98TAauto

iTrader: (2)

Ive never really heard ping before, but doesnt it sound like the exhaust is coming loose/quarters rattling around in your headers? The car is fine at WOT, but then the converter locks up and the car goes in OD any slight throttle and I hear that sound. It really erks my nerves I can put a edit file in with less timing and it goes away, but the one with a little more and it starts up. Sometimes it does it bad, and others it doesnt.Thw weird thing is it doesnt start doing it mainly unless I have driven the car for over 20mins? weird?

any ideas? i take ping is from to much timing and not enough fuel?

but its only at slight throttle(under load) when the cars in OD
forgot to mention I have TEA stage 1.5 heads with 11:1CR and on 93 gas

Jpr5690

iTrader: (13)

seems to be the case but hell ud know better than me i had aproble like that a while back where only under slight accel would the car ping if it was 1500 rpm i pritty much knew it was timeing and when i did my borla and y pipe it seemed to solve it my guess was the release of back pressure caused the mix to richen up a bit form what you've said i wouls guess its a timming issue

98TAauto

iTrader: (2)

oh, speaking of backpressure. I duuno if its just from being loud, but when i open the cutout the sound goes away usually. But that may be cause I cant hear anything

i guess I could try backing the timing down 1 degree in the High octane sprark table lower rpms till it stops maybe? Anyone think that would help?

its not reallll bad, but you definitly can hear it. Like I said, sounds like somethings tinging around the headers almost when the car goes under slight load

NoGo

iTrader: (2)

Sergically pull timing at the points that it is dinging. It sounds like you are detonating when the engine is at low RPM under load (like 6th gear). This is a common problem for people who modify their entire High Octane table at once.

The portion of timing that you are going to want to mess with is in the lower left of the timing table. Try reducing timing for all points lower than 2200 rpm and greater than .52 g/cyl slowly and see if the problem goes away.

Good Luck,
Kevin

Jpr5690

iTrader: (13)

yep thats the prob cause by releasing the backpressure your richening it up allowing for more timeing so either run it more open or do what nogo said

98TAauto

iTrader: (2)

Kevin, so you're saying reduce the timing from .52 down to 1 g/cyl?

NoGo

iTrader: (2)

Yes.

Freeway driving, or low RPM / High Load conditions are usually less than 2200 RPM and somewhere in the .52 to .8 g/cyl range.

Reduce timing a couple degrees for all timing points less than 2200 RPM and .52 g/cyl to 1 g/cyl.

98TAauto

iTrader: (2)

Kevin, thanks alot buddie. Its worth a shot. Joe Overton tweaked the edit file and bought this beast alive. I think its just the summer heat and a little to much timing causing this. Ill put that file back in this fall.

but the reason I was asking is because I have 2 files. One pings and one doesnt. Both have the same timing in the .52 down to .1 cells(2200 less). The only thing changed on them was the timing up top of that table down to .52g/cyl. 2-3 degrees was added there while the .52 down to 1 wasnt touched(2200below)? Still think lowering those lower left cells will fix this? In guess when you edit a few cells it effects the whole table though.

lemme know what you think and if anything above makes sense LMAO

BLK02WS6

iTrader: (2)

HD,
Just a thought - Maybe since you have an A4 w/convertor, you may need to go a little further up the table than they are talking to cover it.

NoGo

iTrader: (2)

If the two timing tables are the same in the lower left portion, then you are going to have to calculate out your own g/cyl and see where the pigning is happening.

If you have monitoring software, you can log MAF (g/sec), RPM, Igntion Timing, KR.

You can calculate g/cyl with...

G/cyl = 15 * MAF (g/sec) / RPM


Get your car to ping again. Watch your KR. At the points that you generate KR calculate out g/sec and note the RPM. Look up the RPM and the g/sec on your high octane ignition table. This will give you a better idea of where you need to pull some timing.

Additionally, if you think it is caused by the hot air temperatures, you can pull some additional timing in the IAT / MAP table. Note the inlet air temp and the MAP that the pinging is happening at. Increase the amount of timing that is pulled at this point..... just another way to do it.

Good Luck

Jpr5690

iTrader: (13)

dam whish i had ls1 edit to do all the tweaking how much does it cost ???

Jpr5690

iTrader: (13)

dam whish i had ls1 edit to do all the tweaking how much does it cost ??? AND WHERE CAN I GET IT cheep?

Jpr5690

iTrader: (13)

o yea today i chan ged my settings with my hypertech and it started that noise again im guessing it learns it out after a couple of miles cause it seemed to go away after a while which is hwat happened last timed i changed something but good luck with the a\f thing

98TAauto

iTrader: (2)

damn, thanks for the info NoGo JNorris sent me a exel file with the format already so ill log the Maf(g) and figure this stuff out

thanks both of ya

98TAauto

iTrader: (2)

NOGO, lemme know your email addie also. I sent one but never got a reply?

I logged a quick cruise today and from 1500-2200 rpms I got ping/knock. From 1degree up to 7!!! No wonder I can hear it. Did the MAF in grams log and it seems im mostly in the .40-.55 cells when this happens. A few were in the .24-.3 cells, but mainly just .4-.6

so how much timing should I pull? Its mainly 4-6 degrees of knock untill I let off the gas. Its just part throttle cause as soon as I got WOT i get ZERO knock. I just cant have the car pinging when im cruising LMAO

below is the main cells
0.344
0.291
0.418
0.423
0.424
0.425
0.458
0.457
0.457
0.464732851
0.474167894
0.476053138
0.480504056
0.484778912
0.487248884
0.497643098
0.491574279
0.492183657
0.494313566

NoGo

iTrader: (2)

I stink at getting back on email timely. You just have too wait a couple days (30-40 emails a day....company junk)

Anyhoo. My rule of thumb is to pull 70% of the max amount of KR that you see. So, if you saw 7 KR, then I would pull 4 degrees of timing at that point. This usually does the trick.

Good Luck

98TAauto

iTrader: (2)

sounds good thanks alot man... i know you must be a busy guy

BTW, you and ol Joe Overton need to get together on tweakin those VE tables. He's the one that did mine. Only thing he touched was those and timing. Its just hard to tune blindfolded though and to get this crap perfect. Top end feels like a beast!

BADFNZ

iTrader: (19)

I have the exact same thing happening to me, quiet pinging under 2000 rpms when the converter is locked and a load is on the engine. If you find out how to fix it, let me know. I'll re-edit a few things to see if it works for me too.

98TAauto

iTrader: (2)

im still tweakin mine. Joe O messed with the VE table again, but im still getting some.... its tickin me off LMAO

im gonna pull some timing again in those cells and see

but its in the 1300-2100rpms still and under very slight throttle.

LS1Black: did you have your timing tables adjusted??

BADFNZ

iTrader: (19)

I only had my 50%+ throttle timing tables bumped to 29 degrees. Everything else was untouched. I might need to decrease timing on 25% or less throttle and see if that works. Or I might just switch to TR6's.