I am going to add a system to my modded FD in the next few weeks. My mix will be 50/50 and I will have it split between pre-turbo and post IC. Prior to any dyno or change in tuning, where should my timing be? I am currently using a slightly altered timing from the PFC base map for my mild street port with a 12 split and 15 safety split on the last row. Should I alter the split any or increase any IGL in the higher boosts? Also, I have read numerous posts on all of our sites and the manufactures sites for making sure I have a fully tuned base fuel map on gasoline prior to the added methanol injection. It looks to me I should expect a decrease in AFR from the methanol of anywhere from .4 to .8 from what I have read depending on how much methanol replaces gasoline. Is this correct?

Lastly, I am going to split the volume with 3 nozzles. I will have the main nozzle post IC and have a pre-turbo on the primary, with both of these coming on at 5 psi. Does anyone have experience with what ot do with the pre-turbo for the secondary turbo since it only requires very little flow for pre-spool rpms? My thoughts are these, all of which will use a solenoid to come on after the others start at 5 psi: #1-have the secondary come on at 12 psi off a pressure switch #2-have it come on at 10 psi and be tied in series with the turbo control solenoid ground signal (both pressure has to be there and the Power FC is signaling for the secondary turbo #3- use a vacuum switch in the air intake for the secondary turbo (if the turbo is spooling quick enough to cause a least some vacuum, it will call for water injection and the switch will trip the solenoid and will only get pressure if the system has already benn tripped by 5 psi on the main system)
What does everyone think? Does anyone have experience with this more complicated twin sequential setup?
Thanks for any responses.
Mike
P.S. I plan on trying to get the '99 specs to at least 19 psi or more if I can. It will hopefully make it with the improved turbo map function and a lower temp charge at the turbos from the WAI, my low psi drop IC, and my little back pressure with a downpipe, metal cat and free flowing post-cat.

 

One thing I forgot. I plan on each of the pre-turbo having 2gpm nozzles and the post IC getting 4gpm with the total amount being injected around 550 cc/min at WOT for what should be about approximately 400-425 rwhp.

 

I use a single kn filter with dual flanges (K&N RU-4710) and have a single nozzle on the top of the filter, that way it doesn't matter which turbo is working when. I also have a second nozzle on the greddy elbow.