Lateral-g Forums - Camaro XV

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Quote:

Originally Posted by mikels (Post 579786)

MAF sensor allows more precise air measurement as well - when you think about it, mass air calibration is calculating the mass air flow from MAP, displacement and RPM to determine engine operation. Better to measure actual mass flow and redundantly calculate for better control.
Dave

Thanks again for the detailed response and willingness to share. Those additional E67 sensor inputs make sense - similar actually to what I see with the late model Mustang GT500 tunes we've done, although the Mustangs are messier because of the "torque demand" throttling strategy.

I completely agree with all you said, but I think you might have meant to say that Speed Density calibration is calculating mass air flow from MAP/RPM/displacement? I'd completely agree that a properly calibrated MAF sensor is not only precise, but also provides compensation/insurance against all kinds of other variables that affect air mass (intake manifold heat, intake valve temp, spark variation due to knock retard, etc).

Quote:

Originally Posted by formula88 (Post 579680)

Here's a video from the final road course session (about 1/3 into it).

It gets really wild about two minutes in :D.

Some really sweet driving by all and a great perspective on how hard these guys track their cars.

Thanks for the video Gordon. :thumbsup:

Quote:

Originally Posted by PTAddict (Post 579790)

Thanks for catch - corrected my faux pas!

I think most OEM's are using similar strategies for forced induction - it allows much better 'picture' of engine operation and more hooks for control.

OEM software and calibrations calculate injector tip temperature, intake valve temp and many, many other parameters that impact engine operation - all this results in more precise control (and closer operation to the edge while maintaining safe operation).

Dave

Quote:

Originally Posted by Lous69 (Post 579568)

Mark,

My favorite part of the day Saturday was when I was watching you make a pass on the Autocross. When you finished your run and idled by, a nice gentleman next to me nudged me and said "That's my son". I said "You are Mark's Dad? You must be very proud. He's an engineer's engineer and one heck of a nice guy who doesn't let all of his success go to his head."

As a proud father myself, I could see how proud he was in his eyes and maybe even a little emotional crackle in his voice.

That was a very cool moment.

Lou

Lou

Thanks for sharing the story. I'm glad my Dad was there.

Mark

Quote:

Originally Posted by Stielow (Post 579788)

Professor Mikels has spoken. I don't even mess with it any more I just do what Dave says and it works and hauls a$$....

Sadly I was unable to confirm.... LMAO

Quote:

Originally Posted by camcojb (Post 579791)

Thanks for the video Gordon. :thumbsup:

Anytime buddy. You helped make it possible :D

Quote:

Originally Posted by formula88 (Post 579798)

Anytime buddy. You helped make it possible :D

Yeah, I guess I did, huh??!!! :)

Quote:

Originally Posted by GregWeld (Post 579795)

Sadly I was unable to confirm.... LMAO

I was the driver in that Viper and I can confirm, that thing did haul a$$ but the driver looked slow at first all crunched up against the wheel. boy was I wrong :bump:

This thread is full of "win" on so many levels !!:thankyou:

Quote:

Originally Posted by mikels (Post 579792)

OEM software and calibrations calculate injector tip temperature, intake valve temp and many, many other parameters that impact engine operation - all this results in more precise control (and closer operation to the edge while maintaining safe operation).

Dave

Sorry, but this is BS. According to many of our muscle car era customers, all you need is a box full of carb jets and a timing light :) OK, maybe also a flashlight to inspect plugs.

It is actually amazing to use software like HPTuners or EFILive on a modern ECU. The number of of different aspects of engine/transmission operation that are modeled in these on-board computers is mind boggling, and yet they all make sense when you take the time to understand them.

Sorry to divert the main Camaro XV thread, but I just love this stuff.

Now, if only we could use a computer to tune out the inherent disadvantages in handling/braking/areo of a 69 Camaro!

Scott