dawnovsky
Well-known member
Hi,
i am still havin a bit of a hard time in getting my engine to work properly.
i have remove the cylinders head recently to change the cam after i have found camshaft was damaged.
when i fisrt installed the head a few months ago, i get perfect vacuum immediatly.
since i have change the cam (i don(t know if it is cam related or not for now) i only get vacuum reading of about 13-14.
accordingly, advance have to be pushed further to get engine to work properly on idle.
compression test (dry n cold) show correct value between 135 and 150 psi (read cold, dry, wot, after 4 compression cycle).
i have track down few vacuum leaks already, and carburator , adaptor plate, and intake manifold gaskets are new.
PVC valve is connected at carb base plate port, and advance and tranny vacuum lines are connected at the vacuum port of the intake manifold ( cylinder 6 intake) of the stock 250-2v intake manifold.
there is still a tinny leak between the tranmission modulator and solid tranny vacuum line, but really something minor i ll try to have fix asap;
i don't now where to investigate now.
the cam is said to be a 264/110 from claysmith.
lifters are new from CI ( claysmith).
head had been tested year ago and new valves installed (slightly oversized exhast as stock were not available).
carb is a holley 350 (purchased new when head was first installed 8 months ago).
carb plate is new.
ignition is a ds2 with manifold advance, cap and plugs cables might need to be replace (on order).
i have been able to get descent idle condition, and good on drive idle once engine is hot, but, vacuum still low, advance is high (about 20 initial), and performances not to bad, but not as they should (just guessing).
could this be cam related? i don't think so as it is not a aggressive cam.
what is your opinion ??
regards
i am still havin a bit of a hard time in getting my engine to work properly.
i have remove the cylinders head recently to change the cam after i have found camshaft was damaged.
when i fisrt installed the head a few months ago, i get perfect vacuum immediatly.
since i have change the cam (i don(t know if it is cam related or not for now) i only get vacuum reading of about 13-14.
accordingly, advance have to be pushed further to get engine to work properly on idle.
compression test (dry n cold) show correct value between 135 and 150 psi (read cold, dry, wot, after 4 compression cycle).
i have track down few vacuum leaks already, and carburator , adaptor plate, and intake manifold gaskets are new.
PVC valve is connected at carb base plate port, and advance and tranny vacuum lines are connected at the vacuum port of the intake manifold ( cylinder 6 intake) of the stock 250-2v intake manifold.
there is still a tinny leak between the tranmission modulator and solid tranny vacuum line, but really something minor i ll try to have fix asap;
i don't now where to investigate now.
the cam is said to be a 264/110 from claysmith.
lifters are new from CI ( claysmith).
head had been tested year ago and new valves installed (slightly oversized exhast as stock were not available).
carb is a holley 350 (purchased new when head was first installed 8 months ago).
carb plate is new.
ignition is a ds2 with manifold advance, cap and plugs cables might need to be replace (on order).
i have been able to get descent idle condition, and good on drive idle once engine is hot, but, vacuum still low, advance is high (about 20 initial), and performances not to bad, but not as they should (just guessing).
could this be cam related? i don't think so as it is not a aggressive cam.
what is your opinion ??
regards