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Calibrating my Stg1 tune after 4-1 EL header install
I justed wanted to share my experiences with the header install on my car (remember to think twice about safety if you think about modifying your rom):
Decided to keep my current tune (Stg. 1 with altered maf scaling etc.) and to update the missing bits. Went with the Stg. 2 EL cam maps and their corresponding ignition tables. I'm running 102 octane fuel, so there's an extra safety net. The lower half of the rpm range felt great right from the start. I couldn't feel the torque dip any more. The engine pulled just linear from down low to top. Sound became great as well. :cheers: There are a couple of things I noticed:
Before:https://i.imgur.com/d3xUzhJ.png After:https://i.imgur.com/gCrRkcP.png Now from this point onwards, I could go two routes: A) adjust timing for my fuel and call it a day or B) get the necessary tools up and try to tweak the cam timing. |
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Very interesting, forgive the ignorance but Stg1/Stg2 EL sounds like OFT tunes correct?
I'll be getting my OFT soon and later on a 4-1 EL header as well (been drooling over the ptuning one). I'll be watching this thread to see how you go about adjust the cam timing. sub'd |
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If you buy P-tuning header new, ask the-tuning guys for the cam tables |
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JDL EL 4-1
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It's been a while since the OP. Unfortunately, I had to wait until the winter was over to get stable ambient temps.
Base maps were OFT v4, so the values in the 'cruise area' are original. All the data in the tables about load 1.1+ have been determined with the help of vgi's mafscaling tool. All values between cruise and wot have been smoothed manually. I'm still concerned about the 4200 row in the exhaust table. It just looks wrong, but that's what the mafscaling tool came up with even after multiple tries to de-verify the results. I've tried to use the highest gear possible, but most of the pulls were done in 3rd gear due to traffic and in particular because I don't want to hand out my driver's license. :) I would not promise that I leave them in the current state, but here's a snapshot, nevertheless. If anyone dares to test, please leave a comment here. Code:
Exhaust retard: Code:
Intake advance: |
Small update
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Cam maps updated. Power is much better in the lower rpms and the transition from cruise to WOT.
I actually had to pull some percent out of the first third of the DBW torque request maps to not run into drivability issues. There are some improvements in the last thousand revs as well! :party0030: PS: The latter vdyno pic is from an old run with the stock header. Found it somewhere on my hard drive. Felt like posting it for a good laugh. |
What software do you use for tuning/editing the rom file?
The interface looks very much like Ecuedit that I used to. |
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A friend of mine has a skunk2 EL 4-1 catless header
so do you think these cam settings are better than the normally used taken from OTS v2 stage2 EL? |
I don't know if a Skunk header will benefit from my tables, since the calibration was done with a JDL. It could run better or worse compared to the OTS tables. But never perfect.
Closest relative imho is the P&L header. Runner layout looks nearly identical, although that doesn't mean anything. If runner diameter, length and stepping are different, the tables won't fit. PS: I always thought the OTS EL tables have been developed on a gutted stock/HKS header type of thing. |
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Have fun!
:burnrubber: |
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