Results 1 to 10 of 138

Thread: Sanity check, please...

Threaded View

Previous Post Previous Post   Next Post Next Post
  1. #3
    Lifetime Member Rich Z's Avatar
    Join Date
    Mar 2006
    Posts
    291

    Default

    Quote Originally Posted by BLK02WS6 View Post
    I would rethink the MAF idea - I would not do it that way - If you work on the SD tune, you can get it to be just as responsive as a MAF tune.
    Can you tell me WHY you suggest that?

    Quote Originally Posted by BLK02WS6 View Post
    Other than that:
    -You have several lean spots in the VE - most noteably in the 4000-5200 RPM range - need to richen all of those up using the BEN factor. You are also going very lean under boost.
    Can I ask how are you determining that? When I did the VE calibration using BEN, here's one of the MAPs I used to then modify the VE table:



    Quote Originally Posted by BLK02WS6 View Post
    -You are commanding way too rich too soon - using the commanded fuel vs RPM table (B3647) to command boost fueling is not the way to go - that will cause the car to be too rich when rolling into the throttle, and it will bog. May not see it going straight to the mat, but rolling in you will. The way I do it is to command naturally aspirated fueling in the 100 kpa column of B3647 - then, use the PE based on RPM table (B3618) to command boost fueling - do this by setting B3613 to around 110 kpa (may need to vary this a little to get the right transition). Make sense?
    Well, actually ALL of the throttle I have been using have been rolling into it. And I have not experienced any bogging at all, at any rpm. Well, except maybe at very low rpms in sixth gear just to see how the engine responds. In the tune and log I provided I do not have PE enabled at all. I thought to calibrate the MAF, I should have PE completely out of the equation. And I am presuming that I'm not using the VE table neither as I thought I am running off of the MAF and not the VE table at all. But I won't be shocked at all to learn I'm doing that wrong and all is not as it seems to me.

    Truth be known, when I looked at my logs early on, it appeared to me that I was seeing a big gulp of air giving me a LEAN condition at throttle engagement. I may have been trying to address that a while back or else my trying to correct another problem affected that particular part of the tune. Some of these tables are like pulling a loose thread on a garment and then seeing where the pull shows up from that thread.

    Quote Originally Posted by BLK02WS6 View Post
    -Why not use the boost timing table? I set the HO table to naturally aspirated numbers, and then use the boost timing table to pull based on boost - this is much more accurate than trying to do it in the HO table alone...
    Well, I don't know. I thought I WAS using it. Did I miss something that should enable it? Honestly their are a lot of tables and enablers for timing, so I'd be lying if I said I have a good handle on all the options. :( So what am I missing with doing it the way you are suggesting?

    Thanks for your help!

    In case it's not understood, I AM a newbie at this and struggling through trying to learn this stuff. So I am not going to be embarrassed or get defensive if someone tells me I'm doing this completely wrong. The tutorials here are NOT designed for newbies at all. And yeah, the information is on this site, SOMEWHERE, and in bits and pieces. But from what I can see about the longevity of new people coming here, NO ONE has the patience to read through each and every post on this forum in order to put all the pieces together into a coherent picture. So I've been spending most of my time LOOKING at the tables and descriptions, then looking for the answers to specific questions when I hit that wall. So yeah, there are going to be gaps in my knowledge "base". Just wanted to clarify the level I am working from....
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	ben1_28_008.jpg 
Views:	257 
Size:	95.7 KB 
ID:	15407  

    CorvetteFlorida.com

    2002 Corvette Z06
    427 RHS block built by LME
    STS rear mounted twin turbos
    It nearly died on the operating table, but I'm bringing her back.

Similar Threads

  1. Sanity check of logs
    By stigmundfreud in forum Gen IV V8 Specific
    Replies: 3
    Last Post: July 5th, 2010, 11:33 AM
  2. Sanity check please
    By Forcefedperformance in forum Gen III V8 Specific
    Replies: 8
    Last Post: June 9th, 2010, 12:52 PM
  3. sanity check of semil-OL OEM tune
    By stigmundfreud in forum Gen III V8 Specific
    Replies: 3
    Last Post: October 5th, 2008, 12:05 PM
  4. Sanity Check on Commanded AFR
    By Kevin Doe in forum General (Petrol, Gas, Ethanol)
    Replies: 4
    Last Post: October 23rd, 2007, 03:34 AM
  5. Sanity check, please?
    By critter in forum General (Petrol, Gas, Ethanol)
    Replies: 13
    Last Post: September 19th, 2007, 02:14 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •