Vector resurrection -

**RBT** · 02-15-2018, 08:25 AM

Originally Posted by 1BadAction

AHHH nice. Same stuff. Here's a screencap I grabbed from the virtual machine inside my Linux PC. It's going to take a bit of work but I think I can use quite a bit of that info in the box I'm working on. Knowing the idle and WOT vacuum is a big piece to getting one started and fired up, although I'm sure as hell not going to guinea pig with a nic motor, especially a drag. LOL.

now you just need the m/s. ...

**1BadAction** · 02-15-2018, 08:27 AM

Originally Posted by Capt.Insane-o

If you know what your looking at this is why you don't cruise around the lake with an A6 with a stiff prop and bitch when you stick. Anyhoo..........now were getting into the cool shiz about how stuff works

Exactly, I noticed a few interesting differences with the A6, A13, and a couple other maps while comparing them.

**RBT** · 02-15-2018, 08:30 AM

Originally Posted by 1BadAction

Exactly, I noticed a few interesting differences with the A6, A13, and a couple other maps while comparing them.

Remeber they were all purpose built, a6/a8/a10/a13/a14 were all drag/s3000 blocks with different intakes and heads and mostly purpose. Loaded motors have a lot of fuel cooling built in

**FMP** · 02-15-2018, 08:35 AM

Originally Posted by RBT

Those offsets are factory merc. Very few of the guys that just play with mapping touch them. Only with lots of dyno time (pressure sensors and exhaust gas analysis) will you be able to eke much more.
Remeber, and this was missed in fongs chest. These motors get help from above, that help requires fuel. All six holes do different amounts of work.

You've probably missed the pages of posts were this topic was beat up, the reasoning and effect of the mods.

**1BadAction** · 02-15-2018, 08:40 AM

Originally Posted by RBT

Remeber they were all purpose built, a6/a8/a10/a13/a14 were all drag/s3000 blocks with different intakes and heads and mostly purpose. Loaded motors have a lot of fuel cooling built in

All I know is it's damn sure nice to have merc stuff to look at instead of shooting at this totally blind. You can only do so much without a dyno and a bunch of $$. I'll be happy if I can get a wet reed downdraft to run clean on my 7 petal 225 and clone the A13 tune on a non-merc box for my 2.5s. I have no desire to sell anything or race.

**patchesII** · 02-15-2018, 09:19 AM

Originally Posted by FMP

You've probably missed the pages of posts were this topic was beat up, the reasoning and effect of the mods.

I saw it and I'm pretty sure Rob did too. As I said in a previous post, compare it to a factory Drag chest. Mercury didn't make it that way for no reason. Remember, flow isn't everything if it flows in the wrong places. I'm not about to give away everything I've spent tons of money, time and effort to learn but I highly advise the shade tree guy to copy a Drag or 280 block

**FMP** · 02-15-2018, 09:23 AM

Don't expect you to. Again, just the +%, how were the motors sensored. The full array, where?

**patchesII** · 02-15-2018, 10:09 AM

Mercury did that on their dyno's. Those are the factory Drag maps. Likely with egt's. I don't work there and not sure exactly what they had at their disposal but I do know guys have spent years trying to find more out of the engines and some do find slightly more but much more often they go backwards in horsepower and torque when they start porting on one

**Ziemer** · 02-15-2018, 10:13 AM

Are you reading vacuum via a gauge on the intake, or can you read it real time off a DDT? (Other than reading RPM's or adjusting overall fuel percentage, never paid attention to it) First time I've ever seen a fuel map from a Mercury box.

**RBT** · 02-15-2018, 10:25 AM

Originally Posted by Ziemer

Are you reading vacuum via a gauge on the intake, or can you read it real time off a DDT? (Other than reading RPM's or adjusting overall fuel percentage, never paid attention to it) First time I've ever seen a fuel map from a Mercury box.

we are reading the vacuum on AIM telemetry, fuel values that we are running are recorded.
FMP, the a6 map was done at merc, likely before pressure sensors were readily avaliable. Same with exhaust gas analysis. Since then, the better motors engineers are using multiple pressure sensors and gas anlisys.

**RBT** · 02-15-2018, 10:27 AM

This is A13. The latest eyebrow port, SVS map.

**patchesII** · 02-15-2018, 10:38 AM

Originally Posted by Ziemer

Are you reading vacuum via a gauge on the intake, or can you read it real time off a DDT? (Other than reading RPM's or adjusting overall fuel percentage, never paid attention to it) First time I've ever seen a fuel map from a Mercury box.

I've been wanting to post the maps for awhile now so the average lake guy could see what Mercury did and it works bad**. I let my laptop go home from Jasper with a buddy or I'd post more and even post AIM data, what it shows and how we use it. I talked to Rob earlier and we talked about doing a thread like this to show what drag racers are doing, not that they're anything special but we do spend a lot of time and money to chase a tenth of a second and some of us are lucky enough to be friends with really sharp guys that teach us. Only thing now is do we start a whole new thread. Might even post the stuff Dave Bush posted on FB about our big project last year so the people that aren't on social media could see it. Really was a neat project and I learned a ton

**FMP** · 02-15-2018, 10:41 AM

All well and good for drag blocks etc but apples to oranges for a standard comparison to the porting Dave applied. Wonderful data which cannot be directly used with certainty for any gain with his motor.

**patchesII** · 02-15-2018, 11:17 AM

I'm not getting what you are trying to say. Your post is poorly worded

**RBT** · 02-15-2018, 11:49 AM

Originally Posted by FMP

Fine, all well and good for drag blocks etc but apples to oranges for a standard comparison to porting Dave applied. Wonderful data which cannot be directly with certainty used for any gain with his motor.

If what he did was 27 years ago when the 2.5 became readily available to the world I’d be interested in what he was doing, but fact is all he did had been tried. We knew the results before he was done. It wasn’t revolutionary. The other issue, those that don’t know might follow or even pay to have those mistakes repeated. His expert that he was listening to... I’d google him