Can someone help me by giving me a basic idea of safe Timing values for a rotary i know you want to keep the AFRs around 11:1 but would going up to about 11.8:1 be to lean?

Where are you located?

11:8:1 is a little on the lean side, 11:5:1 is about as high as I would want to take it. 12:1 would be considered dangerous, 11:1 safe, 10:1 a little rich. Timing starting at 0 psi could be around 30-35 degrees then taper down to 15 degrees by 15psi. My timing is set at 36degrees before 0 psi, then 31 degrees at 0psi, then tapers down to 14degrees just after the 15psi mark and holds steady 14degrees the rest of the map. I tuned the car for 11:1 on the dyno last time I went and with these timing values its stayed together running 18psi for a couple years now, so in my mind its pretty safe.

I live in baltimore MD thanks for the info 94 touring if i have any more tuning questions do you mind if i PM you? or do you have aim?

If you were close to me, I'd offer to tune it at our shop.

Are you referring to gotham Racing? one day i might take a road trip down there how much do you guys charge?

Can you offer any hits /tips on tuning? BTW I really wanted to learn how to tune just to know ya know? its one of those things i relaly want to know how to do

Shoot me a PM anytime you feel, or i'm on aim all the time as touring94.

Yes, Gotham Racing. We charge $350 for tuning. If we do a motor rebuild it includes free tuning.

have you guys played with the timing split much?



mike

I haven't messed with timing split a whole lot. I know the closer together the more power, but on the haltech I have heard there is a chance if they are too close together the trailing can fire before the leading, causing a blown motor. There are some ecu's like autronic if i'm not mistaken that have them firing at the same time, and there is no chance for error. The difference in power between firing at the same time and slightly apart is still a mystery to me, never seen any real numbers.

thats kinda the reason i bring this up, i have no choice but to run with 0 split and it seems like it wants a lot less total advance than you guys are running



mike

How much advance are you running Mike?

its like 24 degrees in vacuum and like 10-12 at about 10psi. i have no timing split though



mike

Wow that is low, considering I run 14 degrees after 15psi. Does the car start to break up or something? What kind of igntion system do you have?

i've got 3 fd leading coils, i'm thinking maybe its not good enough under load. its happy in vacuum though



mike

Hook up an ignition amp like the hks twin power, that might solve the problem.

ask boostn7 he has played with the timing split alot

When your running no split you will notice timing doesn't like to be to far advanced. I would run about 2~5 degrees at 10 psi boost. Maybe even less depending on your fuel. DON'T RUN 15 degrees timing with no split!!!

yeah, its running like 6-8



mike

sometimes i wish i knew about haltech. but i dont so sorry, i am just passsing through

well if we're just talking timing numbers or injector % it doesnt matter what ems it is



mike

That's a pretty badass little avatar you've got there, apex https://www.nopistons.com/forums/pub...1047683329.gif

it chases wendell around



mike

Re: Rotary Tuning
 

would this be okay for a FC3S na/t i have a microtech LT-8 stock 550 injectors from my blown turbo block turbo lower and upper manifold i have the racing beat REVII turbo back exhaust and basic suspension set up.