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Tuning / Diagnostics -- engine and transmission Tune and diagnostics for engines and auto transmission.

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Old 05-08-2010, 09:10 PM   #1
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Diablo canned tune sucks :(

I loaded the 93 tune in my ss and it felt like a night n day difference. I loved it. Then i realized my mistake and loaded he 91 octane tune because of the 91 in my area. Not as stout i must say. This SUCKS! Talking to ssmonte to rectify this. And whats wrong with using shell gas???
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Old 05-08-2010, 09:33 PM   #2
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Post comments when you hear! I was about to also load the 91 tune in my SS - The Trinity wouldn't power up in my car - only the PC. Then it smoked when it finally "tried" to power up in the car ;( Sad...getting a replacement...

I do know a dyno tune is the way to go - especially with aftermarket stuff like I have on...
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Old 05-08-2010, 10:13 PM   #3
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I'd say it would worth it to load the 93 tune and use octane booster with the 91 out here.
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Old 05-08-2010, 11:23 PM   #4
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i've been mixing 104 unleaded race fuel with local 91 octane fuel. 11:2 ratio creates a 93 octane blend.

i am in the works of testing my custom 93 octane tune with just 91 octane. will let people know tomorrow if WOT logs show any TKSR
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Old 05-09-2010, 06:21 AM   #5
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Cool, good info. I've done research and found that the lucas octane booster is able to increase 10gal. of 91 to 96.6 octane. I started running some last night along with some chevron gas. It seems to run nothing short of awesome. I will start data logging soon as well. Fyi, this was on the 93 tune.
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Old 05-09-2010, 07:30 AM   #6
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did you ever log the total knock spark retard? I bet you were getting a lot of KR with the shell... so that's why the chevron feels even better that that did... and the lucas stuff is raising your octane from 91 to about 94.6... so if you're going to use it all the time, then you'd be ok to run the diablo 93 tune in the car...


and like I replied to your PM... Shell gas is crap... causes a lot of KR... have seen it in every single log from people that used shell in their vehicles, and can tell when they've switched from a good gas to Shell too - cuz all of a sudden, there will be a bunch of KR in their data...

you want to use mobil, exxon, sunoco, amoco, bp, or chevron... those are good fuels that tend to yield the best results...

also... go back to stock/original for a few days.. then install the 91 tune... you'll notice a difference compared to stock... not as much as the diablo/93 tune, but there's still a difference.
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Old 05-09-2010, 11:11 AM   #7
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06' you definitely know your stuff man! yeah i did notice the difference with the 91 but after feeling hiw kuch more snappier the diablotune is, its honestly worth it to me. Maybe not others. I should change the thread title to 91 Sucks! Btw, thanks for all the insight man!
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Old 05-09-2010, 11:59 AM   #8
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Hey Monte, are you saying don't use shell gas if you have a tuned car or any car? I use shell as of now. I'm stock right now. Thx Bobby
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Old 05-09-2010, 01:30 PM   #9
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I've heard this from alot of tuners... I would stay away from Shell and Citco altogether

to the OP... thats a pretty harsh title, considering that you say the 93 octane tune was a night and day difference.
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Old 05-09-2010, 01:36 PM   #10
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I had great results with the Diablo 93 Tune. My local tuner didn't need to change a thing except turning off O2 codes when I put on LT's. I've always used Chevron 93...
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Old 05-09-2010, 06:38 PM   #11
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Waiting on something other than hearsay on the shell.
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Old 05-09-2010, 10:49 PM   #12
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not taking any chances on the shell. if you guys can trust 06monte to tune you, then you should listen. make sense?
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Old 05-10-2010, 07:56 AM   #13
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Waiting on something other than hearsay on the shell.
Yea, I run Shell in my Z06, and it's the most consistent gas I've ever gotten from a pump. Shell and Mobil are the only two I'll put in.
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Old 05-10-2010, 09:12 AM   #14
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of COURSE you do... As soon as I made my post, I fully expected you to say you use it... heh... but it's still crap gas... have seen a lot of knock retard CONSISTENTLY in data logs over and over and over.... so in that respect, yes, it is consistent...

here's just one of many many many many threads from others that had issues with shell gas... read here starting with this post:

http://www.ls1gto.com/forums/showthread.php?p=6794379

Last edited by 06MonteSS; 05-10-2010 at 09:50 AM.
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Old 05-10-2010, 09:58 AM   #15
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of COURSE you do... As soon as I made my post, I fully expected you to say you use it... heh... but it's still crap gas... have seen a lot of knock retard CONSISTENTLY in data logs over and over and over.... so in that respect, yes, it is consistent...

here's just one of many many many many threads from others that had issues with shell gas... read here starting with this post:

http://www.ls1gto.com/forums/showthread.php?p=6794379
I'm surprised you aren't talking about how it's impossible to pass readiness checks with no rear O2 sensors installed on a car.

I run lots of timing in my LS7 on Shell 93, and never get a trace of knock. Same deal with every other milled heads/huge cam LSx I do around here.
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Old 05-10-2010, 09:48 PM   #16
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Shell is the only place to get 93 near me
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Old 05-11-2010, 12:51 AM   #17
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I'm running Conoco out here in Colorado. 06MonteSS did my tune and he didn't mention any issue with KR. Only get 91 out here. Onl 1 station has 93 and it's a little mom n pop store. I'd have to ask where they get thiers from.
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Old 05-11-2010, 11:02 AM   #18
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When tuning we can tell if a customer is running Shell gas very easily. We recommend and use BP 93 in all of our stuff without any issues.
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Old 05-11-2010, 11:04 AM   #19
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It must vary from region to region, because in St. Louis, Shell has been the most consistent and least likely to ping.
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Old 05-11-2010, 01:58 PM   #20
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It must vary from region to region, because in St. Louis, Shell has been the most consistent and least likely to ping.
There is a Shell walking distance from our R&D facility here.

It is very common for customers to fill up there on their way to drop off a vehicle for Beta testing, and we have gotten really good at draining the tank as a result.

One of these cars was a 2007 Vette. Bone stock. Threw it on the dyno to baseline it, and the pull sounded terrible. Checked the log, tons of KR everywhere from the moment we went WOT.

Cooled it off, tried again, still knocking. Took it for a little spin up 95, drained most of the fresh Shell, and ran it over to the Mobil around the corner. 10 minutes later the car was up 20 rwhp (back to where it should have been), and it responded positively to more timing once we started tuning it.

Sure, it could be their tanks, or the local supply, but I always think it best to find a good brand locally, log the heck out of it, and never take for granted that it is 'good.'...
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Old 05-11-2010, 02:01 PM   #21
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Like I said, around St. Louis, Shell is the most forgiving as far as knock retard... Mobil is good too. Other places tend to end up knocking without changing anything else in the calibration.

The other problem is some stations of the same brand sell 91 at some locations, and 93 at others... yet people don't bother to check. There's all kinds of variability... but making a blanket statement that one brand sucks across the nation is extreme.
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Old 05-11-2010, 03:25 PM   #22
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no it's not... if it's bad in 95% of locations, why try to figure out exactly which 5% are ok and have to remember what state those good couple were in if you're ever driving through it... avoid 'em all, and you have no problems. there are better brands, better quality of gas around than shell, no matter where ya live...

it must be good just in your state then...

everyone else I've ever gotten data logs from, from all the other states they were in from around the U.S. (a LOT) - Shell gas was always, consistently, the cause of all their KR issues... once that crap was gone/out and replaced, everything was fine and back to normal...

and it's easy to tell when they've put in a tank of Shell during the tuning process as well... one time their data log will be fine, and then the next time, there will be a lot of KR in it... and I immediately know, and ask them, if they've put in Shell gas... and I get "holy shit, how'd you know that?!"... as FLP said above.. it's easy to tell when Shell is being used...
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Old 05-11-2010, 03:43 PM   #23
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Old 05-11-2010, 03:56 PM   #24
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Old 05-11-2010, 04:18 PM   #25
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Originally Posted by DSteck View Post
Like I said, around St. Louis, Shell is the most forgiving as far as knock retard... Mobil is good too. Other places tend to end up knocking without changing anything else in the calibration.

The other problem is some stations of the same brand sell 91 at some locations, and 93 at others... yet people don't bother to check. There's all kinds of variability... but making a blanket statement that one brand sucks across the nation is extreme.
Blanket statements like that are amazing. No problems with Shell around my part of the world either.

Would it be just as fair to say it must be the tune vs. the fuel? That would be just as fair wouldn't it?
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