Is speed density really worth it ?
#1
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Is speed density really worth it ?
Question
I'm new to the evo world
I have a evo 9 on speed density
Mods:
Ets upper,lower and fmic
ID 1000
255flp
Fp4r2 cams
APexi exhaust
Speed density
Car made 317 and 300 on a mustang dyno
Now
The guys who tuned it said they hate speed density and it's not necessary
Unless I'm making big power
They said the reason I'm losing my drivability and my idle surge is because it's on speed density
Does this sound right ?
I'm new to the evo world
I have a evo 9 on speed density
Mods:
Ets upper,lower and fmic
ID 1000
255flp
Fp4r2 cams
APexi exhaust
Speed density
Car made 317 and 300 on a mustang dyno
Now
The guys who tuned it said they hate speed density and it's not necessary
Unless I'm making big power
They said the reason I'm losing my drivability and my idle surge is because it's on speed density
Does this sound right ?
#2
EvoM Community Team Leader
iTrader: (60)
from the info i've gathered, that is correct. the MAF isn't very restrictive and works well unless you are pushing enough air out of a turbo that it's in the way.
on the bright side, it's easier to drive the car if you have an intercooler pipe blow off LOL.
i, personally, haven't found a reason to go SD, but i'll never be making more than 400-500whp.
on the bright side, it's easier to drive the car if you have an intercooler pipe blow off LOL.
i, personally, haven't found a reason to go SD, but i'll never be making more than 400-500whp.
#3
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Location: Boring Oregon
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I agree with some of that.......
But there are things that SD is good for even with no power
Sd doesn't require you to pull fuel with air like a maf
So you can up mpgs, get overall better driveability and your already half way to most big turbo requirements already if you decide in the future you want more power...
I think your tuner is just unable to calibrate SD and is trying to cover up his weakness by steering you away
Perhaps find a good tuner
But there are things that SD is good for even with no power
Sd doesn't require you to pull fuel with air like a maf
So you can up mpgs, get overall better driveability and your already half way to most big turbo requirements already if you decide in the future you want more power...
I think your tuner is just unable to calibrate SD and is trying to cover up his weakness by steering you away
Perhaps find a good tuner
Last edited by SR Concepts; Jun 17, 2015 at 06:10 PM.
#7
EvoM Community Team Leader
iTrader: (60)
i actually thought about that. i've done it before. i just can't remember if i had to do open loop the whole time or if i could just do it for my cruise cells. only one threshold setting can be set, correct?
i also kinda remember that my car didn't like cruising a whole lot more lean than 14.7, though. i think i remember it not liking 15s. it's been a few years.
maybe i'll play with it once BoostedTuning is done with the tune.
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#8
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Still seems slightly easier just to go SD if your not tuning it yourself like the OP
I'm not entirely opposed to running open loop in any fashion, but I maintain a bit of skepticism
I'm not entirely opposed to running open loop in any fashion, but I maintain a bit of skepticism
#11
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Your tuner can't tune SD. Find a new tuner.
#15
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My tuner can tune SD
He tuned the famous jasmine Evo off YouTube
He was just saying I lose drivability and its more difficult to fine tune
I just wanted some pro and cons on SD vs maf
But I'm getting the idea
I believe I'm going to stay SD
Thanks everyone
He tuned the famous jasmine Evo off YouTube
He was just saying I lose drivability and its more difficult to fine tune
I just wanted some pro and cons on SD vs maf
But I'm getting the idea
I believe I'm going to stay SD
Thanks everyone