Quote:
Provide a plug-in, optional, rev-limiter and retard subsystem.
Tom Piper
This is why I went LTCC, I would have used the delteq had they provided these functions! The Delteq is a cleaner install.Originally Posted by Tom Piper
A suggestion for Delteq:Provide a plug-in, optional, rev-limiter and retard subsystem.
Tom Piper
Quote:
The Delteq uses four coils in an inductive discharge fashion.
The advantage of multiple coils is this allows more "dwell" time.
Inductive discharge with sufficient dwell time is superior to Capacitive Discharge.
For high-rpms, single coil inductive discharge systems don't have enough dwell time.
I would never consider putting a CD system on a multiple-coil inductive discharge system. I would much rather find a standalone rev limiter and retard, if needed.
A suggestion for Delteq:
Provide a plug-in, optional, rev-limiter and retard subsystem.
Tom Piper
Hi Tom already two steps ahead of you (sorry can't talk baout it .... Originally Posted by Tom Piper
I believe the MSD is a CD (capacitive discharge) system.The Delteq uses four coils in an inductive discharge fashion.
The advantage of multiple coils is this allows more "dwell" time.
Inductive discharge with sufficient dwell time is superior to Capacitive Discharge.
For high-rpms, single coil inductive discharge systems don't have enough dwell time.
I would never consider putting a CD system on a multiple-coil inductive discharge system. I would much rather find a standalone rev limiter and retard, if needed.
A suggestion for Delteq:
Provide a plug-in, optional, rev-limiter and retard subsystem.
Tom Piper
Maldo-
What happened to stage 2 of the Delteq? Last I heard it was being tested and would be out in a few months... That was April. It was listed on their site, but it's been taken off for a few months now... Any word?
What happened to stage 2 of the Delteq? Last I heard it was being tested and would be out in a few months... That was April. It was listed on their site, but it's been taken off for a few months now... Any word?
Quote:
What happened to stage 2 of the Delteq? Last I heard it was being tested and would be out in a few months... That was April. It was listed on their site, but it's been taken off for a few months now... Any word?
Replacing the Opti-Spark low-resolution and high-resolution pulses is not an easy thing to do.Originally Posted by ninetyfivevette
Maldo-What happened to stage 2 of the Delteq? Last I heard it was being tested and would be out in a few months... That was April. It was listed on their site, but it's been taken off for a few months now... Any word?
The OEM ECM requires these pulses, so any replacement component is going to have to faithfully reproduce these pulses. And, to be able to do this from the crankshaft instead of the camshaft (which is the desirable way to go) is not easy.
Since the LT1/LT4 crankshaft does not have a key for the hub and it is not easy for the average person to *accurately* find top-dead-center with the aluminum heads on the engine (in aluminum heads, a piston-stop inserted into the spark plug hole has a tendency to move somewhat because the piston-stop is almost at a right angle to the cylinder bore). For the high-resolution pulse, TDC accuracy has to be 1% or better to be a better system than the Opti-Spark.
In addition, especially for sequential fire injection, camshaft position sensing for the low-resolution pulse is a requirement.
And, the setup of this replacement system has to be able to be accomplished by the average shade-tree mechanic to be profitable.
My vision of this is two sensors, one on the camshaft for the low-res pulse and one on the crankshaft for the high-res pulse. With the high-res pulse originating from the crankshaft, timing chain stretch will not affect the high-res pulse and it will be more accurate.
Plus, it has to be more reliable than the optical side of the Opti-Spark to be of any value -- in reality, the optical side of the Opti-Spark has a much better track record than the high-voltage side.
It's doable, but don't hold your breath on this one.
In my opinion, it would be better to redesign the ECM or use an ECM that does not depend on the Opti-Spark style optical signals and do things like the LS1.
Could an LS1 or LT5 ECM somehow be used with different camshaft and crankshaft sensors???????.
Tom Piper
