rworcester

As you can tell I'm not an expert in this tuning stuff yet. But it is my understanding that the cylinder air mass can also be calculated by IAT and MAP, which is what the sped density tune uses. The timing chart is in RPM vs Cylinder Air Mass so it is important to monitor when tuning the car.

Haddixj

iTrader: (1)

ok thank you, I have been saving bits and pieces of info from the posts I come across when people have different issues in HPT. ON your wideband did you put it through the EGR input to reference it?

RonSSNova

iTrader: (3)

Good news!
I believe Cyl Air is calculated from MAP, RPM, TPS and IAT.
You will note the timing table uses it.......

I would go ahead and set the table you made all nines to 0. It's your safety net if it sees KR.

Have fun!

Ron

rworcester

I have the MPVI Pro unit which gives you 4 inputs to data log whatever you'd like. I wired the widerband into one of those and then used the math parameters to convert the voltage to an AFR in VCM Scanner. My wideband needed a formula of [input voltage]/0.5+9.8.

I did set the min timing table back to 5 degrees. Heading to the track tomorrow to see what she'll do now. It definitely feels a lot faster.

Haddixj

iTrader: (1)

Ok, thank you again. I have the PRO also so I could do that as well, I didn't remember reading that.

truckdoug

iTrader: (25)

so weird, I was having the same problems. same fixes.

no idea why it didnt do this with the previous motor/turbo combo



which table is this?


I have so many questions about your tune. I though you were running 80lb injectors boost ref'd base pressure at 4 bar, but you have the lb/hr scaling set to 116 across the board?

now I have the truck all put back together maybe we can get together on your dyno

rworcester

Good news - At the track this weekend the timing worked as expected. 13 degrees down the track, until IATs got a little too high (150 F) so it pulled 3 degrees out. It was a warm day with IATs starting at 105, so we will address that problem later.

I did find out that I'm running out of fuel pump. Current setup is a Walbro 255LPH and Boost a Pump drawing out of the top of the stock carb'ed tank. Looking to sell the Boost a pump/255 combo and buy one in line fuel pump. Would the Bosch 044 or Walbro 450 pump be enough to handle ~700 tire? Trying to keep fuel system as simple as possible so not looking to go dual pump, and trying to avoid buying a sump tank.

truckdoug

iTrader: (25)

can you put a pump in the tank? The 450 in the tank will do it--math wise. Maybe do the 4303 pump if you can't?

3 window

iTrader: (1)

The AEM380 flows better than the 044 and is an economical choice. Not gonna help if you're looking for an in tank, but something to consider if you sump it.

rworcester

I am looking at the AE380. I have the stock tank, so would the "right way" to do this be welding a sump on the tank, and in line AEM380, and a boost reference FPR? I think if I can sell the 255/Boost a Pump, I won't paying out of pocket be too much

rworcester

Or could I just replace the 255 with a AEM380 and have it suck out of the top of the tank?

RonSSNova

iTrader: (3)

I'm running ID 1000's which are 97lb/hr at 3 bar. I'm running a bit higher than 4 bar base pressure.
that flow rate comes from ID's data.

That table is called Knock Retard Min Timing
so that's the lowest the timing will go when retarding.
aparrently it's in effect for torque management as well.

Let me know when you are ready!

truckdoug

iTrader: (25)

dang I cant find that table !

i'm looking at

engine>spark>retard


is it called min spark advance in some OS's?

RonSSNova

iTrader: (3)

Correct.
open the table and it's called MaxSparkRetardLimit vs RPM

Fat Jesus 808

iTrader: (5)

A single 450 will do 700whp