japscrap

one of the last drives of the season. she is pig rich and needs more tuning. At only half throttle the car goes very good. it is almost winter and time to go over every inch of the car.

https://www.youtube.com/watch?v=VAGUP1ciHrM&feature=youtu.be

I will shoot a video for you all, in the mean time here goes a picture of what I replaced on the ignition coil. it is the little white ceramic resistor?? that is in the middle of the ignition coil strap.

I have a 1979 280zx n.a, that was my daily driver for a long time. I was out tooling around the town, got home and parked the car. I went back out 30 minutes later to leave, and I had no spark. It would not start or pop or try to run at all. I had a strong fully charged battery with a good charging system, fresh plug wires and plugs. It had a fairly new cap and rotor along with a fresh tank of gas. So I went and checked all of the fuses and replaced all of the fuses located on the passenger kick panel under the glove box. I swapped ignition coils as well as Ignition ballast/resistor with no luck. The car was a very strong runner before it just lost all spark. A little about the car, it has the 2.8 but the P.O pulled the fuel injection and swapped on a edelbrock 4 barrel along with a clifford 6=8 intake. It has the original wiring harness still attached. It ran perfect and was a champ all before just randomly. loosing all the spark, I can take pictures and shoot videos of what ever you may want. I am about to get the volt meter and attempt to trace where I am loosing the electrical current! The rotor also turns in the distributor just fine when you crank. new ignition control unit new cap/rotor new wires new plugs new fuses new ballast resistor I am at my wits ends. I own a 240 with a 2.7 and a forced fed six pack. This is the one car I can not get spark on thus far. ugh.

on the weber dcoes it should be two flat head button bolts. take those out and pull it off, I made my own block off plates out of 5052 aluminum at work. Or you could just buy a set. http://www.pacificcustoms.com/ac129998.html just a random link.

Block off your chokes if you have not yet. Once I blocked mine off, it made a huge difference as they were bleeding out the pressure in the carbs. I drove the car from Minneapolis, to Cooperstown North dakota, which was a five and a half hour drive. The car did not miss a beat, I averaged about 120 miles per tank. I also have a 4 speed and was going 95 mph, in a constant semi boost at 4k rpm.

I also had the intake off and did a pressure check and it was good up to 20 psi, which is far beyond what I am shooting to run. I also added a turbo blanket to keep some heat off the 3rd carb, while the intake was off I went back over all the carbs and used the synchrometer to readjust from last year.

Alright guys, so the car is a beast. I have the waste gate set at 4 psi and she pulls like a mad man. I drilled out my secondaries they were a 88f9 I snagged a .0468 reamer and opened them up a bit! that brought my idle afrs down to 17.5- 19.7. I also then opened up my mains to a whopping .240s I can cruise around the city and hood nice and slow, but when I want to get the rpms up I need to boost. which is an awesome experience. I have been able to give it about half throttle and it goes just as quick as it did in the N.A form. boost comes on strong and is addictive on these straight sixes. I am used to boosting 4's.

my current jets stand as following f11 emulsion tubes. 145 mains, .189 air correctors. I have a holley feeling the 2l swirl pot which goes to a walbro, that then goes to a boost reference 1:1 rising rate regulator, which then goes to a 3/8 line to a fuel block to the carbs. I have not upgraded the needle and seat in the webers.

the car runs great under 3 pounds of boost, and then it lean spikes. I have a 5 lbs spring in the waste gate. I always have my eye on the wide band, around normal cruising, it is any where from 15.2- 16.4 on the afrs. when I do give it some gas and it spools to 3 psi, I can see the fuel enrichment come on, but then it just goes way to lean and wants to go 19.0 + afrs. I do have a fucked up jetting in it. I am curious about your setup and at work tonight I will change the jets and e tubes at work to a similar setup.

Alright guys, I have a quick question. on the BACK of the weber in between the runners. I have a small vent hole. do these need to be plugged/ blocked. I am at work right now and can not upload a picture. http://i35.photobucket.com/albums/d184/KJR111/DCOE_1.jpg the carb on the left, there is a square plate in between the two throttle plates. that is the hole in question.

I will get more videos of the whole car, and some driving videos soon. thank you all!

yes the garage is dirty, also yes that tv is old.

I will give some more updates when I tinker on it more! thank you to all who helped and gave advice and also shed some light on the subject!