Project BlownZ06 is Dragzine’s most ambitious build to date, centering around the ground-up construction of a C7 Z06 Corvette by PMR Race Cars for Outlaw Drag Radial, Limited Drag Radial, Pro 275, Radial vs The World, and other radial eliminators with the NMCA, NMCA West, and Outlaw venues.
We’ve partnered with the world-renowned team at Pro Line Racing for a unique new partnership, in conjunction with ProCharger, to assemble a first-of-its-kind supercharged 548 cubic-inch Hemi engine package for the build that we hope will have the same world record-setting result as other Pro Line and ProCharger customers.
July 16, 2017
There has been a tremendous amount of work done by the team at PMR Race Cars on BlownZ06. We’re excited to share it all with you. This is a lot of pictures, with some captions telling you guys what is going on. With this project, we have about 10 different articles that we are going to be publishing on it, but in the mean time, we are testing you with our photo galleries of the updates!
You can see we have the Pro Line Hemi in place and we are starting to lay out the frame rails.. this is a critical part of the process.
The rear of the car, with the anti-roll bar and rear end in place. We are starting to work on the mid plate. The rear tree is under construction as well.
We are starting to get the engine in place and figuring out how to design the front frame rails.
Here we are setting up the front strut locations, and we have the front down bars roughed in.
You can start seeing some of the magic. We’ve got some VERY trick JRi front struts on this radial ride. This is a JRI 6-inch travel front strut in a Strange Ultra housing. Using the Strange spindle-mount system, the Weld wheels, and the RJ’s adjustable upper front strut cup.
Another angle of the front suspension.
Going to the rear of the car, we have mocked up the JRi 21.5-inch, 7-inch stroke rear shocks – 4 way adjustable. You can see the Carbon Strange 5 x 5 rear brakes, and the RJ’s 4-link.
The RJ’s Extreme 4-link brackets are works of art. This gives very precise 1/16-inch movement in the 4-link.
You can see the full rear of the car mocked up here with the RJ’s 4-link and RJ’s wishbone. Killer.
Reid supplied our Turbo 400 bell housing and case for the Hemi. We are mocking up the M&M Turbo 400 and you can see we have the double frame rails roughed in as well.
Front of the car is ready for the ProCharger 136/143 and the Chris Alston/CDS Gear Drive to get mocked up.
PMR’s fabricator’s doing their welding magic.
To comply with Limited Drag Radial and other rules, we must cut the factory rear quarter panels into the rear of the car and not use the lightweight ones that come with our kit. Oops. This isn’t a big issue as they are effectively identical.
RJ’s lightweight steering wheel, steering kit, and the rack from Stilleto.
With the Weld Wheels and the Mickey Thompson 315 radials, we have a roller.
Wow that looks stunning.
Bird’s eye view of BlownZ06.
Complete roller, angle 2.
One last thing that we can’t go without showing. The beautiful exhaust flanges from our friends at Pro Fabrication. These are absolutely beautiful and the guys at Pro Fab do these for Pro Line exclusively. Can’t wait to show more pictures of these CNC flanges when we do the exhaust article!
May 11, 2017
Look at what Santa dropped off: a Pro Line 548 Hemi mock-up engine. It was glorious … an all-billet block and heads with a Visner billet intake manifold topping it all off. We will be using the billet Pro Line engine to mock everything up within the frame rails and front suspension. Sadly, our sugar plum dreams of riding off into the sunset will need to wait for our “real” engine, not just a mock-up.
PMR continued to make progress on the chassis. Right now, we’ve got the QuarterMax Extreme 4-link mocked up with the QuarterMax Extreme Adjustable Billet 4-Link Chassis Brackets which are extremely trick as part of the construction of our rear tree. This 4-link system gives you a great deal of flexibility.
This 4-link system features billet weld-on chassis brackets that utilize a unique bolt-on 4-link plate system with a keyway that allows both top and bottom 4-link plates to move up and down in increments of 1/8-inch, allowing fine tune adjustments to be made to the instant center of the 4-link.
May 5, 2017
Well, BlownZ06 is no longer merely a rendering. The guys at PMR Race Cars in Rancho Cucamonga, California are already bending pipe and laying welds, and they’ve made some significant progress in a short time. With the help of Quarter-Max Chassis & Racing Components and Strange Engineering they’re pretty far along with getting the chassis mocked up. We have an extensive quantity of Quarter-Max and RJ’s parts on the chassis side, and we’ve got some beautiful new Strange Carbon fiber brakes.
Building a class-legal C7 Corvette drag car is not a simple or cheap endeavor. It required a lot of extensive dialog with rules makers and with our chassis partners to figure out how to handle and interpret the variety of rules that existed out there in some of these classes. Unlike a Mustang or a 1969 Camaro, the rules simply aren’t written with an all plastic/composite body shell road racing beast in mind.
The biggest challenges lay in a few simple areas:
The C7 Z06 body is compromised of composite panels bolted to a plastic inner structure, which is bolted to a combination of outer framerails and various aluminum supporting brackets and stiffeners.
The framerails run front to back, bumper to bumper, but are large, bulky, and on the outer perimeter of the frame bonded to the rocker panels.
The firewall and window “box frame” area is plastic and aluminum and does not comply with NHRA requirements.
The roof is a removable “T-top” type roof that snaps in to the non-NHRA compliant “box-frame” for Pro Mod and/or supercharged methanol combinations.
The biggest challenge – the front suspension is a large mono-leaf that does not either lend itself to drag racing or have any available aftermarket options.
In speaking to many rulesmakers, it was determined that we would need to gain clarification from both others that had built Corvettes, but also talk hand-in-hand to figure out how to build a class-legal car that still met NHRA legality and was comparable to other class category cars. What we were eventually able to work out was a set of common rules variables:
Use of factory OEM Corvette frame rails from the center of the spindle through the rear of the main body in the OEM location
Factory Corvette wheelbase
Factory Corvette lights, tail lights, side marker lights, etc.
Stock body length, appearance, and profile is needed for all body components
The use of OEM Chevrolet rocker panels, inner door jambs, and inner-door structure
Utilizing factory OEM C7 “Z06” rear quarter panels, aka “real glass”. This will require joining together the OE factory quarter panels into the rear Skinny Kid race cars hatch/bumper. Luckily, we found some Z06 fenders on eBay for a reasonable price!
A “strut” retrofit was acceptable/legal so long as we retained the factory subframe/framerails
Here's the progression of the first few days of construction, from fitting the body to the OEM framerails, to actually laying pipe.
Because the rules many of the categories we’re planning to compete in require the factory framerails, we purchased a set of OEM framerails and body panels to build the car from the ground-up, rather than cut apart a valuable Z06 and waste both time and money. With this in mind, PMR had to start from the outside in, rather than the other way around, to incorporate the factory framerails into the build.
Here’s Tony Mandella and the gang at PMR checking out the position of the containment seat as they progress along on construction of the roll cage.
They began by mocking the body up on the frame rails, since the placement and positioning, in regarding to the OEM door jams, rockers, will be dictated by the frame rails. They’ve since mocked up and partially tacked much of the roll cage, and by the next few weeks we will be finalizing much of the welding on the chassis.
BlownZ06 will be rolling on these beauties from Weld Racing: Full Throttle Fronts combined with 15x15 double beadlock rears. We'll have an in-depth look at Weld's newest all-out race wheel in the coming weeks.
Here’s a look at the trick rearend housing fabricated by Skinny Kid Race Cars for the build.