Question,
If the normal RPM is used, does the ECM use the 4096 RPM cell in the equation for RPMs above 4096, or is normal RPM dropped out of the equation above 4096 and the ECM is left with just, boundary - ECT - make up?
Question,
If the normal RPM is used, does the ECM use the 4096 RPM cell in the equation for RPMs above 4096, or is normal RPM dropped out of the equation above 4096 and the ECM is left with just, boundary - ECT - make up?
I have a stock cam with tons of negative overlap so there is no chance of fuel making its way out of in open exhaust valve (also know as short circuiting) if thats why you suggest targeting SOI when EVC event happens. I am also basing my IVO and IVC numbers on 0.050" lift which is conservative.
I think you do have a point that 527* for EOI is a little late. After looking at a piston velocity graph, and being reminded where most of the "meat" under the curve was I am going to do some trials with EOI somewhere between 450-490. Those EOI values are a little later than the PPV EOI of 433* you suggested. I am doing this in an attempt to account for the delay between piston velocity and intake air velocity (not travel time to cylinder as calculated in the excel tool).
Let me know what you guys think.
ok yea with a cam and no overlap just aim for the intake valve like stock but just not as advanced, it can help having it sit on the closed valve so just see what it likes, for cruise just see what your PW is like and adjust the cruise rpm areas to see if it helps, i dont think there are as big gains for stock cam but still some if u play around with it
hello i have 15 degree overlap cam ls3 camaro ss , i had lot of back fire when im hit the paddle from 800 to 2000 rpm , i add 10 degree to boundary the back fire is gone , but when the engine temp. hit 203f it start back firing from the intake when im hit the gas paddle at low rpm only ?? any help please ?
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
When I said you wouldn't like it that retarded - I was referring to the lower rpms... It needs to transition gradually into the more retarded levels in the higher rpms...
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
yea if u zero the RPM then just use the boundary to do RPM cos it has much better scale, what's the spark like there maby a bit more could help the backfire if it's missing ?
something is going on if it's getting backfires either way, how's the fueling sounds like a lean tip in ?
is your VVE dialled in also it does get used for transients still ?
What is the theory for modifying EOIT for a cold engine? It seems like the factory calibrations have it advanced when ECT is low then retard as it warms up.
Ported TVS1900 OD cogs 10.5psi | ID850 | Vaporworx CTS-V 1:1 | COMP 219/233 .606"/.605" 113+1 | Ported TB | Pacesetter 1 3/4 LT | Solo Mach X3
Depends on cam and setup... A lot of overlap with a blower for example will probably want it to be all the same number or a touch advanced when colder - it won't like the traditional full advancement like the OE settings at all however whereas a less overlap cam will like it... If you really want to dial it in - use fuel trims and do multiple cold starts to dial it in for the different temps...
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
Ported TVS1900 OD cogs 10.5psi | ID850 | Vaporworx CTS-V 1:1 | COMP 219/233 .606"/.605" 113+1 | Ported TB | Pacesetter 1 3/4 LT | Solo Mach X3
Best and most straight forward advice I can give - aim to keep ppv right in the middle of eoi and soi except for high rpms where you will keep eoi after fuel to port time is included at around 15 to 20 degrees before ivc... Especially where your running a PD blower The eoi is about 15 to 20 hp sensitive - you can loose that much with it being off that little and then more if it's off more...
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
Thanks, I've updated the DOCs tab with some more notes as well as a few definitions
Ported TVS1900 OD cogs 10.5psi | ID850 | Vaporworx CTS-V 1:1 | COMP 219/233 .606"/.605" 113+1 | Ported TB | Pacesetter 1 3/4 LT | Solo Mach X3