Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

Need tune program for LT4 383 w/comp 305 cam

Thread Tools
 
Search this Thread
 
Old Dec 28, 2002 | 05:19 PM
  #1  
clb95z28's Avatar
Thread Starter
Registered User
 
Joined: Jun 2002
Posts: 31
From: Austin,TX
Need tune program for LT4 383 w/comp 305 cam

Car is a obdI 383, LT4 top & bottom end, comp 305 cam, crane gold race 1.6 rr's, as&m headers, 30# SVO injectors, ~10.8:1 compression, M6 car. I've got a program for a comp 306 383 in right now but the car is running very rich. Need suggestions/files please I can only upload, no "tuning" capabilities.
Cody
Old Dec 29, 2002 | 04:04 AM
  #2  
Jason Dove's Avatar
Registered User
 
Joined: Sep 1998
Posts: 561
From: Vancouver, BC, Canada
What are your BLM's at after 20 mins driving... if they haven't bottomed out (108 I believe), you're okay... if they've bottomed out, there's a couple ways of leaning out. Try lowering your VE's entries, works for some, doesn't work for others (me)...

If that doesn't work, you can massage your MAF table, OR you can change your injector size, you've hopefully have it set for 30 pounders... set it for about 33's or so. That'll lean it out, but you'll have to compensate your Power Enrichment tables to make up the slack at WOT. [Experiment and Scan!! I haven't actually done this, I know people who have though and they're happy with it.]

As long as your BLM's are above 108 (or is it 106.. can't remember) then you're okay, the computer is using the O2's to lean it out, just takes a bit of driving before it figures things out. I have 110-114 BLM's in pretty much every cell and I pass CO Emmisions just fine [richness indicator].
Old Dec 29, 2002 | 06:30 PM
  #3  
clb95z28's Avatar
Thread Starter
Registered User
 
Joined: Jun 2002
Posts: 31
From: Austin,TX
Well I tried a different flash program today and it really helped smooth things out. After driving 20 min I hooked up datamaster and logged about 20 more mins of driving. Everything seems to be in order. My blms range from 110-126 durring "normal driving" and they hold steady at 128 when I'm at 50% throttle or more. No spark retard at all!!
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
F'n1996Z28SS
Cars For Sale
8
Aug 23, 2023 11:19 PM
dbusch22
Forced Induction
6
Oct 31, 2016 11:09 AM
oldschool
Parts For Sale
16
Feb 9, 2016 09:21 PM
transam_388
LT1 Based Engine Tech
9
Mar 15, 2015 11:53 AM
djangoroar
Parts Wanted
2
Feb 21, 2015 11:47 PM




All times are GMT -5. The time now is 05:20 AM.