Nitrous Oxide - Speed density tune with nitrous??

Hey guys I have a forged ls1 with ported 243 heads and a ms3 cam, I will be spraying a 300 shot at the car sometime this year. I need to get my car retuned and I was wondering if I should do a speed density tune. Would it help for nitrous? What would be the benefits of going with a speed density tune? Thanks guys!

No power difference in speed density or a MAF tune....
2 different ways to get to the same end result.

a MAF is better at Day to Day compensation and will be more consistent at WOT
but SD has benefits too...it tends to have a crisper throttle response as you are telling it the fuel instead of the pcm looking at airflow and then calculating how much fuel it needs

unless you use a HP Tuners custom OS, you will be using the secondary VE table without the MAF(on 98-00 cars) and you will be using the low octane spark table without the MAF(all cars)
so without a Custom OS, staying with the MAF has benefits over SD.



wet shot or dry shot really makes no difference on either...

Thank you for the response. so a SD tune wont hurt my car's performance on nitrous?

Thank you for the response. so a SD tune wont hurt my car's performance on nitrous?

nope...not one bit...
I'm a perfect example...
I cant use a MAF due to my extreme setup and I have an aftermarket pcm doing SD....
dual direct port dry shot....and not a small one ;)

ok cool. i have to get my car retuned so i think going to go speed density. ive heard that the car will run a little better and have better driveablity. and plus i want to get rid of my restrictive maf. a stock pcm can handle a SD tune just fine right?

ok cool. i have to get my car retuned so i think going to go speed density. ive heard that the car will run a little better and have better driveablity. and plus i want to get rid of my restrictive maf. a stock pcm can handle a SD tune just fine right?


the MAF is usually not a restriction unless you still have a stock one with a bigger TB
once you upgrade the TB you should upgrade your MAF to match
they make 100mm MAF's and 104mm Lid's ;)

the car will run the same in SD or using a MAF... its all about how good yoru tuner is...
driveability will be identical either way if tuned properly.


and yes...the stock pcm can handle a good and proper SD tune

the MAF is usually not a restriction unless you still have a stock one with a bigger TB
once you upgrade the TB you should upgrade your MAF to match
they make 100mm MAF's and 104mm Lid's ;)

the car will run the same in SD or using a MAF... its all about how good yoru tuner is...
driveability will be identical either way if tuned properly.


and yes...the stock pcm can handle a good and proper SD tune

as of right now i have a slp lid with a stock maf and a 92/92 setup. so i was going to run a ftp 98mm with no maf. would you recommend going SD or go with buying a bigger maf?