is your chance to sell this system to me EFI Connection!

My beef with this system is I'll need a starter tune with my heads/cam combo. Then I'll have to drive to get a dyno tune. Seems like this will add up quick.

They do sell a premade harness for a premium. I sprung for it to make my install much easier and get rid of my now 13 year old harness which may not be in the best of shape. It looks phenomenal btw.

Regarding the tune, I'm planning on sending my PCM to my tuner to make sure I have no issues before I hit the dyno. Based on my impressions of the kit and all the pieces, everything looks top notch.

[Phstratton]

I've already been tuned and have a cam/ported heads. If I went to the efi setup would I have to have it retuned? If so, who can do it for me?

[blackbirdws6]

I've already been tuned and have a cam/ported heads. If I went to the efi setup would I have to have it retuned? If so, who can do it for me?

Yes you would need to have it completely retuned with the LS1 PCM. Being that you will be on a LS computer, your tuning options are greatly opened up since many people are doing it. Look for a reputable shop with a good track record and you should be good.

[The SRZ]

Only downside I see is not having the ability to run a double roller chain. That's a BIG concern for high HP guys.

[blackbirdws6]

Only downside I see is not having the ability to run a double roller chain. That's a BIG concern for high HP guys.

Purchased their billet timing cover which is clearanced for a double roller.

[Fastbird]

Only downside I see is not having the ability to run a double roller chain. That's a BIG concern for high HP guys.

I wouldn't be so concerned about that. There's guys out there in the LSx world making TONS of power on single chain setups. I think people like to look at the timing set as a weak link but you rarely hear of one failing.

[blackbirdws6]

Only downside I see is not having the ability to run a double roller chain. That's a BIG concern for high HP guys.

I wouldn't be so concerned about that. There's guys out there in the LSx world making TONS of power on single chain setups. I think people like to look at the timing set as a weak link but you rarely hear of one failing.

Well said but as I mentioned earlier, you can run a double roller for this setup granted all of the critical measurements are there.

[Blubird]

Why can't you use a double roller with the stock cover ? I thought all lt1s were double roller

[LVZ2881]

Ali. I'm interested in checking out your set-up once you have it installed. This is an eventuall purchase for me, especially considering im halfway thru my first ever opti change, and to say its a PITA is an understatement.

[QC97Z]

Why can't you use a double roller with the stock cover ? I thought all lt1s were double roller

LT1's are NOT double roller. There are some companies that make double rollers, though. A double roller will fit behind the stock cover, but NOT if you have EFI Connection's setup. There is a crank reluctor that you install on the crank snout that ensures a double roller will not fit with a stock cover, unless the stock cover is machined for clearance, or you purchase the billet unit they offer.

I consider myself a HIGH HP application (600+RWHP) and I have an LT4 single roller unit. No problems.

[Blubird]

Ok cool I'll probably go single roller then.James not a problem,I'm trying to have it done by the end of the year

[Rob94hawk]

I don't know if this was mentioned in this thread but EFI Connections sells a billet timing chain cover for a double roller.

[Phstratton]

I don't know if this was mentioned in this thread but EFI Connections sells a billet timing chain cover for a double roller.

What exactly is a double roller?

[Blubird]

timing chain...

[LVZ2881]

double roller has two rows of links side by side instead of just one row..
they are heavier duty

[Phstratton]

double roller has two rows of links side by side instead of just one row..
they are heavier duty

Okay thanks. I don't know a lot of terminology yet :P

[The SRZ]

So you can run a double? Hmmm...I'll have to keep that in mind but my XFI will do for now. :D

[Phstratton]

What do you gain by running an electronic throttle body instead of a cable driven one?

[Joker Z28]

What do you gain by running an electronic throttle body instead of a cable driven one?

Slower response time by the motor

[Phstratton]

Slower response time by the motor

The electronic is slower?

[Blubird]

Slower response time by the motor

thats not true at all

[QC97Z]

thats not true at all

I believe that's true, but I don't think that the difference would be very noticable.

[LVZ2881]

Okay thanks. I don't know a lot of terminology yet :P

thats ok, best way to learn is ask questions.

[Blubird]

Well my daily driver has electronic throttle and I don't notice a difference other than the feel of it.and throttle response doesn't feel any different than a cable driven one.yeah if it is slower it's not noticeable at all

[ScottKnight]

Slower response time by the motor
Nice misinfo there. :shame:

The DBW system is perfectly capable of opening the throttle blade as fast as you can step on the pedal. Learn to manage torque management before you spout off useless drivel like this.

[eficonnection]

Electronic throttle is VERY responsive.

Some vehicle calibrations (like a 2009 Express Van we rented a year ago) are lazy and can be corrected in the tune.

Do you really expect that the GTO, G8, Gen 5 Camaro, and all 1997-newer Corvette are equipped with a sluggish throttle system?

[ScottKnight]

Sorry, the troll threw me off topic there for a moment. The only con I can possibly come up with is that I wasn't satisfied with just re-pinning my existing harness, which snowballed into relocating the PCM inside the cabin and creating an entirely new wiring harness from scratch. :shiner:

The list of pros is long and there are multiple discussions on multiple forums on the topic. I couldn't be happier with my setup and recommend it to anyone that is not willing to swap the LTx out for an LS-based driveline. Oh, yeah, here is mine:
http://www.impalassforum.com/vBulletin/showthread.php?t=243104

[faust]

ok heres my ? what about pulling codes . my 95 is obd1 with the obd2 style connector so do i now need to get a obd2 code reader . also i would assume that my scanmaster lt1 will be no good. i'm damn close to pulling the trigger. oh and while i'm think about it will the #13 pinout we use for tach signal still work or need to be moved and does it need a tach signal adapter

[eficonnection]

ok heres my ? what about pulling codes . my 95 is obd1 with the obd2 style connector so do i now need to get a obd2 code reader . also i would assume that my scanmaster lt1 will be no good. i'm damn close to pulling the trigger. oh and while i'm think about it will the #13 pinout we use for tach signal still work or need to be moved and does it need a tach signal adapter

Even though your 95 car has an OBDII connector, it is not pinned for OBDII diagnostics.

When we build a new 93-95 F-Body harness, we include a new OBDII diagnostic connector on the harness.

Because the LS1 PCM is OBDII, you will need an OBDII scan tool to retrieve codes.

I'm not familiar with the "#13 pinout" for the tach.

The LS1 PCM tach signal will work with the 4th Gen F-Body instrument cluster. It requries a simple PCM calibration update. All gauges will remain functional.

[QC97Z]

And your scanmaster LT1 will not work, because it is only good for OBD I.

[ItSSlowZ28]

i had been planning on using this set-up to run a Gen I sbc in my z28 with my built Performabuilt 4L60e that i already have. i happened to see on the eficonnection site that the earlier 4L60e's won't work with the set-up, which means i'd either have to have my built trans rebuilt with new internal electronics or get a stand-alone transmission controller, which means another $700+. it really disappoints me because i was looking forward to doing it and just having the LS1 computer control everything in a simple way, but it looks now like it isn't so simple or as cheap as i was hoping

[QC97Z]

Well, you gotta start somewhere. EFI Connection has done worlds for the LT1/SBC/BBC crowd with what they currently provide. I'm sure they are doing the R&D to address issues like this. This hasn't been offered for all that long...give them some time ;)

[eficonnection]

i had been planning on using this set-up to run a Gen I sbc in my z28 with my built Performabuilt 4L60e that i already have. i happened to see on the eficonnection site that the earlier 4L60e's won't work with the set-up, which means i'd either have to have my built trans rebuilt with new internal electronics or get a stand-alone transmission controller, which means another $700+. it really disappoints me because i was looking forward to doing it and just having the LS1 computer control everything in a simple way, but it looks now like it isn't so simple or as cheap as i was hoping

I wouldn't dismiss the LS1 PCM because you have an early 4L60E. Updating a 94-95 4L60E to 96-newer electronics does not require a transmission rebuild. As I understand it, you're looking at a valvebody swap, electronic solenoids swap, and internal harness.

We'll have to document this next year.

[ItSSlowZ28]

I wouldn't dismiss the LS1 PCM because you have an early 4L60E. Updating a 94-95 4L60E to 96-newer electronics does not require a transmission rebuild. As I understand it, you're looking at a valvebody swap, electronic solenoids swap, and internal harness.

We'll have to document this next year.
when it comes time to order parts i'll look into this with a couple local shops. if there's anything i can do to help you guys out like a parts list, ball park price, or anything else let me know