Ok i just got the engine put in after a couple years and went for the maiden voyage around the block, it was running great untill the tstat opened and apparently i didnt hook a hose up correctly on the throttle body and it blew coolant all over the opti, it started to get warm but i made it home b4 it hit red. now it wants to miss and backfire. is the opti fried? is there a chance i could take it apart dry it out and put it back together since they are pricey? is there something else due to maybe getting it too hot?

my mods are, midtubes, cam, cai, roller rockers.

*im in the process of doing the throttle body bypass now props to shbox.com

 

Are you driving around with open headers and your O2 sensors connected? It'll run like crap as soon as it's warmed up and starts using them. The outside air throws them off.

 

i was running open headers with the o2's connected, i just got some exhaust on it and ive ran it very little since i got the exhaust on. maybe ill drive it around some to so if it heals

 

Make sure all the wiring connections are clean and dry. Coolant doesn't evaporate very fast. Pull the plug wires and the coil wire out of the Opti and make sure they are not wet and corroded. Check all the wires related to the ignition - coil and ICM included. Check the Opti harness connector for corrosion and dampness. Dry everything off with clean rags, and blow out the connections with compressed air.

 

It sounds like an opti issue. Open headers won't make it run too horribly--not like when there's an ignition problem.

Hope the opti is OK.

If you're gonna have to dish out cash for a new opti--get a used one instead, yank out the rotor and throw it in the trash, and then do the LTCC ignition (you'll never need the opti rotor again). Then you don't have to worry about your opti crapping out on you (probably for the life of the car).

If you get the 4 coils (the kind that have two terminals on each one) and ignition module from a Northstar Caddy for $40 or so from the junkyard then get the bare bones LTCC kit from here, http://www.delteq.com/products.htm, you will spend about the same or less as you would on a Dynaspark opti upgrade (which, to me, is the only worthwhile "optispark only" upgrade-much better design than other opti-sparks). The LTCC will outperform ANY "opti-spark only" setup and for a longer period of time, too.

I would mount the coils to the valve cover on your engine and get "cut to fit" plug wires and run them accordingly. The Caddy style coil setup is cheaper (and easier to mount) than buying 8 LS1 coils, for sure, unless you find a smoking deal on them somewhere.

In my opinion, this is the most worthwhile mod on an LT1 engine.

It doesn't matter how much the heads flow when the spark isn't there to light the fire--he he he.

Just my 2 cents.

 

You are mixing up two different systems. The LTCC does not use 4 dual-tower coils from a Caddy Northstar. That's the Delteq system, and Delteq has been out of business for several years. The Bailey Engineeering LTCC uses 8 LS1-style coils, and has 8 driven ignition channels, not a 4-channel, waste spark system like the Delteq.

http://www.bailey-eng.com/LTCC.html

Hopefully in the many months since he posted this, he's figured it out.

 

If you use the harness kit and "brain box" from any LTCC mod kit, can't you use the 4 coil setup?

Does it HAVE to be 8 separate coils?

Now I am curious.

 

No. The 4-coil setup uses a single coil to fire two cylinders simultaneously - one on the compression stroke (cylinder fires) and one on the exhaust stroke (nothing to fire - spark is "wasted"). There are only 4 driven channels on a 4-coil system. Its done that way because the engine only has a crank position sensor, and the PCM can't tell where any given cylinder is in the 4-stroke cycle. You need a cam position signal to generate an 8-channel system. The Opti provides the detailed cam position, which allows the 8-channel system to function.

If you had an LTCC 8-channel box, you would have to hook two channels to the input connection for each dual-tower coil. You would have to ask Bob Bailey is his "box" would even function wired that way.

I'm running 8 LS1 coils, using a differnt setup.

http://www.injuneer.com/images/photo...ne/Coils01.jpg

 

That's cool how you mounted the coils. I'll have to figure out how to mount them. I'll figure something out.

Thanks for the input and for the pic.