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Accel Variable

Started by hakcenter, July 27, 2015, 10:41:54 PM

Rx7man

I could see it behaving strangely if your float was a bigger number than an INT could hold.. causing an overflow that doesn't get trapped
'94 dually,  67/67 HE351VE, NV5600, ~600hp
'93 ECLB 47RH, new toy truck, H pump project, 1000hp goal, 300K miles
93 XCLB auto, bone stock, 350K miles
93 XCLB 5spd, bone stock, 100K miles

hakcenter

Ya except at idle, accel is either -1, 0 or 1
TS2009 Deḇarim 8:2
"And you shall remember that יהוה your Elohim led you all the way these forty years in the wilderness, to humble you, prove you, to know what is in your heart, whether you guard His commands or not.

Rx7man

Ah.. I haven't studied the new code in a while...

I'm thinking of doing my turbo install when I get the 6 speed tranny so I don't run into any tranny mount interferences with the new pipe.
'94 dually,  67/67 HE351VE, NV5600, ~600hp
'93 ECLB 47RH, new toy truck, H pump project, 1000hp goal, 300K miles
93 XCLB auto, bone stock, 350K miles
93 XCLB 5spd, bone stock, 100K miles

hakcenter

That would be a good idea, especially if you use a 4" downpipe. My pipe fits with a 1/16th clearance next to the trans and then the frame too
TS2009 Deḇarim 8:2
"And you shall remember that יהוה your Elohim led you all the way these forty years in the wilderness, to humble you, prove you, to know what is in your heart, whether you guard His commands or not.

Rx7man

I notice a lot of my exhaust is getting pretty raggedy.. and when I was looking at it I figure I can run a straight piece of pipe all the way from the front to the back if I tuck it up a little higher and toward the frame a little more, and then I don't need a hump to get over the rear axle, which would simplify things a lot... Probably put a flex piece in just after the DP.

I can't remember.. did you use the 12V manifold or did you use the one for the turbo?  That would change the requirements a fair bit.  I think the auto tranny may be wider too, but I hear the NV5600's are beasts as well
'94 dually,  67/67 HE351VE, NV5600, ~600hp
'93 ECLB 47RH, new toy truck, H pump project, 1000hp goal, 300K miles
93 XCLB auto, bone stock, 350K miles
93 XCLB 5spd, bone stock, 100K miles

me78569

My 4" downpipe has a hole rubbed in it, 

Anyways I gotta say the changes to the shaft speed calc sure did help.  I am not able to run 16 reads vs 32 reads without any spikes.  Very snappy and VERY responsive in terms of what I would expect to see the turbo speed doing when I am on/off the throttle. 
2000 Dodge 2500 quad-cab 5.9 Cummins slt, homebuilt 47re revmax 3.5 messed with vb, Quad adr iquad, 4" tbe , pureflow 150 gph. he351ve in the works 100hp DFI inj

hakcenter

Quote from: Rx7man on November 03, 2015, 09:54:50 PM
I notice a lot of my exhaust is getting pretty raggedy.. and when I was looking at it I figure I can run a straight piece of pipe all the way from the front to the back if I tuck it up a little higher and toward the frame a little more, and then I don't need a hump to get over the rear axle, which would simplify things a lot... Probably put a flex piece in just after the DP.

I can't remember.. did you use the 12V manifold or did you use the one for the turbo?  That would change the requirements a fair bit.  I think the auto tranny may be wider too, but I hear the NV5600's are beasts as well

stock late 2nd gen no egr with adapter plate.
Quote from: me78569 on November 04, 2015, 06:38:24 AM
My 4" downpipe has a hole rubbed in it, 

Anyways I gotta say the changes to the shaft speed calc sure did help.  I am not able to run 16 reads vs 32 reads without any spikes.  Very snappy and VERY responsive in terms of what I would expect to see the turbo speed doing when I am on/off the throttle. 

ya surprising when I spend more than a day coding things, thinking it through. I was timing a lot of sections and adjusting things. Overall I'm very happy with how everything is running, I'll get some more time maybe next week or so and remove the bottom end jitter (which is possible) so hopefully I can find a simple approach and get it dialed in.


On another note, I haven't honestly noticed any difference mpg wise between using cruise and not using it at all. I don't know if maybe the curves aren't aggressive enough though they seem to be just right to my ass dyno... /shrug

I think I'll re-adjust my cruise switch to be perf and start working on that. I also want to move the curves from ints to longs, to help with people possibly making them larger than they should be causing issues.
TS2009 Deḇarim 8:2
"And you shall remember that יהוה your Elohim led you all the way these forty years in the wilderness, to humble you, prove you, to know what is in your heart, whether you guard His commands or not.

me78569

#52
I would agree that I don't really see any MPG difference in ANY of the curves I have.  running the turbo at 12 cm or 14cm only vs the curve or vs etc etc doesn't seem to matter.

Strange to me, but oh well.  I can drive with 0 drive pressure with the turbo set wide open and get the same MPG as 9cm with 10 psi of drive hahah.

I should upload my code at some point, it has changed quite a lot since the last time you helped out.
2000 Dodge 2500 quad-cab 5.9 Cummins slt, homebuilt 47re revmax 3.5 messed with vb, Quad adr iquad, 4" tbe , pureflow 150 gph. he351ve in the works 100hp DFI inj

Rx7man

What are your boost pressures?  I found with my HX35, a 70mph cruise (4:10 gears ~2300 RPM) I usually need about 10 PSI boost or 15 PSI drive... pushing a headwind or with a trailer it'll quickly double, and my mileage CRASHES
'94 dually,  67/67 HE351VE, NV5600, ~600hp
'93 ECLB 47RH, new toy truck, H pump project, 1000hp goal, 300K miles
93 XCLB auto, bone stock, 350K miles
93 XCLB 5spd, bone stock, 100K miles

me78569

Cruising at 55-60

boost seems to settle around 5ish psi with my current curve, bout 9cm typically

12-14cm curve bosot settles around 1-2

25cm boost and drive are 0. 

I was pretty surprised to not see much difference in mpg between the curves.

2000 Dodge 2500 quad-cab 5.9 Cummins slt, homebuilt 47re revmax 3.5 messed with vb, Quad adr iquad, 4" tbe , pureflow 150 gph. he351ve in the works 100hp DFI inj

Rx7man

5 PSI is nothing.. you won't notice a difference at that pressure.. but you start putting 15-20 PSI load on it and you do notice it... I'm going to start experimenting in a while
'94 dually,  67/67 HE351VE, NV5600, ~600hp
'93 ECLB 47RH, new toy truck, H pump project, 1000hp goal, 300K miles
93 XCLB auto, bone stock, 350K miles
93 XCLB 5spd, bone stock, 100K miles

me78569

It is just strange how quickly mpg falls off with the hx35 as soon as you hit 5 psi.  The 351ve doesn't have that same issue.
2000 Dodge 2500 quad-cab 5.9 Cummins slt, homebuilt 47re revmax 3.5 messed with vb, Quad adr iquad, 4" tbe , pureflow 150 gph. he351ve in the works 100hp DFI inj

Rx7man

I'm always at about 8-10 PSI on my truck
'94 dually,  67/67 HE351VE, NV5600, ~600hp
'93 ECLB 47RH, new toy truck, H pump project, 1000hp goal, 300K miles
93 XCLB auto, bone stock, 350K miles
93 XCLB 5spd, bone stock, 100K miles