question for those adding part throttle timing?
Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
question for those adding part throttle timing? how do yo guys go about adding timing to part throttle and what ranges do you do it? i had a little more timing in but in some cells when i free reved i think it was causing kr or some burst knock maybe. some guys say the car runs better with more part throttle timing so im just interested in the range that is chagned. like 1400-3000 up to .44 g/sec, some range like that is what im looking for, and how you did it
Be careful adding too much, PT still has different loads which can lead to problems. How I did mine was to PT up a semi steep grade, making sure I was not in WOT cell, then added some timing, repeated as necessary. That ensures that when there is little load the increased timing wont matter, but wont knock at higher load still good.
Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
ive got your tune so ill take a look at it and see. ive messed with it a little bit but no more tahn a half a degree, how much are you guys actually adding?
TECH Resident
Joined: Aug 2004
Posts: 875
Likes: 2
From: Portland Oregon
I added 3-5 degrees below 2400 rpm in those cells that are at 13 or 15. Pretty much brought them up to 18-20 in all of the lower cells. Not real scientific, just highlighted a verticle row and added to the cells that needed it so none are below 18. Results: Made my car totally drivable with a 233/239 cam. Before, it was a slug below 3000, now it feels like a normal car with a cam. Scan --- 0 knock with 11.5:1 on Super unleaded.. I lowered the VE in that same area a few weeks ago, it helped but the timing finished the job.
Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
ok cool, i redid the whole ve table by hand to get it smoother and take out all the dip while keeping the other areas plus or minus a half. if you guys can, can you post up a screen shot of your table, number and 3d? ill put mine tonight, maybe it will help us all out who are trying to mess with it more
Trending Topics
Is it just me or did anyone else have KR with the stock table in closed-loop operation in and around the 1600-4000RPM/.32-.60kpa range? I don't know if I could get away with adding timing in. Is it because I still have the stock cam?
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
I just pasted in a C5 (not Z06) Vette spark map and went from there. It much hotter in the midrange area than the F-Body one, really crispened up the throttle response.
See if you can find a C5 bin that your tuning software can read, if you're using LS1-Edit let me know and I'll send you the ones I use.
See if you can find a C5 bin that your tuning software can read, if you're using LS1-Edit let me know and I'll send you the ones I use.
Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
crainholio, what is the midrange area you speak of, like what rpm and airflow?
well i got some weird kr on my car when i give it gas at idle, can you guys check this thread out and reply and let me know what you think? thanks
https://ls1tech.com/forums/showthrea...02#post3188902
well i got some weird kr on my car when i give it gas at idle, can you guys check this thread out and reply and let me know what you think? thanks
https://ls1tech.com/forums/showthrea...02#post3188902
I added a crapload of timing where I was getting no-load chugging 800-1200 rpm. I set it to 35* for 800-1200 rpm/0.8-.16 g/cyl and it helped. That's the only part throttle stuff i've done so far.
Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
redhardsupra, can you email me your bin file so i can see what you did? you have my email i think but here it is again, budchevy358@yahoo.com. ive also started on that idle write up you asked for a while back if you needed it still, took a while but i told you i woudl do it haha
I can post a screen shot tomorrow (tunes at work with my laptop there!). How do I post a SS anyway?
As far as the KR question, have you logged it with FTC to see what cell your in?
As far as the KR question, have you logged it with FTC to see what cell your in?
Originally Posted by RedHardSupra
PMack, aren't you getting bad surging? i usually fix surges by removing timing from thes areas, so i'm confused how it works for you.
Originally Posted by P Mack
I have no surging. It's just when driving around a parking lot trying to hold my speed at 7mph at 1000 rpm in first sometimes it'll start chugging. If i give it gas or let off the gas at all it'll go away.