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John Coffey

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Everything posted by John Coffey

  1. John Coffey
    Let it sit on top.
  2. John Coffey
    My issue was with the blanket statement posted above, not what's appropriate for a specific car. 99% of the 240Zs driven on the street do just fine with the factory exhaust. A good valve adjustment will usually give a bigger horsepower gain then upgrading to a 2.5" exhaust.
  3. John Coffey
    Well, every SCCA ITS 2.4L car I've ever seen runs a 3" exhaust. All the Vintage racing 240Zs I've seen run a 3" exhaust (2.4L, 2.8L). My old NA 3L ran a 3" exhaust... I can keep going...
  4. John Coffey
    The Euro springs are only aobut a 10% rate increase over the USA OEM rate so they are fine with the bars you have.
  5. John Coffey
    No. Those are fine for a car running the factory springs.
  6. John Coffey
    http://www.nationalsprings.com/ http://www.associatedspring.com/special_order.html http://www.springsfast.com/springs-products.htm Figure $500 for a set of 4.
  7. John Coffey
    Art, After your description here and the need to feather the throttle to keep the car running, I'm leaning more to a fuel issue. Also, check for vacuum leaks.
  8. John Coffey
    Tie 9' of rope between two tires. Hang the tires over the car on each side. Repeat 4 times.
  9. John Coffey
    I've run the Tokico HP shocks with both the Eibach Pro Kit and Tokico HP lowering springs. Either spring set is nice for a street driven 240Z. The Tokicos run your car a bit lower and are a bit stiffer then the Eibachs. Also, the rear springs in the Tokico kit are linear and tend to reduce squat compared to the progressive rear Eibachs. Both kits front springs are progressive. FYI... the front "effective" spring rate for the Tokico kit (HPK251) is 140 lb. in. The rear spring rate is 165 lb. in. FYI2... the spring rate for the Tokico springs in the 280Z kit (HPK253) is 185 lb. in. front ("effective" rate) and 200 lb. in. rear. These can be installed on a 240Z but you won't see any lowering benefit unless you cut 1/2 to 1 coil. Disclaimer: I sell the Tokico stuff.
  10. John Coffey
    I haven't installed a set of AD struts on a 240Z. Mostly Koni 8610s and 8611s and Tokico HPs, Illuminas, and HTSs. Sometimes I install the threaded sleeve up close to the gland nut and other times its as much as 2" below it. It all depends on the specific application. Right now I'm building a suspension for a street 240Z running a LT1 and big wheels/tires. I'm using the stock upper spring isolators, coil overs, and 8" tall springs. In this particular case the 5" threaded collars are 1/2" below the gland nut. If the customer had provided 10" tall springs the threaded collar would be 1 to 1 1/4" below the gland nut. There's no one set rule regarding where all this stuff get's positioned for a S30 car. I adjust things based on the customer, the intended use, budgets, and what will work given the above constraints.
  11. John Coffey
    The shocks in both the front and rear struts need to positioned at the top of the strut housing. You do this with spacers underneath the shock. Where the threaded collar is positioned on the strut tube depends on the length of the threaded collar (typiccally 5"), shock travel, length of the strut tubes, spring length, spring rate, car corner weight, tire OD, and your intended static ride height. A 5" threaded collar positioned at the top of the strut is absolutely too high for 12" tall springs, probably too high for 10" tall springs and maybe OK with 8" tall springs.
  12. John Coffey
    Datsun/Nissan car R180 differentials typically used 25 spline stub axles. Nissan truck H180 (live axle) and Subaru WRX STi R180s used 27 spline stub axles.
  13. John Coffey
    A 3.90 ratio R180 diff is pretty rare here in the US and most folks who own one are racers. That gear worked out very well for a number of specific east and west coast race tracks for those folks racing a 240Z in SCCA's ITS class. 3.70 ratio R180s are more common. I sold one last year with a brand new LSD installed for $650. Typical transaction prices for a R180 3.90 is around $250. With a good, recently rebuilt LSD installed the price is around $750 - when you can find one that someone is willing to sell. R200s with 3.90 gears and an open diff sell for $100. With a LSD they are around $500. And, if you can afford it, buy one with a LSD. Its the single best thing you can do for the handling of your 240Z.
  14. John Coffey
    Poor man's close ratio 5 speed: Later 5 speed (81 through 83) from the NA 280ZX with a Nissan .86 overdrive 5th gear set part number: 32310-58S54. That will give you 3.062, 1.858, 1.308, 1.000, and .864.
  15. John Coffey
    I got one (actually I have a whole pallet of 240Z struts) and can find a good one and ship FedEx overnight tomorrw. Your shop should have it by Thursday. Give me a call at 714-299-4000.
  16. John Coffey
    I've got one. If you need just the strut tube its $50 plus shipping (which could be expensive). EDIT: You might also try contacting Art Singer from Nissan Sport Magazine. He's local to you and might have a strut lying aorund.
  17. John Coffey
    My wife tells me that all the time...
  18. John Coffey
    Plymouth Barracuda's powerd by the Chrysler 425 Hemi were built in the 1967 model year. About 5 were hand built by the Chrysler engineering staff in 1967 as prototypes for the SS/B NHRA class. These, along with the 50 to 75 1968's that were built under contract to Chrysler by HURST dominated SS/B and SS/BA in 1968 and 1969. Here's a link to the text of the dealer announcement letter: http://www.musclecargarage.com/Chryslerannouncementletter.html They are very rare but they did exist and could be ordered by any customer with money and a signed waiver.
  19. John Coffey
    Did you read my post above? Snell changes and improves its testing standards above every 5 years. The last revision increased the area around the lower part of the head/ helmet that's testing by the various impact anvils. Most of this is due to the mounting requirements of the HANS and other neck restraints to the helmet. A 2005 rated helmet is measurably safer then a 2000 rated helmet, especially if a head restraint is used by the driver.
  20. John Coffey
    The Snell testing standards are revised about every five years with increases in the area of the head covered and tested as part of the 2005 SA revision. Most race sanctioning bodies allow the current and at least one past Snell rating to compete. If helmets are purchased in a timely manner, when the ratings are released, a racer can go 10 years before having to replace their helmet. That's what I have done since 1995 and I'm on my second SA rated helmet (2005 rating). So, I've spent $1025 on helmets since 1995 and, if I'm lucky, I should be good until 2015. Doesn't seem like a lot of money to me compared to what I spend on tires, brake pads, fuel, etc. FYI... helmets should always be replaced if damaged in an accident.
  21. John Coffey
    Traded e-mails with him two weeks ago.
  22. John Coffey
    Another data point... I just recently looked at #502 with a build date of November 1969. Its hood matches the blue hood in the first post.
  23. John Coffey
    My post above was meant as a joke but I guess it didn't translate well. Sorry.
  24. John Coffey
    The OS Giken head thing comes up every few months. Its a running joke over on HybridZ.org. These are very rare and not in production anymore. If one comes up used for sale the transaction is in the tens of thousand of dollars and usually occurs privately between people in the community. I've never, ever seen one advertised for sale. What happens after someone posts the information above is the original poster tries to start a "Group Buy" and comes up with 10 people that want to put one of these heads on their L6. None of those 10 people have the money, OS Giken isn't interested in restating manufacture, and the deal collapses in ridicule and accusations. The OS Giken head is the Loch Ness Monster of the USA based Z community. Its real but extremely rare in other parts of the world.
  25. John Coffey
    No, they recently came out with a 48 valve head. Do a search on O.S. Giken TC48-BS.
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