206 Kerns Avenue

Greenville, SC 29609

Shop Hours:

Mon-Fri 9:00am to 5:30pm

Saturday by appointment only

While your vehicle is being worked on, rest assured we will take every precaution to protect your vehicle.

Check out our 1000+ rwhp turbo Cobra here!

Dyno Day 8-23-08 was a success with over 150 people in attendance! Thanks to all who came out and supported us! Check out some of the picture highlights here.

Rodney's (one of our staff members) Monte Carlo SS at the local eighth mile track where it runs 6.90's @ 100 mph! This car is a naturally aspirated 355ci full weight/factory interior street car. Click image to enlarge.

Rock wins the FastGM "Street Tire Shootout" at Shadyside Dragway 11/9/08 with a 7.20 ET @ 104 MPH (1.67 60')! This shootout requires contestants to use regular street radial tires, no drag radials are allowed. More pictures can be seen here...

Jeff's naturally aspirated, stock bottom end LS2 GTO puts down 503 horsepower at the rear wheels after a JR Racing dyno tune! Pictured to the left is the GTO wrinkling the Hoosiers at Shadyside Dragway during some initial shakedown runs. Best ET for this daily driven vehicle so far has been 7.14 @ 98.6 MPH on a 1.57 60'. More info on this car as well as the dyno sheet can be found here...

Dave's 2009 Stryker Blue G8 GT puts down 434 rwhp & 400 rwtq after a JR Racing dyno tune! Mods include a non-DOD cam, long tubes, and a 3200 stall converter. The dyno graph and more pictures of this car can be found here...

JR Racing Performance Tuning beats the competition! Kellen's 2002 T/A previously had a "custom tune" from a big-name, nationally known shop from the southeast where it made 384 rwhp (on their dynojet) and would hardly idle. Once the JR Racing staff went to work on it, it left the shop making 413 rwhp! In addition, the car now idles much better. Check out the dyno graph here...

Tim's 2001 Z28 has a cam from a "big name" shop, but was plagued with some driveability and gas mileage issues. So Tim called on the JR Racing crew to take care of those issues with a custom tune. This beast put down 545 rwhp and 605 rwtq on a 125 shot! Check out the graph here...

Delbert's '01 C5 convertible gets a JR Racing dyno tune! This car never sees the rain and is so pristine we had to put gloves on just to work on it! With a mild heads/cam setup and JR Racing tune, it put down 409 rwhp! Check out the graph here...

Mike stops by JR Racing for a few dyno pulls in his 02 Z28 M6 and puts down 370 rwhp. Check back soon as this car will be making some nitrous pulls next!

Brandon's 02 WS6 gains 57 rwhp with just a set of LPP long tube headers and a JR Racing dyno tune! Check out the dyno graph here...

Just say no to mail order tunes! BJ's heads/cam '98 Z28 showed some serious tuning issues after a baseline pull of only 335 rwhp on a mail order tune. The JR Racing team quickly identified the issues and got this Z28 making some very respectable numbers! Final pull was 440 rwhp after the JR Racing tune! Furthermore, this was done with stock ported 853 castings, 224 cam, and through a Ford 9" rear end. Check out the graph here...

JR Racing offers the best tuning and customer service in the upstate! Check out some of our tuning customer testimonials here.

David's '04 GTO with LT headers and a cold air intake gained 32 rwhp after a JR Racing dyno tune! Baseline pull was 306/322 and final pull was 338/352. Check back later as this car will be getting a cam install next...

Yes, this is the car that has been known to put down a local turbo f-body with an over-confident tag...

Bryan's '99 C5 made 426/408 on motor and 560/672 on a 150 shot after a JR Racing tune! Mods include a G5X4 cam, LT headers, and a set of stock LS6 heads. Best ET on motor so far has been a 7.34 @ 98.2 MPH on a 1.73 60'. Nitrous passes coming soon! Check out the dyno graph here...

This nice '04 C5 only has 18k miles on the clock! Chris's C5 made an impressive 322/340 after a JR Racing dyno tune, with the only mods being a CAI and catback exhaust! Check out the graph here...

Granger's T/A puts down some nice numbers after a JR Racing dyno tune. The car made 380 rwhp and 374 ft-lbs of torque. Mods include a TSP 228R cam, long tubes, and a Yank SS3600 converter. Check out the dyno graph here...

Todd's 99 C5 FRC makes some strong numbers on the dyno after a JR Racing tune--464 rwhp and 427 ft-lbs of torque! Mods include Cartek 4X heads, 230/228 cam, FAST 90mm intake, and long tubes. Look for some track times coming soon. Check out the dyno graph here...

Robbie's 98 Z28 gains 33 rwhp and 36 ft-lbs of torque after a JR Racing dyno tune! Only mods on this car are an air lid and headers/exhaust. Check out the dyno graph here...

Bill's C6 Z06 had some driveability issues but the JR Racing staff spent the necessary time to get all the part throttle tuning fixed. In addition to driving much better, it also put down 516 rwhp and 477 ft-lbs of torque! Mods include a cam and long tubes. Check out the dyno graph here...

Benny's 2005 C6 comes to JR Racing for a dyno tune and gains 26 rwhp and 20 ft-lbs of torque! Final numbers for this stock C6 (LS2) were 358 rwhp & 361 ft-lbs of torque. Check out the dyno graph here...

Corey's 99 Z28 hardtop was plagued with some driveability issues so he called on JR Racing for a street and dyno tune! With a very mild cam, Corey's Z28 put down 352 rwhp and 354 ft-lbs of torque. Check back soon as this Z will be getting more mods in the coming months! The dyno graph can be seen here...

Gary's 99 C5 FRC "Nemesis" gets a full street and dyno tune from JR Racing! This beast put down 615 rwhp and 637 ft-lbs of torque! Mods include heads, cam, nitrous, and the usual supporting bolt ons. We'll find out soon whether or not he has the most important mod--the "driver mod".

Keith's heads/cam/FAST 99 Z28 was another example of a car with stalling and driveability issues after having been tuned by another shop. JR Racing quickly fixed the issues and put it on the dyno for some impressive numbers. Dyno graph will be posted shortly...

Travis called on the JR Racing team to fix some stalling and driveability issues with his cammed 01 Z06. Not only were we able to fix those issues, but we managed to squeeze out a few more ponies on the dyno as well! Check out his dyno graph here...

Russ's 04 GTO already broke the 400 rwhp mark with the stock LS1 cam and just a set of AI heads (& supporting bolt ons)! Well now he decided to take it a step further and see what could be done with an LS6 cam. The result is stock driveability while putting down numbers indicative of a more radical setup! Despite uncovering some lifter issues on the 92k mile LS1, it still managed to put down 430 rwhp and 405 rwtq after our custom tune! Check back for some updated numbers with a fresh set of lifters, but that begs the question--will he keep the same heads or upgrade to a set of Trick Flow pieces ported by AI? Stay tuned...

Everett's beautiful Factory Five Cobra has a turbocharged 5.0L engine, but came to us with some serious issues with low boost, high intake temps, and mediocre power levels. The baseline dyno produced only 380 rwhp. After we got all the issues sorted out, we were pleasantly surprised as this Cobra was finally making some impressive numbers--how does 620 rwhp and 674 rwtq sound? Check out the dyno graph here...

Also, for more details and pictures of this beast, click here.

When we found out Greg was going to bring his 99 Z28 up from Charleston for us to tune, we couldn't wait to get it on the rollers and see what it put down! His 99 Z28 has a set of AI ported 241 heads, AI custom cam, and the usual supporting bolt ons such as long tube headers, air lid, etc. The results were strong, as expected with this setup. Check out the dyno video on the left. Hopefully Greg will keep us posted with drag strip results soon!

Spencer brought his beautiful 09 G8 GT to us for a custom dyno tune and picked up 25 rwhp! Mods include a cold air intake and a set of long tube headers. Final numbers were 365 rwhp and 383 rwtq, pretty impressive for a 4 door! Check out the dyno graph here...

When Josh's 2002 420+ rwhp cammed Z06 was no longer enough, he called on JR Racing to take care of his latest build. Modifications include a set of Patriot heads, FAST 90mm intake manifold, A&A blower cam, A&A Vortech T-trim kit with a 3.8 supercharger pulley, and methanol injection. As it turns out, this setup performed even better than we could have expected. And with a custom JR Racing tune, it has excellent street manners while putting down some astounding numbers on the dyno! Check out the video clip on the left to see this beast making a dyno pull. Click here to see the graph...