JerikSS

iTrader: (2)

I want to be able to run more than one boost setting on my set up. I have done research and it seems that SD tune would be the way to go. What do I need to run an SD tune?? How hard is it to maintain the tune? How much more does it cost over the normal dynotune? How will it do on my daily driver??

Superman09

iTrader: (65)

I believe from what i've gathered you need to ditch your MAF and replace your MAP with a 2 bar or 3 bar MAP. 2 bar is boost levels from 1-15 psi i believe and 3 bar is 1-30 PSI. i may be wrong on these numbers but am pretty sure all you need to do is ditch the MAF and swap your stock 1 bar MAP for a 2 bar or 3 bar MAP. The MAP is located on the back of the intake manifold FYI

markp03

iTrader: (4)

you need to do what was said above and then obviously get it tuned....i think it would be the best to tune it yourself so you can make changes based on the weather, thats what i will be doing.

LTLHOMER

iTrader: (10)

I don't run the stock computer, but speed density is speed density and I've not yet touched my tune and I've run it at all kinds of different boost levels. I log my afr and it's been fine so far.

You shouldn't have to constantly tune your car unless you're looking to get every last millisecond out of the car.

JerikSS

iTrader: (2)

What would I need to get my sd tune started? Do you remove the maf completely or do I just unplug it?? Do I remove any other sensor besides the maf? Where can I get the 3 bar map sensor?

LTLHOMER

iTrader: (10)

Can get 3-bar map from GM dealer or something similar...dunno the p/n off-hand but you can do a search and find it quickly.

The other questions I do not know...you could probably leave the maf if you wanted but you'd prolly make a few buck by selling it and then it would be out of the way and not an eyesore.

JMBLOWNWS6

iTrader: (17)

Im running a 2 bar setup with HPT custom OS.

I used the 2 bar map from a GM. Just had to cut off a mounting tab on the sensor and it was plug and play.

GM PN# 12223861 3bar MAP
GM PN# 16040609 2bar MAP
GM PN# 16137039 1bar MAP
GM PN# 15305891 - pigtail harness

longrange4u

iTrader: (2)

What software are you guys using to monitor and adjust the tune on your SD?

MECHAM

iTrader: (4)

hp tuners..

frcefed98

iTrader: (16)

GM PN 12580698

Is the 2 bar Sensor

JMBLOWNWS6

iTrader: (17)

Hmm I used the part number I listed and and it referenced to the cobalt ss

JMBLOWNWS6

iTrader: (17)

I had to change the scanner to 2 bar. I was when I couldnt monitor when I went into boost. Opps Im using HP tuners.

longrange4u

iTrader: (2)

Ok so does this mean that if you want to run more than 15lbs you need to go with a 3-Bar tune? How hard is it to tune with an HP tuners?

markp03

iTrader: (4)

yup a 3 bar will get you to 30#'s of boost. from what i hear SD is easyer to tune then with the maf...

FormulaFire

iTrader: (20)

So what do us 98 guys do if we want to run more than 15#? I know HPtuners only came out with a 2 bar for 98s recently. And I def plan on running More than 14.7# of boost..

JMBLOWNWS6

iTrader: (17)

I had to build my VE table from scratch. Actually its still being built. I wouldnt say its easy at all.

longrange4u

iTrader: (2)

Ok so if I purchase a 3 Bar MAP... and I purchase the basic licence of HP Tuners (8 Credits right?) then I can tune my car with a 2 bar or 3 bar if I choose? How difficult is it truly to tune your own car? If its easy why isnt everyone doing it? Is there somewhere good to learn more about tuning a Speed Density tune?

For those of us who really dont know... can someone do a detailed explanition of why a SD tune is so much more valuble than the standard MAF tune for us FI guys?

Thanks!!

FormulaFire

iTrader: (20)

I'm in the same boat longrange. I really want to start learning how to do my own tuning. But I think I'm going to get a Big Stuff 3 and go that route instead of HPTuners.

frcefed98

iTrader: (16)

The PN I listed has been the PN thats been used for sometime when going two bar with the GM PCM on a LS1 F body. I've been running it in the car since feb.

either way if both work its all good right?

J

KyleW93z

Speed density is not the easiest thing to do by any means, and ditch the MAF, its just a airflow restriction. Im using TTS Datamaster and TunerPro, but im on a lowly 93.