need more top end

[**sj**]

Some of the PC maps are around 4 through the midrange and up to 9 degrees at 11,000.

yep....not not across the entire powerband

 

[ROCKRTX]

Don't install the sheave.

Advance the ignition timing 4-5 degrees. Then run it at around 10,900. You probably will be close to 10,900 without doing any clutching. They run strong on top like this.

How much timing you could run on top with out go too far and loose hp?

 

[Charged RTX]

I will have mine running next weekend at 5 degrees. I think it is going to run well. I thought I was running 5 degrees last year but I did not check it with a wheel. So last year at 3 degrees advance and a split head gasket I ran 87 octane with no problems even on a long WFO run. No detonation and good power. This year I will stick with 93. I think 5 degrees is a compromise for a fixed advance. We will see. I will update next week.

 

[Charged RTX]

Rock, You can run around 9 degrees up past 11,000 but you need to use the ignition module for that because you can not run it that advanced in the lower rpm range. Unlike the rx1 the Apex ECU retards the timing on top for some reason.

 

[SledFreak]

I don't think you could run more than 6 degrees up top, even with good fuel for a long Wide open Run without detonating. Maybe 7-8, but I would not push it anymore than that..

 

[Charged RTX]

Dyno Ray the person that probably has more dyno time than anyone on the RX-1 and Apex motor sets all of them up that way. I do not know the exact advance at each rpm but he finishes them at 9 degrees past 11,000. Just give him a call. You guys with the Ulmer Ignition controller. What rpm is he having you run at on top. I have heard that the Ulmer ignition module is not set up as aggresive as Rays. Do you guy's know how much advance he dialed in around 11,000? Allen?