Hey guys, wrapping up my 6-port turbo build, it's fairly simple. I'm pretty inclined technically and have been doing research for months to get a good grasp of tuning for the most part. One thing that I'm mainly concerned about is my ignition timing map which leaves a lot of room for concern. I've been turned down by 3 tuners within a 200-mile radius up here in the Northeast because they see my project as high risk or just flat dumb (that's an argument for another day). Curious to see if anybody can share their MSQ file(s) with a similar setup so I can get this car dialed in safely. I'm not shooting for crazy power, I'm more concerned about safety and consistency.

Megasquirt 3 EVO
ID1050x Injectors (x4)
Stock Ignition Coils
S4 LIM/UIM
S4 Turbo w/ ported wastegate
Ebay FMIC
Stock Port-Engine
GM IAT/CLT
AEM Wideband
Electronic Boost Controller from AMP EFI
Racing Beat Downpipe

Thanks!

 

im just gonna ask why waste spark, and i dont see why a high risk or dumb project.

 

IRP down in New Jersey immediately turned me down, they pretty much said something along the lines of "We only tune Tii's on Haltech's" which is BS in itself and a sign of laziness knowing Tii guys run high compression rotors all the time. What do you mean by "why waste spark"? a little confused by that, I just know the way NAs are setup from the factory, the spark advance is way too aggressive and can lead to pinging.

 

let me refrase that stock coils.

 

They're functional and sufficient enough for what I'm doing, I see no purpose in upgrading to smart ignition coils right now. It really won't hurt anything.

 

Been dialing in this map, here is currently where spark and AFR table sit, any opinions and suggestions would be helpful.

 

should work

 

Made a few updates to the ignition map, still need to dial in the split table right now.

 

I'm running very similar timing and AFRs on my streetported 6-port S4 and an S360 turbo and tubular intake and water to air intercooler. 93 octane pump gas. Unless you are seeing high air temps or running a tiny turbo making a bunch of heat you should be just fine.

 

Awesome, def when I take it for a drive I'm going to keep tabs on the IATs to ensure that the engine isn't getting heat-soaked.

 

Im curious how that spark advance table is working out for you. My Tii(ported tii with 9:1 rotor) does NOT like anything more than around 7-8* of leading advance at idle. I initially had it at around 14* and it wasnt happy. Granted on a 6port turbo without the sleeves in there so that the ports are always open you will have a little less compression at cranking and low engine speeds due to the overlap that may make it be OK with that.

Also as far as IRP goes, i wouldnt want a company not comfortable with tuning Megasquirt to tune Megasquirt, Its best to use what your tuner is comfortable with to not end up with a roached motor.

 

Port closing time has nothing to do with overlap. Turbo II and 6 port had basically the same amount of overlap.

 

I originally had my stock port REW idling at 0-5* BTDC and it idled pretty smooth. Saw a few maps with timing around 15-20* degrees and decided to give it a shot. It still idle's pretty smooth, if not better than at 0-5*.

What AFR are you idling at?

 

They're not worried about the high compression, they're protecting themselves and limiting their liability by turning down tuning a semi supported half DIY ECU.

 

I'm running closed loop idle advance and no IAC (yet) so my idle timing is between 8 and 15adv at ~50kPa and 14:1 AFR. I keep it on the lean side so that as load pulls down idle rpm, timing and fuel respond to help maintain it.
This is with no sleeves. As peejay mentioned that doesn't change overlap but does give me a later closing time than a TII. You do get some real slow runner velocities with all 6 ports open. I would guess it likes more timing advance to give the crap atomization and charge motion mix more time to burn.
To dguy's point, the overlap of megasquirt users and people that cut corners to save some coin is probably pretty large. If you have questionably functional hardware, any tuning issue is 10X the troubleshooting work and no one is going to leave happy. A few bad experiences and I get why the group can get painted with a broad-brush. Shops that can't communicate without being obnoxious though... I don't get it.