I would also think about replacing the water pump and the serpentine belt while I was in there. 
OPTI Options
Thread Starter
Advanced
Joined: Jun 2009
Posts: 76
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From: Lake Junaluska North Carolina
OPTI Options
I should know this... Right?... but I do not know the answer.... offcially or otherwise.
What is the best Opti in terms of lasting performance for a 1994 (pre-vented) Opti.
What is the best Opti in terms of lasting performance for a 1994 (pre-vented) Opti.
Drifting
Joined: Aug 2004
Posts: 1,327
Likes: 5
From: 2010 C6 Grand Sport Convertible
That's been the age old deliberation here on the forum. As Dynaspark held the nod for overall approval but is now defunct, I'd have to say go with the OEM replacement. Hopefully others will chime in that have had other experiences.
Mike
Mike
Safety Car
Joined: Feb 2000
Posts: 4,564
Likes: 110
From: Austin Texas
I've never owned an LT1/LT4 car, but have seen more than my share of racers having issues with those things. The only person who didn't...replaced it with a crank trigger and a new ECM.
Le Mans Master
Joined: Mar 2001
Posts: 7,999
Likes: 14
From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
Cruise-In III Veteran
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St. Jude Donor '12
Jury is still out, but here are your choices:
AC/Delco OEM
MSD
Dynaspark (hit and miss these days)
Summit/Jegs, etc White Box (I have a summit on my 383 right now)
Chandler Motorsports
Do a ton of research before you buy.
I installed the Summit White box because: I needed it within a couple days and Their warehouse is 45 min away and Chandler only had an eBay/PayPal option at the time I needed it. So far its been fine, but only have about 100 road course miles on it.
AC/Delco OEM
MSD
Dynaspark (hit and miss these days)
Summit/Jegs, etc White Box (I have a summit on my 383 right now)
Chandler Motorsports
Do a ton of research before you buy.
I installed the Summit White box because: I needed it within a couple days and Their warehouse is 45 min away and Chandler only had an eBay/PayPal option at the time I needed it. So far its been fine, but only have about 100 road course miles on it.
Roadster Madness. 😠
Joined: Sep 2009
Posts: 6,291
Likes: 2,361
From: Ventura Co Ca
SoCal Regional Events Coordinator
St. Jude Donor '13, '20-'21
Drifting
Joined: Aug 2009
Posts: 1,615
Likes: 3
From: Tampa Fl
Jury is still out, but here are your choices:
AC/Delco OEM
MSD
Dynaspark (hit and miss these days)
Summit/Jegs, etc White Box (I have a summit on my 383 right now)
Chandler Motorsports
Do a ton of research before you buy.
I installed the Summit White box because: I needed it within a couple days and Their warehouse is 45 min away and Chandler only had an eBay/PayPal option at the time I needed it. So far its been fine, but only have about 100 road course miles on it.
AC/Delco OEM
MSD
Dynaspark (hit and miss these days)
Summit/Jegs, etc White Box (I have a summit on my 383 right now)
Chandler Motorsports
Do a ton of research before you buy.
I installed the Summit White box because: I needed it within a couple days and Their warehouse is 45 min away and Chandler only had an eBay/PayPal option at the time I needed it. So far its been fine, but only have about 100 road course miles on it.
The ones you listed are probley the best ones.
Do the plug wires also they are a PAIN,drivers side anyways.
Last edited by tblt44; Mar 22, 2011 at 09:00 PM.
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Former Vendor
Joined: Oct 2006
Posts: 134
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From: Waukesha Wisconsin
Glad to see taking care of our customers and offering a great product paying off. Thanks for the plug 
People are always welcome to call me, though I'm usually only answering phones after 12 or so. During the morning we're getting all the shipments ready for the day and responding to eBay messages\emails.
Still working the factory to get Mitsubishi sensors. Some day!
People are always welcome to call me, though I'm usually only answering phones after 12 or so. During the morning we're getting all the shipments ready for the day and responding to eBay messages\emails.
Still working the factory to get Mitsubishi sensors. Some day!
Instructor
Joined: May 2009
Posts: 159
Likes: 1
From: tamarac fl
opti issues msd need advice badly.
Hey all,
I recently changed my gm origunal opti after 95k miles. i put an msd non vented with a new msd coil, and wiresw also msd 8.5
my mechanic friend left the 2 compression openings open, i have read on here to block them, to install the way msd says thru intake ...
now im going crazy because my car is getting 6 mpg, back firing ONLY under load in first gear. have tried tuning it with screw but not always works. My computer will not link up to any obd2. but the computer is working i guess .
the car has been well maintained since i bought it. put in around 7k. but before i go and get ripped off by a vette specialist who refuses to listen to all my diagnostics and problem solving steps in hopes he wont have to repeat it all i am begging and will pay for someone who understands and can set the following issues right
I recently changed my gm origunal opti after 95k miles. i put an msd non vented with a new msd coil, and wiresw also msd 8.5
my mechanic friend left the 2 compression openings open, i have read on here to block them, to install the way msd says thru intake ...
now im going crazy because my car is getting 6 mpg, back firing ONLY under load in first gear. have tried tuning it with screw but not always works. My computer will not link up to any obd2. but the computer is working i guess .
the car has been well maintained since i bought it. put in around 7k. but before i go and get ripped off by a vette specialist who refuses to listen to all my diagnostics and problem solving steps in hopes he wont have to repeat it all i am begging and will pay for someone who understands and can set the following issues right
Le Mans Master
Joined: Mar 2001
Posts: 7,999
Likes: 14
From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
Cruise-In III Veteran
Cruise-In IV Veteran
St. Jude Donor '12
Describe what you mean by compression fitting.
Post in the florida section - just simply looking for a good vette mechanic in your area.
Good Luck
Drifting
Joined: Nov 1999
Posts: 1,502
Likes: 12
From: Yorktown Heights NY
OEM is no longer OEM!
IMO for the Best Opti in town go to ChandlerMotorsports.com
Replaced mine back in January......get the lifetime warranty unit.
Well made, you won't be disappointed
IMO for the Best Opti in town go to ChandlerMotorsports.com
Replaced mine back in January......get the lifetime warranty unit.
Well made, you won't be disappointed
Drifting
Joined: Dec 2004
Posts: 1,313
Likes: 5
From: Middle Tennessee
95BLKVette, I just checked Chandler Motorsports website and their compatibility listing for the Optispark doesn't list the 94 Corvette. Does the 94 use a different one than the 95-96?
Note: This is my stupid question for today!
Note: This is my stupid question for today!
Drifting
Joined: Oct 2004
Posts: 1,477
Likes: 80
From: Hawaii
http://shbox.com/1/93-94_opti.jpg
http://shbox.com/1/opti_back.jpg
Last edited by James93LT1; Mar 28, 2011 at 08:39 PM.
Le Mans Master
Joined: Mar 2001
Posts: 7,999
Likes: 14
From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
Cruise-In III Veteran
Cruise-In IV Veteran
St. Jude Donor '12
Physically incompatible.
You can "fix" the electrical differences, the real early ones have a different connector at the intake side.
You can "fix" the electrical differences, the real early ones have a different connector at the intake side.
Pro
Joined: Mar 2005
Posts: 666
Likes: 0
From: Walton KY
I replaced mine with an MSD unit. The first MSD I had went bad quick and stopped firing to 5 of the cylinders, loading them up with fuel, then backfiring shooting flaming ***** of converter flying down the road. No kidding! MSD replaced it with upgraded pieces and I have not had a problem since. I went with the vented option which was no big deal to put in.
