speed denisity

[phillytalon]

how many of you run sd vs maf
im debating on switching over I already have the sd it came with my dsm link

 

[Archer Fabrications]

I'm on SD and love it, why continplate when you have everything you need.

 

[ariman]

i'll SD next week

 

[Archer Fabrications]

It's really easy to tune, honestly i can tune SD way better then i can tune a maf, i dont know the first thing about maf tune.

 

[clipto]

SD>maf

 

[Boostdriven]

SD for sure, it might seem more difficult to tune at first but once you get a hang of it you will love it. Make sure you set up your max octane table in direct access first to your desired air/fuel ratios you want the car to run at a given load and rpm that way all you have to do is adjust your VE table to get the air/fuel rations on wideband to match air/fuel estimate which will display the values in max octane in open loop. Also you can mess with your timing in direct access and get it set up close to what you think you will run so later you're not making drastic changes causing yourself more work by having to adjust your VE table again. If my timing map wasn't so aggressive I would share it with you but I'm sure there are plenty of people on here that have nice base timing map that they can share with you, good luck tuning.

 

[phillytalon]

yea I guess ill be switching over this week then, just my tuner said there was no need but looks like im going different direction

 

[WES_393]

What does your setup look like? I agree that Speed Density is a great way to tune, but it's not always necessary.

And not sure if your aware, the DSMLink program is capable of running Speed Density, but you need a MAP and IAT sensor in order to use it.

 

[phillytalon]

hx40 pro meth 272 cams fmic 950 injectors dsm link dual springs lifters

 

[WES_393]

In that case yes, Speed Density would be a good idea.

 

[phillytalon]

yea see I was told the maf will switch to sd after certain hp level, but I believe im just better off going sd since I have it already. the more control on high hp car is always good thing

 

[Rich_Howell]

Getting SD ironed out isn't that easy at times. I've been playing with it for a few months now...and NOTHING drives as smoothly as a well calibrated MAS/MAF. I just don't want to go back to a MAS because I like being able to log other sensors, otherwise I would have done so months ago.

Given your mods, though, SD is a great option. MAF with MAFClamp is also a decent option...and sounds like your tuner is more comfortable with it.

 

[codym]

^ I'd have to disagree on that. It is a bit more difficult to get the hang of but once you get SD dialed in I think it'd knock the shoes off a Maf setup.

Not saying a maf setup Is bad, but if properly used SD is better in almost every aspect.

 

[allthrottle]

I've tuned quite a few different makes with different airflow setups and EMS systems over the past decade. I can't say that I haven't been able to get driveability of a MAF setup with a MAP. MAP has always been easy to tune on, maybe easier than MAF; that really depends on the EMS software. ECMLink makes it all a breeze, and gives you the option to run both.

The best way for you to determine which is best for you is ask your tuner which one they prefer, what they can/can't tune on, and how you want your engine bay to look. Either will get the job done.