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Title: Koni Reds - rear end setup ? Post by: Shane Noone on October 25, 2011, 11:37:18 am Hey Guys,
I know there are so many variables that will ultimately affect rear end set up so there is no one definitive answer but hoped for some advice from anyone that has something similar and maybe through trial and error gives best all round launches at the drag strip....... What I have is an all steel 57 Oval,stripped of interior but has 6 point cro-moly cage tied to frame forks and shock towers.I have 28mm torsion bars and Heavy Duty spring plates and urethane bushes.Koni Red shocks are currently set to maximum but I have tried backing off too and can't seem to notice any real difference from a launch perspective ??? Tyre wise just started using MH DOT's and had no idea what pressure these should be run at.I started at stock pressure / 26 psi and had really bad tramp.Some guys at the track suggested this was due to excessive pressure and I should be running MH DOT's between 11- 15 psi max.I did lower the pressures to 18psi and coupled with a longer smokier burnout the tyres were sticky and I had no tramp - whether this was due to smoky burnout / sticky tyre or pressure drop or combination of both I have no idea. Any advice and thoughts from you guys that have proved what works at the track would be much appreciated. :) Thanks,Shane. Title: Re: Koni Reds - rear end setup ? Post by: BeetleBug on October 25, 2011, 12:26:01 pm You have a very similar set up as me:
- 28mm torsion bars - Heavy duty spring plates with urethane bushings - Red Koni`s - MH DOT 215/65-15 I had 5 starts this season between 1.42 to 1.47 60ft which I`m pleased with. My experience is that you need to drop the tire pressure in the MH down to 13 psi. You can start with 15psi and take it down from there. Below 13psi and they get a little wobbly. As soon as you got grip you can start increasing the pre-load in your Konis. Mine are 1 round away from max pressure. Mind you, I have not been above 132 mph. Best rgs BB Title: Re: Koni Reds - rear end setup ? Post by: Shane Noone on October 25, 2011, 14:41:35 pm You have a very similar set up as me: - 28mm torsion bars - Heavy duty spring plates with urethane bushings - Red Koni`s - MH DOT 215/65-15 I had 5 starts this season between 1.42 to 1.47 60ft which I`m pleased with. My experience is that you need to drop the tire pressure in the MH down to 13 psi. You can start with 15psi and take it down from there. Below 13psi and they get a little wobbly. As soon as you got grip you can start increasing the pre-load in your Konis. Mine are 1 round away from max pressure. Mind you, I have not been above 132 mph. Best rgs BB Thanks BeetleBug for that advice on your personal "on track" feedback. At the moment my 60 foot is 1.65 but hoping to get that down once I get used to the new car . Apart from maybe 4 or 5 passes made at the end of this season,no seat time so all a bit of a learning curve for me again. My current terminal is 106 mph but I anticipate that increasing up to around 120 with mid 11's N/A. |