ATI “SUPER DAMPER” HARMONIC BALANCER – DODGE / JEEP 3.7L & 4.7L +HO

ATI SUPER DAMPER DETAILS ATI SUPERIOR DESIGN WHAT IS A BALANCER? CHOSE THE CORRECT BELT SIZECHRYSLER DAMPER CHART

The patented ATI Super Damper is the only damper designed exclusively for low to high rpm performance engines. FINALLY available to the 3.7L & 4.7L / HO community! Air Ram Performance worked along with ATI to bring you the ATI Superdamper to both the Chrysler 4.7L and 3.7L engines with the optional 25% under-drive pulley which is good for a solid 10RWHP gain along with unmatched engine protection!

When ordering, please keep in mind that there are two options to chose from. There is the OEM size pulley and the 25% under-drive pulley options.

The proven elastomer design is actually two dampers in one: a 4″ diameter and a 6.25″ / 7.00″ (depending on pulley option) diameter damper contained in two shells that bolt to the crank hub. The inner and outer shells are available in steel and in aluminum to contain the steel inertia weight. The inertia weight has eight computer machined grooves to retain the proper durometer O-rings (dyno tested for each application), and installed at ATI. O-ring life has been tested to over two million cycles in Winston Cup competition and 10 years in drag racing engines. The unit is rebuild able to new specifications by installing new O-rings. Extensive dyno and on-track testing has proven the Super Damper far superior to all other designs, especially on engines that turn over 6000 rpm, and is used on nearly 100 percent of all Winston Cup engines. Shells are black zinc chromate finished, with computer controlled, laser engraved 360 timing marks. Exceeds SFI 18.1 specs.

* Eliminates torsional crankshaft vibrations
* Exceeds SFI 18.1 specs
* Black zinc chromate finished
* OEM equipment on 392 Mopar Crate Engines
* Tunable, rebuild-able, and extremely efficient at ALL RPM
* Laser engraved 360 timing marks

Under drive pulley systems increase engine horsepower by reducing the amount of power required to drive external accessories. For example, the alternator, power steering, water pump and air conditioner all rob horsepower from the engine. By replacing factory-sized crank and accessory drive pulleys with a resized pulley, the accessories are slowed, resulting in more horsepower available to drive the rear wheels.

For those who dont know what a balancer does or why its important to step up to a performance balancer here is some incite I put together found on the web.The main function of the engine system is to convert gasoline or diesel if its a diesel engine into motion so that you car can move. And this is done by burning it inside the engine which is known as the internal combustion engine. The engine system is composed of various parts and damage to any of these parts will greatly affect the overall performance of the engine that is why some materials and devices are attached to it to prevent this problem. One of which is the harmonic balancer.

Over the years Chrysler has made some changes to the accessories configuration and belt routing.  This means that not all 4.7L and 3.7L applications will use the same belt lengths.  In order to insure you purchase the correct length belt, it is important that you do some homework on the belt length for your specific application.  We have listed 2 belts that will fit most applications, we will add more to the list as customers report the belt lengths /applications to us.

We have listed 2 belts that have been verified on Dodge Rams. If you know the belt length you need for your application, please let us know and we will add it to the product page.

The 25% under-drive pulley will require a belt that is between 2.75″ & 3.00″ shorter than the recommended factory belt. Simply look up your belt size and belt length, then subtract 2.75″ – 3.00″ from that and you will have the correct length belt to run with your 25% under-drive pulley. Simply order the correct belt length that has the same rib count/width (6-rib/20.96width) as factory however shorter for the UD pulley.  If you send us the information, we will add the belt to the product page for one stop shopping

25% UNDERDRIVE PULLEY – RECOMMENDED BELT SIZE:

Most 1999-2007 3.7L & 4.7L engines – 4060855

• Belt Length (in.): 85.50 in.
• Belt Length (mm): 2171.70mm
• Number of Belt Ribs: 6
• Belt Width (in.): 0.830 in.
• Belt Width (mm): 20.96mm

OEM PULLEY RECOMMENDED BELT SIZE:

Most 1999-2007 3.7L & 4.7L engines – 4060882

• Belt Length (in.): 88.25 in.
• Belt Length (mm): 2241.55mm
• Number of Belt Ribs: 6
• Belt Width (in.): 0.830 in.
• Belt Width (mm): 20.96mm

Chrysler Serpentine Dampers

YEARS	ENGINE	DAMPER PART #	OUTER DIAMETER	AVG WEIGHT LESS HUB	SHELL MATERIAL	SHELL #	RIBS	HUB #	HUB MATERIAL
4.7 AND SOME 3.7 RAM, DAKOTA, GRAND CHEROKEE W/BOLT-ON PULLEY OEM (PT# 916236) & 25% UD (PT# 916237)		918429	7.07″ OEM	6.25 LBS	ALUM	918850	6	916311	STEEL
		918428	6.32″  25% UD	3.9 LBS	ALUM	917070	6	916311	STEEL
’05 -’10 NON-VVT	6.1 L / CRATE 392 & 426 HEMI STOCK	918432	6.78″     5% OD	4.5 LBS	ALUM	917071-55	6	916652	STEEL
		918437	7.48″    17% OD	–	ALUM	917073	6	916652	STEEL
		918438	5.67″   13% UD	3.6 LBS	ALUM	–	6	916241	STEEL
’11-’20 VVT	5.7L & 6.4L HEMI CHARGER, CHALLENGER, 300C,GRAND CHEROKEE, COMMANDER, DURANGO	918487	5.67″   15% UD	–	ALUM	–	6	916241	STEEL
		918459	6.78″    6% OD	–	ALUM	917071	6	916541	STEEL
		918486	7.48″    18% OD	–	ALUM	917073	6	916541	STEEL
’09 – ’10 VVT	5.7L HEMI CHARGER, CHALLENGER, 300C,GRAND CHEROKEE, DURANGO, ASPEN	918446	7.48″     18% OD	–	ALUM	917073	6	916246	STEEL
		918447	5.67″     15% UD	3.6 LBS	ALUM	–	6	916245	STEEL
’05 -’08 NON-VVT	300, MAGNUM, GRAND CHEROKEE, CHARGER, COMMANDER	918436	7.48″     10% OD	4.5 LBS	ALUM	917073	6	916247	STEEL
		918435	6.78″     2% UD	–	ALUM	917071	6	916247	STEEL
’03 -’08 NON-VVT	5.7L HEMI TRUCK LENGTH DURANGO, ASPEN	918434	7.48″     4% OD	–	ALUM	917044	8	916248	STEEL
		918433	6.78″     5% UD	4.5 LBS	ALUM	917075	8	916248	STEEL
		918439	5.93″    15% UD	7.55 LBS	ALUM	–	7	916242	STEEL
’09-’20 VVT	5.7L & 6.4L HEMI TRUCK, DURANGO	918452	7.48″    18% OD	9 LBS	ALUM	917044	8	916248	STEEL
	5.7L HEMI TRUCK LENGTH DURANGO	918453	6.7″      6% OD	4.5 LBS	ALUM	917075	8	916238	STEEL
		918454	7.074″   15% UD	–	ALUM	917020	6	916239	STEEL
’15+ VVT	6.2L SUPERCHARGED V8 HEMI HELLCAT, ’18 DEMON CHALLENGER, CHARGER, TRACKHAWK	918483	8.18″       OEM	–	ALUM	918483S	10 & 6	916278	STEEL
		918485	8.90″     10% OD	–	ALUM	918485S	10 & 6	916278	STEEL
’00 – ’10	NEON SRT-4 / PT CRUISER (’00-’10) DOUBLE 4 RIB OUTER SHELL	917469	6.78″     7% OD	4.5 LBS	ALUM	–	4	916422	STEEL