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SSDiv6 · 01-12-2009, 03:26 PM

Some years ago, I challenged SFI on the 2 year requirement. I collected data from S/SS and Comp stick shift racers. Also, I took a Lakewood bellhousing, did extensive structural analysis and gave the data to NHRA.

After a telephone discussion with NHRA, they asked me to submit and talk to SFI. What a joke!!!
Spent 30 minutes with SFI's Arnie Kuhns and he could not come up with a single piece of factual or historical data on S/SS or Comp classes. The criteria SFI based their finding and requiremnt was from circle track and off-road racing vehicles for which they did not have a requirement for a SFI approved flywheel or clutch assembly in their rules. Many of these classes were still running OEM or Chinesium flywheels/clutches. Due to their failures, SFI applied the requirement as a general rule to all motorsports requirements.

NHRA has the authority to use the SFI requirements as a "Guideline" or "Suggestion" and extend the requirement as they deem appropriate for S/SS and Comp classes.

01-12-2009, 03:26 PM	#11
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 3,036 Likes: 711 Liked 1,538 Times in 575 Posts	Re: SFI Scattersheild meeting Some years ago, I challenged SFI on the 2 year requirement. I collected data from S/SS and Comp stick shift racers. Also, I took a Lakewood bellhousing, did extensive structural analysis and gave the data to NHRA. After a telephone discussion with NHRA, they asked me to submit and talk to SFI. What a joke!!! Spent 30 minutes with SFI's Arnie Kuhns and he could not come up with a single piece of factual or historical data on S/SS or Comp classes. The criteria SFI based their finding and requiremnt was from circle track and off-road racing vehicles for which they did not have a requirement for a SFI approved flywheel or clutch assembly in their rules. Many of these classes were still running OEM or Chinesium flywheels/clutches. Due to their failures, SFI applied the requirement as a general rule to all motorsports requirements. NHRA has the authority to use the SFI requirements as a "Guideline" or "Suggestion" and extend the requirement as they deem appropriate for S/SS and Comp classes.