Hi all,
I am still mucking around with the SC in the Sierra, I have installed the delphi 25168491 AFM as apparently I was running out of range with the stock MAF.
I have the following mods:
2.8" blower pulley
Extractors and open 2.5" exhaust
1.98 Rockers
Cooling mist water injection.
The Suzi has 3.6 diff ratio with 15" rims.
So far I am seeing 13.5 sec quarters which seems slow to me considering the weight of the car but im open to be corrected on that if someone knows better.
I would have thought it might get down into the high 12 secs?
I plugged in my innovate wideband afr and did a few full throttle pulls.
I was expecting the AFR to be all wrong due the new MAF which I have not corrected in the bin yet
The AFR seemed to me to be fine - I need advice here -
At light to medium throttle guage inicated around 14.3 or so -- hard to see accuately while driving .
Full throttle and AFR dipped to around 12 or so right through the rev range. I thought it should be all wrong. IF anyone can explain i would appreciate it.
I also took a log on tunerpro and the timing seems to be strange - it goes off the scale... Any comments or advice much appreciated. Please see the attached log file from tunerpro.
Ev.
VS V6 SC Mod Bin - Please take a look
VS V6 SC Mod Bin - Please take a look
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- Holden202T
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Re: VS V6 SC Mod Bin - Please take a look
that is the beauty of the MAF if the scalar tables are right for the maf in use then it should be pretty accurate till it maxes out!
I don't really know what the 2.8" pulley does compared to stock, but I know from personal experience that to do a 12.7 over the quarter you need 200hp at the wheels in a 1100kg car ..... and that is with a 4.11 diff ....
so if your car is heavier than that or your making less power than that your obviously going to go slower....
your fuelling sounds pretty right for what your doing so that's a good thing
I don't really know what the 2.8" pulley does compared to stock, but I know from personal experience that to do a 12.7 over the quarter you need 200hp at the wheels in a 1100kg car ..... and that is with a 4.11 diff ....
so if your car is heavier than that or your making less power than that your obviously going to go slower....
your fuelling sounds pretty right for what your doing so that's a good thing
No matter what the question is, the answer is always more horsepower!
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
Advanced tuning of a delco ECM with $12P thread
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
Advanced tuning of a delco ECM with $12P thread
Re: VS V6 SC Mod Bin - Please take a look
OK thanks for the info, The sierra only weighs 950kgs, the 2.8 pulley gives me an indicated 12psi of boost. Im not sure what the power output would be. The only thing that seems strange is the timing in my log file, it kind of jumps about like its going out of range or something....
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Re: VS V6 SC Mod Bin - Please take a look
What ADX are you using?
Spark off the scale may be it going negative, some ADX files are not set for signed spark advance.
Spark off the scale may be it going negative, some ADX files are not set for signed spark advance.
Re: VS V6 SC Mod Bin - Please take a look
Im using the adx which comes with the enhanced mod bin. You are most likely right, that's probably it. Maybe too much knock.
Re: VS V6 SC Mod Bin - Please take a look
are you using the latest version, it was only updated not so long ago to fix this. It's not knock it's just the ADX file for tunerpro does not read the spark correctly below 0 degrees
Re: VS V6 SC Mod Bin - Please take a look
Oh, I better check if I am using the latest version.