OLD Modified Corvettes

randy wilson · 12-19-2013, 12:14 PM

Ok, Here goes. CLASS: ECONO MOD
81 and older cars. No front wheel drive conversions.
9 lbs. per C.I.D.
Min. wt. 3,000 lbs.
Max. 1 750 cfm carb. Choke horn must remain. Baseplate standard 750.
Ford, Mopar, and GM only. Brodix spec head. Only mods allowed angle milling, and polishing combustion chamber. 11\32 valve min. 2.08 max. Titanium allowed.
Cast intake generally available. No external mods. Max 2" spacer.
Any piston, any rod, any crank, any ring package, any bore, any stroke.
No vac pumps, external oil pumps, belt drives, or internal billet pumps allowed.
No computers allowed.
No titanium, or carbon fiber driveline parts allowed, except carbon fiber drive shaft for safety reasons.
Max. 1 clutch disc, no smaller then 10.5 inch. No counter wts. allowed.
Max. primary tube size on header 2". No more then 2 steps on header.
Motor plates allowed.
Cool can allowed.
SpecC-12 VP fuel
Cam lift .750 max at the valve.
Stud mount rockers only, except Mopar.
14.32 max tire size.
Wheelie wheels permitted.
Max
RPM chip allowed. No other chips allowed.
Play back tach allowed.
Maximum 5 forward gears. CLUTCH MUST BE USED IN ALL 5 GEARS IN THE TRUE CONVENTIONAL MANNER.
Removable tunnel allowed.
No more then 50\50 wt transfer.
.4 pro tree only.
Cam must be in stock location, remain stock diameter for engine used.
Lifters must be stock diameter. Roller cams, and lifters allowed.
Any radiator in stock location.
Engine in stock location, plus, or minus 1"
Distributor must remain in stock location.
Crank trigger allowed.
Any head under suspicion must be sent to Brodix, and $500 fee put up for the expense of protested.
After market balancers required. Min, 8 pt cage. (up to NHRA)
1" site plug required in oil pan to inspect pump.
.Autos remove 100 lbs. Must still maintain min wt.

12-19-2013, 12:14 PM	#11
randy wilson Senior Member Join Date: Jan 2007 Location: N/A Posts: 882 Likes: 0 Liked 22 Times in 22 Posts	Re: OLD Modified Corvettes Ok, Here goes. CLASS: ECONO MOD 81 and older cars. No front wheel drive conversions. 9 lbs. per C.I.D. Min. wt. 3,000 lbs. Max. 1 750 cfm carb. Choke horn must remain. Baseplate standard 750. Ford, Mopar, and GM only. Brodix spec head. Only mods allowed angle milling, and polishing combustion chamber. 11\32 valve min. 2.08 max. Titanium allowed. Cast intake generally available. No external mods. Max 2" spacer. Any piston, any rod, any crank, any ring package, any bore, any stroke. No vac pumps, external oil pumps, belt drives, or internal billet pumps allowed. No computers allowed. No titanium, or carbon fiber driveline parts allowed, except carbon fiber drive shaft for safety reasons. Max. 1 clutch disc, no smaller then 10.5 inch. No counter wts. allowed. Max. primary tube size on header 2". No more then 2 steps on header. Motor plates allowed. Cool can allowed. SpecC-12 VP fuel Cam lift .750 max at the valve. Stud mount rockers only, except Mopar. 14.32 max tire size. Wheelie wheels permitted. Max RPM chip allowed. No other chips allowed. Play back tach allowed. Maximum 5 forward gears. CLUTCH MUST BE USED IN ALL 5 GEARS IN THE TRUE CONVENTIONAL MANNER. Removable tunnel allowed. No more then 50\50 wt transfer. .4 pro tree only. Cam must be in stock location, remain stock diameter for engine used. Lifters must be stock diameter. Roller cams, and lifters allowed. Any radiator in stock location. Engine in stock location, plus, or minus 1" Distributor must remain in stock location. Crank trigger allowed. Any head under suspicion must be sent to Brodix, and $500 fee put up for the expense of protested. After market balancers required. Min, 8 pt cage. (up to NHRA) 1" site plug required in oil pan to inspect pump. .Autos remove 100 lbs. Must still maintain min wt. __________________ don,t have one Last edited by randy wilson; 12-19-2013 at 12:16 PM.