What should the timing be on a Mopar 340?
What should the timing be on a Mopar 340?
Timing should be at 33-35 deg BTDC at 3,000 RPM w/vacuum advance disconnected, then reconnect it. This should result in around 10-18 deg BTDC at idle. This is going to sound nuts but I am digging through an old manual and it is showing 5degrees advance for the 340 in a cuda or a dart sport either one.
When did Mopar change from forged to cast crankshaft?
The crankshaft was switched from forged to cast somewhere in the production cycle, believed to be in early April 1972, with engine 39118000 (thanks, Karl Thomas); a milder camshaft was used 1973 – The cast crank had a different number than the 1972 counterpart, because it was shot-peened for greater strength.
Why is the 340 engine a performance engine?
Simply because the 340 was designed from the outset as a performance engine. Look at the stats – high compression, big valves (2.02 intake, 1.60 exhaust), forged and shot-peened crank and rods, free flowing dual exhaust, dual plane intake manifolds and large 4 barrel carburetors. These engines were built to perform well and stay together doing it.
How big is the crankshaft on a 1969 GM hot rod?
The crankshaft is the large 2.1″ rod journal version and the rods have polished beams and use beefier 3/8″ bolts. Note GM prototype casting numbers with “0” prefix.
Timing should be at 33-35 deg BTDC at 3,000 RPM w/vacuum advance disconnected, then reconnect it. This should result in around 10-18 deg BTDC at idle. This is going to sound nuts but I am digging through an old manual and it is showing 5degrees advance for the 340 in a cuda or a dart sport either one.
Simply because the 340 was designed from the outset as a performance engine. Look at the stats – high compression, big valves (2.02 intake, 1.60 exhaust), forged and shot-peened crank and rods, free flowing dual exhaust, dual plane intake manifolds and large 4 barrel carburetors. These engines were built to perform well and stay together doing it.
What was the top speed of a 1969 340 Dart?
CAR and DRIVER called its ’68 340 Dart GTS (4 speed, 3.91:1 gears, 14.4 ET @ 99 mph) “a giant killer. In a 1969 test, HOT ROD Magazine got its 340, 4 speed Formula S ‘Cuda with 3.91:1gears to turn high-13’s.
What should the timing be on a 340 Duster?
Motor is in a 340 Duster, Edlebrock Air gap, Holley 750, Mild comp cam, factory X heads and headman headers car runs and starts great. Timing should be at 33-35 deg BTDC at 3,000 RPM w/vacuum advance disconnected, then reconnect it. This should result in around 10-18 deg BTDC at idle. Click to expand…
