Dyno Day

[Pistol_91]

Yesterday I took the car to the dyno to see what it would make on my tune vie been working on for a little while. Made a couple timing changes while I was there trying to squeeze every hp I could out of her but wasn't very effective. Ended up making peak 645/518. Mods are LTH, Borla cat back, ESS G3 120mm G4 intercooler on 93 pump gas no octane booster. I did 7 runs in 1 hour so the car was pretty hot towards the end. It made basically exactly what I was expecting it to mnake so I am happy with the results. Anyone out there running a 115mm pulley? If so, what did you gain or make over the 120mm? No vids since I was in the car the whole time but here's a couple pictures.

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[Shifting_Gears]

Awesome numbers! Car looks great.

 

[Pistol_91]

Thank you sir

 

[engineermike]

What changes did you make? Where did the timing end up? Got logs? Hpt or pcmtec?

 

[Pistol_91]

What changes did you make? Where did the timing end up? Got logs? Hpt or pcmtec?

Got logs yes, it was adding a bunch of timing first 2 runs. I added a little for the 3rd run but then it was pulling timing every pull after that except the last pull where it made 643 again and at that point it was pretty hot and 7 runs in 1 hour, I called it quits. The 93 around here is pretty average. It was liking 13.5 degrees at 7k rpm. Hpt.

 

[engineermike]

13.5 deg is pretty low. Can you post some logs?

 

[Pistol_91]

First 2 pulls I believe it was around 16 or 17. Once I added some and it got hot I guess it didn't like 16 anymore after that lol. I will have to get them off the laptop. I'm on my phone right now

 

[engineermike]

Is your tune pulling timing with mct? Or is it riding knock sensors?

 

[Pistol_91]

I was wrong. Every run it was at 14-14.5 whether it was pulling or adding. After the 3rd run it rained pretty good outside and got humid (I live in Florida). It shouldn't be riding the knock sensors I think the most it pulled in all the runs was 1.5 for a short rpm range. Where it made the most power it was seeing 14 degrees at 7k rpm. 17-18ish around 5-6k.

 

[engineermike]

The timing sounds low even still. I’d like to see where lambda, cam timing, and load were. What about was the boost level?

 

[Pistol_91]

At 7k rpm lambda is .8 cam timing is 15/15 and load is 1.6. 8psi

 

[engineermike]

Ok, not trying to tell you what to do, but some stuff to consider…

- Richer lambda MAY allow enough more timing to net a power gain. You might try something more like .75-.77 and also increase timing. Some ecoboost engines make best power around .70 because the knock suppression.
- Advancing the intake cam sometimes allows more timing as well and can net more power. You might try stopping the intake cam at +5.
- You can run more timing if you can maximize gdi blend. Make sure the warm blend table is 90% at high load, lower eoi clip to 80, and maybe even increase rail pressure to 3000 or higher.

I’ve been able to run over 20 deg timing on a Whipple at 9-10 psi using the above strategy, where it put down 680 on true 93.

 

[Pistol_91]

My first 2 runs lambda was at .78. Figuring I could possibly gain a little leaning it out to .8 but didn't seem so. That's possibly why I seen knock on the 3rd run but that was also the run that made the most power. I was planning on messing with more overlap next time I was going to get on the dyno. I'll check out the gdi and my rail pressure runs at 2900 most times but I've seen it go to 3k before at high rpms. Thanks for the advice Mike I'll check it out

 

[Rolls]

Got logs? Hpt or pcmtec?

Just for anyone reading you can export PCMTEC logs in CSV format to use in megalog viewer HD or other applications if required. When doing advanced filtering or maths MLVHD is a fantastic cheap product which we endorse. Goes hand in hand with Forscan for extending PCMTEC's capabilities.

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