LT4 distributor install photos
Thread Starter
Pro
Joined: Dec 2002
Posts: 704
Likes: 16
From: Dallas Texas
LT4 distributor install photos
Optispark and LTCC (most recent ignition) were giving me problems so decided to go Dual Sync distributor on my LT4. Should give me full sequential fueling through my gen-VII too.
Thread Starter
Pro
Joined: Dec 2002
Posts: 704
Likes: 16
From: Dallas Texas
Thread Starter
Pro
Joined: Dec 2002
Posts: 704
Likes: 16
From: Dallas Texas
The hardest part was making the tapered shim to account for the angle the distributor sets at when in place.
Le Mans Master
Joined: May 2004
Posts: 5,385
Likes: 534
Thanks for letting me know. Also, how did you make sure you were in the right spot for making the hole? A spare L-98 manifold as a template? Reason I ask is I have a lt1 manifold I'm trying to convert to fit the gen1 smallblock.
Thread Starter
Pro
Joined: Dec 2002
Posts: 704
Likes: 16
From: Dallas Texas
I tried repeatedly to contact the guy at www.lt1intake.com to get him to do the conversion for me but he isn't returning emails. Went through his site and he spells out how to do both distrib and L98 conversions. Purchased intake from local parts store and made template and returned to store next day. I was off by 1/16th to 1/8th inche on first try but made hole a little bigger and it works fine. Spacer will be welded in and will cover the slight play.
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Melting Slicks
Joined: Jan 2002
Posts: 3,293
Likes: 79
From: Jackson MI
Brand-X,
Welcome to the club! Both LCVette and I are running these on our turbo vettes. I've had much less issues with these than the opti sparks.
Did you also switch to a keyed crank hub? It will help when checking/setting timing. You'll also need to mark TDC on the crank pulley.
Welcome to the club! Both LCVette and I are running these on our turbo vettes. I've had much less issues with these than the opti sparks.
Did you also switch to a keyed crank hub? It will help when checking/setting timing. You'll also need to mark TDC on the crank pulley.
Team Owner
Joined: Mar 2001
Posts: 30,847
Likes: 293
From: Boston, Dallas, Detroit, SoCal, back to Boston MA
Do you have the part # for that distributor?
a friend of mine might be modifying an LT1 intake for an L98.
If he's doing one, he can modify another.
EDIT:
Is this the one?
http://www.accel-dfi.com/ProductDeta...minselection=0
a friend of mine might be modifying an LT1 intake for an L98.
If he's doing one, he can modify another.
EDIT:
Is this the one?
http://www.accel-dfi.com/ProductDeta...minselection=0
Last edited by BrianCunningham; May 6, 2008 at 12:51 PM.
Thread Starter
Pro
Joined: Dec 2002
Posts: 704
Likes: 16
From: Dallas Texas
Brand-X,
Welcome to the club! Both LCVette and I are running these on our turbo vettes. I've had much less issues with these than the opti sparks.
Did you also switch to a keyed crank hub? It will help when checking/setting timing. You'll also need to mark TDC on the crank pulley.
Welcome to the club! Both LCVette and I are running these on our turbo vettes. I've had much less issues with these than the opti sparks.
Did you also switch to a keyed crank hub? It will help when checking/setting timing. You'll also need to mark TDC on the crank pulley.
CT
Thread Starter
Pro
Joined: Dec 2002
Posts: 704
Likes: 16
From: Dallas Texas
Do you have the part # for that distributor?
a friend of mine might be modifying an LT1 intake for an L98.
If he's doing one, he can modify another.
EDIT:
Is this the one?
http://www.accel-dfi.com/ProductDeta...minselection=0
a friend of mine might be modifying an LT1 intake for an L98.
If he's doing one, he can modify another.
EDIT:
Is this the one?
http://www.accel-dfi.com/ProductDeta...minselection=0
Melting Slicks
Joined: Jan 2002
Posts: 3,293
Likes: 79
From: Jackson MI
Safety Car
Joined: Jul 2001
Posts: 4,871
Likes: 15
From: Detroit's West Side MI
OK, so what's required for this conversion on an LT1 car?
I'm sick of the Optispark as well.
Modify intake
Spacer for distributer
Accel distributer for '87+ car
Keyed hub
I already have an ATI damper pulley, the intake, and an old distributer. I'm still not understanding where you're getting the timing signal for the ECM. What drives that distributer? Does the LT1 have the provisions to turn the rotor?
I'm sick of the Optispark as well.
Modify intake
Spacer for distributer
Accel distributer for '87+ car
Keyed hub
I already have an ATI damper pulley, the intake, and an old distributer. I'm still not understanding where you're getting the timing signal for the ECM. What drives that distributer? Does the LT1 have the provisions to turn the rotor?
Thread Starter
Pro
Joined: Dec 2002
Posts: 704
Likes: 16
From: Dallas Texas
OK, so what's required for this conversion on an LT1 car?
I'm sick of the Optispark as well.
Modify intake
Spacer for distributer
Accel distributer for '87+ car
Keyed hub
I already have an ATI damper pulley, the intake, and an old distributer. I'm still not understanding where you're getting the timing signal for the ECM. What drives that distributer? Does the LT1 have the provisions to turn the rotor?
I'm sick of the Optispark as well.
Modify intake
Spacer for distributer
Accel distributer for '87+ car
Keyed hub
I already have an ATI damper pulley, the intake, and an old distributer. I'm still not understanding where you're getting the timing signal for the ECM. What drives that distributer? Does the LT1 have the provisions to turn the rotor?
Safety Car
Joined: Jul 2001
Posts: 4,871
Likes: 15
From: Detroit's West Side MI
For me it was a keyed crank pulley, aftermarket ECU, accell dual sync distrib, and a little machine work on the intake manifold. Yes, there is a provision for a distrib in the block (usual location). Not sure what is required to run distrib and stock ecu...pretty sure it can be done but I haven't researched it.
Is the camshaft different for an LT1 also, or does it have the splines to drive the distributer?
Thanks!
Instructor
Joined: Nov 2007
Posts: 105
Likes: 0
From: Davisburg Michigan
ScaryFast,
You can just use the opti for the electronics and run a cap and rotor in the distributor. The only catch is to align the rotor with the correct spark plug terminal at the right time.
Ron
You can just use the opti for the electronics and run a cap and rotor in the distributor. The only catch is to align the rotor with the correct spark plug terminal at the right time.
Ron
Thread Starter
Pro
Joined: Dec 2002
Posts: 704
Likes: 16
From: Dallas Texas
The LT1 cams are different on the front end to allow for optispark connection. The back end (oil pump end) is the same (gears, etc.). I went with the Accell Gen VII w/wideband O2. I tried running just the electronics in the optispark when I went to an LTCC but I still had opti issues...I guess those things that like to be spuns that fast!
Team Owner
Joined: Mar 2001
Posts: 30,847
Likes: 293
From: Boston, Dallas, Detroit, SoCal, back to Boston MA
So it's NOT putting out the right signal.
If your going to keep the opti signals, you can run which ever distributor you want.
EDIT
You also either need a long coil lead, or some way of relocating the coil and it's module.
If your going to keep the opti signals, you can run which ever distributor you want.
EDIT
You also either need a long coil lead, or some way of relocating the coil and it's module.
Last edited by BrianCunningham; May 7, 2008 at 04:02 PM.
Instructor
Joined: Nov 2007
Posts: 105
Likes: 0
From: Davisburg Michigan
Brand X,
What type of opti issues did you have? Was it something you saw in a data log or not enough power from the ltcc coils?
I am running a Caroll 8 rib on a T trim and curious what I should look for?
Thanks
Ron
What type of opti issues did you have? Was it something you saw in a data log or not enough power from the ltcc coils?
I am running a Caroll 8 rib on a T trim and curious what I should look for?
Thanks
Ron