Swapper

iTrader: (10)

ok so im not goin to be driving my car much and wanna just run the car on open loop speed density. is there somewhere or someone that can show/tell me how to set up a basic O/L SD tune on my setup?



info on my setup:

2001 5.3l
2000 4l60e
GT500 H122 blower
36lb injectors
vic jr intake
HPTuners

i have no maf and no o2's on my harness.

ive had it running for a little while but it doesnt seem to like it.

i did try searching but it finds sooooo many random things.

Old Geezer

iTrader: (3)

Posting the tune file is a start........

Swapper

iTrader: (10)

Oh sorry I'll do that in a little. right now it's basically a stock 01 5.3l tune.

Swapper

iTrader: (10)

ok heres what i got. um i tried zeroing out the maf airflow tables and i believe that was when it likes to run a little better.

sorry im a noob to tuning and no im not going to tune this thing myself im just trying to get it driveable so i can take it to get tuned.

FreshDA9

I haven't looked at the tune.. But are you still on a 1 bar factory map sensor? if so you need to upgrade to a 2 or 3 bar. Also im assuming this is the 2001 0411 pcm, if so you need to do a custom operating system to run so you can have positive pressure tables added to the pcm for boost.

If running the car without both of those things will be a disaster.

Swapper

iTrader: (10)

just curious why i would need a 2 bar map if a 1 bar is good for 14.7psi and im only boosting about 7psi? also ive never heard of anyone having to make a custom operating system. please explain.

ive built 3 boosted cars and never had an issue with needing a custom system. of course they were turbo but its pretty much the same.

ive just never set up a open loop speed density tune.

tempoffroad

im new at this but believe that atmospheric pressure us 14.7 ie one bar to go above that it need to be 2bar to go to say 30lb witch is actually only 14lb over atmospheric pressure.

FreshDA9

1 bar is 14.7 Absolute or also known as Atmosphere. to add 7psi on top would mean you need a 2 bar. please see my picture related to this.
as you can see 7.3psi is actually 22psi absolute. So yes you do need a 2 bar if you dont wanna blow this thing apart.


As for custom operating systems, the 0411 PCM's load can only go to 105KPA. you need a COS to go beyond 105KPA for boost. This is referring to EFILive but i would imagine HP tuners also has their own word for COS.

All in all you need a map sensor and a software to correctly scale the sensor and tune the car.

Swapper

iTrader: (10)

ok so ill need a 2 bar map. do i need that to put it in O/L S/D? or can i do that now and then buy the 2 bar credits?

Swapper

iTrader: (10)

so i found these steps on hptuners website that someone posted. going to try them out and see if thatll work. ordering a 2 bar map here soon.


- multiply Primary VE by 1.15, ( I don’t have secondary VE)
- set “DFCO” to 284˚F ( and I have stall RPM to 925)
- set EQ vs RPM table to 1.13
- set PE table to 1
- set STFT open loop to Disable
- set TFT to Enable
- min ECT to149˚F and Max ECT to 284˚F
- set “closed loop Enable coolant Temp vs. IAT” to 284˚F
- set COT to Disable
- copied high octane table to low octane table
- set MAF fr. To 0

FreshDA9

I am unsure how HP Tuners does it, EFI Live doesn't use the credit system on Operating Systems they are free.

You can force open loop speed density the way it is now, but you will be stuck to 1 bar and the factory 105kpa operating system. So yes you could get it running and drive-able to get the car to who is doing the tuning.

Swapper

iTrader: (10)

yeah thats all i want for now is to be able to roll it around and then get tuned. i have the bypass valve ziptied open so i cant even get into boost if i wanted to.