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Welcome to the updated Viper Garage.  We look forward to exchanging stories, events, tech info, pictures and fun.  Welcome to our humble Viper Home
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RT/10 & GTS Viper Discussions / Re: Tom's 40mm brakes are back!
« Last post by 40mm on July 17, 2017, 07:47:28 AM »
Thanks RTTTTed.
They are a great addition to any non-ABS Viper.
Tom did a lot of work... I'm just riding his coattails on this ride.

Well folks.... they're all gone for 2017!
Apparently there was a bit of a pent up demand for them.

No worries though, they will be back for 2018!

Once I get all the cores back I'll do another run of at least 10 sets this winter.

If anyone wants to get their name onto a waiting list, just email me at ricks40mm(at) or text me at the number above.

Thanks to everyone who purchased a set!
Cheers to all.
How-to section / Re: Headlight resoration with bug repellent
« Last post by RTTTTed on July 13, 2017, 11:57:56 AM »
I did notice that when I checked the next day the headlight lens was filmed over again.  Not as much as before i started but definitely filmed again
How-to section / Roe Racing 2.4L blower oil dip stick build
« Last post by RTTTTed on July 12, 2017, 10:52:54 PM »
Many7 peopel have lost their original Roe Racing blower's dipstick.  I took a pic and am posting it so measurements are recorded so you can use a tape or make a stick to measure the amount of oil in the front bearing gear case.

From top of blower case to Full oil level is 3.1" and "Add level is 3.3" from top of case.  The plug to check is at the top front of the blower case on the right side.
How-to section / Gen 2 Traction Control, ABS, Tone ring info
« Last post by RTTTTed on July 11, 2017, 09:16:28 PM »
I have a Twin Turbo '99 GTS and a 2001 ABS supercharged GTS. 

I bought a Motec M800 for the TT to add Traction Control because smoking thye heck our of slicks at 140mph while not even using full power doesn't feel safe. My TT has $11,000 Mark Williams rear haflshafts and I needed to add a Tone ring to the axle as well as install a Hall effect sensor to the rear spindle.  I purchased a front ABS spindle because it comes with the axle tone ring and hall effect sensor already mounted.  Since I'd purchased a Wilwood brake kit for running 15" wheels and slicks I spent nearly a day grinding the circle of the adapter bracket Tone ring to fit through the spindle while attached on the axle.  I had to cut the spindle side of the bracket to allow clearance for the Hall Effect sensor bracket I purchased from John Reed and Jason Oefelein of Portland Speed Industries for my Motec Traction Control.  I purchased the Gen 3 Tone ring from Unitrax and was gifted a pair of busted axles from Clint Shearer.  Got the Gen 3 tone ring and compared that to my Gen 2 ABS rear axle Tone rings.  They were not even close!  Aftermarket axles (DSS and Mark Williams) require the larger Gen 3 tone rings.  Although the Gen 3 are significantly larger, they have the same 45 "tones" on both so are interchangeable  -with mods such as different depths of Hall Effect sensors (which requires a custom bracket or one from John/Jason at 

The ABS rear axles of my 2001 came with tone rings on the factory axles.  My 800hp Unitrax 800hp alxes and later my 1000hp Titanium Unitrax axles came with the tone rings.  My DSS 1200hp axles required Gen 3 tone rings and none were included on the axles.  The Gen 2 tone rings are too small.  Changing to the larger tone rings also means that the factory sensor spacing is wrong and needs to be changed to the custom PSI bracket or modified to move farther from the center.
RT/10 & GTS Viper Discussions / Re: Front mount twin turbo all out build
« Last post by jtin on June 22, 2017, 06:15:04 PM »
Well I got the TH400 in the car and went 9.6@144@10psi.

Still lots of data to be collected but heading in the right direction after a painful last few months trying to find multiple issues.

The trans has been flawless.  Wish I bought it the day I bought the car. It has surpassed all my expectation and makes a 6 speed a thing of the past for me personally.
RT/10 & GTS Viper Discussions / Re: MY TT GTS (Ted's)
« Last post by RTTTTed on May 17, 2017, 11:22:16 PM »
I bit the bullet and bought myself a 4 speed Lenco racing transmission.  Rated at 2500whp and designed for clutchless shifting will mean much faster times and higher speeds.  I will need to program the Motec for throttle cut using pressure sensors on the shifters to cut power to the engine for a few micro seconds to lower hp while shifting or full boost shifting will blow off the tires and make me sping out.

I also bought a ProMod upgraded Bear Vendor so I can keep my overdrive gearing. 

To bolt the Lenco to the scattershield I purchased a 3/4" adapter plate that looks to have been an ATI T56 to GM adapter plate with Billet HRB which locates the Lenco transmission perfectly.  I'll need to drill out the Lenco pattern into the adadapter plate, but it will be simple to center the transmission.

I also upgraded my Mcleod twin disc ceramic 1500whp clutch for a Billet triple disc Carbon clutch. 
RT/10 & GTS Viper Discussions / Re: Tom's 40mm brakes are back!
« Last post by RTTTTed on May 17, 2017, 11:13:58 PM »
Way to go Rick!  After having 2 Vipers with Tom's 40mm brakes I was really sad that he quit makiung them.  My Vipers had a huge gain stopping with Tom's 40mm calipers compared to stock. 

To run 15" wheels on my 1500whp Twin turbo I changed to Wilwood 4 piston calipers and slightly smaller rotors.  My cost was $1600 and after all the screwing I got it took 3 months to finish the job.

My 2001 supercharged Viper ABS brakes worked great on the street, but some idiot decided to drill the brake lines to bolt on the extreme outside and that required 18" wheels for the 43mm single piston calipers.  Since I have a set of 16" Drag Pack slicks and a set of 17" CCWs I needed to get proper brakes on the back of my car so I installed a pair of IPSCO front Gen 2 to rear adapters and can bolt my 16" wrinkle slicks on the car now!!!

When I sold the Tom's 40mm upgrade calipers from my TT the new owner used them on his car for Road Racing.  He was very impressed with the huge difference in stopping distance!
RT/10 & GTS Viper Discussions / Re: Tom's 40mm brakes are back!
« Last post by 40mm on March 30, 2017, 06:29:08 PM »
Edited for correct email address

RT/10 & GTS Viper Discussions / Tom's 40mm brakes are back!
« Last post by 40mm on March 29, 2017, 07:11:10 PM »
Tom's 40mm brakes are back and they are as good as ever!
The only change is they're now made by Rick.

As you may know, Toms's life got super busy and he stopped making the 40mm brakes a few years ago. I installed one of those last sets on my 2000 RT10 and I immediately approached Tom because it was too good a product to let die. So, I've taken over his business of building the best bang for the buck braking mod for all pre-ABS Vipers, and I aim to make him proud!
  I've changed nothing from Tom's design. He's given me his spares, suppliers and the knowledge to do his mod; I'm even using the same machine shop he used to machine the calipers and pistons.

I don't really need to say what these rear calipers do for the braking balance for the Gen 1/2 (non-ABS) Vipers- a forum search will say it all.
It's a simple, hour long straight up caliper swap that allows you to use whatever stock sized pads and rotors you like, with no cutting or modifications needed on the car whatsoever. It brings the car into a near-perfect braking balance and all but eliminates the dreaded front end lock up that is the problem with these front brake heavy cars. It really is how these cars should have come from the factory.

You get a pair of ready to install 40mm modified rear calipers, rebuilt with all new rubber seals and o-rings, sandblasted and painted in hi-heat caliper paint.

The price is $800/pair shipped, exchange only. I need your old calipers sent back to me in Buffalo NY in order to keep this business going. You can send them after you've installed the new ones- so no car down time.

I have 5 sets ready to go, once they're gone I likely won't do another run until the fall.

I can also do rebuilds if you have tired or leaking 40 and original 36mm calipers.

Any questions please PM, email ricks40mm(at) or call/text six four seven 992 3933.

Thank you!
Rick Schaefer

Oh, and for any Canadians here... I'm also in Toronto so I can make a great deal for you without worrying about the crappy exchange rate and cross border shipping.
How-to section / Re: DIY Big Brakes Gen1/2
« Last post by RTTTTed on March 10, 2017, 06:04:42 PM »
 I copied and pasted this info from MotoIQ written by a Grand Prix Racer      "BRAKING

The Viper’s braking performance is horrible and it has always been a shortcoming of the car in every magazine competition.  The main issue here is not a lack of stopping power since the Viper’s 38/42mm 4-piston Brembo front calipers are larger than the Brembo “Lotus” (Esprit V8) and 2000 Mustang Cobra R front calipers and the 13 x 1.25” front rotors are quite large for the day.  The problem is that due to the lack of ABS, Chrysler built in so much front brake bias in attempt to make the Viper “Safer” under braking so it will never spin out.

The use of a 36mm single-piston Lotus Esprit rear caliper (which is the same as the rear Elise caliper) on a 13 x 0.87” is not powerful enough to make the rear 345 tires contribute very much to of the deceleration of the car, thus making the front tires do all the work.  Increasing the rear brake bias will greatly improve the stopping ability of the car, but we will cover that in a future article.

*The ABS-equipped 2001 & 2002 Gen-2 Vipers had a larger 43mm rear caliper which reduced the 60-0 braking test from 122-155 feet (depending on the driver’s ability) down to a consistent and competitive 110-115 feet.  The 2003+ Gen 3 cars were able to shorten that distance down to 97 feet.

During our test, the stock 18 year old pads did not hold up very well to track use.  After a couple hard braking zones, we still had good pedal stiffness but the car would not stop.  We are unsure of the age of our brake fluid but due to our pedal not dropping to the floor, we glazed the stock pads before we boiled the fluid.  We will be changing out the pads and fluid and be sure to re test.

Before fading the brakes, we were able to produce a spike of 0.96 Gs of braking before locking up the front tires.  You can see a drop in longitudinal Gs in attempt to unlock the tire before the deceleration stabilized around 0.8 Gs.  For comparison the McLaren 12C could brake consistently at 1.0 to 1.2 Gs.

“If the Viper GTS hadn’t been dead last in braking performance, it would’ve thoroughly spanked its opposition at the road course… sticky tires gave the Dodge race-car-level grip but the ABS-less Viper had devilish tendency to lock its fronts under heavy braking, raising the Dodge’s lap time by a few tenths.” – MotorTrend 5/1997"

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