1 Fast SS Posted August 26, 2007 Report Share Posted August 26, 2007 Anyone else running 100+ octane in their trucks? Are there pro's and con's? When I fuel up, I'll add 3-5 gallons when it's on a half tank, and I can really feel the difference. Anymore than 3-5 gal., then the truck doesn't run properly. Especially when going to the track. I'll only have a 1/4 tank in my truck when going there, and have the two mixed in already. I've got a custom tune on my truck, so I can do this. The truck feels much more torquey, and the throttle response is alot better too. I've tested it out on different tanks of gas, and it really does improve the performance. It allows you to run more timing in the truck. The guys with the custom tunes, give it a try. Or even the stock SS's, just put a couple of gallons in and see what happens. Quote Link to comment Share on other sites More sharing options...
wody Posted August 26, 2007 Report Share Posted August 26, 2007 (edited) and it smells good too i don't run it in the summer heat out here though. i wait till it cools down. Edited August 26, 2007 by WODY (see edit history) Quote Link to comment Share on other sites More sharing options...
firervfd37 Posted August 26, 2007 Report Share Posted August 26, 2007 So with my tune that is set up for premium gas only i can run 100 octane if i come across it and it wont mess the truck up? Quote Link to comment Share on other sites More sharing options...
Rausche Posted August 26, 2007 Report Share Posted August 26, 2007 I'm running 105 through on my next tank... Everything else I've put 100+ in loves it... We'll see how the SS does. Quote Link to comment Share on other sites More sharing options...
misterp Posted August 26, 2007 Report Share Posted August 26, 2007 Con - expensive, excess will destroy catalytic converters. Pro - if the timing in your tune is way too agressive the extra octane combats detonation. Assuming that your tune (timing) is correct the only way changing fuels helps is if the "additive" has more heat energy in it than regular pump gas, which is not hard to achieve these days unfortunately. Adding 3 gals of 100 octane to 6 gals 93 pump gas results in about 95.5 octane and that is the maximum a catalytic converter can tolerate under WOT. Mr. P. Quote Link to comment Share on other sites More sharing options...
gunslinger2803 Posted August 26, 2007 Report Share Posted August 26, 2007 i dont even know where to get 100+ octane gas where i live Quote Link to comment Share on other sites More sharing options...
1 Fast SS Posted August 26, 2007 Author Report Share Posted August 26, 2007 Con - expensive, excess will destroy catalytic converters.Pro - if the timing in your tune is way too agressive the extra octane combats detonation. Assuming that your tune (timing) is correct the only way changing fuels helps is if the "additive" has more heat energy in it than regular pump gas, which is not hard to achieve these days unfortunately. Adding 3 gals of 100 octane to 6 gals 93 pump gas results in about 95.5 octane and that is the maximum a catalytic converter can tolerate under WOT. Mr. P. Frank tuned my truck for this, so I trust what he tells me. That's why I don't put any more than 5 gal of it. Does this effect the cats after a long period of time, or does it effect it right a way? I'm not a daily driver, so I didn't think it would hurt it. And I don't know if this matters or not, but I have MSD 8.5 wires to get more spark for the upgrade. Do these help? Quote Link to comment Share on other sites More sharing options...
12'SROCK Posted August 26, 2007 Report Share Posted August 26, 2007 Con - expensive, excess will destroy catalytic converters.Pro - if the timing in your tune is way too agressive the extra octane combats detonation. Assuming that your tune (timing) is correct the only way changing fuels helps is if the "additive" has more heat energy in it than regular pump gas, which is not hard to achieve these days unfortunately. Adding 3 gals of 100 octane to 6 gals 93 pump gas results in about 95.5 octane and that is the maximum a catalytic converter can tolerate under WOT. Mr. P. if you are not runing aggressive timing you do not need the extra octane as your motor will run hotter because the higher the octane the slower it burns. IMHO so if your truck feels better with trhe 100 octane then your timing table is agressive and seems like your getting some knock therfore feels better with the higher octane. did frank do a dyno tune for you? Quote Link to comment Share on other sites More sharing options...
RacerJJ Posted August 26, 2007 Report Share Posted August 26, 2007 I run VP 110 leaded race gas only (sometimes C12). I don't have any cats so that's not a worry for me. My timing table is pretty aggressive so I need all the octane I can get. I mainly use it because of racing consistency. Quote Link to comment Share on other sites More sharing options...
usabodyguard Posted August 26, 2007 Report Share Posted August 26, 2007 i have, mistakenly, run 100 octane through every tank for the last 2-3 months... i put in about 8 gals and the rest 91... guess i wont be doing that anymore... now i need to figure out if my cats are clogged... is there an easy way of doing it? My cats are off right now due to my transmission removal... anyone? i just need to pony up and get some dynatech LT's... Quote Link to comment Share on other sites More sharing options...
1 Fast SS Posted August 26, 2007 Author Report Share Posted August 26, 2007 if you are not runing aggressive timing you do not need the extra octane as your motor will run hotter because the higher the octane the slower it burns. IMHO so if your truck feels better with trhe 100 octane then your timing table is agressive and seems like your getting some knock therfore feels better with the higher octane. did frank do a dyno tune for you? No knocking here, and he did a PCM tune. I guess he just started doing dyno tunes. Haven't talk to him in a while. Quote Link to comment Share on other sites More sharing options...
RacerJJ Posted August 26, 2007 Report Share Posted August 26, 2007 i have, mistakenly, run 100 octane through every tank for the last 2-3 months... i put in about 8 gals and the rest 91... guess i wont be doing that anymore... now i need to figure out if my cats are clogged... is there an easy way of doing it? My cats are off right now due to my transmission removal... anyone? i just need to pony up and get some dynatech LT's... Just gut em while there off! Quote Link to comment Share on other sites More sharing options...
Jond983 Posted August 26, 2007 Report Share Posted August 26, 2007 i dont even know where to get 100+ octane gas where i live Quote Link to comment Share on other sites More sharing options...
usabodyguard Posted August 26, 2007 Report Share Posted August 26, 2007 Just gut em while there off! how?? and will it f&ck up my engine in anyway?? I am getting some LT's soon btw... Quote Link to comment Share on other sites More sharing options...
Jond983 Posted August 26, 2007 Report Share Posted August 26, 2007 (edited) how?? and will it f&ck up my engine in anyway?? I am getting some LT's soon btw... i'd like to know this as well Edited August 26, 2007 by Jond983 (see edit history) Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.