Is there a setting in transient fuel tab that will help with throttle response and lag/hiccuping when hard acceleration is made at lower RPM's?
Is there a setting in transient fuel tab that will help with throttle response and lag/hiccuping when hard acceleration is made at lower RPM's?
yes, you can adjust manifold volume
Follow @MASTUNING visit www.mastuned.com
Remote Tuning [email protected]
Contact/Whatsapp +966555366161
Only adjust it if it's a lean out issue during stomps or more rarely - overly rich during stomps... This won't do anything for timing being pulled out during stomps...
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
Is that the only tab to adjust?
you need to post a log of whats going on, the issue will be more clear
Follow @MASTUNING visit www.mastuned.com
Remote Tuning [email protected]
Contact/Whatsapp +966555366161
So the manifold volume only impacts stomp lag? I was hoping it also would help with lean tip in on light throttle as well.
My understanding is that manifold volume impacts on all transient fueling through a mathematical model, tip-in and tip-out included, so I would suggest getting it right first and then continuing with other parameters if needed.
where is manifold volume located in the editor?
fuel transient section, u may still have to request it also if u cant see itOriginally Posted by andrew1988
Anyone know how Tranisent Fueling differs on the E40? We don't have a Manifold Volume parameter. I have increased Transient Warmup Base Mass from the stock value of 10 to 500 (currently) and still have lean spikes doing major throttle transitions - enough that there is a hesitation before fueling catches up
Mind posting your tune - it can be a base file - doesn't have to be your current tune... I thought all gen 4's had this capability and just needed to be requested? I know it's not available on gen 3's...
IF it's indeed not available all you have to do is modify your main transient table - it's actually not that hard to do...
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
Sure. I don't have my computer with me, so the latest file I have is from a backup from two months ago
Have you tried requesting it? I just double checked and some of my E40 cals have the manifold volume... You may just need to request it from HP Tuners... If it's not available I can tell you what to roughly change...
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
What's the parameter number on the E40s you've seen it on? I requested for #12003
Well I guess I'm going blindJust went back and looked at the ones I thought were E40's, only they were E38's
Anyway, under transient fueling - impact factor - gas - start at around 80kpa and multiply that entire row by 1.1 then next row 1.2 then next row 1.3... That should get you much closer for a boosted application. If your not boosted, multiply by 1.05, 1.1 and 1.15... Do the same to the evap factor table for gas as well since they kind of go hand and hand - they'll both add fuel, so keep that in mind on how much you increase them by... I've never messed with the accel/decal table even though I imagine that could do something for decels?
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
Well I guess I'm going blind
Anyway, under transient fueling - impact factor - gas - start at around 80kpa and multiply that entire row by 1.1 then next row 1.2 then next row 1.3... That should get you much closer for a boosted application. If your not boosted, multiply by 1.05, 1.1 and 1.15... Do the same to the evap factor table for gas as well since they kind of go hand and hand - they'll both add fuel, so keep that in mind on how much you increase them by... I've never messed with the accel/decal table even though I imagine that could do something for decels?
I'll give it a shot when I get the car driving again. Having an issue with clutch hydraulics not bleeding properly right now and I'm worried the master cylinder is shot. May have to wait until spring so I can ditch the T56 for a 4L80
Got the trans working well again and tested transients out today the way you described. Reset all transient values back to stock then applied a similar scheme to what you described with an increase of 25% at the uppermost bound. That one adjustment made it VERY close. So that seems to be the trick for the E40. I had been on the right track previously, but was changing the wrong values and not making it any better. Thanks again
Just a few easy rules to remember on transients... First don't change them where you typically drive or idle - I don't go any lower than 80kpa now - it will change the air fuel at which your wanting to run - in other words you increase it with something like a cam for instance where your rpm fluctuates up and down from the natural lope - it will idle at a richer air fuel ratio then lean back out at lower map values like where you cruise - I had one idling at a 14.1 afr doing this then cruising at a 14.7ish afr
Follow the basics - use them to your advantage how you will and you should be OK
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
The first time I actually tried making transient changes, I actually flooded the engine so bad during cranking that it wouldnt turn over, so I know how sensitive some of those changes can be lol.Just a few easy rules to remember on transients... First don't change them where you typically drive or idle - I don't go any lower than 80kpa now - it will change the air fuel at which your wanting to run - in other words you increase it with something like a cam for instance where your rpm fluctuates up and down from the natural lope - it will idle at a richer air fuel ratio then lean back out at lower map values like where you cruise - I had one idling at a 14.1 afr doing this then cruising at a 14.7ish afr
Follow the basics - use them to your advantage how you will and you should be OK
Reply With Quote