Forum Navigation
You need to log in to create posts and topics.

Octane rating for the 477

12
Quote from Reddy on 14. September 2021, 14:47

With compression of 200 Whats The Fuel Octane rating You Recomend ?

we have 200 psi on the regular 477 - I have not measured the big head yet but great idea, will do next time I am in the shop.

Our bikes all run normal indian fuel, sometimes I purchase 2 of these small pouches with engine cleaner, they are cheap and seem to work. No knocking so far except in low gear uphil when the engine gets very stressed.

Officially this is from May 2021:

with the monumental challenge of switching to low-sulphur fuels during the transition to BS6, the oil industry had decided to stick to 91 octane.

but I also see this:

Indian Oil has introduced its XP95 branded high octane petrol. Indian Oil Corporation’s Chairman, Shrikant Madhav Vaidya, said, "From May 1, we will be launching XP95 and about 30 percent of Indian Oil retail outlets will be selling this."

so I guess we are running 91 most of the time.

 

oldphart has reacted to this post.
oldphart

I can say my personal experience with RON.

95 RON suffices for anything which doesn't ask you to revv. But just incase you do feel the urge to take the rpms towards the redlines in top gear, 99RON helps.

I normally choose to run on 95RON shell vpower + STP Racing Series octane booster. (7ml per litre of Petrol)

Or I just use HP power99 (99RON). The motorcycle feels best with this, but the wallet doesn't feel so good 🥲

sam2019 has reacted to this post.
sam2019

What about pump octane for the riders in the US? My RE manual definitely has conflicting info for the 411. But our octane rating system is different than just about everywhere else.

Dool has reacted to this post.
Dool

That is not the only thing Different to the rest of the world  😆

Quote from kabuku6 on 17. September 2021, 23:55

What about pump octane for the riders in the US? My RE manual definitely has conflicting info for the 411. But our octane rating system is different than just about everywhere else.

whatever it may be - it will always be better than often highly compromised Indian fuel. They add water (!!) and sometimes jet fuel (kerosine) to stretch it. So if the 411 and the 477 which have the same compression of 200psi run in India they probably run anywhere in the US.

Rather than a higher octane number which may not even be helpful in India at least it pays to add engine cleaner to the fuel which removes the black sodd that accumulates on top of the engine from "carbon additives" not meant to be in clean fuel. Given enough time these layers of sodd will highten the compression and can lead to knocking.

this is a good article to read for those who want to get deeper into the matter:

https://www.ncconsumer.org/news-articles-eg/high-octane-fuel-doesnt-always-equal-better-performance-or-better-gas-mileage.html

For the engine cleaner, BP advertise a fuel here that's supposed to clean your engine. Snake oil or is it doing the same thing?

https://www.youtube.com/channel/UCqZS7_4U_Qp-qdBoWtZVDww/videos
Quote from oldphart on 5. October 2021, 5:09

For the engine cleaner, BP advertise a fuel here that's supposed to clean your engine. Snake oil or is it doing the same thing?

if you read the article you would know the answer, it does the same - but adding it separately once a month is cheaper.

I like using 98Ron, it makes me feel special, but recently it has hit the 2 dollar mark 😥

So after all the performance testing is over I might work on my Low Compression design because 91 is always cheaper and it wont hurt to give the Bottom end a break. 😆

95 has now reached $2.50 a litre depending on the brand. Up $.70 a litre in 6 months. Another industry making big profits in a world crisis.

Dool has reacted to this post.
Dool
12