Yes, this 327/365 runs real strong, thinks it's a ratmotor, and is not even "broken in " yet. It's got about 3 hours run time prior to rolling, and the odometer now reads 24 miles since the restoration.
Some of you might remember the threads, "Idle To Overheat", and "Thar She Blows" a couple months back, in which we discussed the possible ways of addressing this mouse's elevated temperature during prolonged periods of idling. I would like to keep you folks informed of the latest, and provide some food for thought for the likes of Duke, John H., Clem, and others who have contributed to the above discussions.
Here is what we have as of 10/7/02:
Ambient @ 78*F.
Fired engine cold- idled 45 min.- shutdown
Temp gauge at mark midway between 180 and 240 (calculated at 213 based on non linearity of gauge), which is actually 218, as measured with IR at thermostat housing. Needle was still slowly climbing at shutdown.
1. New DeWitts, belts, hoses, water pump. All "correct", numbers, etc., etc.
2. Rebuilt (by a "good man" most of us know) original fan clutch
3. 50/50 Zerex/H2O
3. 13# cap., correct from John Pir---
4. 6 qts Castrol 10W-40 motor oil
5. Bore is .020 over--journals are .010 under
6. 461 heads were cc'd, pocket ported, bowls opened, exhaust valve unshrouded
7. Engine built using all parts "as new", including domed pistons, 30-30 cam.
8. Actual CR calculated as 10.5 min. to 10.7max. (based on variances in chamber volume).
9. 236 vacuum can
10. Idle (hot) @ 900 RPM
11. Idle vacuum meas @ 15 in-hg --- needle very steady
12. Idle mixture screws backed out from 3/4 turn, to 1 1/2 turn (spec).
13. Static timing @ 10 BTDC.
14. Static + vac. advance @ idle meas. @ 27 BTDC.
15. Exhaust manifold temp., meas. with IR, at confluence of 2 center ports:525*F.
16. Heat riser approx. 1/2 open at idle. Spring is like a limp d--k, and blows open with any increase in exhaust pressure.
Still, the temp. continues to slowly climb if I let the beast idle for an extended period.
Can any of you with midyear smallblocks, claim that you can idle your motor INDEFINATELY without boilover! If such is the case, then I would very much appreciate your feedback. I am fairly certain that my engine/cooling system is operating within design parameters, and would appreciate any empirical evidence to the contrary.
Joe
Some of you might remember the threads, "Idle To Overheat", and "Thar She Blows" a couple months back, in which we discussed the possible ways of addressing this mouse's elevated temperature during prolonged periods of idling. I would like to keep you folks informed of the latest, and provide some food for thought for the likes of Duke, John H., Clem, and others who have contributed to the above discussions.
Here is what we have as of 10/7/02:
Ambient @ 78*F.
Fired engine cold- idled 45 min.- shutdown
Temp gauge at mark midway between 180 and 240 (calculated at 213 based on non linearity of gauge), which is actually 218, as measured with IR at thermostat housing. Needle was still slowly climbing at shutdown.
1. New DeWitts, belts, hoses, water pump. All "correct", numbers, etc., etc.
2. Rebuilt (by a "good man" most of us know) original fan clutch
3. 50/50 Zerex/H2O
3. 13# cap., correct from John Pir---
4. 6 qts Castrol 10W-40 motor oil
5. Bore is .020 over--journals are .010 under
6. 461 heads were cc'd, pocket ported, bowls opened, exhaust valve unshrouded
7. Engine built using all parts "as new", including domed pistons, 30-30 cam.
8. Actual CR calculated as 10.5 min. to 10.7max. (based on variances in chamber volume).
9. 236 vacuum can
10. Idle (hot) @ 900 RPM
11. Idle vacuum meas @ 15 in-hg --- needle very steady
12. Idle mixture screws backed out from 3/4 turn, to 1 1/2 turn (spec).
13. Static timing @ 10 BTDC.
14. Static + vac. advance @ idle meas. @ 27 BTDC.
15. Exhaust manifold temp., meas. with IR, at confluence of 2 center ports:525*F.
16. Heat riser approx. 1/2 open at idle. Spring is like a limp d--k, and blows open with any increase in exhaust pressure.
Still, the temp. continues to slowly climb if I let the beast idle for an extended period.
Can any of you with midyear smallblocks, claim that you can idle your motor INDEFINATELY without boilover! If such is the case, then I would very much appreciate your feedback. I am fairly certain that my engine/cooling system is operating within design parameters, and would appreciate any empirical evidence to the contrary.
Joe
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