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post #1 of 11 (permalink) Old 08-26-2011, 04:24 PM Thread Starter
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Regular octane?

I brought my Tbird in for the initial 500 mile service. I was having problems starting it until I did the 12 minute drill to reset the ECU. Now it starts ok but I did ask the dealer about doing a Tors download (eventhough I have the stock pipes). They recommended not to do it. They asked if I was putting regular octane gas in the bike and I said that I was actually putting in premium. They said that with the most recent ECU downloads that I should use regular octane. I said what about the middle octane and they said no, don't even use that, use regular. Anybody doing that?
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post #2 of 11 (permalink) Old 08-26-2011, 04:43 PM
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Quote:
Originally Posted by sgl0226 View Post
I brought my Tbird in for the initial 500 mile service. I was having problems starting it until I did the 12 minute drill to reset the ECU. Now it starts ok but I did ask the dealer about doing a Tors download (eventhough I have the stock pipes). They recommended not to do it. They asked if I was putting regular octane gas in the bike and I said that I was actually putting in premium. They said that with the most recent ECU downloads that I should use regular octane. I said what about the middle octane and they said no, don't even use that, use regular. Anybody doing that?
The manual warns strongly against "lugging" the engine or causing it to knock. The standard recommendatin is 87 octane if memory serves, with the advice to use higher octane if knocking is occurring.

When I bought my bike the dealer told me to use premium because "Why risk it?" I started out with the 91 octane premium, then switched to 89 mid-grade and have used that without an issue ever since. No knocking. I have considered trying 87 octane but haven't yet.
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post #3 of 11 (permalink) Old 08-27-2011, 12:18 AM
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I have downloaded the TORS map myself even though I don't have the TORS pipes. I have ridden the bike for a week now since I did it. The difference is like night and day! Before I had trouble starting from hot and it would not idle, now you can even blip the throttle at idle something you could never do before. It also runs so much smoother low down.
I have used 87 since I bought the bike with no issues but I need to fill it tomorrow for the first time since the map swap. I will use 91 now I have the new map just in case as the TORS map has a different ign curve.
By the way before the low fuel light used to come on at about 95k to go, with the new map it comes on with 65k to go.
Hope this helps!
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post #4 of 11 (permalink) Old 08-27-2011, 12:49 AM
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fact: ask 10 dealers the same question and you'll get 10 different answers.

fact: if the dealer doesn't know the correct answer he will give you one anyways in order not to seem clueless.

Fact: most dealers and thier mechanics today are pathetically unskilled.

deduction: there can only be one right answer in most cases, therefore the fact that dealers grasp at any answer that works for them and all come up with different ones prove they are no better informed than members here. If anything LESS informed because people here research things and get all the answers and eventually come to the correct conclusion. Dealers never delve deeply into 95% of details like this.

Rule #1 : Take everything the dealer tells you with a grain of salt. I'm not going to tell dealer stories because i don't have that much time. But with all due respect, even considering anything they tell you as gospel or remotely close is naive at best.

That said, get tuneecu and the cable. Total cost, about $10-20. Then download the tors map and load it yourself. Triumph does NOT want dealers to tell you certain things due to any number of agendas, most of which are NOT for your own good. The tors map will make your bike run better. It won't hurt a thing. I ran it with and without tors. It cured issues i had with the bike and made it run better.
As to fuel, a number of members including myself found the bike runs better on mid grade 89 octane. Mine actually ran so much better there was a very noticeable power increase to the point that when i tried going back to regular when the prices soared i felt like the bike lost so much response i was bummed. This is odd because usually higher octane should cause the bike to run weaker if anything, and in other bikes where i tried it, it never gave me a power increase. And like i said, other found the same thing. I don't get it, but it's real. I first tried it as a 1600, so it's not about the BB kit which i now have with the same results.
If you want my recommendation, i say get the short tors and the tors map, a uni filter, and start running mid grade. You will have a new bike that makes your current one seem like a weakling.
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post #5 of 11 (permalink) Old 08-27-2011, 04:52 PM
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dazco makes some great points. Also steve-tech thanks for your reply as well. I've been wanting to try the tors tune to see if it solves my hot start issues, and you are yet another person stating that it does. I've got to get the cable ordered, and load it myself soon. As for octane I had issues on 87. When I would accelerate hard the bike would cut out, and I would have to let off the throttle. I don't know how to explain it better than that. It was really annoying. I've been running 91 octane, and it runs very well on it. I may try cutting back to 89, and see how that goes.

Last edited by Lantesh; 08-27-2011 at 09:51 PM. Reason: typo
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post #6 of 11 (permalink) Old 08-27-2011, 05:16 PM
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The Triumph factory specifies minimum 91 RON (87 RON/MON) Fuel up to E25 for those models with production silencers or with aftermarket (TORS) accessory silencers. Triumph motorcycles do not have an OEM anti-knock sensor (cf. BMW K1300), hence I would be very reticent to run lower grade fuels in what is after all a performance machine with a compression ratio of 9.7:1.


Last edited by DeanRider; 08-27-2011 at 06:11 PM.
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post #7 of 11 (permalink) Old 08-27-2011, 06:03 PM
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I have about 6,000 miles on my stock 1700, have always run regular (85 RON/MON here in Colorado) with no pinging or other issues.
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post #8 of 11 (permalink) Old 08-27-2011, 06:13 PM
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Originally Posted by Spider View Post
I have about 6,000 miles on my stock 1700, have always run regular (85 RON/MON here in Colorado) with no pinging or other issues.
Is there a reason why you cannot use the factory specified 87 RON/MON fuels? Are they not available in your locality?

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post #9 of 11 (permalink) Old 08-28-2011, 12:01 PM
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Originally Posted by teologie View Post
Is there a reason why you cannot use the factory specified 87 RON/MON fuels? Are they not available in your locality?

At high altitudes (1 mile/1.6 km above sea level) less octane is needed because the air is less dense (standard air pressure is 12.1 psi versus 14.7 psi at sea level), net result is as if the engine had a lower compression ratio. So regular gas is 85 RON/MON. 87 is premium. I run 87 when I'm (rarely) in the lowlands.

Last edited by Spider; 08-28-2011 at 12:12 PM.
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post #10 of 11 (permalink) Old 08-28-2011, 12:34 PM
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The same fuel applies here on the South African Highveld, e.g., Johannesburg which is situated at an elevation of 1,753 metres (5,751 ft) above sea level. The problem of course is the loss in engine power, the calculation being for every 1000 feet you climb above sea level, there is a reduction in air density of approximately 4.5 percent. So, for every 1000-foot gain in altitude, there is a corresponding loss of horsepower.

In this regard, here is a helpful Braking HP Loss at Altitude Calculator: http://www.wallaceracing.com/braking-hp.php

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