Ingalls 93035 - Manual

© Ingalls Engineering Co., Inc. - 2011 Cherry Street, Suite 104 - Louisville, CO, 80027
(800) 641-9795 - (303) 665-7800 - Fax: (303) 665-7810 - www.IngallsEng.com
Installation Instructions for 93035
Ingalls Engineering Stiffy ™ Engine Torque Damper for 350Z and G35 Sport Coupe
The Stiffy ™ Adjustable Engine Torque Damper is engineered to reduce deflection under hard acceleration and cornering for
improved performance and power to weight transfer. Deflection in the motor mounts, as with the chassis and suspension, is a
formidable enemy in power and weight transfer, robbing valuable horsepower and control. The innovative, built-in damper eliminates
the huge amounts of “torque shock” that result from wheel-hop and once installed; transfers more power to the road and improves
acceleration, shifting, and overall control and balance. The adjustable feature allows the assembly to be tuned and pre-loaded for
racing and street applications.
Estimated Installation Time: One Hour Technical Rating: Easy
Included Parts List:
Required Tools for Installation:
1 - Stiffy ™ Engine Torque Damper 10mm Socket
1 - Engine Bracket 12mm Socket
1 - Chassis Bracket 14mm Socket
1 - Support for Engine Bracket 17mm Socket
1 - Bracket Spacer 19mm Socket
1 - Hardware Kit 15mm Box Wrench
6 - Large Washers 17mm Box Wrench
3/8” Torque Wrench
3/8” Socket Driver (Wrench)
Step 1:
Remove all eight strut tower bar bolts and nuts and remove bar from engine
bay. Keep all eight bolts and nuts and note their original orientation, set all eight
bolts, nuts, and the strut tower bar aside. Diagram shows where to locate these
bolts and nuts in the engine bay on the passenger side.
Step 2:
Remove all four engine cover bolts and nuts and remove cover from the
engine bay. Keep all hardware and note original orientation, set bolts, nuts, and
engine cover aside. Diagram shows where to locate engine cover hardware.
Step 3a:
Loosely assemble the two halves of the engine side Stiffy ™ bracket using supplied M10 short Bolts and M10 Locknuts.
Remove two M8 bolts on the front of the passenger side head assembly (just below the upper radiator hose) and one M12
bolt on the front cover near the center of the engine block. Keep the long M8 factory bolt, it will be reused for the installation of
the Stiffy ™ bracket. Align Stiffy ™ bracket over the three open bolt holes in the engine assembly. Tighten two halves of the
Stiffy ™ bracket together once bracket alignment is correct, torque M10 bolts to 35 ft/lbs. See Diagram below Step 3b.
CAUTION: Observe proper safety and repair procedures for installation of all chassis parts. Some chassis parts require
specialized tools and experience and therefore MUST be installed by a qualified technician; otherwise and unsafe vehicle and/or
personal injury could result. Wear safety glasses and other protection.
WARNING: Before beginning, check for any damaged or loose suspension connections. Loose connections here indicate worn or
broken parts which MUST BE REPLACED. Failure to replace a damaged or worn spindle and/or link may cause the wheel to
separate from the vehicle, possibly resulting in serious personal injury. Installer MUST check for proper clearance. Modification(s)
may be required. Please proceed ONLY if the vehicle owner is completely aware of these potential suspension modifications.