87 or 91 octane fuel for modded nytro?

[FxNytro2010]

I have cr10ek's, Full exhaust(headers+slip-on), Fuel Accelerator and K&N's. Should i still use 87 octane fuel or go with the 91? thanks.

 

[raginyamaha]

didnt do anything to engines compression just stick with the cheap stuff..

 

[linemech31]

if you advanced the timing you may want to consider higher octane.

 

[BADSLED]

Fuel accelerator is just additional fuel no timing. Stick with 87 octane!

 

[mx1500]

why do guys with non turboed nytros run CR10EK'S. by dealer told me not to, they just burn colder

 

[revster]

I don't think that question can be answered without knowing the ethanol content of each grade is in your area.

At my local station the 87 contains 10-15% ethanol. The 91 contains 0%. So I run 91. My momma didn't raise no fool, a couple dollars at the pump to protect a $15,000 investment.

 

[raginyamaha]

I don't think that question can be answered without knowing the ethanol content of each grade is in your area.

At my local station the 87 contains 10-15% ethanol. The 91 contains 0%. So I run 91. My momma didn't raise no fool, a couple dollars at the pump to protect a $15,000 investment.

also a great point. ethanol sux

 

[Bahr05]

I buy 91 because there is no ethanol in it. If you can find 87 with no ethanol, have at'er! I have basically the same set up as you.

 

[09nytro]

why do guys with non turboed nytros run CR10EK'S. by dealer told me not to, they just burn colder

Because you get 1 to 2 Hp with them....I don't run them

 

[Nytro40th]

I run those plugs and have so since 2008 with no issues

 

[mx1500]

but dont need to run them lol.

 

[Nytro40th]

lol but do

 

[mx1500]

but confused haha. recs supply wouldnt sell em to me because they said i dont need them haha. poor sales people

 

[DelgatyXTX]

but confused haha. recs supply wouldnt sell em to me because they said i dont need them haha. poor sales people

You don't NEED them, but they do help. You NEED CD10EKs like you NEED an aftermarket bumper. Stock works but aftermarket is better.

I ran my sled this weekend with 91, but when I pulled up to the pump they had just run out and I had to use regular. Didn't notice the sled running any different at all.

 

[hopewell64]

elevation also plays a role on your octane requirements at higher elevations a high octane fuel does nothing for you, it may even cause a loss of performance. but gotta agree about the ethanol problem, i also use high octane plus race fuel. but i run boost.