Phacade
09-15-2000, 08:17 PM
I know you guys are probably the most experienced Z people on this site, so I turn to you.
I recently rebuilt (using all new parts) a '81 L28. I took off all the fuel injection parts and added dual SU carbs from Z therapy. I used the 280ZX electronic distributor and coil, and added Motorsports 6 into 1 headers going into straight 2" pipe all the way back. The car runs, but not well. It will not rev above 3000 rpm, unless I take off the air filter, then it will go to about 4000 rpm. It has no power (0 to 60mph takes about 2 min). The plugs look very black, and kinda wet, wetter back towards 5 and 6 cyl. It almost looks like oil or gas mixed with oil on the rim where the spark plugs go. I have set my carbs time and time again, set my ignition timing repeatedly; and still the same animal. I have had a few people tell me that this will happen if my cam timing is off. I had a friend help me with this part when we put the engine together, and since it was a new chain, he used timing mark 1 on the cam sprocket, or so he said. Beyond this, I really have no idea what to do. How do I check - fix the cam timing? How is it suppose to be setup? Any thoughts? PLease help me, I am literally at my wits end!!
I recently rebuilt (using all new parts) a '81 L28. I took off all the fuel injection parts and added dual SU carbs from Z therapy. I used the 280ZX electronic distributor and coil, and added Motorsports 6 into 1 headers going into straight 2" pipe all the way back. The car runs, but not well. It will not rev above 3000 rpm, unless I take off the air filter, then it will go to about 4000 rpm. It has no power (0 to 60mph takes about 2 min). The plugs look very black, and kinda wet, wetter back towards 5 and 6 cyl. It almost looks like oil or gas mixed with oil on the rim where the spark plugs go. I have set my carbs time and time again, set my ignition timing repeatedly; and still the same animal. I have had a few people tell me that this will happen if my cam timing is off. I had a friend help me with this part when we put the engine together, and since it was a new chain, he used timing mark 1 on the cam sprocket, or so he said. Beyond this, I really have no idea what to do. How do I check - fix the cam timing? How is it suppose to be setup? Any thoughts? PLease help me, I am literally at my wits end!!