08 mods
- Thread starter alpha85
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And subject of a running thread "Belanger&PCM upgrade" Arrow Racing Engines,the folks that do all the warranty work for Viper engines can port the lower portion of your intake manifold....do not have it on my car yet but good for another 20-25 HP......
mjorgensen Woodhouse
Enthusiast
The heads can be done although the factory porting is exceptional. The Mopar PCM would need to be utilized with this mod and while you are at it you might as well do the intake porting, Belanger headers and Corsa catback to get the most from it.
I agree with Mark. The port and chamber uniformity of the Gen-4 heads/Intake is exceptional to say the least. Personally, I would rather see stable and usable power from cleaning up and polishing any flaws in the runners/castings than trying to alter [and likely greatly reduce the uniformity] of the CNC chambers and throats. Additional gains can be seen by using ceramic coatings to increase heat reflection of the chambers, as well as keep the heat in the exhaust runner and out of the head casting. Lastly, the addition of different valves can offer increased valvetrain stability at the top of the RPM range.
SilveRT8
Enthusiast
Just ordered this K&N cold air intake from JonB, car is stored for the winter so I will only test it next Spring to verify the 18+hp,
but the sound and look improvement alone made me go for it.
http://www.knfilters.com/search/product.aspx?Prod=69-2527TTR
but the sound and look improvement alone made me go for it.
http://www.knfilters.com/search/product.aspx?Prod=69-2527TTR
ViperGTS
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Power is enough. No need to increase. Not really.
First Viper I own (had 4 so far and driven some others of friends) which you do NOT have to modify IMHO if you are ok with the gas pedal (Mopar PCM) and sound (cat back or HF cats are a good thing with the Mopar PCM, but no more popping sound). Suspension is best also - MOTON's if money is no issue.
Perfect car.
First Viper I own (had 4 so far and driven some others of friends) which you do NOT have to modify IMHO if you are ok with the gas pedal (Mopar PCM) and sound (cat back or HF cats are a good thing with the Mopar PCM, but no more popping sound). Suspension is best also - MOTON's if money is no issue.
Perfect car.
underpressure
Viper Owner
Hello,
Saw this thread and felt I might have some data to add...
We are currently working on a '08 Viper and after installing the Ballenger headers, Ballenger exhaust, and Mopar Performance PCM we picked up 20 WHP on a Dynojet dyno.
These gains were good but not exactly the amount of power we were looking for. The decision was made to incorporate NOS as an additional power-adder knowing the motor is not forged and a built motor could be in the future
. Since we couldn't find an "off the shelf solution". We utilized a DBW (drive by wire) window switch which needed be calibrated for a 10 cylinder firing pattern (instructions only support up to 8)and a NOS wet fogger kit. We had to fabricate a fixture for the NOS fogger and purchase an additional fogger for the second throttle body. NOS does offer a kit for a Nissan 300zx twin turbo that will work but they were currently out of stock. Additionally, we also took on the task of making a custom intake to replace the factory piece and provide us mounting point for the NOS foggers.
Knowing how sensitive the MAF sensors can be. We took extra caution locating them and trying to find the correct size of the tube. This was a challenge and we did have to opt for a little smaller ID on the new intake over the factory piece. This later resulted in a CEL and subsequently a version 2 intake now in development. It seems even the smallest change on the tube increases air flow velocity and since the air flow versus throttle position are linked together for DBW the PCM reacts by taking the car into a limp mode. This issue can be immediate or take as long as a drive cycle to pop up.
As you can see by the dyno graph the window switch is set for 3000 RPM and cuts at 6000 RPM. We did hear about some issue of another NOS equipped car not being able to shift into another gear while the NOS was engaged without the car going into a limp mode however, we have not experienced this.
We will try to add more data once the second intake is finished and we retune the NOS. Currently it is jetted a little fat @ 11.0 AFR. Also, we might be taking the factory PCM out of the loop and installing either Pactel or Motec solution gearing up for a forced induction build possibly.
Enjoy!
Saw this thread and felt I might have some data to add...
We are currently working on a '08 Viper and after installing the Ballenger headers, Ballenger exhaust, and Mopar Performance PCM we picked up 20 WHP on a Dynojet dyno.
You must be registered for see images
These gains were good but not exactly the amount of power we were looking for. The decision was made to incorporate NOS as an additional power-adder knowing the motor is not forged and a built motor could be in the future
. Since we couldn't find an "off the shelf solution". We utilized a DBW (drive by wire) window switch which needed be calibrated for a 10 cylinder firing pattern (instructions only support up to 8)and a NOS wet fogger kit. We had to fabricate a fixture for the NOS fogger and purchase an additional fogger for the second throttle body. NOS does offer a kit for a Nissan 300zx twin turbo that will work but they were currently out of stock. Additionally, we also took on the task of making a custom intake to replace the factory piece and provide us mounting point for the NOS foggers.
You must be registered for see images attach
Knowing how sensitive the MAF sensors can be. We took extra caution locating them and trying to find the correct size of the tube. This was a challenge and we did have to opt for a little smaller ID on the new intake over the factory piece. This later resulted in a CEL and subsequently a version 2 intake now in development. It seems even the smallest change on the tube increases air flow velocity and since the air flow versus throttle position are linked together for DBW the PCM reacts by taking the car into a limp mode. This issue can be immediate or take as long as a drive cycle to pop up.
You must be registered for see images attach
As you can see by the dyno graph the window switch is set for 3000 RPM and cuts at 6000 RPM. We did hear about some issue of another NOS equipped car not being able to shift into another gear while the NOS was engaged without the car going into a limp mode however, we have not experienced this.
You must be registered for see images
We will try to add more data once the second intake is finished and we retune the NOS. Currently it is jetted a little fat @ 11.0 AFR. Also, we might be taking the factory PCM out of the loop and installing either Pactel or Motec solution gearing up for a forced induction build possibly.
Enjoy!
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Malu59RT
Enthusiast
Keep us updated on the build, sounds cool!
I am still on the fence on the K & N Air Intake--waiting for some verification of the 18rwhp claimed gain. AT $575 or so and going "non-factory" I am not sure this is a good mod. On my Z06 K & N claimed 27rwhp. Maybe Dodge was straight with us when they indicated that the factory air intake is about as good as it gets?
Keep us posted on gains!
Keep us posted on gains!
underpressure
Viper Owner
I would also like to see a before and after dyno chart on the K&N set up. Knowing how sensitive the MAF sensors are it seems unlikely that you could have any increase of air flow without effecting the PCM. Unless, with the power of computational fluid dynamics (CFD) you increase the size of the tube to compensate for the increased velocity. So you get more air but, at the same flow rate over the sensor. Just might have to get a kit to see what they are doing
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If top of the line headers and exhaust only increased hp by 20 I doubt the K&N
intake will get you 18 by its' self.
RD
Cop Magnet
Enthusiast
Yes, but their gains were exceedingly low compared to others!
Headers are done by
M&M Performance (My company)
Belanger
Henn*****
I don't know of any others out there making them for the 08-09' yet. All of them have similar gain but only one has a no check engine light with stock pcm.
M&M Performance (My company)
Belanger
Henn*****
I don't know of any others out there making them for the 08-09' yet. All of them have similar gain but only one has a no check engine light with stock pcm.
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