Rule of thumb is 2 degrees back for every 50hp. Don't forget to close up your plug gap to about .035, and check your plugs after your first full pass to make sure there is no detonation.
__________________
Single Cam Hatch
VTEC - All the lag of a turbo............None of the boost
If its Fast and reliable, it ain't cheap.
If its Cheap and reliable, it ain't fast.
If its Fast and cheap, it ain't reliable.
Hey guys how much timing should a 5.0 be at with 100 shot wet?
Engines react differently when it comes to ignition timing with nitrous. Some engines want 10* initial timing with a 125 shot, while some engines won't like anything more than 6-8* with even a 50 shot. The best way to start tuning is to start with a 50shot and running stock timing. From there its best to start pulling timing, say 1.5* for every 50hp above the 50shot. For example, with a 150 shot, you'd remove 3* of timing. If your car doesn't have a distributor, a timing adjuster can usually be added to adjust timing. If not, be careful as you proceed going to the higher jets, making sure there is NO detonation. Detonation kills head gaskets and pistons or rods faster than anything.
Another item that will need to be addressed with nitrous is spark plugs. Always use copper spark plugs with nitrous. Also, use 1 step colder plugs for up to a 125 shot, and 2 steps colder for 150 and over.
When running a nitrous wet shot, learn to read your spark plugs. Check the plugs after several runs on the nitrous, and also check them every time you step the jets up (do some reading on this, it's important)
Never take the manufacturer's suggestions as being carved in stone. If they say 8-12* of initial timing is safe with their kit, start at the small side, and work up. Remember, its easier to play it safe and sneak up on your tune than it is to start on the edge and mess something up, only to have to start over.
Engines react differently when it comes to ignition timing with nitrous. Some engines want 10* initial timing with a 125 shot, while some engines won't like anything more than 6-8* with even a 50 shot. The best way to start tuning is to start with a 50shot and running stock timing. From there its best to start pulling timing, say 1.5* for every 50hp above the 50shot. For example, with a 150 shot, you'd remove 3* of timing. If your car doesn't have a distributor, a timing adjuster can usually be added to adjust timing. If not, be careful as you proceed going to the higher jets, making sure there is NO detonation. Detonation kills head gaskets and pistons or rods faster than anything.
Another item that will need to be addressed with nitrous is spark plugs. Always use copper spark plugs with nitrous. Also, use 1 step colder plugs for up to a 125 shot, and 2 steps colder for 150 and over.
When running a nitrous wet shot, learn to read your spark plugs. Check the plugs after several runs on the nitrous, and also check them every time you step the jets up (do some reading on this, it's important)
Never take the manufacturer's suggestions as being carved in stone. If they say 8-12* of initial timing is safe with their kit, start at the small side, and work up. Remember, its easier to play it safe and sneak up on your tune than it is to start on the edge and mess something up, only to have to start over.
Forgot to mention the colder plugs, good call.
__________________
Single Cam Hatch
VTEC - All the lag of a turbo............None of the boost
If its Fast and reliable, it ain't cheap.
If its Cheap and reliable, it ain't fast.
If its Fast and cheap, it ain't reliable.
timing for 100 shot 
