Is running speed density friendly to someone new to tuning?

[DSMTyson]

Since you have link you dont need a calculation. Start a log and see what your set up is actually flowing

He won't know what his accurate airflow is until he calibrates the entire MAFComp table.

 

[Calan]

He won't know what his accurate airflow is until he calibrates the entire MAFComp table.

...and has his injectors flow tested with DSM ECU drivers, and is sure of the fuel delivery.

 

[turboglenn]

ON your irignial question YES, there's so much less to learn, worry about or have interfeiring with your basic tuning tables as farasthe MAF is concerned,I wouldn't go back to a maf system for anything except just to useit as a datalogging option tomeasureotal airflow since SD uses air temp, manifold pressure and barometric pressure to determine the airquality, then uses RPM vs.manifoldpressure to makethe basic desicion on pulse width and timing with a few trimming tables to make up for air tempsand coolant temps (to take advantage of them or save your engine if they are way too hot)

 

[TexasTurbo]

^^ = a lot of tweaking tables before it's right. I think DSMLink and some of the more expensive standalones really hit it out of the park by letting you build maps based on the MAF in the car and then switch them over to SD. This takes a LOT of the pain part out of the initial swap to SD based air metering.

 

[GSXftw]

I am running a GM maf in blow thru. Take a look at my MAFraw readings at higher RPMs... Tons unstable.... Lots of MAF comp... I plan on going to SD very soon... Hope its the right decision

 

[turboglenn]

Also, I'd like to add your turbo won't spin up and blow apart from an IC pipe coming off. Being that the turbo can't blow air into the engine when it's disconnected, the extra air from it doen'st get in to be converted to exhaust through combustion. So unless you're driving constantly with your foot at 100% TPS and an IC pipe off the turbo will nut recieve enough exhaust flow to get up to dangerous shaft speeds.. Funny how people who get scared of a certain setup/system will try and make it out to be bad or evil because they don't understand itenough to tune or run it, or other's who've had one thing go wrong, put that together with internet rumpors like the above and then perpetuate the "tales od SD corruption"

Also, you do have to retune when making some changes that effect the engine's breathing ability but not for every little thing. I have changed intake pipes in major amounts, degreed cams and much more with little to no tuning at all to work with it.. Sure my WOT pull AFR's may have went from 11.8:1 to 11.9 or 11.7 but for me it's still a safe zone. I haven't seen anything that can pull the exact same AFR to a perfect .1 variance time after time because there's too many variables no matterwhat your air metering system.

AT least you guys with ECMlink have a choice and can dabble in either one and choose the one you want.. some people are stuck with their system in one fashion and they may or may not like and accetpt it but you guys can play both fields. ** Hint for you.. at the track talk yourself up and tell some one you'll even pull your main air flow sensor and race them, if you know you're faster then them toss it in SD, pull the MAF and startthe betting.. if you can't win just let them think it's magic or convince them to pull one plug wire in trade

 

[TexasTurbo]

So maybe I'm not understanding, but are you saying that the compressor has to be compressing air into the motor to make the turbine side spin up fast enough to ruin the turbo?

 

[ramsack]

A turbo acts like an infinite loop. As it injects more air, more exhaust comes. Take away that boost going into the engine and you simply don't have the air or heat to spool the turbo fast enough to destroy it.

 

[turboglenn]

A turbo acts like an infinite loop. As it injects more air, more exhaust comes. Take away that boost going into the engine and you simply don't have the air or heat to spool the turbo fast enough to destroy it.

Couldn't have been put any better. And on my own car i've driven for about an hour (almost 50 miles) with a blown coupler once and had many more other IC pipe blow offs where i had to drive 10-20 minutes to get to tools to fix it and it's never done any damage to my turbos.

 

[Rsawd95dsm]

I know this is kind of an old thread but what im quite not under standing is do you need a GM MAF to run SD? Or an Evo maf with SD? or can you run a stock MAF with SD?

 

[Calan]

SD doesn't use a MAF...in fact, it's completely different than using a MAF.

 

[Rsawd95dsm]

So lets just say if i bought the speed density set up from ecmlink in theory i could get rid of all MAF in general? So i could just buy SD and run with it?

 

[TSITurbo95]

With SD you DO NOT need a maf. The map that DSMLink gives you for SD is just a base map. Some people can run it fine and tweak it, others need to heavily mod it.