Goodbye Opti! LT1 runs w/ coil packs and LS1 PCM.
#181
On The Tree
#182
- 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!)
#183
On The Tree
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
#184
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.
#185
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
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
Last edited by S10Wildside; 02-09-2009 at 05:16 AM.
#187
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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!
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!
#188
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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
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
#189
24x crank reluctor
24x crank sensor
Vortec Timing Cover
Vortec Distributor w/ Sealed Cap
would it operate the factory gauges?
could I use a 4L60E behind it and still be able to operate the transmission electronically?
#190
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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?
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?
#191
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.
#192
On The Tree
Hope this helps!!
Mike
#193
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....
#195
On The Tree
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
#198
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.
#199
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:
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:
Introducing the LS1 PCM means introducing a different engine harness.
You can:
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.
- 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.
Last edited by S10Wildside; 02-10-2009 at 07:39 PM.