Help with curing a bog off of idle

[Runner8]

Top rpm

YES! Blk/Orn are the ones that are breaking. Get the Yellow/White, tad lower engagement (maybe 100rpms) and same finish rate. Get a set of Thunder Products glide washers and install when you replace also. That will put the engagement up 100rpms with the 2 glide washers, they also give you 3 more washers to install in desired which will bump up engagement rpms 50rpms per washer.

Does the glide washers only affect the engagement rpms, and not top rpms?

 

[skimike]

87 octane could take care of the bog. 87 explodes faster and burns hotter giving you more up and go, 91 burns slower it just has a higher compression to detonation rate. with just a can you are loosing running anything higher than 87.

Think of it like a diesel, say diesel is 60 octane and blows up under compression only, and you get massive low end torque. AC built the compression rates of these motors to run on 87 for best performance and until you add power to increase the rate of compression you don't need 91.

nice analogy , smart post

 

[DalensM8]

I concur with WyoBo1000, give the 87 octane a try. I had noticeable results with it in my 09 M8 than when I tried 90 octane. Cat recommends 87 and the sled runs better, and stronger with 87.

 

[ff92]

I hate to say it but appears to have been the can. Replaced with stock can and stutter went away. I read somewhere that with an aftermarket can the ecu senses a lean condition at idle and retards the timing, is this true?

 

[ff92]

I hate to say it but appears to have been the can. Replaced with stock can and stutter went away. I read somewhere that with an aftermarket can the ecu senses a lean condition at idle and retards the timing, is this true?

I've also installed an Orange/Black primary spring, I hope this one isn't defective like the Black/Orange.

 

[Shift_Fast]

87 octane could take care of the bog. 87 explodes faster and burns hotter giving you more up and go, 91 burns slower it just has a higher compression to detonation rate. with just a can you are loosing running anything higher than 87.

Think of it like a diesel, say diesel is 60 octane and blows up under compression only, and you get massive low end torque. AC built the compression rates of these motors to run on 87 for best performance and until you add power to increase the rate of compression you don't need 91.

EDIT:

Might want to check out this article before talking anymore about octane and burn time.

http://www.2strokeheads.com/tech-octane-detonation.htm