Timing ?

D

Danger Dog

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May 14, 2003
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What is the timing curve of a 97 sx 700 cdi? Between 9400 and 10000. I know this may seem like this question is in the wrong forum but I am running a complete sx ignition in my srx 1000.
 
Nope, and the other CDI's all lose timing with higher rpm intervals.

The SRX race CDI's hold 11 degrees after 8250 rpm.

By the way, I made a mistake. It's 18 degrees after 7000 rpm, not 7500.....not that it will make a difference for you. Just use a 4 degree offset keyway to get your 14 degrees. That is what I have to do with my prostocker.
 
Whats the timing of a 01+ sx cdi? Since they are a different box. I am running an 01 sx cdi with 5 additional degrees.
 
I am not sure. I thought the timing was the same, but I doubt you'd be running 22 degrees of timing and staying alive.
 
I have ran it that way for 4 years, in my 780 viper and price 1000. They both love it for 660' drags. On the dyno (780 viper) I left the timing key in it and made most power with 01 sx cdi vs. stock viper vs. simons race cdi. They are staying alive.
 
I'm running a srx based 780 with the 600 cdi. Engine builder told me that the 780 liked the extra timing and as long as I made sure to run good fuel I'd have no problems. Two years later and all is well:)
 
Thanks for the replies. I am currently spinning it at 9400 and it was fine this past winter. Although I did have troubles in years past but it was related to fuel. If all goes well I am going to try a different set of pipes and more compression and it will probably make power at 10000.
 
valin said:
Nope, and the other CDI's all lose timing with higher rpm intervals.

The SRX race CDI's hold 11 degrees after 8250 rpm.

By the way, I made a mistake. It's 18 degrees after 7000 rpm, not 7500.....not that it will make a difference for you. Just use a 4 degree offset keyway to get your 14 degrees. That is what I have to do with my prostocker.
Click to expand...

Do you use the keyway clockwise or counteclockwise to retard timing.
 
Danger Dog said:
Do you use the keyway clockwise or counteclockwise to retard timing.
Click to expand...

To retard the timing, you install the keyway so that the top of the flywheel is rotated towards to back of the sled, which is counterclockwise.


cumminsdsl said:
what about the power valves while running a sx cdi???
Click to expand...

The SX CDI does not have valve operation built into it. Powervalves will not work with an SX CDI. Mind you, there are ways around this. My motor has price cylinders, so there are no powervalves.
 
Just a side note for you guys. Using a keyway to advance the timing results in advanced ignition timing throughout the ENTIRE timing curve. For trail applications, this is not a wise thing to do, and will usually result in detonation because there will be more heat built and held in the cylinders, instead of in the exhaust pipes.
 
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