11.2:1 on 92 octane
11.2:1 on 92 octane Everyone says it's cool, dont worry about it. I wasn't worried about it until I logged it and got KR at full throttle.
Too much timing....? 19 degrees
Not enough fuel...? narrow band reads mid 900's
PE table
1.237 1.24 1.245 1.288 1.297 1.323 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378
Whats the deal?
Am I running out of injector? Fuel filter?
I guess I'm just looking for directions... I can feel this thing pull timing...Im ready to dump a gallon of Xylene it .... or on it.
I can email scans or tunes to anyone willing to help.
thanks for reading
edit for mods and question... How do you log injector duty cycle? I dont see in my chart options menu for HPT. I only see pulse width and flow rate.
346 LS1
PP LS6 style heads 58cc
231/237 TSP cam 112 LSA
Kooks 1-7/8ths -X pipe-dumped
Too much timing....? 19 degrees
Not enough fuel...? narrow band reads mid 900's
PE table
1.237 1.24 1.245 1.288 1.297 1.323 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378
Whats the deal?
Am I running out of injector? Fuel filter?
I guess I'm just looking for directions... I can feel this thing pull timing...Im ready to dump a gallon of Xylene it .... or on it.
I can email scans or tunes to anyone willing to help.
thanks for reading
edit for mods and question... How do you log injector duty cycle? I dont see in my chart options menu for HPT. I only see pulse width and flow rate.
346 LS1
PP LS6 style heads 58cc
231/237 TSP cam 112 LSA
Kooks 1-7/8ths -X pipe-dumped
Last edited by VORTECFCAR; Apr 22, 2006 at 04:47 PM.
Originally Posted by VORTECFCAR
edit for mods and question... How do you log injector duty cycle? I dont see in my chart options menu for HPT. I only see pulse width and flow rate.
I'm trying to download version 2.1X right now, but the guy who sold me the cable didn't give me his password to login. So I just had his password sent to his account....dammit.
ARRRGGHH!!!
EDIT: doing some reading on HPT forums and came across a solid post by jimmyblue, I'm wondering if maybe my header extension pipe is hitting the floor and causing false KR....hmmm. If it's real detonation I should be able to hear it right? I just dont want to frag this motor.
ARRRGGHH!!!
EDIT: doing some reading on HPT forums and came across a solid post by jimmyblue, I'm wondering if maybe my header extension pipe is hitting the floor and causing false KR....hmmm. If it's real detonation I should be able to hear it right? I just dont want to frag this motor.
Last edited by VORTECFCAR; Apr 22, 2006 at 05:34 PM.
TECH Fanatic
Joined: Aug 2005
Posts: 1,691
Likes: 1
From: Sunny London, UK
Many things will pull timing, burst knock is notorious as is the shocking knock settings on earlier models such as your 98.
Check out the knock settings on a late model camaro. You might want to adjust BKR and Knock sensitivity.
Sometimes you might not hear knock, but usually you do.
Also look at the shape of the KR over time, if its ragged it shows sustained knock, which is bad. A little spike here and there might mean false knock.
You will have to experiment. Do a search for false knock and see what comes up.
Check out the knock settings on a late model camaro. You might want to adjust BKR and Knock sensitivity.
Sometimes you might not hear knock, but usually you do.
Also look at the shape of the KR over time, if its ragged it shows sustained knock, which is bad. A little spike here and there might mean false knock.
You will have to experiment. Do a search for false knock and see what comes up.
Originally Posted by VORTECFCAR
Everyone says it's cool, dont worry about it. I wasn't worried about it until I logged it and got KR at full throttle.
Too much timing....? 19 degrees
Not enough fuel...? narrow band reads mid 900's
PE table
1.237 1.24 1.245 1.288 1.297 1.323 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378
Whats the deal?
Am I running out of injector? Fuel filter?
I guess I'm just looking for directions... I can feel this thing pull timing...Im ready to dump a gallon of Xylene it .... or on it.
I can email scans or tunes to anyone willing to help.
thanks for reading
edit for mods and question... How do you log injector duty cycle? I dont see in my chart options menu for HPT. I only see pulse width and flow rate.
346 LS1
PP LS6 style heads 58cc
231/237 TSP cam 112 LSA
Kooks 1-7/8ths -X pipe-dumped
Too much timing....? 19 degrees
Not enough fuel...? narrow band reads mid 900's
PE table
1.237 1.24 1.245 1.288 1.297 1.323 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378 1.378
Whats the deal?
Am I running out of injector? Fuel filter?
I guess I'm just looking for directions... I can feel this thing pull timing...Im ready to dump a gallon of Xylene it .... or on it.
I can email scans or tunes to anyone willing to help.
thanks for reading
edit for mods and question... How do you log injector duty cycle? I dont see in my chart options menu for HPT. I only see pulse width and flow rate.
346 LS1
PP LS6 style heads 58cc
231/237 TSP cam 112 LSA
Kooks 1-7/8ths -X pipe-dumped
thanks for the suggestions guys, I went to the global KR vs. RPM vs. MAP table and set the whole thing to 4.0. PROBLEM SOLVED.
I have the timing set fairly conservatively at 25 degrees and have readjusted my PE table back to the mid 12's:1.
anyone having similar issues, I suggest getting premium fuel or adding some high octane unleaded and log a run. If you have modest timing and good fuel, it's probably false KR - fairly common with modded '98 cars.
I did a couple WOT runs after desensitizing the sensors and I didn't get any KR or audible pinging.
Any thoughts or comments?
I have the timing set fairly conservatively at 25 degrees and have readjusted my PE table back to the mid 12's:1.
anyone having similar issues, I suggest getting premium fuel or adding some high octane unleaded and log a run. If you have modest timing and good fuel, it's probably false KR - fairly common with modded '98 cars.
I did a couple WOT runs after desensitizing the sensors and I didn't get any KR or audible pinging.
Any thoughts or comments?
Last edited by VORTECFCAR; Apr 24, 2006 at 08:23 AM.
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thanks, hopefully I'll be able to log duty cycle soon and know for sure. Until then I'm just kind of taking it easy.
FWIW, I was getting KR as low as 3500 RPM - I think it's unlikely the stockers were out of fuel by then..?
have to get a racetronix setup and injectors in this thing next. $$$
FWIW, I was getting KR as low as 3500 RPM - I think it's unlikely the stockers were out of fuel by then..?
have to get a racetronix setup and injectors in this thing next. $$$
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Im running stockers right now, I'm thinking 42lb svo's should be plenty though - and maybe even enough for a small dry shot.
I went with the large primary headers and true duals because I got them for a good price used and wanted to be sure I had enough in case I ever went with more cubes or big juice. After a few days of tuning it's really running well.
Am I mistaken thinking that the 28.8lb injectors will feed this pig? I knew it would be close, I thought I'd be ok for a while. If HPT would buck up and help me out with version 2.X I could log my damn duty cycle and know for sure.
Is there any way I can manually convert pulse width to duty cycle... ? :goes to search:
I went with the large primary headers and true duals because I got them for a good price used and wanted to be sure I had enough in case I ever went with more cubes or big juice. After a few days of tuning it's really running well.
Am I mistaken thinking that the 28.8lb injectors will feed this pig? I knew it would be close, I thought I'd be ok for a while. If HPT would buck up and help me out with version 2.X I could log my damn duty cycle and know for sure.
Is there any way I can manually convert pulse width to duty cycle... ? :goes to search:
12 Second Club
iTrader: (10)
Joined: Sep 2005
Posts: 948
Likes: 0
From: From Ohio now in that state up north
If your not going lean then injectors isnt the problem even if your going over 100% duty cycle and you need new injectors if your not lean then then thats not causing knock. 98s are bad about the knock sensors picking up false knock getting 99+ knock sensors sometimes helps.
Originally Posted by 98redorangeta
If your not going lean then injectors isnt the problem even if your going over 100% duty cycle and you need new injectors if your not lean then then thats not causing knock. 98s are bad about the knock sensors picking up false knock getting 99+ knock sensors sometimes helps.
Originally Posted by VORTECFCAR
Im running stockers right now, I'm thinking 42lb svo's should be plenty though - and maybe even enough for a small dry shot.
I went with the large primary headers and true duals because I got them for a good price used and wanted to be sure I had enough in case I ever went with more cubes or big juice. After a few days of tuning it's really running well.
Originally Posted by VORTECFCAR
Am I mistaken thinking that the 28.8lb injectors will feed this pig? I knew it would be close, I thought I'd be ok for a while. If HPT would buck up and help me out with version 2.X I could log my damn duty cycle and know for sure.
Is there any way I can manually convert pulse width to duty cycle... ? :goes to search:
Is there any way I can manually convert pulse width to duty cycle... ? :goes to search:
go to stickies, and there's a thread (started by me) about injector pulse width/duty. new HPT has injector duty cycle as a custom pid, so you can just display it,as long as you got injector pulse width and rpm selected as well. or if you just wanna revisit some old logs, export them to excel, make an extra column, and have a formula =max(injpw1:injpw2)*rpm/120000 and format it as %. then somewhere else have a =max() function on the column you just created, and that will display your max duty cycle.
