I typically run and tune 17-19 degrees of timing from full-boost out to redline on externally gated setup while you can get away with more timing on internally gated setup due to boost tapering up top. I would recommend 50/50 for summer months and 75/25 or 80/20 meth/h20 mixture for the winter. If temps get in the 20-30 degrees, I switch to 100% meth.

I home built my kit and have been using it ~4 years now.

 

What boost, and rpm point are you at while putting 17-18 deg. of timing into the motor??

 

are you saying you're running 17-19 degrees at max. torque (close to when full boost first hits) all the way to redline?

 

My FP3065 hits 25lbs at ~4600RPM, so from that point on it's getting 18.2 degrees til redline. This is pump with meth/h2o. My boost only fluctuate +-1lbs on my external setup. Now at 30lbs on 110 and meth/h20, timing is 2-3 degrees more agressive.

On internally gated setup turbo, at peak torque (boost) I typically do not give it too much timing but as boost starts to taper in the higher RPM's, more timing to compensate loss in boost (load, air flow, etc).

Every Evo, Suby, and DSM that I've tuned all behaved differently. You're car will let you know if it's it happy or not.

 

If you're able to feed the motor 18 degrees of timing at peak torque on pump gas with meth injection then I'm an elephant.

Did you set up your AEM properly with a timing light to dial in the RPM advance?

And you also realize that your timing should increase as your RPMs increase right?

Also, what do you mean you give the motor more timing in order to copmensate for a loss in boost? When you boost goes down, your timing map should already be more advanced. Because you run more advanced timing at lower load levels.

I'd like to take a look at your map or a log or something.