Got Data? Dyno Video from EMC2013

[dieselgeek]

Who doesn't like a good dyno pull?

This is a snippet of the video and data overlays I am putting together for the 2013 EMC Throttle's Performance team to review. This is the very first pull we made at the event - AFRs and timing are not well sorted at this point, we picked up around 20hp more after tuning, to a peak of 738hp on our 428 cubes.

Anyhow, this gives you an idea of the data we capture and use for extreme fine tuning onsite at the event.

http://www.youtube.com/watch?v=6kQGp-fHuFc&feature=youtube_gdata

[NewEnglandRaceFan]

cool..
1 question, is there a reason you'd not already have the tune very close, or is it, but you are super anal at this type event that it's close but not perfect?
or is this the pull from the team you helped/filled in, when they needed someone as their guy was not able

[dieselgeek]

cool..
1 question, is there a reason you'd not already have the tune very close, or is it, but you are super anal at this type event that it's close but not perfect?
or is this the pull from the team you helped/filled in, when they needed someone as their guy was not able

Great question. This was one I worked on from the beginning, made two trips up to Fargo during the year to test it. But...

The engine had lots of problems during pre-event testing, bad enough that we had to have a second set of heads made (CNCd, lots of hand blending, etc). Mostly our issues were pushrods hitting the walls and some areas poked into intake ports, causing air leaks and oil consumption. So the tune was never even close to good before the event. Mark got the problems fixed, and we had to use much of our 30 minutes at the competition making last minute tuning tweaks before submitting our competition pulls. First year engines are at a disadvantage compared to the better developed engines that have been under development for a longer time.

[BigAL]

Mostly our issues were pushrods hitting the walls and some areas poked into intake ports, causing air leaks and oil consumption.

That was a problem I had with the 406, the problem was my rocker geometery was off and I needed longer pushrods. I got one of those pushrod checkers and found out I needed .250 longer pushrods, once I installed them the pushrod didn't hit the head anymore.

And one question under duty cycle on the video is that a percentage?, noticed it didn't go much higher than 40.

[Barry Donovan]

that was pretty cool.

I would love to see the big bouncing flip flop on an old boxer. with all that measuring
Those v8s tip it like tea.

[jcharliem]

That was a problem I had with the 406, the problem was my rocker geometery was off and I needed longer pushrods. I got one of those pushrod checkers and found out I needed .250 longer pushrods, once I installed them the pushrod didn't hit the head anymore...

OMG, ROTFLMAO!!!

Dude, the problem with telling empty tales is they always catch your own ass. Rocker geometry on the 406?...LOL! Is this the small-block in the '71 Camaro that you once claimed was dyno'd at Sunnyvale Auto with +600hp?...then you retracted that claim when questioned? (Oh...but wait...you don't give any credibility to dyno's.) Or, is this the small-block that's been sitting in the '71 Camaro for like 10 years that's never once been fired? This is just too funny to read your meandering tales.

Question to the Mods: Why do you continue to allow this clown to pilferage this site? It's embarrassing to you guys.

[BigAL]

OMG, ROTFLMAO!!!

Dude, the problem with telling empty tales is they always catch your own ass. Rocker geometry on the 406?...LOL! Is this the small-block in the '71 Camaro that you once claimed was dyno'd at Sunnyvale Auto with +600hp?...then you retracted that claim when questioned? (Oh...but wait...you don't give any credibility to dyno's.) Or, is this the small-block that's been sitting in the '71 Camaro for like 10 years that's never once been fired? This is just too funny to read your meandering tales.

Question to the Mods: Why do you continue to allow this clown to pilferage this site? It's embarrassing to you guys.

Yes small block in '71 Camaro that I built myself, I had that same problem with the pushrods hitting the head, my first fix was to just grind the pushrod holes bigger so they wouldn't hit, that is how I learned the hard way and punched a hole into one of the runners, which I ended up getting sleeved. Been there done that, the pushrod checker showed what my problem was. Though on the motor in the video and how custom it is, it could be a number of things.

And sorry if my experience doesn't hold up to your checkbook, and why don't you go troll another site, because picking fights with me is the thing the mods don't want to see. Realize they are neutral and see both sides for who they are.

[Monk]

Who doesn't like a good dyno pull?

This is a snippet of the video and data overlays I am putting together for the 2013 EMC Throttle's Performance team to review. This is the very first pull we made at the event - AFRs and timing are not well sorted at this point, we picked up around 20hp more after tuning, to a peak of 738hp on our 428 cubes.

Anyhow, this gives you an idea of the data we capture and use for extreme fine tuning onsite at the event.


http://www.youtube.com/watch?v=6kQGp...=youtube_gdata

Excellent!

Jim Evans did six pulls on the 409 to get where he wanted to be on the engine.

[Scott Liggett]

Yes small block in '71 Camaro that I built myself, I had that same problem with the pushrods hitting the head, my first fix was to just grind the pushrod holes bigger so they wouldn't hit, that is how I learned the hard way and punched a hole into one of the runners, which I ended up getting sleeved. Been there done that, the pushrod checker showed what my problem was. Though on the motor in the video and how custom it is, it could be a number of things.

And sorry if my experience doesn't hold up to your checkbook, and why don't you go troll another site, because picking fights with me is the thing the mods don't want to see. Realize they are neutral and see both sides for who they are.

I think the problem DG was talking about was the increased dimensions of the intake ports encroaching the push rod holes. You can have the same problems even on a sbc where offset shaft rockers are necessary.

[CDMBill]

Excellent!

Jim Evans did six pulls on the 409 to get where he wanted to be on the engine.

It is incredibly informative to be able see what happens cylinder by cylinder as the engine is loaded down and then begins the pull. The eight AFR's and the 8 trim guages gives a sense of what is happening inside the manifold and the engine at idle and lighter loads before the pull and then during. Even on this early pull you can see how the cylinders come into line on the AFR/Trim gauges.

It's really amazing what we can do these days for so little money compared to even five years ago.

[ka67_72]

Are the trims programmed or are they happening on the fly?

Kevin

[dieselgeek]

Are the trims programmed or are they happening on the fly?

Kevin

Both. Theres a trim map for each cylnder, then a closed loop correction also for each cylinder.

[milner351]

Cool!

[Dignlif]

This is really cool Scott thanks for posting it. It's crazy to see how everything is on it's own path before you start wrangling it in. I didn't think there would be that much difference in afr for example, with a baseline feed that is fairly similar for all cylinders. It really shows the granularity of control you're adding by adjusting individual runner injection vs a carburetor showering down. neat stuff, I'm getting a better understanding of the inner geek this feeds in the local efi tweakers on here