Help please...MAF, or MAF-less??? - LS1TECH



PCM Diagnostics & Tuning HP Tuners | AutoTap | Diablo | MAF Translator | HPP3 | FAST | Gen7 | Big Stuff 3
Sponsored by:
Sponsored by:

Help please...MAF, or MAF-less???

Reply
 
Thread Tools Search this Thread
Old 04-17-2012, 06:01 PM   #1
Teching In
Thread Starter
 
Join Date: Jul 2011
Posts: 5
Default Help please...MAF, or MAF-less???

Guys, I'm going for a new tune setup as I've just moved from 800 feet elevation to 4200 feet. The car was previously tuned without a MAF on speed density tune using HP tuning. I bought the car that way. Now, I'm contemplating if a MAF tune will be a better way to go? Pros and cons to either way? And with my setup will a stock MAF be adequate? Or larger? If larger, which options are best and easiest? Car is an 01 Z06, 408 forged stroker. 11.5:1 CR, Dart 225 heads, 236/244 on 114lsa-.625/ .625 lift, 42lb injectors, FAST ported to 92 intake and throttle body. ARH long tubes, catless mids, stock ti exhaust for now.

Only problem currently is the elevation change and during idle it sits at 1000rpm and seems to after about 30 seconds of idle, switch into open or closed loop possibly and then runs EXTREMELY rich. So much that raw fuel can be seen out the exhaust and the smell. Did this even at 800feet. Any tuning guidance or input is def appreciated guys.
pbdrew15 is offline   Reply With Quote
Old 04-17-2012, 08:40 PM   #2
TECH Enthusiast
iTrader: (2)
 
Join Date: Jun 2008
Posts: 702
Default

I would use a MAF, but honestly it sounds like it never was tuned right in the beginning.
gectek is offline   Reply With Quote
Old 04-17-2012, 10:00 PM   #3
10 Second Club
iTrader: (18)
 
dodson55's Avatar
 
Join Date: Nov 2010
Location: monticello, ky
Posts: 491
Default

i would not use a maf just get a good tune on it and you will be fine
dodson55 is offline   Reply With Quote
Old 04-17-2012, 10:59 PM   #4
Teching In
Thread Starter
 
Join Date: Jul 2011
Posts: 5
Default

Lol so which is it....I know that a SD tune isn't going to adjust for altitude and temperature will it? I'm looking for some good tuners opinion and knowledge...
pbdrew15 is offline   Reply With Quote
Old 04-18-2012, 11:45 AM   #5
TECH Junkie
iTrader: (1)
 
redtan's Avatar
 
Join Date: May 2008
Location: Belmont, MA
Posts: 3,723
Default

Quote:
Lol so which is it....I know that a SD tune isn't going to adjust for altitude and temperature will it? I'm looking for some good tuners opinion and knowledge...
It doesn't adjust for altitude, but it does adjust for temperature...that's why you have an IAT sensor which is used heavily in SD calculations.

So unless you plan on driving to the top of a mountain and then back down, I would not be scared to run an SD tune given the varying weather conditions.

Been running SD now for about 3 years and have gone through 90* humid summers and 10* bone dry winters with no issues and I always keep an eye on stuff with a dashhawk and wb installed.
redtan is offline   Reply With Quote
Old 04-18-2012, 12:22 PM   #6
TECH Addict
 
SladeX's Avatar
 
Join Date: Nov 2005
Posts: 2,363
Default

An SD tune will just not be as efficient as a MAF tune when elevation changes come into play. The difference should be just barely noticable.

What it sounds like is that right now the tune is just off.
SladeX is offline   Reply With Quote
Old 04-18-2012, 05:03 PM   #7
Teching In
Thread Starter
 
Join Date: Jul 2011
Posts: 5
Default

As a daily driver and the fact that I live at 4200 feet and within 100 miles in any direction the elevation can go up and down 1200 feet. Will SD be able to compensate for those type of changes? What if I want to drive the car to Florida or Cali, what then when it's at sea level with a SD setup that was tunes at 4200?
pbdrew15 is offline   Reply With Quote
Reply


Tags
altitude, iat, location, ls1, mafless, tune

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off



All times are GMT -5. The time now is 12:56 PM.