How GM racing does turbos
#1
Team Owner
Thread Starter
Member Since: Mar 2001
Location: Boston, Dallas, Detroit, SoCal, back to Boston MA
Posts: 30,610
Received 239 Likes
on
167 Posts
How GM racing does turbos
OK it's a drag car, but still pretty impressive!
http://www.speedtv.com/articles/life...omotive/38350/
http://www.speedtv.com/articles/life...omotive/38350/
The main highlights of our Chevy Cobalt would have to be the performance of the car. To date the car has been a 7.3et @ 198 MPH, during the NHRA event at Englishtown, NJ. The car is powered by a 4 cylinder ECOtec engine that creates 1400 hp @ 60 psi. The team has decided to run a GT 45 from Precision Turbo. In the near future, the Pro car has the potential of running 7.0 @ over 200 MPH.
#4
Melting Slicks
Member Since: Dec 1999
Location: Austin, TX
Posts: 2,813
Likes: 0
Received 0 Likes
on
0 Posts
I'm not into drag racing or FWD cars, but it's still pretty damn impressive!
It cracks me up that they still call it an "ecotech" motor when I'm sure there's nothing "eco" about it!
It cracks me up that they still call it an "ecotech" motor when I'm sure there's nothing "eco" about it!
#5
Melting Slicks
VEDDY INTERRESTING!!!
Just a couple of observations....
The went to the "Audi - Anteater" kind of layout to get some more weight ahead of the front wheels. Rear drive drag cars are built tall to get more weight transferred to the rear wheels. Front drivers are built low and try to get more weight forward to start with...
BIG TURBO with a big pressure ratio.... PR of around 4 bars is a pretty stout turbo...very cool
Just a couple of observations....
The went to the "Audi - Anteater" kind of layout to get some more weight ahead of the front wheels. Rear drive drag cars are built tall to get more weight transferred to the rear wheels. Front drivers are built low and try to get more weight forward to start with...
BIG TURBO with a big pressure ratio.... PR of around 4 bars is a pretty stout turbo...very cool
#6
Le Mans Master
FWD They are getting to be slingshot dragsters with two sets of wheelie bars and no front wheels. When will those kids grow up and take a physics class? I'm not faulting the guys that built it. You do what you need to for the best performance within the rules. It's just anyone who thinks FWD is the way to race really needs a basic dose of physics. That turbo is nearly as big as the engine, wow.
#7
Melting Slicks
FWD They are getting to be slingshot dragsters with two sets of wheelie bars and no front wheels. When will those kids grow up and take a physics class? I'm not faulting the guys that built it. You do what you need to for the best performance within the rules. It's just anyone who thinks FWD is the way to race really needs a basic dose of physics. That turbo is nearly as big as the engine, wow.
I remember when a AA/F slingshot called the Chizzler broke the 200 mph "barrier" in the 1/4 mile... That was a bid deal, and it was running around a 7 second run to do it.. Now we have front drivers going that fast, and real top fuel cars doing close to 350 mph in four and a half seconds.... F still equals MxA (at least it did the last time I looked), but what some of these cars are doing is still pretty amazing...
#8
Former Vendor
FWD They are getting to be slingshot dragsters with two sets of wheelie bars and no front wheels. When will those kids grow up and take a physics class? I'm not faulting the guys that built it. You do what you need to for the best performance within the rules. It's just anyone who thinks FWD is the way to race really needs a basic dose of physics. That turbo is nearly as big as the engine, wow.
Randy
PS The fastest think on our dyno was a 4 banger, 2.0 liters of fire I don't know the horsepower because it maxed it out before he started running high boost.
#9
Melting Slicks
GM did a fwd Camaro program in the late 70's and they learned a lot about high performance fwd. They ended up with a massively wide car that had huge front tires and about 60% of the weight on the front axle and as much rear roll stiffness as you could get. According to a friend of mine who did the dynamics on the car, it "handled", but the throttle off characteristics were downright "spooky"...
The bottom line was that if you want to have a high power/weight ratio fwd simply isn't a good idea.
#10
Former Vendor
Six great ways of going 200 mph. The people that build and go over the 200 mph know what they are doing.
http://www.youtube.com/watch?v=BeK_aFU0dYQ
http://www.youtube.com/watch?v=3umAtmclayE
http://www.youtube.com/watch?v=aRdA0pzxQ-M
http://www.youtube.com/watch?v=H7NknqfY0C8
http://www.youtube.com/watch?v=H7NknqfY0C8
http://www.youtube.com/watch?v=BeK_aFU0dYQ
http://www.youtube.com/watch?v=3umAtmclayE
http://www.youtube.com/watch?v=aRdA0pzxQ-M
http://www.youtube.com/watch?v=H7NknqfY0C8
http://www.youtube.com/watch?v=H7NknqfY0C8
#13
Team Owner
Thread Starter
Member Since: Mar 2001
Location: Boston, Dallas, Detroit, SoCal, back to Boston MA
Posts: 30,610
Received 239 Likes
on
167 Posts
http://www.youtube.com/watch?v=H7NknqfY0C8
That one is pretty cool!
That one is pretty cool!