♪♪
[ ENGINE REVS ]
SO, THIS IS A CHASSIS DYNAMOMETER.
A DYNAMOMETER LITERALLY JUST MEASURES POWER OUTPUT.
SO IT'S LIKE A TREADMILL FOR A CAR.
SO WHAT WE'RE GONNA BE DOING TODAY IS DIALING IN
THE FUEL AND IGNITION WITH OUR ENGINE-CONTROL COMPUTER.
SINCE THIS IS A NEW-TO-US ENGINE,
WE'VE GOT TO, YOU KNOW, COMPLETELY CUSTOMIZE IT
ON THE ENGINE-CONTROL COMPUTER.
SO WE'RE GONNA PUT IT ON THE ROLLERS, SEE WHAT IT LIKES,
SEE WHAT'S GONNA MAKE THE MOST POWER RELIABLY,
AND GET IT DIALED IN AND WE'LL BE READY TO GO.
WE'RE MEASURING THE POWER OUTPUT TO SEE, LIKE,
THE CHANGES THAT I MAKE, HOW THE CAR RESPONDS TO IT.
-WHAT'S GOING ON? -IT'S GOOD.
-JASON. -KEVIN.
GOOD TO MEET YOU.
-I -- YEAH. -YEAH.
[ LAUGHTER ]
I RAN A DYNO FOR THE PAST EIGHT YEARS
IN PHOENIX, SO I KNOW WHAT THE FILTH IS ALL ABOUT.
[ LAUGHS ]
Producer: WHAT'S YOUR BEST GUESS
ON HORSEPOWER HERE?
I DON'T KNOW. I MEAN, IT'S GOT STOCK CAMS IN IT.
IT DOES HAVE A LITTLE BIT MORE COMPRESSION,
BUT I HAVE NO IDEA ON THE HISTORY OF THE MOTOR
OR WHO BUILT IT, SO I'M JUST GONNA TRY TO,
YOU KNOW, GIVE IT WHAT IT WANTS AND MAKE IT HEALTHY.
ANYTHING ABOUT 150 HORSEPOWER, THAT'S PROBABLY ENOUGH
TO GO SIDEWAYS ON DIRT, SO...
[ INDISTINCT CONVERSATIONS ]
UM, I MEAN, I THINK IF IT MAKES 160,
AARON WILL BE PRETTY DISAPPOINTED.
THEN AGAIN, IT IS WHAT IT IS.
I LOOKED UP SOME DYNOS FOR SIMILAR CARS.
YEAH. IT'S -- THAT'S ABOUT THE POWER.
IT'S AN NA 2.5-LITER. IT'S A LITTLE TINY --
I GOT TO SEE IF I CAN FIT MY HIPS IN
AN AARON-SIZED SPOT.
-THESE HIPS DON'T LIE. -[ CHUCKLES ]
-THESE HIPS DON'T SHRINK. -YEAH.
[ ENGINE STARTS ]
YOU READY FOR SOME PULLS?
HERE GOES THE PULLS. I'M GONNA WATCH FOR DENOTATION.
♪♪
[ ENGINE REVS ]
♪♪
READY?
[ ENGINE REVS ]
♪♪
[ ENGINE DIES DOWN ]
♪♪
100 AND 100. 100 AND 114.
MEH.
[ ENGINE TURNS OFF ] ALL RIGHT, I'M GONNA LET
ME AND THE CAR COOL OFF JUST A LITTLE BIT.
ALL RIGHT, YEAH.
'CAUSE THE LAST THING I WANT TO DO IS, LIKE,
GET GREEDY.
YEAH, RIGHT OFF THE BAT.
[ GROANS ] YEAH, I'D RATHER SNEAK UP ON IT.
UH-HUH.
WHOA, NELLY.
THERE WE GO.
THE MOTOR'S GIVING YOU GOOD SIGNS, THOUGH?
IT'S NOT KNOCKING THE SPRINGS OUT?
OH, NO, IT'S NOT --
MOTOR DOESN'T CARE.
IT'S ALL STILL --
Man: WHAT ARE THE READINGS TELLING US?
WELL, THESE READINGS RIGHT HERE ARE PRETTY MUCH JUNK.
YEAH, WE GOT TO GET THE DYNO SYNCHED UP AGAIN,
BUT I'M JUST STARTING REALLY SOFT AND SNEAKING UP ON IT,
MAKE SURE ITS HEALTHY, AND THAT IT PULLS THROUGH CLEANLY,
AND I'M GETTING...
BASICALLY, WE'RE MODELLING -- WE'RE MODELLING AIR FLOW
THROUGH THE ENGINE.
SO WHAT I'M DOING IS GETTING THAT MODEL DIALED FIRST,
AND THEN I'LL EXPERIMENT WITH CHANGES
TO THE AIR/FUEL RATIO AND THE TIMING,
AND THAT'S WHAT THE POWER'S GONNA COME FROM.
SO RIGHT NOW, WE'RE MAKING SURE
THAT THE WAY I'VE MODELLED THE ENGINE IN THE SOFTER
IS ACCURATE. THAT'S WHAT I'M VERIFYING NOW.
SO, POWER OUTPUT RIGHT NOW IS PRETTY SECONDARY.
WE'RE 100 HORSEPOWER RIGHT NOW OFF OF WHAT WAS
WHAT AARON'S HOPING FOR.
[ ENGINE REVS ]
♪♪
-NASTY VIBRATION. -IT LOOKS LIKE IT.
LOOKS LIKE IT.
[ INDISTINCTLY TALKING ]
WHAT THE HELL IS THE MEAN VIBRATION, THOUGH?
IT COULD BE THESE TIRES,
BUT DID IT FEEL A BIT MORE LIKE DRIVESHAFT VIBRATION?
Aaron: I WAS AFRAID TO STAY IN IT.
I MEAN, I TRIED TO STAY IN TO THE END OF THE PULL
TO THAT THAT UP, BUT IT FELT REAL SKETCHY.
YEAH. IT LOOKED REAL SKETCHY.
THE TRUNK -- THE TRUNK WAS SHAKING LIKE CRAZY.
YEAH, SO, I CAN COMPARE PULLS.
THE SCALING JUST DOESN'T MATTER.
I CAN JUST DO A COUPLE PULLS IN SECOND GEAR.
-YEAH, THAT'S FINE. -AND DIAL IN FUEL
AND SEE WHAT MAKES AN IMPROVEMENT.
AND THEN WE'LL CALL THAT DONE.
THAT WAY WE'RE NOT DEALING WITH ALL THE CRAZY RPM.
-SOUNDS GOOD TO ME -ALL RIGHT.
I LIKE THAT.
WE HAVE SOME VIBRATIONS. I THINK IT'S THE TIRES.
THESE TIRES ARE -- THEY'RE SO -- HEAVY SIDEWALL.
THEY'RE A HEAVY TIRE.
THERE'S A LOT OF ROTATING MASS GOING ON WITH THESE THINGS.
I THINK IT'S JUST -- IT'S JUST THE NATURE
OF THESE TIRES TO SHAKE, BECAUSE THEY'RE SO BIG,
AND THEY'RE NOT MADE FOR THE STREET.
THESE ARE SPECIFIC RALLY TIRES FOR GRAVEL.
AND AT THE SPEEDS THAT IT WAS VIBRATING AT
WAS, LIKE, WELL OVER 100 MILES AN HOUR.
SO, UH, YES, AARON WILL PROBABLY HIT THAT,
BUT ON DIRT, IT'S WAY DIFFERENT
THAN IT IS ON STEEL LITTLE ROLLERS.
WE'RE GONNA DO A COUPLE SECOND-GEAR PULLS
AND JUST KIND OF DIAL THE REST OF THE FUEL IN RIGHT NOW.
I THINK WE MADE -- WHAT DID WE MAKE, 131, 150?
Aaron: 130 AND 146.
YEAH, SO, 130 HORSE AND 150 FOOT-POUNDS.
READY?
[ ENGINE IDLING ]
[ ENGINE REVS ]
OKAY, THERE WE GO.
IT PROBABLY HITS 160, 170,
SO, NOT FAR OFF FROM WHERE WE WERE THINKING.
THINK WE'RE ABOUT THERE, HONESTLY.
-YOU DONE-ZO? -I THINK SO.
-OKAY. -WE'LL CALL THAT.
ULTIMATELY, IT IS -- IT'S NOT LEAKING ANY FLUIDS,
THE CAR RUNS VERY... UH, IT RUNS SUPER SMOOTH.
THE TRANSMISSION SEEMED TO SHIFT FINE.
BRAKES WORK.
ALL THE LIGHTS WORK, ALL THE SYSTEMS WORK,
SO I DON'T SEE THERE BEING ANY REASON
WHY AARON COULDN'T TAKE IT "A," ON FRIDAY TO RALLY READY,
AND THEN "B," IF HE DOESN'T HIT A TREE IN RALLY READY,
THEN I THINK IT'LL JUST BE COME BACK,
RECHECK A COUPLE THINGS,
WASH THE CAR, LOAD IT IN THE TRAILER,
AND GET ON THE ROAD.
IT MAKES ALL THE RIGHT NOISES. IT DOES ALL THE RIGHT STUFF.
♪♪
-IT'S NICE THAT IT IDLES. -YEAH.
ALL RIGHT.
♪♪