Speed density tune with nitrous??
#1
Launching!
Thread Starter
Join Date: Oct 2011
Location: Phenix, AZ
Posts: 280
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
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!
#2
8 Second Club
iTrader: (16)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
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...
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...
#5
Launching!
Thread Starter
Join Date: Oct 2011
Location: Phenix, AZ
Posts: 280
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
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?
#6
8 Second Club
iTrader: (16)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
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
![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
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
#7
Launching!
Thread Starter
Join Date: Oct 2011
Location: Phenix, AZ
Posts: 280
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
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![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
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
once you upgrade the TB you should upgrade your MAF to match
they make 100mm MAF's and 104mm Lid's
![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
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