Estimated Pricing:
$800.00 Plug-and-Play Replacement LT1 Engine Harness
$275.00 24x Crank Reluctor
$100.00 24x Crank Sensor
$200.00 LS Coils (set of 8)
$75.00 LS1 PCM (used - street price)

That's $1,450.00 so far.

Add to that the cost of the cam sensor, housing, and target. Let's speculate those will be under $300.

You'll need to come up with coil brackets and a coil harness. (EFI Connection makes coil harnesses and sells the pieces to build your own)

You'll also need a 96-97 LT1 timing cover for the crank sensor.

You'll also need a tune.

So it looks like the 24x LT1 conversion may be in the $2,000 range. Much less for the do-it-yourselfer and a little more for the guy who doesn't have fabricating skills (coil brackets) and tuning skills (EFILive and so on).

And make that under $3,000 if you're also buying EFILive and a nice Innovate LM-2 Wideband controller.

With a RoadRunner real-time LS1 PCM you're now closer to $3500. At this point you've taken the system to the extreme.

Also keep in mind that EFI Connection is going to offer some sort of package pricing.

So the 24x LT1 package would...
- use all GM sensors (convenient and affordable to replace)
- use an inexpensive PCM (convenient and affordable to replace)
- retain most functionality in car (A/C system, etc)
- eliminate the optispark forever
- offer real-time tuning

 

Sorry if I missed an answer to this question, I have a 1994 with the OBD1 port, could the LS1 PCM be tuned through that port or would one need to install a OBD2 port?

 

just swap to the righ port there are thosands at the wreaking yards... you could possibly make a custom cable for efi live but i would just swap the port.

 

its seems like rather than paying 2-3k for an LS1 pcm it might almost be more cost effective for us LT1 guys to do a complete LS1 swap.

 

You'll want to use an OBDII diagnostic connector. The 94 Camaro harness pictured several posts ago has the connector in the harness near the dash connectors. It's long enough to be mounted in the location of the OBDI connector (which can be removed).

The 96-97 cars will already have the OBDII connector.

These OBDII connector pigtails are avilable in the pigtail sections of http://www.eficonnection.com.

 

Are you sure?
- front engine cradle
- engine
- transmission (or adapter)
- exhaust changes
- radiator changes
- power steering changes
- wiring harness (or harness modifications)

 

Yeah it wouldn't be to hard to find a wrecked LS1 parts car for 2-4K to get everything you need. Then if you sell off all your LT1 stuff and all that you don't need off the LS1 and it really makes it a feasible mod.

 

is the crank sensor (not the wheel) a off the self unit? can you get it out of another vehicle? is it the same as the vortech 454 one? or are you the only source for the sensor? the wheel i would be fine with as it wont wear out but it would suck to have 2000$ in something and not be able to get a sensor down the road..

 

Read your own post.

 

Well.. for us people that have invested a lot of money on the longblock, well, its not an option. I had thought about it and If i were to install anything at all would have been an ls7 with the same supercharger. I have already done the setup with awesome results of 801rwhp on pump gas.

But. I have the same potential here to do the same thing and all i needed was the ls1 pcm. A LOT cheaper.

 

my question was in no way implying that what i was trying failed or suceeded.. just wondering about the sensor that efi connection uses


i did however have my setup firing injectors and coils on the bench.. problem being i got a crank sensor error. it may be due to the fact that i was spinning it with a cordless drill with electric brake (stops instanly) or it could be that i am only feeding 5v pulse to the computer and not sure if it requires a 5v pulse or 12v pulse. i can ouput either or i just need to know what is needed. without a ls1 to test its hard get this info. it could also just need a crank relearn.

i do know my setup should run a engine just how well is to be seen yet..

 

Its a GM crank sensor. 1999-2000 C6500 and C7500 trucks.

And for the LT1 conversion, it uses an LS2/LS3/LS7/etc cam sensor. Regardless of the conversion (early small block Chevy or LT1/LT4), all sensors are readily available through GM.

 

i figured out the problem with the crank signal code. aparently when my friend cut the disk he made the one slot into 2 slots by accident. i have rectified the problem and the crank signal problems have gone away. i will put it on the car this week if it stays somewhat warm. if this works i will have less than 300$ total into this whole setup including pcm, harness, coils, custom wheel ect...

i also had to rewire the optical sensor to output 12v square wave signal instead of the 3v pulse it was putting out.

this one disk ouputs both cam and crank signals from inside a modified optispark

 

Very clever and nice work.

Most everyone I have talked with about pulling the crank signal from the cam have had the following concerns...

• GM never did it that way
• true crank position is unknown and changing over time due to timing chain wear
• radical cams may provide an inconsistent crank signal

Further regarding the optispark...

• prone to corrosion, ruining even the optical signal

The LS1 PCM is actively monitoring crank position to detect misfire. I would question the accuracy of any misfire DTC that may set.

 

That was the idea that I had given to S10 Wildside and I favored his view of the way it was done...

I get to loose the opti.