Only hitting 7860 RPM?????

[Snowmaker10]

Did the new motor mounts fix your problem?

Didn't get a chance to get out this weekend. Ran it on a stand and seen 7900 so we will see. Have a speedwerx 170/310 secondary spring and a new spring seat to get rid of the shift assist. I also have a linderman mount in the mail.

 

[Thunder101]

Read through your posts again, 100 octane? What compression ratio and what elevation.

 

[Snowmaker10]

Yes 100 leaded and 15:1 8500ft and up. Was running the same setup (15:1 and 100 Leaded on 700cc) and was able to see 8200.

 

[Thunder101]

well if you think it feels strongest at 8200 with 700 jugs and stock pipe and then went to 800 jugs with all the same.
I guess your engine mounts and secondary clutch are where to look.

 

[Snowmaker10]

well if you think it feels strongest at 8200 with 700 jugs and stock pipe and then went to 800 jugs with all the same.
I guess your engine mounts and secondary clutch are where to look.

Cool! Thank you Thunder. I replaced the motor mounts and the have a linderman mount on the way. I also got the stuff to ditch the shift assist as well as a speedwerx 170/310 spring. (Fingers Crossed)!!!

 

[mbcat]

Cool! Thank you Thunder. I replaced the motor mounts and the have a linderman mount on the way. I also got the stuff to ditch the shift assist as well as a speedwerx 170/310 spring. (Fingers Crossed)!!!

My 06 700 loves 7850-7900, my f7 bigbore8 likes same with speedwerx 925 pipe. They are efi though. Try formula x-1 in secondary. Rips!!!

 

[Thunder101]

100% agree

 

[PJ06M7]

Is D&D saying 8200 with stock compression? If so, putting a 15:1 head on will push the RPM peak down. So 8200 may not be where it needs to run.

 

[Snowmaker10]

Is D&D saying 8200 with stock compression? If so, putting a 15:1 head on will push the RPM peak down. So 8200 may not be where it needs to run.

I could see that if I was riding at sea level but not at elevation. I did get out today and with 170/310 spring, no shift assist and new mounts I seen 7900. Gonna replace the secondary as there is some play in the bushing.