Ltcc conversion benefits?
12-02-2015, 03:01 PM
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Re: Ltcc conversion benefits?
The weak point of the LT1 engine is the Optispark distributor. Combining the optical cam position sensor in the same body as the high voltage distribution, placing it directly under the water pump, and having to use an oil seal to isolate it from the timing set left it vulnerable to both internal and external damage.
If you remove the high voltage function from the Opti, most of the problems go away. You are left with an extremely precise cam position sensor that allows the PCM to set ignition timing and sequential injector timing (sequential not use on the 93) to maximize performance, while minimizing emissions.
The Bailey LTCC module connects to the optical cam position sensor, and is able to drive 8 individual LS1-style coils in direct fire... no moving parts. You now keep a deadly accurate cam position, and gain the benefits of a much stronger ignition system.
I've been running a similar system (not the LTCC - but using only the optical cam position sensor, and driving 8 LS1 coils) for 15 years, absolutely trouble free. This was done before the LTCC was available, and was extremely costly. The LTCC makes this available for much lower cost.
You gain the greatest benefit in very high HP, high RPM setups... mine is an 800HP nitrous motor, a buddy used the system on a 1,125HP forced induction LT1. For a stock or near stock LT1, the Opti provides a totally adequate ignition system, except for the reliability issue. Some people have run their original Opti for 200,000 miles, without problems. Others have replaced the Opti a half-dozen times. 95-97 "vented" units are somewhat more reliable than the 93-94 unvented units.
To install the LTCC, in addition to the module with control wires, you need to get 8 LS1 coils (used are cheap and reliable), find a way to mount them (mine are mounted with about $10 worth of steel threaded rod and bars), get a new set of ignition wires.
If you remove the high voltage function from the Opti, most of the problems go away. You are left with an extremely precise cam position sensor that allows the PCM to set ignition timing and sequential injector timing (sequential not use on the 93) to maximize performance, while minimizing emissions.
The Bailey LTCC module connects to the optical cam position sensor, and is able to drive 8 individual LS1-style coils in direct fire... no moving parts. You now keep a deadly accurate cam position, and gain the benefits of a much stronger ignition system.
I've been running a similar system (not the LTCC - but using only the optical cam position sensor, and driving 8 LS1 coils) for 15 years, absolutely trouble free. This was done before the LTCC was available, and was extremely costly. The LTCC makes this available for much lower cost.
You gain the greatest benefit in very high HP, high RPM setups... mine is an 800HP nitrous motor, a buddy used the system on a 1,125HP forced induction LT1. For a stock or near stock LT1, the Opti provides a totally adequate ignition system, except for the reliability issue. Some people have run their original Opti for 200,000 miles, without problems. Others have replaced the Opti a half-dozen times. 95-97 "vented" units are somewhat more reliable than the 93-94 unvented units.
To install the LTCC, in addition to the module with control wires, you need to get 8 LS1 coils (used are cheap and reliable), find a way to mount them (mine are mounted with about $10 worth of steel threaded rod and bars), get a new set of ignition wires.
Last edited by Injuneer; 12-02-2015 at 03:04 PM.
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