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Octane booster question....... #1042301 07/28/11 08:18 PM 07/28/11 08:18 PM
Joined: Nov 2003 Posts: 624 Modesto CA B BFASTER OP mopar
BFASTER OP mopar B Joined: Nov 2003 Posts: 624 Modesto CA	......if I put 91 octane and octane booster in my tank, would it somehow make the motor run hotter? She ran a little hot last night for no apparent reason. I've been running Union 76 100 octane race gas, but had a bottle of O'Reilly Auto Parts brand booster in my garage that I wanted to try. Race gas is $7.79/gal here. Trying to save a little money. (please, no lectures) : Mild 440 street motor, normal aspiration. Last edited by BFASTER; 07/28/11 08:20 PM. 1969 Dodge Super Bee Hardtop 2007 Nissan Altima 3.5SE

Re: Octane booster question....... [Re: BFASTER] #1042302 07/28/11 08:26 PM 07/28/11 08:26 PM
Joined: Oct 2005 Posts: 4,946 WI Dcuda69 master
Dcuda69 master Joined: Oct 2005 Posts: 4,946 WI	I doubt the booster made it run hot. Exactly how "mild" is your 440 that you need race gas over pump 91??

Re: Octane booster question....... [Re: Dcuda69] #1042303 07/28/11 08:49 PM 07/28/11 08:49 PM
Joined: Nov 2003 Posts: 624 Modesto CA B BFASTER OP mopar
BFASTER OP mopar B Joined: Nov 2003 Posts: 624 Modesto CA	Quote: I doubt the booster made it run hot. Exactly how "mild" is your 440 that you need race gas over pump 91?? Don't NEED to....but it runs a helluva lot better than with anything else. Besides, 100 octane is really just "super Premium". (91 isn't what I would call Premium; used to be it was 93-94 octane) Engine has MP .484 cam, aluminum Stealth heads, .030 over, Eddy RPM intake, stock elec. ignition and an old holley 750. About 9:1 cr. 1969 Dodge Super Bee Hardtop 2007 Nissan Altima 3.5SE

Re: Octane booster question....... [Re: BFASTER] #1042304 07/28/11 09:00 PM 07/28/11 09:00 PM
Joined: Jul 2005 Posts: 1,499 Slidell, LA Plum440 pro stock
Plum440 pro stock Joined: Jul 2005 Posts: 1,499 Slidell, LA	....My freshly built 440 ran terrible with an octane booster ! Once I ditched it she ran perfect ! 70 Challenger, 440, 4-speed, pLuM cRaZy 71 VW Super Beetle Convertible, Lemon Yellow A couple of Jeeps…

Re: Octane booster question....... [Re: Plum440] #1042305 07/28/11 09:54 PM 07/28/11 09:54 PM
Joined: Nov 2003 Posts: 624 Modesto CA B BFASTER OP mopar
BFASTER OP mopar B Joined: Nov 2003 Posts: 624 Modesto CA	Quote: ....My freshly built 440 ran terrible with an octane booster ! Once I ditched it she ran perfect ! Me thinks I'll do the same! 1969 Dodge Super Bee Hardtop 2007 Nissan Altima 3.5SE

Re: Octane booster question....... [Re: BFASTER] #1042306 07/28/11 10:27 PM 07/28/11 10:27 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	heres what i use. no problems easy install and it works. Not only can you run 91-93 and as much advance as you like, it adds about 25-40HP http://www.snowperformance.net/product.php?pk=31 [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: Octane booster question....... [Re: BFASTER] #1042307 07/28/11 10:50 PM 07/28/11 10:50 PM
Joined: Oct 2005 Posts: 4,946 WI Dcuda69 master
Dcuda69 master Joined: Oct 2005 Posts: 4,946 WI	Quote: Quote: I doubt the booster made it run hot. Exactly how "mild" is your 440 that you need race gas over pump 91?? Don't NEED to....but it runs a helluva lot better than with anything else. Besides, 100 octane is really just "super Premium". (91 isn't what I would call Premium; used to be it was 93-94 octane) Engine has MP .484 cam, aluminum Stealth heads, .030 over, Eddy RPM intake, stock elec. ignition and an old holley 750. About 9:1 cr. OK...I fail to see how a alum. headed 9:1,484 cammed 440 runs "better" with 100 octane. But if it works for you..go for it! My 10.3:1 Eddy headed,solid roller 470" runs fine on 91 pump swill

Re: Octane booster question....... [Re: Dcuda69] #1042308 07/28/11 11:14 PM 07/28/11 11:14 PM
Joined: Nov 2003 Posts: 624 Modesto CA B BFASTER OP mopar
BFASTER OP mopar B Joined: Nov 2003 Posts: 624 Modesto CA	Quote: Quote: Quote: I doubt the booster made it run hot. Exactly how "mild" is your 440 that you need race gas over pump 91?? Don't NEED to....but it runs a helluva lot better than with anything else. Besides, 100 octane is really just "super Premium". (91 isn't what I would call Premium; used to be it was 93-94 octane) Engine has MP .484 cam, aluminum Stealth heads, .030 over, Eddy RPM intake, stock elec. ignition and an old holley 750. About 9:1 cr. OK...I fail to see how a alum. headed 9:1,484 cammed 440 runs "better" with 100 octane. But if it works for you..go for it! My 10.3:1 Eddy headed,solid roller 470" runs fine on 91 pump swill My 440 also runs fine with 91, never said it didn't. Seriously....do I need a "race" motor to benefit from running 100 octane? 1969 Dodge Super Bee Hardtop 2007 Nissan Altima 3.5SE

Re: Octane booster question....... [Re: BFASTER] #1042309 07/28/11 11:32 PM 07/28/11 11:32 PM
Joined: Oct 2005 Posts: 4,946 WI Dcuda69 master
Dcuda69 master Joined: Oct 2005 Posts: 4,946 WI	Quote: Quote: Quote: Quote: I doubt the booster made it run hot. Exactly how "mild" is your 440 that you need race gas over pump 91?? Don't NEED to....but it runs a helluva lot better than with anything else. Besides, 100 octane is really just "super Premium". (91 isn't what I would call Premium; used to be it was 93-94 octane) Engine has MP .484 cam, aluminum Stealth heads, .030 over, Eddy RPM intake, stock elec. ignition and an old holley 750. About 9:1 cr. OK...I fail to see how a alum. headed 9:1,484 cammed 440 runs "better" with 100 octane. But if it works for you..go for it! My 10.3:1 Eddy headed,solid roller 470" runs fine on 91 pump swill My 440 also runs fine with 91, never said it didn't. Seriously....do I need a "race" motor to benefit from running 100 octane? Theoretically....yes. The only benefit you would see would be lead, is the 100 octane leaded?? If not I would doubt you'll see a difference in a 9:1 motor. Again just my

Re: Octane booster question....... [Re: Dcuda69] #1042310 07/29/11 12:34 AM 07/29/11 12:34 AM
Joined: Aug 2003 Posts: 12,291 Kent, Wa 340SHORTY Truck Nut
340SHORTY Truck Nut Joined: Aug 2003 Posts: 12,291 Kent, Wa	octane booster pure bul- sh-t I am truckless..

Re: Octane booster question....... [Re: BFASTER] #1042311 07/29/11 02:09 AM 07/29/11 02:09 AM
Joined: May 2011 Posts: 340 Alaska 7 73rrak enthusiast
73rrak enthusiast 7 Joined: May 2011 Posts: 340 Alaska	I run a 3:1 premium 91 octane gas / race fuel mix in my 512 (11.3:1 compression stealth heads) Challenger. My car runs better with it but my 1/4 mile times went from 11 seconds to 11 minutes because I had to stop every 50 feet to get out and smell my exhaust....... God I love that smell. I was only kidding about the 1/4 mile times I have no idea what it runs in a 1/4

Re: Octane booster question....... [Re: 73rrak] #1042312 07/29/11 08:25 AM 07/29/11 08:25 AM
Joined: Dec 2004 Posts: 5,278 San Jose, California D DennisH Vacation
DennisH Vacation D Joined: Dec 2004 Posts: 5,278 San Jose, California	9.5:1 440. 91. When 100 is in it, it seems to get quieter. Or maybe it's phsycological. Wish I could get Sunoco 94 Ultra out here in green land.

Re: Octane booster question....... [Re: Dcuda69] #1042313 07/29/11 09:42 AM 07/29/11 09:42 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	"OK...I fail to see how a alum. headed 9:1,484 cammed 440 runs "better" with 100 octane. But if it works for you..go for it!" you know what's wierd. My 5.2 5 speed 95 dak sport w/ nothing more than a computer upgrade and headers ran much better on 104 (unleaded) mix w/ 93 than straight 93. The truck picked up a little over a tenth and It seemed to run smoother. I only did it because a buddy of mine suggested it. I was thinking it was over kill as well. Maybe because it was a hot day????

Re: Octane booster question....... [Re: Mr.Yuck] #1042314 07/29/11 09:51 AM 07/29/11 09:51 AM
Joined: Oct 2005 Posts: 4,946 WI Dcuda69 master
Dcuda69 master Joined: Oct 2005 Posts: 4,946 WI	Quote: "OK...I fail to see how a alum. headed 9:1,484 cammed 440 runs "better" with 100 octane. But if it works for you..go for it!" you know what's wierd. My 5.2 5 speed 95 dak sport w/ nothing more than a computer upgrade and headers ran much better on 104 (unleaded) mix w/ 93 than straight 93. The truck picked up a little over a tenth and It seemed to run smoother. I only did it because a buddy of mine suggested it. I was thinking it was over kill as well. Maybe because it was a hot day???? I might understand that. Your computer(esp upgrsded)may add timing till it recognizes spark knock from a knock sensor. The 440 in the OP does not have that ability.

Re: Octane booster question....... [Re: Dcuda69] #1042315 07/29/11 09:53 AM 07/29/11 09:53 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: Quote: "OK...I fail to see how a alum. headed 9:1,484 cammed 440 runs "better" with 100 octane. But if it works for you..go for it!" you know what's wierd. My 5.2 5 speed 95 dak sport w/ nothing more than a computer upgrade and headers ran much better on 104 (unleaded) mix w/ 93 than straight 93. The truck picked up a little over a tenth and It seemed to run smoother. I only did it because a buddy of mine suggested it. I was thinking it was over kill as well. Maybe because it was a hot day???? I might understand that. Your computer(esp upgrsded)may add timing till it recognizes spark knock from a knock sensor. The 440 in the OP does not have that ability. got ya... his should run fine on 93 even at 38* total.

Re: Octane booster question....... [Re: Mr.Yuck] #1042316 07/29/11 06:16 PM 07/29/11 06:16 PM
Joined: Jul 2007 Posts: 1,682 Philadelphia R radar top fuel
radar top fuel R Joined: Jul 2007 Posts: 1,682 Philadelphia	Octane is a measure of knock resistance. More octane will burn slower and not want to explode (knock). A higher octane will not produce more power. More powerful engines run the high test to match wild compression ratios, not because the gas has more bang in it. Run the lowest octane that doesn't knock with your preferred spark advance.

Re: Octane booster question....... [Re: radar] #1042317 07/29/11 07:42 PM 07/29/11 07:42 PM
Joined: Nov 2003 Posts: 624 Modesto CA B BFASTER OP mopar
BFASTER OP mopar B Joined: Nov 2003 Posts: 624 Modesto CA	Quote: Octane is a measure of knock resistance. More octane will burn slower and not want to explode (knock). A higher octane will not produce more power. More powerful engines run the high test to match wild compression ratios, not because the gas has more bang in it. Run the lowest octane that doesn't knock with your preferred spark advance. Thank you. A very sensible answer! 1969 Dodge Super Bee Hardtop 2007 Nissan Altima 3.5SE

Re: Octane booster question....... [Re: BFASTER] #1042318 07/29/11 09:43 PM 07/29/11 09:43 PM
Joined: Aug 2010 Posts: 1,525 Eastern shore, New England R roadrunner69s pro stock
roadrunner69s pro stock R Joined: Aug 2010 Posts: 1,525 Eastern shore, New England	My first GTX had a somewhat built engine though I never knew the exact specs. Maybe compression was between 10.1-10.5 to 1. It would ping at WOT on 93 octane and have a slight power lag at 1000-1400 rpm. Running a mix of Sunoco race gas to 93 octane boosted it to around 98-100. With that octane it had no pings, much improvement on the hesitation, and even ran a tad cooler. I tried various octane "boosters" and none did a darn thing regardless of what they claimed. I'd even add the bottles when the tank was getting low to maximize the effect. A waste of $$. It was actually cheaper back then to add 1-2 gallons of race gas than it was to add an octane booster. At least with the race gas you were getting a set qty of real octane. RR69s

Re: Octane booster question....... [Re: Mr.Yuck] #1042319 10/09/11 12:50 PM 10/09/11 12:50 PM
Joined: Sep 2006 Posts: 1,139 West Tennessee R rbstroker super stock
rbstroker super stock R Joined: Sep 2006 Posts: 1,139 West Tennessee	Quote: heres what i use. no problems easy install and it works. Not only can you run 91-93 and as much advance as you like, it adds about 25-40HP http://www.snowperformance.net/product.php?pk=31 I have heard of alcohol and/or water injection for years. I think that some aircraft used it in the 40's. Do you use it on the street or at the track? Any associated issues whatsoever?

Re: Octane booster question....... [Re: rbstroker] #1042320 10/09/11 03:50 PM 10/09/11 03:50 PM
Joined: Sep 2003 Posts: 1,168 Vancouver, WA MoparMarq super stock
MoparMarq super stock Joined: Sep 2003 Posts: 1,168 Vancouver, WA	Quote: I have heard of alcohol and/or water injection for years. I think that some aircraft used it in the 40's. Garrett used water-methanol injection in their TPE-331 turboprop engine mounted in a Fairchild Metroliner. 60% +/- 2% methanol, 40% +/- 2% water mixture. Increased shaft horsepower from 1000 to 1100 at sea level. The aircraft are still being used to this day at FedEx/UPS cargo feeder airlines.

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