This is with the end user tunable version of osiris, not the map reflash version. A friend and I tuned it, it was not tuned on a dyno but on the road. It could be possible to get more power as the cheap muffler I had on it had something loose inside of it. 221whp on a mustang dyno isnt to bad for a low compression engine though (at 3800ft elevation). I have never seen a dyno of one without forced induction. So now when I do turbo it I will see how much power I actually gain over a stock built engine. I could possibly gain 5whp with some tinkering but I am not sure it would be worth it haha.

Unplugging the exhaust cams on the dyno has showed me that they are there for more than just a EGR function which I was led to believe. The power loss on the dyno shows this. For some reason the power was smoother with them unplugged. These dynos pulls were done about 10-15s mins apart.

If you want to laugh at my low hp numbers I really dont care.

First dyno with cams plugged in.


2nd dyno with cams unplugged.

 

how much is the user tunable one?

 

I let the appropriate person post, but it's not cheap. You must purchase a minimum of 20 licenses at the time of purchase.

 

thanks for doing the comparison and also for give us an idea of what a low compression VQ35 will be vs the normal compression, but please can you tell us what is your compression exactly, thanks again.

 

the version i have of osiris is the beta. its not available for purchase at this point in time. i may redyno it in a few weeks when im finished with my exhaust. i may also redesign my air intake.
my engine is 9.1 compression with arias ed pistons. i also have right at 24k miles on it. its still running strong and waiting for boost.

 

Thanks for spending the money on the dyno to show us this.

 

I really thought there would be more interest in this, after reading peoples various theories about the variable cams. I may take my car down to uprev when i get the extra money and let them play with the cams on the dyno. I have access to the camshaft tables but I am not that advanced in tuning and do not feel i have the knowledge to tune variable cams. Tuning a/f ratio and timing is no problem though.

I have been thinking it might be possible to sit the exhaust cam in a fixed state after 6400 rpms as that looks like where the ecu kind of freaks out. Setting it at a 0 degree position would probably fix this and the engine would be smoother in the higher rpms.

 

Looks good man, I have scheduled a dyno for the map version to be dynoed in 2 weeks.

 

It is interesting, but this is the first I've ever heard of "unplugging" the exhaust cams. How do you do that? Is it something that you can change from the ECU, or is it an electrical connection?

I see that Cipher can log exhaust camshaft advance. It might be interesting to log some runs and see how it changes.

So you can advance and retard the camshafts with the Osiris online tuning tool?

Curious how you do that without a dyno. I've heard that 13.0/1 is the sweet spot for A/F on a VQ. Do you just set the A/F and ann advance until you hear knock?

How did you determine this? Cipher logs?

 

I believe there is also going to be an individual user tunable version of Osiris for sale, too.

 

Not many people opted for aftermarket cams because cost/gains ratio was reported to be high. Also, it is questionable, IMO, how many tuners on this board are comfortable tuning cams, with exceptions. Additionally, cams tuning currently cannot be done in RTT with UpRev’s Osiris nor is the help file saying much.

Therefore, props to you for bravery of toying with cams. I for one have been and will look forward to learn from your cams tuning. However I am surprised with such big difference with exhaust cams unplugged on a revup, perhaps your base file already have somewhat tuned cams advance angle by UpRev?

Btw, what does byte=80 and byte=C6 equals to, in degrees, as seen from crank? Thanks

 

On the revup you can just unplug the cam connectors on the heads, and it sets them in a 0 degree fixed position and they dont move. The map reflash you guys can buy doesnt have cam timing built in, that i am aware of. I have a different version once again that has access to real time tuning ( and i have access to the cam tables but only the intake cam). The cam tables are in the reflash tool I have, not in the real time tuning so have to make adjustments then reflash to change those settings.

The 2005 and 2006 have factory wideband sensors, that the real time tuning software reads from. This makes it very easy to tune the car, way easier than a utec.

I tuned my base file, uprev did not. I have not tried any of thier pre made maps either. This tune was done on my own, on some backroads. I have had the real time tuning version since late april. Its still in beta and i am not sure when the release date is.

Cipher will log the intake and exhaust cam angles. I have talked to uprev and they are going to set my exhaust cam to sit at 0 degrees after 5800 rpms this should correct the problem and ill verify it on the dyno.

"Btw, what does byte=80 and byte=C6 equals to, in degrees, as seen from crank? Thanks"

I am not sure what you mean by this question.

 

rocks, CAM Advance Tables have these and similar raw values. They represent cam angle but, in order to avoid tampering, I never pushed too much to understand exactly how many degrees these raw (byte) values represent nor if angle is as seen from crank or as seen from cam.

I don’t have revup so variable exhaust cams don’t mean much to me but would like to understand what was the cause of intake cams angle separation (B1 vs B2) as seen in this year old log.

 

My intake cams do that also. I think it may be possible to make the engine run smoother by entering values in the ecu so they dont have different angles. My afr from bank to bank is also different, then it evens out at a certain point. The drivers side of the engine always runs richer than the passenger side.

 

My understanding is that, like ignition timing table(s), cam advance table(s) are shared among B1 and B2. In other words, you can’t have different values for B1 vs B2. As most do, I also have the same problem with B2 being leaner, and in my case, neither Hydrazine’s spacer nor V2 plenum didn’t help.

I am guessing now that cams angle separation was in fact ping result. Maybe now that many more users have Cipher, someone will post logs while engine is pinging (cams, ignition, afr, pulse, rpm).

rocks, I understand that your engine is different but what are your cams table values? Any charts to show us while on back-roads? Thanks

Eagerly waiting for the knock counter because of my Crafordz cats (imploded?) and chattering clutch its hard to hear “marbles in a can” sound of ping.

 

+1

...but, I expect updating Cipher is not high on the list of priorities at UpRev at the moment.

As I remember it was difficult to add because different model ECUs require different algorithms in Cipher.

 

That's interesting. Thanks for the info.

You're pretty brave. I'd be afraid that unplugging that connector would do something bad.

No idea whether the cam timing can be adjusted with the version of Osiris we have. I suspect Jared "could" adjust the cam timing and format it into the binary OsirisROM file, but I doubt he would consider doing that under the conditions Osiris is used.

I am eagerly awaiting that version. I keep thinking about getting a UTEC, but I'm trying to hold back for the real-time tuner version of Osiris.

 

If i were you i would wait for the end user tunable version of Osiris, it really is great for tuning. Unplugging the cams wont do anything bad for your engine except make you lose power .

 

Yeah, I was talking about right now.

 

thanks for the research.......

it seems that the variable intake cam is used to advance the cam for more top end power, while the ECU uses the variable exhaust cam timing to retard the exhaust timing for better low end performance.