Hardcore Sledder banner
1 - 6 of 6 Posts
Joined
·
1 Posts
Discussion Starter · #1 ·
Hi. Greetings from Norway?,? I hope someone can explain these numbers for me. Cannot find the last 4 digits anywhere on neither of them. What model and are both of them belonging to Thundercat? Can someone tell me where to find the correct information?
Tnx
 

Attachments

·
Registered
Joined
·
997 Posts
I don't know how accurate this is, but I was told long ago those number are a code for the shift and maker that built the box. It's the top numbers that matter. I think that was for a 2000 thundercat triple.
 

·
Registered
Joined
·
997 Posts
Just went out into the shop and took a pic of this. Its off my 2000 T-cat.
 

Attachments

·
Registered
Joined
·
997 Posts
Now you got me thinking. Maybe I replaced an 01 box with another 01??? The guy I bought this box from said it was an 01 and he checked the VIN. # on the tunnel as well. If anyone can shed some light on this I would appreciate it too. This is a post I copied from another page on here:


No mysteries. The 1998-1999 usues the CU2545. It is an open loop CDI. The 1993 was a one year wonder and is a closed loop CDI box. The 2001 is an open loop 3d ignition that uses the TPS (Throttle position switch) to choose it's 3d map for the ignition timing. Each CDI works well. Each one pretty much has the same top end timing advance. The 2000-2002 ignitions are totally different and you can't mix and match parts from a 1993-1999 ignition with a 2000-2002 ignition. The CDI box, stator, flywheel, flywheel mounting plate are different. The only things that are the same are the trigger and the coils. Depending on the mods you have done to your sled determines which cdi may work best for your application. Some guys add timing keys ect...but depending on your porting, pipes and head combo your sled may want or may not want more timing. I've seen some very interesting results on the dyno verifying everything I wrote above. If you have a stock 1999 sled, just use the 1999 cdi on it. You won't have any issues with it. The only "bad" thing I've seen on the 1998-1999 CU2545 cdi box is that they are more apt to lose the grounding circuit in them. That means that when you turn the key off or hit the kill switch, the sled doesn't shut off. The "updated" 1998-1999 ZRT box# was the CU2542 and most guys didn't like that box. The 2000 CDI was a dud...9 degrees timing on the top end. That was box# CU7211. The 01' was the "best" CDI box for the 3d ignitions produced between 2000-2002. The 2001 Pt. # on the box is CU7208. The 2002 CDI box was somewhere in the middle of the 2000-2002 box as far as the timing advance.
 

·
Registered
Joined
·
4,376 Posts
The 1998-1999 usues the CU2545. It is an open loop CDI. The 1993 was a one year wonder and is a closed loop CDI box. The 2001 is an open loop 3d ignition that uses the TPS (Throttle position switch) to choose it's 3d map for the ignition timing. Each CDI works well. Each one pretty much has the same top end timing advance. The 2000-2002 ignitions are totally different and you can't mix and match parts from a 1993-1999 ignition with a 2000-2002 ignition. The CDI box, stator, flywheel, flywheel mounting plate are different. The only things that are the same are the trigger and the coils. Depending on the mods you have done to your sled determines which cdi may work best for your application. Some guys add timing keys ect...but depending on your porting, pipes and head combo your sled may want or may not want more timing. I've seen some very interesting results on the dyno verifying everything I wrote above. If you have a stock 1999 sled, just use the 1999 cdi on it. You won't have any issues with it. The only "bad" thing I've seen on the 1998-1999 CU2545 cdi box is that they are more apt to lose the grounding circuit in them. That means that when you turn the key off or hit the kill switch, the sled doesn't shut off. The "updated" 1998-1999 ZRT box# was the CU2542 and most guys didn't like that box. The 2000 CDI was a dud...9 degrees timing on the top end. That was box# CU7211. The 01' was the "best" CDI box for the 3d ignitions produced between 2000-2002. The 2001 Pt. # on the box is CU7208. The 2002 CDI box was somewhere in the middle of the 2000-2002 box as far as the timing advance.

Looks like something I'd say.
 
1 - 6 of 6 Posts
Top