We put the G82 M4 CSL on the dyno to find out just how powerful BMW’s ultimate M4 really is — and compared it directly to a G80 M3 RWD. Both cars, both S58-powered, but how much difference is there in ...

With an official output of 1068 horsepower and a top speed of over 230 miles per hour, the new C8-generation Chevrolet Corvette ZR1 is a truly ridiculous machine on paper. (And, as we found during our ...

Real-World Showdown: We put Don Hicks' Ford 393-Cleveland Stroker Motor to the Test on Westech Performance's Engine and Chassis Dynos. The Results May Surprise You. How much power do you lose through ...

Another turbocharged BMW M performance car has hit the road, and you know what that means: another chance for a dyno test to show that BMW's official numbers significantly understate the level of ...

Westech Performance dyno tests a 555-inch stroker Ford Performance big-block engine with 13:1 compression and twin Dominator carbs!

A one-owner, 10,000-mile 1970 Hemi ’Cuda survivor reveals the real truth behind Chrysler’s legendary 426 R-Code Hemi after a bone-stock rebuild and modern dyno test.

Hennessey Performance dyno tested the C8 Corvette ZR1 and recorded 1,050 hp, a figure that appears to contradict its 1,064-hp factory crank rating. Automakers typically advertise crank horsepower, ...

Unless you can get your hands on one of the ultra-rare suicide-door examples, the tenth-generation Lincoln Continental was never a particularly cool car. Heck, even with the suicide doors, it's really ...

A dyno test showed dangerously low oil levels can produce a 10 percent horsepower bump in an LS V8—for one run, at least. It’s Sunday, Sunday, Sunday, and do I have an offer for you! No, it’s not ...

Dyno tested budget 383 Small-Block Chevy looks stock but hides stroker performance If you want budget-friendly power for your Chevy or other hot rod project then it’s hard to beat the time-tested ...