Pure Stock
03-10-2008, 12:43 PM
I had this saved in my favorites for some time. Great reference material! This is the greatest peak torque production I've ever come across for a 306c.i.d. Also note worthy is the cc of the intake runners. at 205 cc this example has no problem with torque production in the lower rpm ranges (300 lbs. RWTQ from 2,800 to 6,800 rpm.
Dyno results:
401 rwhp @ 6000(-6200)rpm, and 382 tq @ 5000. The hp is above 300 from 4400 up, and 390+ from 5800 to 6800(where I cut it off). The tq is above 300 from 2800 to 6800, and over 350 from 4400 to 6000. This is on 93 octane pump gas, with a cr of around 11.0:1.
Combination:
I am using the factory '93 block with a DSS girdle, an Eagle crank and H-beam rods, and Ross pistons(shelf stock, not custom). The machining was just the standard cleanup, nothing exotic was done(vibration, coatings, thermal treatment, etc.). The rotating assembly was balanced using a 28oz imbalance(wrong crank was shipped and he made it work) I hand fitted my JE rings.
Hardware throughout is ARP, main studs, rod bolts, head studs, intake bolts, and valve cover studs. I use Mr. Gasket header studs, because the ARP price on those is insane.
The cam is an FTI custom, and the specs are .601"/.576" lift; 288*/289* advertized duration; 234*/240* duration @ .050 lift, and 110* lobe seperation
The heads are TEA Stage III Renegade Twisted Wedges with 205cc intake volume, 50cc chambers, and the spring pressures are somewhere around 145 on the seat at a 1.80" installed height. I use CompCams Titanuim retainers, and Pro Magnum 1.6:1 roller rockers(7/16" stud mount).
The Holley intake is also TEA's full Renegade port job, with #s 1 and 5 welded to straighten them out, and a 3/8" phenolic spacer to straighten the transition between upper and lower intakes. I use an Accufab 75mm t/b, a Pro-M 77 meter, and a homemade inlet tube. I have #30 FMS injectors and a Paxton regulator. I use the factory distributor and an MSD 6A. The battery is still mounted under the hood, and I use a 3 core copper/brass radiator.
The exhaust is Bassani 1 3/4"to 1 7/8" stepped headers with 3" collectors, a Dr. Gas X-pipe, and Dynomax Race Magnum Welded mufflers exiting under the car.
I am using a steel Centerforce flywheel, a FMS pressure plate, and a Centerforce D/F disk. The factory T-5 still lives under there, and I have a FMS aluminum driveshaft linked to a FMS 31 spline differential and 4.30 gears, driving 31 spline Strange axles and C-clip eliminators.
I tune with a PMS.
Dyno results:
401 rwhp @ 6000(-6200)rpm, and 382 tq @ 5000. The hp is above 300 from 4400 up, and 390+ from 5800 to 6800(where I cut it off). The tq is above 300 from 2800 to 6800, and over 350 from 4400 to 6000. This is on 93 octane pump gas, with a cr of around 11.0:1.
Combination:
I am using the factory '93 block with a DSS girdle, an Eagle crank and H-beam rods, and Ross pistons(shelf stock, not custom). The machining was just the standard cleanup, nothing exotic was done(vibration, coatings, thermal treatment, etc.). The rotating assembly was balanced using a 28oz imbalance(wrong crank was shipped and he made it work) I hand fitted my JE rings.
Hardware throughout is ARP, main studs, rod bolts, head studs, intake bolts, and valve cover studs. I use Mr. Gasket header studs, because the ARP price on those is insane.
The cam is an FTI custom, and the specs are .601"/.576" lift; 288*/289* advertized duration; 234*/240* duration @ .050 lift, and 110* lobe seperation
The heads are TEA Stage III Renegade Twisted Wedges with 205cc intake volume, 50cc chambers, and the spring pressures are somewhere around 145 on the seat at a 1.80" installed height. I use CompCams Titanuim retainers, and Pro Magnum 1.6:1 roller rockers(7/16" stud mount).
The Holley intake is also TEA's full Renegade port job, with #s 1 and 5 welded to straighten them out, and a 3/8" phenolic spacer to straighten the transition between upper and lower intakes. I use an Accufab 75mm t/b, a Pro-M 77 meter, and a homemade inlet tube. I have #30 FMS injectors and a Paxton regulator. I use the factory distributor and an MSD 6A. The battery is still mounted under the hood, and I use a 3 core copper/brass radiator.
The exhaust is Bassani 1 3/4"to 1 7/8" stepped headers with 3" collectors, a Dr. Gas X-pipe, and Dynomax Race Magnum Welded mufflers exiting under the car.
I am using a steel Centerforce flywheel, a FMS pressure plate, and a Centerforce D/F disk. The factory T-5 still lives under there, and I have a FMS aluminum driveshaft linked to a FMS 31 spline differential and 4.30 gears, driving 31 spline Strange axles and C-clip eliminators.
I tune with a PMS.