10-30-2021, 01:50 PM | #1 |
Registered User
Join Date: Dec 2012
Location: Temple City
Posts: 3,602
|
Octane boosters
Do any octane boosters work enough to get up from california piss water 91 to a decent 93. I have tried all brands of gas to only slight differences.
I finally finished tuning my engine as best I could and have talked to a few experts. My combined mechanical/dynamic compression is to high. So I want to try better octane booster then parts store stuff which helps, but I do not know a good brand. Or if any truly work. Besides around the margins. If I can hold out long enough to get things in order I want a LS variant. Or if no temp solutions will work I will do a LT1 350 as it will be plug, and play. Plus I know carbs where fuel injection can throw me a loop I would get stuck on. This is my only vehicle so I have to play it as safe as I can. |
10-30-2021, 02:47 PM | #2 |
Registered User
Join Date: Jan 2013
Location: Eastern TN
Posts: 1,921
|
Re: Octane boosters
Do you have E85 around? When I would get a bad tank of fuel I would spike it with E85. It has a higher octane rating but less BTUs per gallon.
|
10-30-2021, 02:57 PM | #3 |
Senior Member
Join Date: Dec 2009
Location: TN.
Posts: 8,213
|
Re: Octane boosters
__________________
________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
10-30-2021, 04:20 PM | #4 | |
Registered User
Join Date: Dec 2012
Location: Temple City
Posts: 3,602
|
Re: Octane boosters
Quote:
I have dreamed of building a E85 engine, but not for a DD where I live. Plus if I went to visit family I would have to bring enough fuel to finish the return trip. If worse comes to worse. I rather build a throw away 350. It would be emotionally easier to deal with. As at 430 am I need gas I can stop anywhere vs a special trip in the wrong direction to work. I have access to a 283 that needs a regasket, and manifold. That I could make work if need be. |
|
10-30-2021, 04:24 PM | #5 | |
Registered User
Join Date: Dec 2012
Location: Temple City
Posts: 3,602
|
Re: Octane boosters
Quote:
But I will look to see if I can get a bottle to try first. |
|
10-31-2021, 08:10 PM | #6 |
Registered User
Join Date: May 2013
Location: Post Falls, ID
Posts: 896
|
Re: Octane boosters
Just FYI "Raises octane level one point" means it raises it from 91 to 91.1, not 92.
Maybe you already knew that, but I thought it was worth mentioning. VP Octane booster will boost up to 70 points (advertised) You can also cut cheap gas with 101 aviation fuel, that works pretty good.
__________________
Insert clever text here: Last edited by Greasey Harley; 10-31-2021 at 08:16 PM. |
10-31-2021, 08:24 PM | #7 | |
Registered User
Join Date: Dec 2012
Location: Temple City
Posts: 3,602
|
Re: Octane boosters
Quote:
Some stuff I got will give me a several point increase. So I have to do the math when I get the formulas to see how I want to approach it. Or atleast people on the internet claim it is good, and I could have it delivered. I forgot about AV gas, and that is a option. Since I pass by a air port often enough. Plus with a lower compression motor already found. I can play with that for a month or two while I get ready for a swap out. |
|
11-01-2021, 11:18 AM | #8 |
Registered User
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,794
|
Re: Octane boosters
Av gas has lead in it . So watch cats and o2 sensors .
Plug there not suppose to sell to non airplane . . Faa rules atleast in my area .
__________________
77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great. |
11-01-2021, 02:05 PM | #9 | |
Senior Member
Join Date: Sep 2014
Location: Wenatchee, Wa
Posts: 916
|
Re: Octane boosters
Quote:
octane race fuel it was over $10.00 a gallon and not available everywhere. |
|
11-01-2021, 03:06 PM | #10 |
Registered User
Join Date: Aug 2020
Location: Salmon Arm BC
Posts: 192
|
Re: Octane boosters
Back in my high hp turbo Honda days we used to mix toluene in with pump for a little extra protection. This stuff: http://race-gas.com/ is supposed to work well as well.
__________________
1970 C10 l/b 292/4spd Build: http://67-72chevytrucks.com/vboard/s...d.php?t=811062 |
11-01-2021, 11:23 PM | #11 |
Senior Member
Join Date: Dec 2011
Location: Moraga, CA
Posts: 812
|
Re: Octane boosters
More than you'd ever care to learn about octane improving blending components:
https://www.nrel.gov/docs/fy00osti/28193.pdf Another fun option would be water injection. I haven't seen it promoted much lately. but theoretically should be helpful. EDIT: It looks like water injection systems have come a long way from when they just used to use a windshield washer pump: https://www.summitracing.com/search/...ection-systems Honda & MIT had a pretty cool SAE paper a few years ago. They'd get regulsr E10 gas and then split the base gasoline and ethanol with a special membrane. Then during high manifold pressure conditions, you'd have extra ethanol to inject. Not commercialized anywhere as far as I know.
__________________
(Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1 http://67-72chevytrucks.com/vboard/s...d.php?t=567340 |
11-22-2021, 06:49 PM | #12 |
Senior Member
Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,321
|
Re: Octane boosters
You can't get it anymore, but TetraEthylLead used to come in a 1 Qt bottle for a 20 gallon fuel tank. My '68 Stepside ran like it was the Sixties all over again.
__________________
Every 25 years I like to rebuild that 292, whether it needs it or not. |
Bookmarks |
|
|