Edit>PropertiesQuote:
Originally Posted by DaddySS
Volumetric Efficiency values:
Display in: "default units (g*K/kPa)"
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Edit>PropertiesQuote:
Originally Posted by DaddySS
Volumetric Efficiency values:
Display in: "default units (g*K/kPa)"
Oh yeah, forgot, thanks!!!
np.... :)
OK, I first tried using the throttle cracker table from the original tune since it was almost double in the area where the lean condition is occuring but it affected drivability more than it helped the lean condition. Adjusted the main VE per SSpDmon's recommendation and that seems to be doing it, I'll continue to tweak that and see where I am from there.
Thanks!
Another question - when moving from a stop, is the throttle response controlled or affected by the cracker or the follower - mine seems a bit sluggish for instance when backing out of the driveway which is on a very slight incline.
Yes...sort of...Quote:
Originally Posted by DaddySS
This is my take on things. How accurate it is, well, IDK for sure. But, it seems to make sense to me...
An engine's 'eagerness' to go is determined primarily by two things: air and timing. Fueling is the easy-to-set variable when working with a WBO2. So, we can kinda discount that based on the assumption that fueling is accurate. Obviously, giving the motor more air will allow it to make more power as it will be matched with more fuel and a stronger explosion in the cylinders. The more timing you throw at the motor, the more it will want to get ahead of itself (to a point). That's one reason why tuners throw more timing at a cam'd car. Instead of futzing with the IAC, they can compensate by adding more timing. The problem is, too much timing will cause surging when you're coasting down the road. That's why you need to find the right medium. I don't need 30* of timing at idle to get my 232/238 cam to stay running. I'm actually working on dropping it down (currently under 24*), which is allowing me to get rid of that last 5% of surging I have left every once in a while.
Anyway, back on topic. If it feels sluggish you can try one of two things: get the IAC to add more air via the cracker or follower or try a little more timing.
The other thing you should keep in the back of your mind is the cam's efficiency. The stock cam (according to the stock VE table) was much more 'efficient' at lower rpms than your aftermarket cam. That might be what you're feeling - that loss of efficiency - if you were used to the stock cam for so long.
Don't mean to hijack daddyss's thread but I have a Q for spddmon.
Is that 232/238 cam the Lunati Voodoo cam?
OK, spent the last two nights dialing in the VE and I now have it close to....well excellent anyway. The lean condition is just about completely clear, virtually no bucking, good idle, deceleration and power. I am going to play with the timing correction later but for now I just want to drive and enjoy!
Thanks again for all the help!
No, I don't think so. I think it's just a rare Comp grind. Don't know for sure though given the previous owner didn't pass on too much info.Quote:
Originally Posted by ViolatorTA