booz

Hi. I want to make my car and tune it with speed density. How do I do it? What parts I need? Currently I have slp lid, stock maf ported and 90mm ls6 intake modified by TPIS. The intake does not have the hole where I see you guys put the sd sensor in the Front. Any help please.

redtan

iTrader: (5)

There's no "SD" sensor. You just unplug the MAF (or remove it completely) and boom you're in speed density.

Although at this point, given your expertise level in tuning (or lackthereof) you're better off taking it to an actual tuner to do this. It's not as simple as unplugging the MAF, you also have to tune some things in order for it to run in this new mode.

Cosmik de Bris

Speed Density is based on a MAP sensor (Manifold Air Pressure) which you already have. The LS1 with a MAF uses both systems to calculate airflow. You need to fail the MAF correctly to get to SD mode. Do a search, there are plenty of articles that tell you how to fail the MAF and then how to tune the VE tables. You are best to use a wideband O2 but you can use the fuel trims to tune.

Always2Slow

iTrader: (8)

Most people will not and do not need to run a SD tune. The only time I would recommend it is you have even a 85mm or more MAF maxed out, its a track only car where all you care about is numbers and that last 5 rwhp will net you a better time or your boosted. You fall into any of those categories? Put the screen back in your MAF by the way if your car is running like crap.

Paul Bell

iTrader: (9)

We have a speed density faq/open thread in the PCM Diagnostics & Tuning section: https://ls1tech.com/forums/pcm-diagn...uning-faq.html

You'll get better answers over there AND this is the INTERNAL ENGINE section. You know, pistons, rods, bearings....