Accel FAQ

You can download the Accel User's Manual here.

General Questions

Is the Accel Device Offered in Different Sizes?
The Impact Accel FHR is currently offered in two sizes. The Accel device fits most adults, typically a driver weighing 100 lbs or more. The Small device can be used with 2-inch belts, while the Standard size accepts 2-inch or 3-inch belts.

What is the Impact Accel Constructed From?
The Accel is made from a DuPont® carbon fiber composite material.

What is the Weight of the Impact Accel?
The standard device is manufactured from lightweight DuPont® materials and weighs only 1.8 lbs.

Do I Need Any Special Tools to Install the Impact Accel?
No, the Accel uses standard tools and we supply a tool kit with each device.

Will the Impact Accel Feature the Helmet Attachment Hardware?
Priced at only $599, the Impact Accel device includes the tether hardware and helmet clips. The Accel has everything you need to race safer!

Do I Need a Special Helmet to Work with the Accel Device or Will I Have to Drill My Helmet?
If you have a new SAH2010, SAH2015, or a pre-drilled helmet, it is ok to use the included mounting plates. Otherwise, easy-to-follow instructions for un-drilled and SA2010 helmets are included with the device.

Carrying Case - Do You Sell Cases for the Impact Accel?
The Impact Accel device also features a padded carrying case to protect your investment.


Impact Accel Feature Illustration

1. Quick Release Helmet Hardware: This is a unique two finger quick eject helmet attachment system.

2. Emergency Pull: Optional pull tag for quick disconnect.

3. Wings: Standard adult unit can accept 2” or 3” seat belts, where the Small unit only accommodates 2-inch belts. The wings aid in keeping your harness in place under impact. Even in multiple impact situations where the belts could loosen.

4. Flexible Bar: This allows for upper body movement and comfort while driving. Also allows user to flex the unit over larger necks.

5. Belt Guides: The guides keep the unit centered on the driver at all times, not allowing the unit to slip from under the belts.

6. Body Forming Pads: The body forming Kevlar® belts with Nomex® pads fit under the seat belt, therefore taking any pressure off the collar bone and making the unit very comfortable.

7. Adjustable Rear: The unit is adjustable to fit most seat angles from 10°-40°. This also allows the driver to adjust the back of the unit for comfort or interference with the helmet or the seat.

8. Low Rear: The low profile design allows easy access from confined areas with little interference on roll bars in dragsters and landspeed cars.

9. Tension Neutralizing Tether:Using a single self-neutralizing tether, the loads under impact are distributed through four different load paths. This unique system offers an equal distribution of forces under impact. This system also offers a full range of head motion and side and angular impact protection.


Safety and Testing

Has the Accel Passed Any Safety Standard Testing?
Yes - the Impact Accel device has passed the SFI Foundation’s 38.1 specification standard for Frontal Head Restraints.

What is SFI Testing?
The SFI Foundation, Inc. (SFI) is a non-profit organization established to issue and administer standards for specialty/performance automotive and racing equipment.

Is the Impact Accel FHR an Approved Device for My Sanctioning Body?
Most racing organizations in the USA that have recently mandated Frontal Head Restraints require an SFI approved device. The Impact Accel FHR is an SFI approved device.

Is the Impact Accel FHR an Approved Device for My Sanctioning Body?
Most racing organizations in the USA that have recently mandated Frontal Head Restraints require an SFI approved device. The Impact Accel FHR is an SFI approved device.


Comfort and Fit

Will I Be Able to Move My Head From Side to Side?
Yes, the Accel has self-aligning tethers that offer range of motion from left to right.

Will the Device Put Pressure on My Clavicle (Collar Bone)?
No, the Impact Accel has body forming pads, which go under the seat belt at the collarbone. There is no hard surface on your collar bone.

Will I Need to Buy Shoulder Pads?
No, the Accel FHR features comfortable and lightweight shoulder pads integrated into the design of the device.

Will the Impact Accel Restrict My Body Movement?
No, the Accel is a flexible device allowing unrestricted upper body and arm movement.

What Can I Do if I Feel the Accel Device Hitting My Helmet?
If it feels too close to your helmet, move the angle back a notch (move bolt up one slot). Likewise, if it feels too close to your seat, move the angle forward a notch (move bolt down one slot).

Will the Accel Device Interfere with My Roll Bar?
No, the low rear section of the Impact Accel allows easy access in tight areas with low roll bars, such as dragsters and land speed cars.

Does the Impact Accel unit come in different sizes?
The Impact Accel FHR is currently offered in two sizes. The Accel device fits most adults, typically a driver weighing 100 lbs or more. The Small device can be used with 2-inch belts, while the Standard size accepts 2-inch or 3-inch belts. See chart below for further sizing information.


Tethers

Do I Need to Adjust My Tethers?
No, the Impact Accel tethers are preset for the best protection. However, all helmets are different in design and manufacture therefore SAH2010 and SA2015 pre-drilled holes may be in different positions. Drivers also have different neck lengths. If your tether slack varies from what is typical, contact Impact for more information.

How do I Know How Long the Tether Should Be?
When strapped in the car with your head in the neutral driving position you will typically have 2 to 4 inches of overall slack. Please refer to the manual or call an Impact representative for more information.


Helmet Hardware

Does the Impact Accel Feature the Helmet Attachment Hardware?
Included in the $599 price you will receive the attachment tether and helmet hardware.

Do I Need to Buy Additional Helmet Hardware or Other Accessories?
No, the Impact Accel device includes all the helmet hardware needed. You can purchase additional sets of hardware if you have multiple helmets.

Will I Need to Drill My Helmet?
If you have a new SAH2010, SAH2015, it is ok to use the mounting plates pre-installed in the helmet. If it is a pre-drilled helmet, you will need to use the backing plates supplied with the Accel device. Otherwise, easy-to-follow instructions for un-drilled and SA2010 helmets are included with the device.

What Do I Do if My Helmet Has Been Drilled?
The Impact Accel will work using the existing frontal head restraint holes. Simply install the helmet hardware using the backing plate (washer nut). You will need to detach the backing plate from the helmet hardware (the backing plate is attached to the QR helmet hardware from the factory). The backing plate installs inside the helmet - between the foam (helmet liner) and the inside of the helmet (shell). Refer to the instructions included with your device.


Seats and Belts

What Size of Shoulder Belts Work with the Accel?
Both 2-inch and 3-inch shoulder belts work with the standard Impact Accel FHR.

How do I Best Set Up My Restraints to Work with the Accel Device?
The Impact Accel device works most effectively with properly installed restraints. For more information on proper restraint mounting, refer to the “Seat Belt Installation Guide” on the SFI Foundation’s website here

What Size of Shoulder Belts Work with the Accel?
Using the set-up instructions included with the device, you will be able to determine your seat angle. The Accel FHR will adjust from 10º - 40º.


SFI 38.1 Recertifications

SFI 38.1 Frontal Head Restraint systems must be recertified every five years to comply with the SFI certification. Devices passing the inspection will receive a new SFI 38.1 conformance sticker marked with the inspection date and will remain valid for five years from the date stamp indicated on the SFI 38.1 conformance label. Please see the chart below for potential costs for this service. Contact an Impact representative for more information or to schedule your needed recertification.

Level 1 Service: Inspect and Replace SFI Tag = $25

Level 2 Service: Inspect, Replace SFI Tag, and Replace Tether System = $45-100

Level 3 Service: Inspect, Replace SFI Tag, Replace Shoulder Pads and Tether System = $120-200