•WEIGHTS / TURBO LIMITS: All weight penalties will be added up to the point of the chassis weight limitation. All 6 Cylinder cars built after 01-01-05 must meet SFI 25.2 chassis specifications if they plan on running Twin turbos in competition. 4 Cylinder class min. is 1800lbs, .80 lbs per CC of displacement for all 4 Cylinder cars or 2.599L and smaller engines, 2.600L and larger class minimum of 2800lbs. Example: 2.0L = 1800 lbs. (1800lb. min.) 2.5L = 2000 lbs. 2.6L = 2800 lbs. (1 power adder only) 3.0L = 3000 lbs. (2 power adders /gasoline only) Twin turbo add 200lbs penalty. Twin Turbo counts as only one power adder. Air-cooled: 1800 lbs. 2 Rotor: 1900 lbs. with up to two-power adders. 3 Rotor: 2400 lbs. with up to two power adders. Add 200 lbs. For ecotec, and cosworth engines. Add 200 lbs for missing functional shock towers, or missing front frame rails. 4 Cylinder Turbo maximum size is 81 mm. 6 Cylinder single Turbo maximum size 74 mm. 6 Cylinder dual Turbo maximum size 58 mm each.
4 Cylinder Maximum Turbo size = 81mm, single turbo only. Max size is defined by inducer wheel size measurements. Maximum compressor inducer diameter is 81.81mm. This is measured at the point where the leading edge of the compressor wheel meets the housing. Inducer diameter can be no larger than this. No stepped inducer wheels allowed. The contour from inducer to exducer must be continuous with no steps. 6 Cylinder Maximum Turbo size = 74mm, single turbo only. Max size is defined by inducer wheel size measurements. Maximum compressor inducer diameter is 75.85mm. This is measured at the point where the leading edge of the compressor wheel meets the housing. Inducer diameter can be no larger than this. No stepped inducer wheels allowed. The contour from inducer to exducer must be continuous with no steps. Exhaust housing flange cannot measure more than 69.85mm x 82.55mm on the bolt pattern. 6 Cylinder Twin Turbo Maximum Turbo size = 58mm turbo. Max size is defined by inducer wheel size measurements. Maximum compressor inducer diameter is 59.78mm. This is measured at the point where the leading edge of the compressor wheel meets the housing. Inducer diameter can be no larger than this. No stepped inducer wheels allowed. The contour from inducer to exducer must be continuous with no steps. Exhaust housing flange cannot measure more than 69.85mm x 82.55mm on the bolt pattern.
looks like revisions… which i dont have.
…so u can copy/paste. now use your noggin to make practical sence out of it…
edit after i actually read it: still the car is lighter, has better weight distribution, and is allowed a bigger turbo. …what is the arguement again?
system
July 24, 2005, 12:10pm
22
gearhead:
looks like revisions… which i dont have.
…so u can copy/paste. now use your noggin to make practical sence out of it…
edit after i actually read it: still the car is lighter, has better weight distribution, and is allowed a bigger turbo. …what is the arguement again?
I just posted for general knowledge but power to weight is still close to what the others make since they are all in the 7.1-7.3 range
That’s awesome but GM was still the first to crack 200mph in a 4 cylinder with the ECOTEC.
…and this guy did in a FWD :bowdown:
http://www.gm.com/company/gmtunersource/html/rs_drag_pro.htm
yea but thats what happens when you have a company that can throw a couple million dollars into a car all at once.
brent rau owns his own company and funds everything “out of his pocket” so to speak…
system
July 25, 2005, 1:55pm
25
wow 7.8 or what ever at 200mph or 7.1@193mph what would you rather have
Either would be fine with me. Not knocking the well proven 2 litre. I just like the fact that an American badged 4 cylinder is finally doing something worth while.
7.53@202mph fwd impresses me as much as 7.1@193 rwd.
No matter who’s putting money where it’s a step forward for GM in a time when they are in such sad shape.
Shaggy
July 25, 2005, 4:56pm
28
I didnt know Pepsi sponserd 2 liter racing :dunno:
:gives:
when you get those little faggot 4-bangers running in the 4’s like the v8’s i’ll care, until then, it’s slow as balls.
system
July 26, 2005, 6:52am
31
ritalin:
I forgot you run 4’s.
I also forgot that the cars that run 4’s are way lighter.
an import will be in mid 5’s by seasons end. mark my words
How’s that going to happen. They’re only at mid 6s right now.
system
July 26, 2005, 1:21pm
33
HOLY HELL,… thats frickin cool
Heres another quick 2 liter dsm
http://www.dsmtimes.org/shepherd/8.55@176.9.mpg
John Shepherd, Retains entire stock unibody with all stock body panels (except hood), all factory glass, aluminum rod motor built by dave buschur of buschur racing, and a custom built shepracing (yeah thats him for those who dont know) transmission. his best time is 8.4 @ 179, but you get the idea.