Kingpin Compliance Bushings.
Where to get them?Kingpin Compliance Bushings.
At my last setup - no more power at 8000+as long as the backpressure is low, and you got the cam+springs it should do 9000rpm. a y8 Works good at 8000
I read a lot posts here, but i had no problems with my 750cc so i think i will try and test them and maybe next year i can change and improveAh oke, I think HiProfile here can explain it the best.
we tried it, but not much more power at 8k or more. but i an try it with my next setup.You are still making over 300whp on that graph past 7500rpm. I bet you it still makes near 300whp at 8000rpm. The tuner just shut it down early because he was probably too scared to take it further. Besides keeping that car in gear longer will give you much better 1/4 mile times. I bet it will safely rev to 8500rpm, still make plenty of power and you'll drop atleast .2 sec in the quarter mile.
I've replaced them and the rear motor mount is a innovative mount - so i dont think that it's weak.Try replacing your halfshafts, bet they could be bent. That could be causing your issue. If you already haven't figured it out.
Also inspect the motor mounts, I'm sure the rear one is getting a lot of stress.