schwoch1

You just have to change the front cover to the newer style w/ crank sensor and add the 24X crank sensor. Will work like a charm on any year LT1!!!

Mike

S10Wildside

93-95 LT1 engines will need...
- 96-97 timing cover
- 96-97 crank key (GM# 12550096)
- 96-97 hub (or mill the early hub for proper belt alignment)

On the flip side, 95-97 LT1 engines will need to push in the camshaft pin that was used to drive the optispark.

You know Mike, my 03 Siliverado SS only gets about 13mpg. Maybe it needs an LT1/4L60E (Ha!)

schwoch1

And my '71 has the aerodynamics of a Barn door in the breeze, I had to check the numbers twice just to make sure. I am sure the the 3.08 rear axle ratio has something to do with it!

Mike

Puck

iTrader: (17)

Lol, excuse my language, but to summerize: ****! . I just bought a 95 timing cover for my 93!!! LMAO .

Oh well, for 25 bucks it was a steal anyway.

I am still trying to figure out which way I'm going, since I have to ditch this 93 computer by any means neccesary...keep my current working opti/cap and run some sort of MS3 system piggybacked, use your conversion and sell my splined opti/MSD cap then purchase a 96-97 timing cover, or get a newer style opti and keep my 95 cover then have the opti innards modded for the "other", less clean LS1 conversion. I admit I like your idea of a seperate crank and cam wheels better.

Decisions, decisions! Will keep my eyes on this, looks great so far.

S10Wildside

A big thanks to Mike (schwoch1) in Wisconsin for sharing videos of his 24x LT1 installation progress. Mike sent a few videos of the engine running on the dyno. The engine may be hooked up to the water brake this week to apply load.

Keep in mind that Mike is using a calibration that we are using on our test stand. It's rough at best and needs a lot of work. However, you'd hardly know it seeing this engine run.

First QuickTime Video
Second QuickTime Video
Third QuickTime Video

Mike purchased:
- 24x LT1 crank reluctor
- he had a 24x crank sensor
- 24x LT1 conversion harness (stand alone type for his pickup truck...which works well for the dyno)
- cam sensor, housing, and target
- 96-97 LT1 crank key (GM# 12550096)
- used LS type coils (truck coils I think)

His comments have been:
- it fired up first try
- throttle response is perceived as better than with the original electronics
- a few emissions trouble codes have set (fuel level, fuel sensor, AIR pump, skip shift...all need to be disabled in the calibration)

Hey Mike - do you have anything to add?

Mike
EFI Connection

T/ALT1

iTrader: (3)

This is great news and I will buy one of these setups to see how well it works on a 383LT1, 10 second streetcar and then see how far into the 9's on n2o. Later

zigroid

iTrader: (22)

Please forgive me if I am asking questions that have already been answered...

What would need to be done for a gen I SBC swap in to an LT1 car with this LS1/LT1 hybrid setup? as much as I love LT1s, I would love more to have a 400+ cube SBC, be able to use SBC heads without having to convert them, same with SBC intakes. what would be even more cool is to run the SBC with a relatively inexpensive EFI and be able to have an easy to setup and use harness/pcm. would it operate the factory gauges? could I use a 4L60E behind it and still be able to operate the transmission electronically? that would be sweet!

GrnDragon

iTrader: (4)

I'm trying to round up all the parts to run this on my car with a 10-12psi F-1A and I think I already have a 2 Bar MAP but cannot 100% tell from the information I found on the web.
It has the Orange connector Plug, it has a sticker on the bottom side that has the numbers 3352 and S95097 MADE IN USA. Does anyone know if this is a 2 Bar? There are no other markings on it.
Thanks

S10Wildside

The $525 24x Early Small Block Package at http://www.eficonnection.com/eficonn..._cylinder.aspx
24x crank reluctor
24x crank sensor
Vortec Timing Cover
Vortec Distributor w/ Sealed Cap

Yes, fully.

Yes, but must be 96-newer internal wiring and solenoids.

zigroid

iTrader: (22)

der guess I should have read your site haha.

that is sweet. what do you mean about the 96-newer internal wiring and solenoids? are you saying I would need a newer transmission from a 96+ car?

S10Wildside

The early 4L60E is not the same (wiring and solenoids internally) as the 96 and newer 4L60E. Any transmission shop can update the early 4L60E.

schwoch1

You would need to run a TCC PWM solenoid if your valve body does not have one (94 and some 95's) and you need to run the later ('96 on up) 3-2 downshift solenoid. You also have to use the '96 on up wiring harness if your trans is a '94 or '95. I have not tried this yet, but I got the info from some very reliable sources(professional trans builder in a high perf shop, builds at least 2 700R4 and 4L60E's a day). I will be doing this in my 4L60E very shortly and will have feedback. The computer is looking for the correct resistance with the TCC solenoid and the newer 3-2 solenoid is a different resistance than the early ones, so hence a MIL would flag if you use the wrong solenoid!
Hope this helps!!

Mike

T/ALT1

iTrader: (3)

Too bad you guys didn't come up with this a few months back before I built this expensive 383LT1 b/c I would have definately built a traditonal SBC with over 400cubic inches for the same amount of cash then just used this setup for the fuel injection. Well there is always a forsale section....

BlackTA96

iTrader: (3)

What do you do about the wiring harness?
Do you just modify the LT1 harness?
What all needs to be modified?

schwoch1

I bought a ready made harness from EFI Connection, although my setup is an engine swap so it made more sense to go that route.

You can repin the LT1 harness and put the LS1 PCM ends on it, the LS1 and LT1 use the same pins on the harness going onto the PCM, just the plugs are different. You would have to make an overlay harness for the coils, since the LT1 harness never had the wiring for them. Would take a good 5 or 6 hours to get it done.
I belive EFI connection makes a plug and play harness for the F bodies for this swap, you would have to contact him on this though!

Hope this helps

Mike

blownbird355

What trips the cam sensor? Hope this makes sense didn't know of another way to word it.

lifeisgood

iTrader: (4)

thats not our only weak link...... our heads suck. no matter how good the aftermarket lt1 heads are, they still cant hold **** compared to the lsx designed heads.

S10Wildside

It's a target that bolts to the front of the cam sprocket (includes button head bolts to replace the original sprocket bolts). It reads through the aluminum cam sensor housing.

We have tested the cam target to the equivalent of 12,000 (yes, twelve thousand) engine RPMs to determine that it maintains a proper duty cycle and will be reliable at any engine speed.

S10Wildside

There has been some misunderstanding and confusion regarding the 24x LT1 package. The $525 package includes all of the components to equip a 96-97 LT1 with the 24x crank and 1x cam signals. This includes:

• 24x LT1 Crank Reluctor
• 24x Crank Sensor (required and not the same as the 96-97 crank sensor)
• Cam Sensor
• Cam Sensor Housing
• 1x Cam Sensor Target and attaching Bolts

Consider a high quality optispark replacement at $500.
Some wiring DIYers may find EFI Connection's 24x LT1 package a bargain to replace the LT1 ignition system and not opt for just a better optispark unit. With a good LS tuner, you've got a fuel management system that can run circles around the LT1's original electronics.

"Do you have a package for..."
If we were to offer a package for every possible LT1 combination from 1992-1997, we would have [6 years X 7 different LT1 cars X 2 different transmissions...and so on]. For this reason, we're offering a base package at a discounted price. Most of the other items are available through EFI Connection.

92-95 LT1 engines will also need:

• 96-97 timing cover
• 96-97 crank key (that locates the crank sprocket and crank reluctor)
• 96-97 crank hub or mill down the early hub the thickness of the crank reluctor

Introducing the LS1 PCM means introducing a different engine harness.
You can:

• modify your existing LT1 harness (EFI Connection stocks all of the harness pieces needed, but not a step-by-step procedure)
• order a new plug and play 24x LT1 f-body harness from EFI Connection (uses the LS1 PCM)

ABS and Traction Control
Introducing the LS1 PCM means removing the LT1 PCM signals to the ABS/TCS systems. This may mean both ABS and TCS are disabled.

zigroid

iTrader: (22)

what is keeping you from getting a BBC to run under this system?