993 power problems

[joeygigs123]

i have a 1995 911 993 with a fresh rebuilt engine everything was changed the engine has supercup cams from dr cams and the car seems to be slow and i dont know why can anyone help oh and the motor has less than a 1000 miles on it

[wvicary]

Could be loads of reasons. I would give it some time to break in before thrashing to see if it's slow. Maybe ask the guy who did the rebuild why it's slow?? Recheck the cam timing, if they are after market cam are they set to the makers spec or a Porsche spec.

[joeygigs123]

Could be loads of reasons. I would give it some time to break in before thrashing to see if it's slow. Maybe ask the guy who did the rebuild why it's slow?? Recheck the cam timing, if they are after market cam are they set to the makers spec or a Porsche spec.

[/quothe motor has been broken in and the car runs good what would be the main thing u would notice other than a loss of power from incorrect cam timing

[joeygigs123]

oh i shouldnt of used the word slow because its quick but has lost alot of power

[joeygigs123]

does anybody know what that could be or something that i could check with out removing the engine?

[magcuda]

you put supercup cams in it , what else did you do? just because you put big cams in a motor, any motor, you have to give it a supporting cast. intake work, higher compression, headers and exhaust

also bigger cams are timed for more near the top of the rev range so you may not have "felt" them yet

[joeygigs123]

you put supercup cams in it , what else did you do? just because you put big cams in a motor, any motor, you have to give it a supporting cast. intake work, higher compression, headers and exhaust

also bigger cams are timed for more near the top of the rev range so you may not have "felt" them yet

yes the timed near top is true at about 4000 rpm the car has a crazy sound but doesnt move very fast. could something be disconnected that could cause the car to lose alot of power also the car was converted to solid lifters

[magcuda]

what is a crazy sound? free revving, clank , clink, clunk?

4000 is about where the cams should start "coming on" so is the clutch slipping? does the tach go up?

[joeygigs123]

no the clucth is not slipping its just like the cams are starting to "come on" as you said but its go through the rev range like it used to. could the fuel filter or any other filter be causing a power problem. what kind of horsepower should i be seeing from the cams if i were to put it on a dyno. the cams are dougherty racing cams the model is the super cup