Generation 4 Performance Modifications

Dan Cragin

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2008-2010 VIPER ENGINE PERFORMANCE UPGRADES


The new Viper engine can be modification friendly and very reliable if the combination of parts is properly designed. Power gains of 100hp are possible.

EXHAUST MODIFICATIONS
The new Generation 4 engine responds very well to exhaust modifications. The increased rpm limit and variable cam timing works well with a tuned aftermarket exhaust system.

There are numerous exhaust options for the Generation 4 engine. Below is an explanation of the characteristics of each.

Note: Use of headers on a 2008-2010 models will not pass a visual emission inspection in California.

SIDE EXHAUST SYSTEMS (Retains production catalyst) 10-12hp
Changing the side exhaust gives your Viper more tone, character and marginal power gains. Other benefits are reduced exhaust related heat and attractive polished or chromed exhaust tips.

Belanger/ DC
Belanger makes this system for DC Performance and features stainless Magnaflow mufflers and chrome tips. This system is for those who like a system with a louder sound and more tone. Available in 2 ½ inlets (for hookup to stock exhaust) or 3-inch inlet for hook-up to Headers or high flow cats.

Corsa
The Corsa “track” system is a very high quality stainless system with resonance canceling mufflers and polished tips. The system has good tone and very little resonance. This system is for those who like a quieter system with more tone. Available in 2 ½ inlets (for hookup to stock exhaust) or 3-inch inlet for hook-up to Headers or high flow cats.

HEADERS


ACRX Merge Headers (35hp)

These headers are the same as used on the ACRX racecar. They are an all-stainless design with merge collectors. The come with high flow cats and turnouts or without cats. The benefit of this header is best peak power and a tuned sound. This system can be used with the stock mufflers or with the DC Belanger or Corsa side exhaust.

BELANGER Headers (30hp)

These headers are a mild steel tri-y design. They are ceramic coated inside and out. They can be supplied with high flow cat or no cats for hookup to the stock mufflers or Corsa exhaust. The system can also be supplied as a complete system with headers, cats and side pipes. A benefit of this system is good low-end torque and less radiated heat under the hood.


* On any header system, we recommend the use of Spark plug boot protectors “Snake Socks”, reflective heat wrap on the O2 sensor wiring and the brake booster hose. Many owners find the production mufflers best for street use (when used with headers)

Ported Intake Manifold (17-24hp)

Our custom ported intake manifold increases upper rpm airflow into the engine. This modification will pass emissions and work well with the stock
Computer or the Mopar Performance Controller. What makes our intake differ from the others is more extensive porting and alignment of the ports to the new generation heads.

Ported Cylinder Heads (25-30hp)
Our ported cylinder heads increase low end and upper end hp and torque.
With help from some of the airflow experts in the industry, these heads take full advantage of development in the choke area of the ports. There is an overall increase in velocity and flow. The results are a linear power and torque increase. Unique porting will not require additional computer tuning or cause check engine lights or limp in conditions.

MoparPerformance Engine Controller (5-10hp)
This controller removes the lag associated with the production controller, has revised fuel spark and cam position tables, Rev limit increased to 6500 rpm with softer fuel cut. 1-4th skip shift removed. Use 93-octane fuel for best results.

* Off road use only.

Air-Oil Separator
Oil vapors pumped into the intake manifold produces engine knock and reduces power. Our emissions compliant oil separator keeps the oil from entering the intake manifold. A must for modified or track engines.

*On track cars, we recommend a colder spark plug to be used in conjunction with the air-oil separator.


Air box inlet Closeout panel

This carbon fiber closeout panel keeps hot air from the engine compartment from entering the air box. Results are cooler intake air temps and more consistent power. This part was originally developed by Mopar Performance and is now sold by Arrow Racing.
 

SilveRT8

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Thanks Dan,
Very good info here, you just ansewred many of the questions I was asking myself for my next mods.
How about air filters, what would be your recommendation ?
 
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