My 08 ACR to ACRX Conversion

F8L SNK

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I thought I would start by explaining where I came from in the car world to where I am know. I know it is not important but I get asked a lot of questions when people see what I am doing.

I come from a Mustang background and have owned two Vettes in the past as well.  I am more an Automobile fan than anything else but the Viper has captured all of my passions in one car.

I started in the Competitive Automotive world street racing, then drag racing.  I have had many Mustangs from nitrous pushrods to supercharged modulars as well as a drag only modular motor with a large turbo.  

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This last Mustang ran 8.36 @ 160 in 2002.  

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I then went through two Vettes before it was time for my first Viper.  I purchased a 2006 off of a showroom display in Spring, TX.  I went to a HPDE day at a local track and loved it.  Unfortunately I decided to go back to my roots and build the car for power.  I ended up installing a 522 stroker with a RSI Twin Turbo System.  I did the entire project myself in my garage.  I did have Tony from RSI stop a couple times and show me where a few things went but in my true fashion I like to build what I drive. This car ran a best of 9.56 @ 155 on a Mickey Thompson Drag Radial and a soft launch (stock half shafts and differential).  

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I had a friend that was building a TT GTS that had never had a car with "Real" power.  He asked that if he attended a driving school that I attend it with him.  I said sure and off we went to Bondurant for the 4 Day Grand Prix class.  This was the beginning of my new passion, Road Racing!  Within the next few months the ACR was released.  I call Bill P up and ordered a Black/Graphite car.  It took from February 08 to Sept 08 to receive the car.  This is the bad part of Viper ownership, hopefully this will get better in the future.  

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Long story short, I have been to many DE/HPDE events, a few ViperDays and now the time has come.  I have sold the 06 to free up a racing budget and I am about to try Wheel to Wheel with the NARRA group.  

I looked into the ACRX but the price of admission and the loss I was going to take on the 08 ACR just didn't sit well with me.  I wish I had an unlimited budget but I am not that lucky.  I asked myself if I thought I could be competitive in the DVC (Dodge Viper Cup) and honestly though no.  I think within a year I might but the racing budgets that a competitive team needs was not in the cards.  Fast forward to today. I want to run SCCA - NASA - and NARRA style racing events.  This meant I had to convert the ACR to full track duty.  After much consideration and research I have decided to convert the car to close to X Specs as possible.  

Things I have learned, boy this could be really long but I'll sum it up.  It is hard to spend money sometimes with Vendors.  Sometimes they don't respond other times they steer you the wrong direction.  As luck would have it, I have assembled a great team to work with.  Tom Francis from Viperraceheadquarters, Jon B with Parts Rack and ART out of Buda are my new team.  Tom has provided access to all the X parts I need for the project, Jon has provided all other parts.  ART is building the new cage.  I originally asked them to build an exact replica to the X Cage, I thought it was good enough for Dodge, it will be good enough for me.  WRONG!  The X cage will not meet the letter of the rules for SCCA or NASA.  This does not mean you can not use an X but you will have to get waivers and mine will not be a real X.  ART instead is building my cage to meet the more strict rules of SCCA and NASA while allowing more room around the cage than the X provides.  The cage will hopefully be done this week.

The motor just got back from ARROW racing and installed by Tomball Dodge so the project will be full steam ahead in the coming weeks and I will update with pics.  I never started this project to document it so I apologize for the lack of pics that I have to date.  I have always wanted to find this information on the internet so I figured since I couldn't find it I would provide it for others. Please follow along and ask any questions you have.  I'll do my best to answer and remember I am not a Professional mechanic, Race Team nor am I a Race Car builder.  I am a sportsman racer that loves to know everything about my car.  I rely on others to do Chassis set up and I work with Coaches to get better.   I always use Archer for my Setups (Russ is awesome!) and I have used Tommy Archer twice for a driving Coach (Class Act and unbelievable behind the wheel!)

I will have everything except for a 2010 wing when I am finished.  I am still trying to decide whether or not to do the Quaife rear but I do have the complete Differential Cooling system that I have assembled from parts. The motor is an Arrow Racing built stock motor with ACRX forged pistons, stronger push rods and the ACRX modified valve covers.  The transmission will have an updated fifth and sixth gear ratios and will still use the stock clutch.  The suspension will be all X including the adjustable sway bar links.  Brakes are stock with brake pads and stainless lines and of course the brake cooling system from the X.  I will not upgrade the rotors just yet.  This project is monumental for me and I am hoping it all comes out as I hope to debut the car in late April for some test and tune at TWS.  I will not run the race but the DE program to help sort out the car.

Here are a few pics of the project:

Installing the brake ducts and radiator cooling shrouds

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Removing the interior for cage install

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DaveGF

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What specifically is the area(s)of non-compliance with the stock ACR-X roll cage?
 
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F8L SNK

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Gutted doors  8)

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No motor

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New wheels, I will be running Hoosier R6's as cost on the Michelen's is too high for my taste. I have another set being made right now.

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Here are some random parts for the build

Fuel Cell
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Headers and exhaust

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ACRX KW Shocks and Springs

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ACRX 2nd set of dive planes

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KoolMat products

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Fire Suppression

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Arrow block out for radiator

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A VERY special thanks goes out to Bernie Katz for letting me use two different X's to do my research on.  

I have many more parts but this should help summarize what I am starting with.  Hopefully I will be under full construction within the next week. It will all be contingent on the cage completion.  I am really excited and hope you all enjoy.
 
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F8L SNK

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Here are a few pics of the cage when I picked up the car.  I have painted the cage and installed the coolmat in the drivers compartment.  

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F8L SNK

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Here are the roll bar attachment points.  You will notice on the main hoop there is a gap that will be filled with a filler panel and sealant when I am done.

This is the main hoop attachment

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Here is the front tie in

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Here is the shock tower mounts

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Some miscellaneous painted cage pics

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Fuel cell mock up

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vpower01

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Wow congrats! Looks like it's going great.
Keep us posted and the pics are great so far.
Cheers:drive:
 
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F8L SNK

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Brake Ducts from off the car view when trimming splitter

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On Car from Wheel well

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From Bumper

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F8L SNK

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Interior Pics

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Fuel Cell Pic

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F8L SNK

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Exhaust

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F8L SNK

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Arrow Blockout

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Top View of Canards

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Fuel Cell Panel

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Firewall AC Delete Panels

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F8L SNK

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Foot well plate

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Differential Cooler (I could not find the molded plastic that directs air so I made one out of aluminum)

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Of course the bending and welding of this still needs to be done, that will require a trip to a friends shop (I can't weld much less weld aluminum)

Here is the base plate for the fire bottle

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F8L SNK

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Dave,

Due to the fact my car is not a "spec car from Dodge" I have to follow the rules as written. The rules state the main hoop must be on the same plane. The X cage makes two bends on each side down by the frame attachment point. If you notice in my pictures mine is straight from the frame up to the top.

The X can still run SCCA etc... as it is a spec race cage and that is all it takes. Mine is obviously not built by Roush/Dodge so I can't get away with it.

What specifically is the area(s)of non-compliance with the stock ACR-X roll cage?
 

BlknBlu

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Great project with great detail on the car. If you need pics of specific ACRX parts and options let me know. I have access to one.

Bruce
 
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F8L SNK

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I appreciate it but I have almost every detailed shot already I have had great access to a couple of them

:smirk:

Great project with great detail on the car. If you need pics of specific ACRX parts and options let me know. I have access to one.

Bruce
 

Nine Ball

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Tim, you are crazier than I thought. LOL!

Nice pics, looking forward to seeing the car completed.

Tony
 

Viperless

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Hell of a project! You've had some badass cars but this one will be the baddest of them all!
 

B & R

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Tim:

We have missed your company at the DE's. Hope you have the beast up and running soon! Looking forward to seeing it soon.

Richard
 

ACR steve

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The car looks awesome - just curious for the money you will have in this car you could have bought an X with money to spare?
 

AFL in NJ

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Cool project; I hope you get some amazing results when you get to race!

I have a few questions:

1) I'm assuming by decontenting a stock ACR that you've dropped some serious weight....I'd love to know how much your ACR with X additions weighs?

2) ACR-X's came with 640 hp +/-, any idea what your motor puts out?

Regards,
Aaron
 
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F8L SNK

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Steve, I priced an ACRX with paint the way I would want. With that in consideration I am almost dead even. This is taking the original price of my car not the current value. When subtracting the loss I would take on my car I am $25K plus better than an X. Trust me I didn't want to do this myself that bad. Even money is not worth it even though I love the build.

I am doing everything myself labor wise, other than the cage of course.

The car looks awesome - just curious for the money you will have in this car you could have bought an X with money to spare?
 
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F8L SNK

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Aaron,

Good questions, my car should weigh in almost identically to the X. It is all the same components and cage material. I believe they came in at 3240 or close to that. I don't know for sure but will scale the car when done. I had a ******** before this started so I am curious as to final weight as well.

As far as horsepower it too should be the same as the X. It has been to Arrow for the same pistons and runs the same cam, exhaust etc... The only difference here is the PCM is the Mopar controller not the X Controller. I have heard they have changed a few sensor parameters but have not heard if they actually added timing or changed fuel curves. I expect it to be close however.

Thanks for the kind words.

Tim

Cool project; I hope you get some amazing results when you get to race!

I have a few questions:

1) I'm assuming by decontenting a stock ACR that you've dropped some serious weight....I'd love to know how much your ACR with X additions weighs?

2) ACR-X's came with 640 hp +/-, any idea what your motor puts out?

Regards,
Aaron
 
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F8L SNK

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Couple of items I did today

Had tabs welded on the catch can to mount in correct location.

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Had the diff cooler bracket welded up. First coat of paint is laid but need to clean it up a little.

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gilly6993

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Wow....amazing build....gotta ask one question though.....you're doing all that and you're worried about the cost of the tires? :D
 

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