I have a 68 Cougar with a 390 (X Code - 2bbl) FE engine. According to the previous owner, it has the following:
3500 miles on the rebuild
.040 overbore and about 10:1 forged pistons
GT or RV cam (he can't recall the specs)
balanced crank
mildly ported/relieved heads
interceptor valve springs
double roller timing chain
Edelbrock RPM Performer intake
Demon 750 'Race Demon' carb
MSD Ignition with MSD Distributor
stock exhaust manifolds with 2 1/2 in pipes through Flowmaster mufflers
I have to admit it doesn't run so good. I reset the timing from 12 to 18 degrees BTDC and it improved a bit. There is no vacuum advance to disconnect.
Does it seem normal? Is there any way to get a better handle on the cam specs? Considering the lack of real rumble in the idle I figure the cam has to be fairly mild.
It hesitates with anything other than a mild acceleration. Even then it seems to run rough until it idles for a few seconds and then settles down again. On hard acceleration it gags and coughs.
Doesn't it sound like there is too much carburator for the engine? Anyone have suggestions?
Thanks...
3500 miles on the rebuild
.040 overbore and about 10:1 forged pistons
GT or RV cam (he can't recall the specs)
balanced crank
mildly ported/relieved heads
interceptor valve springs
double roller timing chain
Edelbrock RPM Performer intake
Demon 750 'Race Demon' carb
MSD Ignition with MSD Distributor
stock exhaust manifolds with 2 1/2 in pipes through Flowmaster mufflers
I have to admit it doesn't run so good. I reset the timing from 12 to 18 degrees BTDC and it improved a bit. There is no vacuum advance to disconnect.
Does it seem normal? Is there any way to get a better handle on the cam specs? Considering the lack of real rumble in the idle I figure the cam has to be fairly mild.
It hesitates with anything other than a mild acceleration. Even then it seems to run rough until it idles for a few seconds and then settles down again. On hard acceleration it gags and coughs.
Doesn't it sound like there is too much carburator for the engine? Anyone have suggestions?
Thanks...