Octane for 450

[dakota4ce]

Owners manual says minimum octane for the 450 is 91. What if you are boating in the middle of nowhere and the only available fuel is 89?

What is your method for dealing with this?


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[larry_arizona]

Straight out of Indmar Manual

https://uploads.tapatalk-cdn.com/20190726/a8c4e3dd5d3db19de7b2c45882031c91.jpg

Unless you are at high elevation I would not run 89 unless you had 50% 93 in the tank.


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[dakota4ce]

Hence the reason for me asking. [emoji2373]


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[larry_arizona]

Hence the reason for me asking. [emoji2373]


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Are you currently out of gas? Put a couple gallons of 89 to get you to the dock and then fill up with 93.


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[dakota4ce]

No man. The boat is going to live out in the middle of the state where they don’t have regular access to premium gas.


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[larry_arizona]

No man. The boat is going to live out in the middle of the state where they don’t have regular access to premium gas.


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What elevation are you at?



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[dakota4ce]

1600’


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[dakota4ce]

After a little research it is looking like Lucas oil octane boost might be a good way to go in a very cost-effective manner.


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[larry_arizona]

After a little research it is looking like Lucas oil octane boost might be a good way to go in a very cost-effective manner.


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There are formulas out there where you can buy toluene and Xylene from paint supply stores in bulk and make your own octane booster.

I also know you can use MTBE.

Just be very diligent in understanding the amount of octane you get from boosters.

Each point is 0.1 octane. You need a minimum of 30 points of octane to make 89 into 91.

You could also mix in unleaded race gas like VP C10. Order it in 5 gallon cans. It’s 100 octane.


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[larry_arizona]

EDIT: you need 20 points or 2 numbers to make 89 into 91. However, I would error on the side of caution and go 30 points. Even at 91 you are leaving a little power on the table. Ideally you want 93.

Lucas Oil 10026-PK12 Octane Booster - 15 oz (Pack of 12) https://www.amazon.com/dp/B001OZL9OQ/ref=cm_sw_r_cp_api_i_drUoDbGBYRZDD

Your Makai holds 60 gallons, looks like you would need 36oz of Lucas octane booster or 2.4 bottles.

Another option:
http://www.klotzlube.com/techsheets/KL-602.pdf

1oz per gallon gives you 25 points or 2.5 octane boost. 60 oz per fill up


Bonus on the klotz is it’s also a fuel stabilizer.


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[larry_arizona]

Another option

Torco F500010TE Unleaded Fuel Accelerator https://www.amazon.com/dp/B003TQ5QZQ/ref=cm_sw_r_cp_api_i_dXUoDb97C3A3F

48 oz per 60 gallons will make 89 into 91.

BOOSTane is another option and they make a marine formula.


One negative to most of these boosting products is it turn your plugs and O2 sensors orange. I don’t think it hurts anything but when I used Torco and my plugs turned orange, it was impossible to read the plugs.

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[Prospersigman]

What about 2 of these, fill them with 93 and bring them full with you each time?

https://www.amazon.com/SUNCOO-Gallon-Portable-Storage-Gasoline/dp/B07D9J8XD5/ref=sr_1_10?keywords=portable+fuel+tank+with+pump&qid=1564144940&s=gateway&sr=8-10

[larry_arizona]

https://www.transferflow.com/shop/refueling-transfer-tanks


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[dakota4ce]

I actually talked to guys at the motor manufacturer who said that the knock sensors will really prevent any engine damage very quickly by pulling back the timing—but the motor obviously will suffer in terms of performance on 89 octane. But wrecking the motor is not so much of a chief concern; and they did say as long as you could find some data supporting the effect of an octane booster that would be fine to use (like Lucas has—real data).


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[larry_arizona]

If tune is set up for 93 octane and you drop into the low octane tables with knock sensors alarming, it will drop 3-5 degrees and 20-30hp


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[dakota4ce]

If tune is set up for 93 octane and you drop into the low octane tables with knock sensors alarming, it will drop 3-5 degrees and 20-30hp


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It’s set up for 91 to 93.


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[dakota4ce]

And the Lucas oil product is legit. We will run with that if we use 89.


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[jcarter20]

So here is the age old question. Do you gain anything by running higher octane in the 400 motor? Or is it just a waste of money. I was running 93 in an older boat that I had and a mechanic told me the motor was programmed and tuned for 89 and running 93 was a waste of money. I just run 89 in my new motor, unless we fill up at the marina, which only has 91. I really don’t see any difference.


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[MLA]

So here is the age old question. Do you gain anything by running higher octane in the 400 motor? Or is it just a waste of money. I was running 93 in an older boat that I had and a mechanic told me the motor was programmed and tuned for 89 and running 93 was a waste of money. I just run 89 in my new motor, unless we fill up at the marina, which only has 91. I really don’t see any difference.


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There is not performance gain in running a higher then necessary octane, only a detriment in running a lower then recommended.

[larry_arizona]

^^^^This.

I wish Indmar didn’t lock the PCM’s on the raptors. You could definitely take advantage of 93 octane on the 400 if you could add timing.


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[sandm]

the only difference in the 400 and 450 is tuning. has to be a lot of performance left on the table to pick up that kind of gain with no change in fuel requirements or parts. too bad the ecu is locked down.
in the automotive world someone would have already figured out how to crack it but not enough demand in the boat world.

[larry_arizona]

I think the 400 and 440 are identical except for tune.

The interesting thing is the 440 gains 48hp and 23 ft.lbs over the 400 both on 89 octane. This tells me the 400 is tuned extremely conservative and longevity must be insane on such a mild tune.

The 450/460 might have a different cam selection plus the 93 octane tuning. But at 12hp and 25 ftlbs greater than the 440, that is not hard to gain tuning for 93 octane.

400: 350hp/404tq 89 octane tune
440: 398hp/427tq 89 octane tune
460: 410hp/452tq 93 octane tune


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[trace]

Wow, an octane booster thread that's not loaded with the usual "just run 93 in it" comments.
"Supposedly" the Boostane booster doesn't settle out after sitting some unspecified time in the tank. There has been some discussion about some octane boosters settling out over time and therefore being a poor choice for boats, that can go unused for a week easily. Torco is suspected to be one such that settles out. I have no idea if the Lucas Oil one does or not. I do know that Boostane has been tested against race fuels by tuning schools and run in Hellcats on race days, etc... the videos are all over youtube and easily found.

[larry_arizona]

Good point on phase separation, once you start the boat, wiggle the boat side to side to shake it up.


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[Prospersigman]

So if you were going to go with the BOOSTane would you go with the Marine version or the Premium Automotive version? We have a week coming up on Broken Bow lake in Oklahoma and the marina only sells 89 octane. I have to pull the boat out of the slip and trailer it up to the gas station just to fill up with 91 octane. It would be a lot easier to just run the marina gas and treat with BOOSTane just need to know which one to use as I am new to octane boosters. Also how much would you add to treat 73 gallons of gasoline?

[trace]

So if you were going to go with the BOOSTane would you go with the Marine version or the Premium Automotive version? We have a week coming up on Broken Bow lake in Oklahoma and the marina only sells 89 octane. I have to pull the boat out of the slip and trailer it up to the gas station just to fill up with 91 octane. It would be a lot easier to just run the marina gas and treat with BOOSTane just need to know which one to use as I am new to octane boosters. Also how much would you add to treat 73 gallons of gasoline?

Mixing chart here. https://boostane.com/about-boostane/boostane-mixing-chart/

Using Marine or Professional: Starting with 89 and trying to end up with 93 would be using the .26 ounce per gallon line, or ~19 ounces for 73 gallons. Trying to end up with 91 would use the .13 ounce per gallon line, or ~9.5 ounces for 73 gallon.

[Prospersigman]

They also have a Boostane app that auto calculates how much you need to add, how much the total cost is including the lower octane fuel you are adding this to.

To treat 72 gallons from 89 octane to 93 octane would be .58 of a bottle which can be purchased for $30.00 on Amazon prime.

I am going to get 2 bottles and give it a shot and see how it goes.