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  1. Replies
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    Looks like the Isky stage 2 or 3 cam is what i...

    Looks like the Isky stage 2 or 3 cam is what i will want. coupled with springs and thicker lash pads.

    While i'm doing this i plan on having the head ported out more. I'll also replace the valve...
  2. Replies
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    Cam suggestions for my build

    Hi guys, I have a 72 240 with a 2.9 stroker. F54 flat top block and N42 head. Dual Z Therapy SU's with SM needles, nismo motorsport 6-2-1 header, 2.5 inch exhaust all the way, port matched intake and...
  3. It still does it with vac advance enabled, but i...

    It still does it with vac advance enabled, but i got ping under low rpm high load conditions with it in use, so i disconnected it. probably the high compression combo causing this as well.
  4. I figured the floats were fine with the SM...

    I figured the floats were fine with the SM needles being so rich. I could go a half turn richer on the fuel screws too i guess. but i want to change one thing at a time until it goes away, to be sure...
  5. I just ordered a 1.5ohm 12v petronix 40,000v...

    I just ordered a 1.5ohm 12v petronix 40,000v coil, it's made for electronic ignition so it should be fun running at 12v on the hot spark module.

    Also gapped my plugs up to .45 to take advantage of...
  6. floats have been rechecked twice, they are...

    floats have been rechecked twice, they are exactly on spec. plug gap is at .35 across the board, i run with no vac advance
  7. it has an LD crank in it. it's definitely a...

    it has an LD crank in it. it's definitely a stroker motor.



    wish i could nail it down, advancing or retarding timing doesnt seem to have any effect on the flat spot. but retarding does kill my...
  8. I've been reading and it seems that this flat top...

    I've been reading and it seems that this flat top block and n42 head bump the compression up too much for a stock cam, this might be my issue, as the mechanical advance maxes out around 3000rpm where...
  9. the z thereapy dvd says to set the needles...

    the z thereapy dvd says to set the needles against the jets (at zero turns out) by holding up on the choke plunger and pushing the slide down until it stops, then completely tighten the needle set...
  10. I would have to buy a wideband, I don't know of...

    I would have to buy a wideband, I don't know of anyone that will loan me one.

    If i remember correctly the cam is a factory n42 cam, making it an "a" grind. I want to get a stage 2 cam for this car...
  11. anyway. I'm pretty sure this is fuel related. can...

    anyway. I'm pretty sure this is fuel related. can anyone else recommend good needles for a 2.9 stroker build with a free flowing exhaust?
  12. I see that, but it also states that if the coil...

    I see that, but it also states that if the coil is getting more then 14v when the engine is running that you need to either install a 3 ohm coil, or a ballast resistor. It is definitely getting more...
  13. I agree, but if the coil is not supposed to be...

    I agree, but if the coil is not supposed to be getting 12v because it is a stock coil, this could be a problem. I know the coil is getting 12v, and this coil was on the stock points distributor, so I...
  14. I just know the coil is getting 12v with the...

    I just know the coil is getting 12v with the engine off and probably closer to 14 with the engine running., which means i don't have a ballast resistor.

    secondary resistance is from one of the...
  15. yeah 1.5 ohm for the 6, but thats also assuming...

    yeah 1.5 ohm for the 6, but thats also assuming you have the stock resistor in place.

    it says: "Check the voltage reading at the coil's + terminal, engine running, at 2,500+ RPM. If the voltage...
  16. I have a hotspark conversion, it says to never...

    I have a hotspark conversion, it says to never use a a coil under 1.5 ohms.

    This is the unit I got. http://www.hot-spark.com/Installing-Hot-Spark-Hitachi.pdf

    It says I should have a 3 ohm coil...
  17. Well, I checked the black wire with white stripe...

    Well, I checked the black wire with white stripe on my coil (which i can only assume is my coil voltage feed/tachometer wire) an it is feeding 12v to the coil with the key on.

    My coil reads 1.4...
  18. seems fine, maybe a little bit jerky on the...

    seems fine, maybe a little bit jerky on the throttle.

    there's no cam in the car from what i can tell, maybe it needs one.
  19. OK, so i pulled a needle out, it says SM on it,...

    OK, so i pulled a needle out, it says SM on it, no numbers that I can see.

    What am i after for a 2.9 stroker?
  20. My timing used to jump all over + or - 5 degrees...

    My timing used to jump all over + or - 5 degrees with the points, but now that i have electronic the timing marks are rock solid when i use the timing light. the stock distributor is solid, bushings...
  21. I'm not sure where I read it but I think ATF is...

    I'm not sure where I read it but I think ATF is like 20 weight?

    I'm not sure thicker oil will help, because it feels like it's constantly bogging on the highway. not sure how to explain it. it;s...
  22. Sorry guys, its the stock 240 dizzy with an...

    Sorry guys, its the stock 240 dizzy with an electronic conversion. it's also a stock 240 1.5 ohm coil with the ballast resistor in tact from what I can tell, but i don't know where the resistor is,...
  23. I am running ATF in there now. the problem is a...

    I am running ATF in there now. the problem is a consistent flat spot where the car feels like it doesn't want to go any faster, it lacks response and torque unless you push the pedal through the...
  24. yes sorry, fixed original post.

    yes sorry, fixed original post.
  25. Flat spot under light throttle application.

    hi guys, I have a 2.9 stroker motor in my z. I have a flat spot under light throttle with load, it sings under WOT and idles and revs perfectly fine. the problem is a consistent flat spot where the...
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