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HybridZ

1 fast z

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Everything posted by 1 fast z

  1. If you calculate the Forces involved with those cams, at 8000 RPM you will see that a sholder bolt or equivilent, as shown in that drawing will shear off. You always want to pull in a STRAIGHT line, therefore no real force on a tensioner, etc. Just like stock L series.
  2. Wrong installed clearence. Cast has lubricity properties as well, and holds oil well. I always use cam break in lube on valve guides as well. Remember .0001" too tight will always fail, but .003+ will always work. Same goes with bearings.
  3. I believe the 240's ran off of the positive side of the coil and not the negative, not sure if the 260 was this way or not.
  4. I would MOST definitly make it a STRAIGHT shot from the cam gear to the crank on the tension side. If not, you will most definitly shear off any idler gear that is put there. There is a crazy amount of force that is needed to drive those cams at high speeds. Make a custom WIIIDE lower cover, or make a jack shaft mount like the 240zx engine does.
  5. Remember to cover those ex ports too! DIrt can go in them just as much as the intake ports. I would hate for that pretty motor to have scored cylinder walls
  6. A Crossflow DOHC that flows more and has more valve area will ALWAYS make more power tony, Plain and simple. Just because you were part of a team of guys that took a 2.0 liter motor to 10,000 with a non crossflow head, doesnt mean that was the best. I gurantee you a dohc head on that same block would make more power, and have more area under the torque curve, and HP curve.
  7. WHen I built my head, the timing system and cams was by far the most complicated and time consuming when compared to the actuall head. Getting the head together and everything lined up was actually the easy part. What is the aftermarket support for these motors? As far as cams, valves, etc? Is this a solid cam head? When you take the block and head to the machine shop, ask them to flow bench the head. Looks can be VERY deciving. Did you know that a stock P90 head flows about the same as a 7mgte toyota head?
  8. MACK on here, stated he checked into it all and said it would not work. PM him, to see the details. I would like to see some flow numbers of the merc head.
  9. I suggest a WATER line and hose also. I have had extinguisher's run out of steam, and needed fire hoses. Also, water is alot easier to clean up sometimes than the chems. A Water hose will not run out of steam.
  10. His first car. Well I took 4 years with my dad to build my first car: I have a few projects lined up though. I have a super clean 1970 Z, that would get a NA motor built for it, But the only way he gets a cool car is if He and I BUILD it. I would let him take the fairlady to prom or something though Only thing I miss out of the whole baby thing is sleep! Other than that he is wonderfull! Thanks all!
  11. The turbo car is probably the most quiet car I own. It is really quiet. I was brought home in a 1970 Buick GSX that ran 12's in the quater. Infact my sisters were also brought home in the same car. My sisters kids were brought home in the GSX also. Sadly that car has a blown motor now. Do you see anything wrong with my driving? Was I doing 100MPH burnouts? Geeze, Here I come just to show joy, and relating to z cars. I guess I should of just kept my enjoyment to myself. I guess I also should not havebeen holding my son yesterday when I was bunjee jumping either (rolls eyes) .
  12. Dear Frank, I am still waiting on the hood opening latch that you broke like ten MSA shows ago, and you said they never break in Holland, and you would get us one!
  13. So as some of you know, My wife and I were pregnant (well she was but you get the idea). Our sons due date was 6-23-09. Well here we were on 7-1-09 and the doctors did not like how long it was taking so they were going to induce labor on 7-2 at 7:30 am. Well at midnight of 7-2 (7 hours before scheduled induction) Jocelyn (wife) went into labor. Well 12 hours later at 12:01 PM Our son, Ethan David Blake was born. 8lbs, 22" long. Healthy as an ox . For his first car ride home I thought it would be cool to bring him home in the Fairlady. It was 109 degrees outside when we brought him home from the hospital! For all of you guys that have extra time, here is a home vid of the ride. BTW, does anyone know of a cheap editing software, or even free on the web? The video was 13 min long, but youtube did not want to have any vids longer than ten minutes. I mainly just want a software to shorten vids. Anyone have any ideas?
  14. Vinal top and rear louvers are two of the worst options ever on a car IMHO.
  15. Ok, its like saying. I turned my boost up from 10 lbs to 20 lbs. I thought more boost was supposed to make more power. Dont tune it for 10 lbs then turn up the boost to 20 lbs and expect to get more power! Tune it with air horns! It will make more power with air horns, even with the air box.
  16. I have probably studdied L head combinations as much as anyone on here. I own 3 seperate RB heads. I have built my own twin cam head (only one in the world that is a KA head setup) and have looked using one of my RB heads. I can say this, it is easier to do the KA head setup than it is to use the RB head. The RB head is about 1" too short. None of the water passages line up. Nor the oil passages. Then the worst part is the timing system. RB is belt drive, and the snouts of the cams come way out in front of the block. The best way would be to build a jack-shaft that comes up and mounted in the block above the crank about 6". Then make a speacial timing cover that has support bearings and use an outboard shaft out of the cover. Then run a belt and tensioner system from that external jackshaft up to the cams. I will probably do it one day, just to say I did it, but I see it at about twice the work compared to my setup. Only benifit, is you can run manifolds that already bolt up.
  17. I have sonic tested diesel blocks. They will not even accept a 87mm bore.
  18. No it cannot. I have sonic tested numerous blocks (over ten) and none of them could run that much bore. I even offset my boring to the core shift of the block. At 89mm bore It is at almost minimum thickness.
  19. Block is a P30 which is a 240 block.
  20. Do you need it? No. Will you notice a power difference if done with or without it? No. I have bored a block, and before honing mic the cylinders for roundness, with a tenth bore guage. Then did the same with a torque plate installed to see how far it actually distorts (SP?) the cylinder. You would be suprised on how little it actually does. Then you add the fact of warm water that should be flowing through the block also when honing is being done makes a bit of a difference. The best way is to hone from the bottom with a head installed and 195 deg F water flowing through the block and head. But again, no you will be fine without it.
  21. A guy that can not take constructive critisisim, will not make it far. If you cant take it, dont post on this forum. All we are doing is providing our own personal experience with these motors, and motors in general. Use it or dont.
  22. Only thing that matters is that the rotor is pointing in the correct position to the cap.
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