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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Opti Eliminator preview...

 
Old 02-17-2011, 08:45 PM
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Here are some mock up type pictures so you guys can visualize what I'm doing. The cam sensor will have an aluminum bracket that will be set up by me for the correct airgap and aligned for TDC. Also pictured is the signal converter that will make the stock pcm happy with nice, consistant square wave signals. Sorry it's a frigid 40 degrees outside right now, so just imagine the big crank trigger wheel and sensor on the balancer with a powdercoated bracket

Originally Posted by Wicked94Z View Post
Yes it will still utilize the optispark as a distributor, but I believe an aftermarket cap & rotor will not have any reliability issues unless some of you are running HVC II coils on a stock computer

The only "difficult" part of this was finding the right high quality electronics capable of delivering the very high resolution the LT1 PCM needs. I believe I have gotten the combination correct, and will begin testing on a local stock LT1 in the next month or so. This will be similar to the design of the original Electromotive kit from ~10 years ago, however my design will give both the high and low resolution signals for trouble-free sequential injection.

Another application I see for this is relatively low cost EFI retrofitting to a traditional sbc/bbc considering an LT1 PCM and harness can be had for less than 150 dollars. I have a compatible reluctor and pickup for a traditional distributor in the works, but not as far along as the opti replacement setup.

Tentative pricing for this setup will be ~550 dollars, which would include a new non-optispark base unit, msd cap/rotor, and all bracketry, sensors, reluctors, wiring harness, etc.

Last edited by Wicked94Z; 02-27-2011 at 05:49 PM.
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Old 02-17-2011, 08:46 PM
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Ohhhh my please get this done by about August that would be nice
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Old 02-17-2011, 08:53 PM
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Are those for a mag pickup? Can you take a pic with a size reference like a dollar bill or a cell phone or something? The teeth on the big wheel look kind of shallow to me but it is hard to tell.
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Old 02-17-2011, 08:55 PM
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Originally Posted by 05HD View Post
Are those for a mag pickup? Can you take a pic with a size reference like a dollar bill or a cell phone or something? The teeth on the big wheel look kind of shallow to me but it is hard to tell.
You do know that is a raised panel garage door the parts are propped up against dont you?
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Old 02-17-2011, 08:59 PM
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Originally Posted by wrd1972 View Post
You do know that is a raised panel garage door the parts are propped up against dont you?
Yeah. What is your point?

There is no size reference in the picture unless you happen to have the dimensions on the panels of his garage door.
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Old 02-17-2011, 09:02 PM
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The parts arnt that big its and Opti eliminator so figure about the size of an opti

Just a guess though
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Old 02-17-2011, 09:05 PM
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Originally Posted by Lawhead View Post
The parts arnt that big its and Opti eliminator so figure about the size of an opti

Just a guess though
My perception is that the big one is about the size of the crank pulley, given the three holes in it.
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Old 02-17-2011, 09:10 PM
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the teeth are shallow but it'll provide a great waveform. The sensor has a very small (.01") pickup on it and it does fine up to 50kHz or so. The big wheel is ~8" in diameter the smaller wheels will fit inside an opti.
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Old 02-17-2011, 09:17 PM
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So is it going to have a digital or analog signal? Any idea on price?
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Old 02-17-2011, 09:22 PM
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the pcm will get the digital signals like it wants, I have a signal conditioner to get the square waves.
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Old 02-17-2011, 09:57 PM
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Originally Posted by killerz97 View Post
So is it going to have a digital or analog signal? Any idea on price?
Pricing is still a tentative ~550 for the whole setup.
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Old 02-17-2011, 10:00 PM
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i'm in for a finished product! guaranteed
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Old 02-17-2011, 10:31 PM
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Such an awesome price for something this promising! i wish i didnt have to replace my opti asap last week... i woulda loved to be a guinea pig for your set up wicked im sure i will be one day tho
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Old 02-18-2011, 12:01 AM
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Looks good!! the big wheel going to mount on the dampner? I'll be your guinea pig!! although I maybe pulling my motor back out soon, LMK when you have a little spare time, id like to get a second opinon on my issue... sorry for the little ...
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Old 02-18-2011, 12:08 AM
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if this works, count me in
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Old 02-18-2011, 07:29 AM
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Great news!!! When are these going to be available is the question everyone wants to know? Im putting my motor in come spring time and would love to have this setup on it and having not to have to touch that bloddy opti for a long long long time!
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Old 02-18-2011, 08:15 AM
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Awesome, wish this would have been around 10yrs back. Goodluck. Later Clint
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Old 02-18-2011, 10:14 AM
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I'm getting a damn red x for the pic. Could you email it to me? Might be interested as my motor is out of the car at the moment lol

[email protected]
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Old 02-18-2011, 10:20 AM
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I wouldn't want to spend all that money and have to worry about the opti at higher rpms. Couple hundred more and you are at an efi conn. setup with 8 coils.
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Old 02-18-2011, 10:28 AM
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Im getting my new motor in two weeks.. I would be down to throw this in and give it a try.. would obviously pay for parts..
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