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2 weeks ago | 
grassrootsmotorsports.com | Colin Wood |Keith Tanner
Normally, when “investment firm” and “race track” appear in the same sentence, it’s because another venue is getting leveled in favor of a housing development or a strip mall or wherever else the cool kids hang out these days. So consider us worried when news broke that CrossHarbor Capital Partners, an investment firm, had acquired the iconic Willow Springs International Raceway.
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3 weeks ago | 
grassrootsmotorsports.com | Paris Van Gorder |Keith Tanner
By Paris Van Gorder Apr 2, 2025 | $2000 Challenge | Posted in Features | Never miss an article “I don’t think I had done an oil change when I started this build,” admits Derek Penner, builder of this unlikely mashup between a Volkswagen Beetle and a Mazda Miata.
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1 month ago | 
grassrootsmotorsports.com | JG Pasterjak |Keith Tanner
Update by J.G. Pasterjak to the BMW 435i project car Mar 17, 2025 | BMW, BMW 435i Photography by J.G. Pasterjak For a car that usually operates at 12-15 psi of turbo boost, 0-3 psi wasn’t doing our BMW 435i any favors on track. One good thing about a large, catastrophic boost leak like this: It should be fairly easy to locate. [What’s causing our BMW 435i’s boost problems?]A few other assumptions would also guide our search.
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2 months ago | 
grassrootsmotorsports.com | Keith Tanner |JG Pasterjak
Update by J.G. Pasterjak to the BMW 435i project car Jan 28, 2025 | BMW, BimmerWorld, BMW 435i Photography Credit: Tradd Slayton/Racing for ALS During the second week of January, we passed the one-year mark wince we brought home our 2015 BMW 435i project car. And while we’ve detailed the performance modifications we’ve done, we haven’t talked that much about the more mundane tasks of simply maintaining the car for daily use.
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Sep 17, 2024 | 
grassrootsmotorsports.com | Coniglio Rampante |Chris Tropea |Keith Tanner |Colin Wood
By Staff Writer Sep 17, 2024 | Mazda, Miata, Sponsored Content, Lime Rock Park, MiataCon | Posted in News and Notes | Never miss an article Photography Courtesy Lime Rock Park Coming soon: this fall’s big East Coast Miata event. Connecticut’s Lime Rock Park will hold its second annual MiataCon on October 25-26.
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Sep 8, 2024 | 
grassrootsmotorsports.com | Keith Tanner
[Editor's Note: This article originally appeared in the December 2019 issue of Grassroots Motorsports. Prices have been left as they originally appeared in print.]Does more money equal better results? Yes. No. Maybe. More likely, the answer is the usual: It depends. Take a suspension setup. Today’s market offers the full range of options, from simple, comfortable upgrades to hardcore, race-spec hardware. Do you need to jump to the head of the line in order to get good equipment? Once again, it depends.
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Jul 21, 2024 | 
grassrootsmotorsports.com | Keith Tanner
In the continuing quest for performance, eventually you’ll hit physical or digital barriers separating your car from that next level. When it comes to the physical barriers, those are usually pretty cut and dried: Piston engines are air pumps, ultimately, so installing those exhaust headers and an intake that increases pumping efficiency are straightforward decisions.
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Jul 7, 2024 | 
grassrootsmotorsports.com | Keith Tanner
Looking to make your car faster? Don’t underestimate the power of suspension upgrades. Most people take their suspension cues from fellow enthusiasts–buddies or message board gurus who own a similar car. Peer acceptance of a parts combination can be quite reassuring, but can these formulas really be trusted? Despite the hype and online chatter, sometimes you need a methodical investigation into the facts. Let’s explore some common suspension problems and how to achieve the best results.
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Jun 24, 2024 | 
grassrootsmotorsports.com | Keith Tanner
What’s your local autocross site? A mall parking lot? Kart track? Airport runway? Among the options here in the northeast part of Florida: The Florida International Rally & Motorsport Park, the facility also known as the FIRM–and also GRM’s official test track. [The Grassroots Motorsports ultimate guide to track car lap times]Throw down some cones and, suddenly, the track becomes a fast, flowing autocross course–with some elevation changes, blind turns and a few 90-degree bends.
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Jun 12, 2024 | 
grassrootsmotorsports.com | Keith Tanner
Update by Tim Suddard to the Ford Mustang Fastback project car Jun 12, 2024 | Mustang, Vintage Racing, gauges, Prosport Performance Gotta know what’s going on under the hood, right? So when we first prepped our 1965 Mustang vintage racer, we decided to explore the Prosport Performance catalog as this company offers a wide range of gauges suitable for both race and street.
