Hopping up the 500 Cadillac
Crashfarmer (Talk | contribs) |
Crashfarmer (Talk | contribs) |
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#The MTS is worth 50 ft lbs torque and 50 horsepower at 5000 rpm over the Edlebrock. | #The MTS is worth 50 ft lbs torque and 50 horsepower at 5000 rpm over the Edlebrock. | ||
#The factory type Q-jet works good on the Edlebrock. It does NOT seem to work very well on the single plane even with rejetting. Reversion from the huge secondary’s on the single plane may be the problem. | #The factory type Q-jet works good on the Edlebrock. It does NOT seem to work very well on the single plane even with rejetting. Reversion from the huge secondary’s on the single plane may be the problem. | ||
| − | #Multiple sizes and types of carburetors were tried. Best torque and horsepower with the large chamber heads was with an out-of-the box 750 Holley. Best by 20 horsepower. The large chamber heads flowed only 710 cfm MAX measured through the | + | #Multiple sizes and types of carburetors were tried. Best torque and horsepower with the large chamber heads was with an out-of-the box 750 Holley. Best by 20 horsepower. The large chamber heads flowed only 710 cfm MAX measured through the carburetor at 5200 rpm under load on the Dyno. Larger carbs up to 1000 cfm were tried and ALL LOST horsepower & torque. |
#The long stroke Cadillac whether 4.300 stock or 4.600 stroker need plenty of cam. Several cams have been tried.For any type of performance use a minimum of 234-244 @.050 tappet rise with as much lift as you can get works well. This cam will peak at 5100 rpm but still have good torque at 3000 rpm. With really good heads, add 10 degrees or 244-254 duration. Stock heads & stock valves only need about 220-230 duration. Anything bigger will not flow any more air because of head flow limits. | #The long stroke Cadillac whether 4.300 stock or 4.600 stroker need plenty of cam. Several cams have been tried.For any type of performance use a minimum of 234-244 @.050 tappet rise with as much lift as you can get works well. This cam will peak at 5100 rpm but still have good torque at 3000 rpm. With really good heads, add 10 degrees or 244-254 duration. Stock heads & stock valves only need about 220-230 duration. Anything bigger will not flow any more air because of head flow limits. | ||
#Engine SIZE DOES NOT AFFECT HORSEPOWER. Engine size DOES affect TORQUE. SHOCKING as this sounds, A 350 cubic inch engine with good flowing heads will out horsepower a 550 cubic inch engine with poor flowing heads. The 550 will out torque the 350 at low to mid RPM. TORQUE is what makes the car go. The Cadillac has POOR FLOWING HEADS so you have to Maximize Torque and help the horsepower under 5000 rpm. This is why the Cadillac is GENERALLY limited to not exceed 5000 RPM. | #Engine SIZE DOES NOT AFFECT HORSEPOWER. Engine size DOES affect TORQUE. SHOCKING as this sounds, A 350 cubic inch engine with good flowing heads will out horsepower a 550 cubic inch engine with poor flowing heads. The 550 will out torque the 350 at low to mid RPM. TORQUE is what makes the car go. The Cadillac has POOR FLOWING HEADS so you have to Maximize Torque and help the horsepower under 5000 rpm. This is why the Cadillac is GENERALLY limited to not exceed 5000 RPM. | ||
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