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Grassroots Motorsports | Sports Car Magazine Welcome to the home of Grassroots Motorsports, the hardcore sports car magazine—and your home for car reviews, tips, and road racing news
Car forums | Grassroots Motorsports Welcome to the home of Grassroots Motorsports, the hardcore sports car magazine—and your home for car reviews, tips, and road racing news
T-Shirts – Grassroots Motorsports Project Car Short-Sleeve Unisex T-Shirt From $24 50 Project Car Toddler Short Sleeve Tee $14 50 Project Car Youth Tee $20 50 GRM Cooling Performance Long-Sleeve Tee $28 50 Sale 2025 Official $2000 Challenge T-Shirt From $24 50 $25 00 Challenger's Choice Bundle From $35 50 More Colors > '90s Vintage Basics Bundle From $49 50 More Colors > More
Grassroots Motorsports Store It takes gear to enjoy the Grassroots Motorsports lifestyle, whether that means sun protection at the autocross, a long-sleeve T-shirt for your next track day, or some stickers to show the world you haven't ruined your car without reason Every product in our store was added because a member of our staff wanted one for themselves, and we can't think of a much better endorsement than that
Determining ideal catalytic converter placement?| Grassroots . . . Determining ideal catalytic converter placement?What does the ECU have to do with the presence of a catalytic converter? The cat works on chemistry I used a 300 cell per inch Random Technology Metal Matrix core cat on my turbo RX7 Mounted in the stock location Worked well at getting rid of some of the nasty exhaust stench compared to an open exhaust Made no difference with regards to power
97 4 cylinder Z3. . . . PROS and CONS?| Grassroots Motorsports forum A local car dealership has a fairly nice '97 Z3 on their lot, and I would like to hear from folks the good and and bad (yeah, yet again sorry) of this sports car wanna-be The car in question has automatic (boo) and "leatherette" upholstery If it matters, mileage is 76K and color is cream with a camel tan interior
DIY Shock Dyno?| Grassroots Motorsports forum I'm surprised I'm not finding more info on the web about this, or how dodgy what little info I'm finding is Seriously, I think Hot Rod had an article about a "shock dyno" that involved dropping a weight on it and seeing how far it moved I had a cursory google for this having come up on GRM before and came up empty Like the title suggests, I'm curious about DIY shock dynos, and wonder
So. . . how are the C8 Z51 Corvettes holding up on track these days? The cars are phenomenal If you run a lot of track days and are fast, the clutch is a major weak point Good chance you'll burn it and or the trans itself Damn shame too because they are outstanding on the track