Leaded race fuel?
09-09-2009, 07:37 PM
#26
Oh yeah, I'm sure there is. I just have to drive 30 miles round trip to get the 110 Leaded @ $5.56/gal., it's just not the direction I normally travel. I found it by accident cruising last weekend in the TA.
I used to buy 15% nitro r/c fuel online but the hazmat shipping today really ups the price.
I used to buy 15% nitro r/c fuel online but the hazmat shipping today really ups the price.
09-10-2009, 12:43 AM
#29
yes lead will poision the 02's
We'll use the inverse Nike saying. Just don't do it.
I can tell you right now that the LNF will hurt itself it you start adding timing beyond the factory settings below 2500 rpm.
"More torque More HP" has mentioned this to me numerous times.
I am a GM engineer and my opinions are my own.
We'll use the inverse Nike saying. Just don't do it.
I can tell you right now that the LNF will hurt itself it you start adding timing beyond the factory settings below 2500 rpm.
"More torque More HP" has mentioned this to me numerous times.
I am a GM engineer and my opinions are my own.
09-10-2009, 01:02 PM
#30
Thanks for the feedback on the lead. The timing issue isn't adding more below 2500 rpm, it's seeing KR 3-4* >5k on the same tune others are running in a different region of the country, similar temps. Trying to rule out fuel or an anomaly with my LNF.
09-10-2009, 01:18 PM
#31
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Come about 3 hours west and get some gas out here! IDK man... I'm not sure what it could be now. I am running 18* on .85 lambda. Now... you switched ECU's didn't you? Is the the stock one, or the backup? Wonder if its something not meshing between the car and ECU... its far fetched, but it could happen.
09-12-2009, 10:06 PM
#33
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get a better tune
if that fails, try 100 octane unleaded
there are a few other options to resort to prior to trying leaded gas
a better tune comes to mind first
if that fails, try 100 octane unleaded
there are a few other options to resort to prior to trying leaded gas
a better tune comes to mind first
09-13-2009, 12:07 AM
#34
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yeah theirs a speedway by me that has unleaded 100 oct i thought it said cam2 but isnt that leaded but if it is unleaded it shoudnt harm anything like the plugs or o2's right figured id try it once and see if theirs any gain if not ill just stick with the 93 vpower ive always used
09-13-2009, 10:34 AM
#37
The top of every gear beyond first above 5k rpm > 180% load or so. Don't know about 1st, it's gone too fast when I get on it even with 40% torque limit, it's smoke on command. I never tried logging 1st.
We're talking 3 - 4* of Knock retard, no audiable knock.
Edit: From Wikipedia...
Leaded gasoline contaminates the oxygen sensors and catalytic converters. Most oxygen sensors are rated for some service life in the presence of leaded gasoline but sensor life will be shortened to as little as 15,000 miles depending on the lead concentration. Lead-damaged sensors typically have their tips discolored light rusty.
No cat to worry 'bout...Hmmmmm.
We're talking 3 - 4* of Knock retard, no audiable knock.
Edit: From Wikipedia...
Leaded gasoline contaminates the oxygen sensors and catalytic converters. Most oxygen sensors are rated for some service life in the presence of leaded gasoline but sensor life will be shortened to as little as 15,000 miles depending on the lead concentration. Lead-damaged sensors typically have their tips discolored light rusty.
No cat to worry 'bout...Hmmmmm.
09-13-2009, 08:57 PM
#38
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If there's still knock, it's the tune. Although, there may be some other cause for knock. Some LSJ's had the downpipe come real close to the steering rack and under heavy load, the knock came on, as little as 1-2* even or as high as 13-15*. Then again, burst knock and tip in knock. Usually, it's the tune.
09-13-2009, 09:03 PM
#39
I was trying to watch it today while doing a pull, hard to do & keep my eyes on the road at 90, but none the less, it looks like it's burst knock, but the logs show the KR continuous once it starts. Watching the meters on the dashboard display, 3* of KR come & go. I do get a heavy vibration at times under load, so it may be sympathetic. I'll figure it out given enough time. The DP clears everything, I've been under & over it looking for anything that can vibrate.
Thanks for the input.
Thanks for the input.
Last edited by Iam Broke; 09-13-2009 at 09:04 PM. Reason: Automerged Doublepost
09-14-2009, 11:03 AM
#43
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If there's still knock, it's the tune. Although, there may be some other cause for knock. Some LSJ's had the downpipe come real close to the steering rack and under heavy load, the knock came on, as little as 1-2* even or as high as 13-15*. Then again, burst knock and tip in knock. Usually, it's the tune.
Not the tune. He gets the same 3* of KR on 17* as 14* and it doesnt go away even running 12.6 A/F on his car.
Last edited by Terminator2; 09-14-2009 at 11:03 AM. Reason: Automerged Doublepost
09-14-2009, 11:04 AM
#44
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09-14-2009, 11:08 AM
#45
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He is getting 3* of knock retard on 17* of timing and also on 14* of timing so basically even if he pulls timing and richens it up it still knocks. It is not the tune it is either false knock or some issue with his car or the fuel in his area because he is running what is supposed to be 93 octane but he is getting more KR than others on 91 octane with the same timing tables.
09-14-2009, 11:18 AM
#46
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with the larger heater core of the LNF's factory hi-res 02's it'll deal with the lead better, and it'll burn it off quicker once hes done.
the larger core'd unit i've been running in my lsj deals with lead just fine. I've pop'ed the slow response code many a time, only to burn a half tank of regular in it and it goes away.
any who, this issue sounds like something i saw a few years back with this motor. OP, what type and weight oil are you useing.
the larger core'd unit i've been running in my lsj deals with lead just fine. I've pop'ed the slow response code many a time, only to burn a half tank of regular in it and it goes away.
any who, this issue sounds like something i saw a few years back with this motor. OP, what type and weight oil are you useing.
09-14-2009, 11:23 AM
#47
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You missed the irony in my post......anyway, every car isn't the same. A tune for one won't always have the same results for others. They will be close but these cars are a PITA sometimes when it comes to tuning. Unless the LNF is vastly different from the others I'd suspect the tune needs to be tweaked or there is an external reason for the knock....something is hitting and making the sensor pick up knock. I had a SS/SC on the rollers and when we brought it up to speed, it made a sound that made the dyno operator shut it down early. We never heard that noise on the street either. come to find out, the downpipe was hitting the steering rack under engine load. We fixed that and the noise and kr went away.
09-14-2009, 11:33 AM
#48
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You missed the irony in my post......anyway, every car isn't the same. A tune for one won't always have the same results for others. They will be close but these cars are a PITA sometimes when it comes to tuning. Unless the LNF is vastly different from the others I'd suspect the tune needs to be tweaked or there is an external reason for the knock....something is hitting and making the sensor pick up knock. I had a SS/SC on the rollers and when we brought it up to speed, it made a sound that made the dyno operator shut it down early. We never heard that noise on the street either. come to find out, the downpipe was hitting the steering rack under engine load. We fixed that and the noise and kr went away.
I understand that they are all not the same but his is the only one I have seen that on 93 octane knocks 3* on 14* of peak timing and 12.8-12.9 A/F that is what strikes me as odd because they dont normally knock on 14* with 91 octane and the same A/F. I venture to say he would be knocking on 10* of peak advance.
Last edited by Terminator2; 09-14-2009 at 02:55 PM.
09-14-2009, 02:53 PM
#49
Well, ~9 gals of 93 octane and 5 gals of 110 leaded cured the knock.
One pull this morning saw 17* advance at the top of second and ZERO KR and ZERO Total KR.
Like I said... It's the EPA gas around the rust belt up here. Damn, and I work at the refinery. LOL.
93 octane my ass.
I'll flog it on the way home to be sure.
I've run Castrol Syntec 5w-30 in it since the first change at 1500 miles. 23K on it now.
One pull this morning saw 17* advance at the top of second and ZERO KR and ZERO Total KR.
Like I said... It's the EPA gas around the rust belt up here. Damn, and I work at the refinery. LOL.
93 octane my ass.
I'll flog it on the way home to be sure.
with the larger heater core of the LNF's factory hi-res 02's it'll deal with the lead better, and it'll burn it off quicker once hes done.
the larger core'd unit i've been running in my lsj deals with lead just fine. I've pop'ed the slow response code many a time, only to burn a half tank of regular in it and it goes away.
any who, this issue sounds like something i saw a few years back with this motor. OP, what type and weight oil are you useing.
the larger core'd unit i've been running in my lsj deals with lead just fine. I've pop'ed the slow response code many a time, only to burn a half tank of regular in it and it goes away.
any who, this issue sounds like something i saw a few years back with this motor. OP, what type and weight oil are you useing.
Last edited by Iam Broke; 09-14-2009 at 03:02 PM. Reason: Automerged Doublepost