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HS30-H last won the day on May 27 2019

HS30-H had the most liked content!

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About HS30-H

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  • Birthday September 11

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    London, England, UNITED KINGDOM

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  1. What class of road racing? As far as I can see, a head like this isn't legal in any class where it would be competitive.
  2. There are plenty of K.E.W. Twin Idlers in race (and rally) use, and there have been for many years. A wise head once remarked to me that the incessant drone of 'for' and 'against' from the sidelines easily drowns out the mild gear whine from a properly adjusted Twin Idler...
  3. It has been discussed many times over the years on this and other forums, but the Twin Idler chain tensioner was created (by Shigeo Mori and Kameari Engine Works) to address issues related to chain whip and consequential variance in cam timing - especially during rapid off-throttle engine deceleration. He found that in some circumstances the chain whip was so severe that it completely overcame the stock tensioner and the camshaft was out of phase with the crankshaft to a degree where pistons were kissing valves. The stock oil pressure-powered 'shoe' tensioner in these engines was a
  4. You're about a week late with that. I think the recipient vehicle and its intended use is a very relevant factor here. I'm not a fan of what I see from this Apex kit and I think you'd be wasting your time and money if you went with it.
  5. The Porsche 911 is a roadgoing sports/GT car. I'd say it has been successful as such whilst also being successful when converted to a homologated race (and rally) car. You may have noticed that Porsche have made some pretty good (understatement) prototype/sports racing cars too. We know where they started, and that circumstances were quite different then, and that - given the choice, and access to a time machine - they'd probably not do it that way for so long, but nevertheless they dominated their chosen field. I don't understand the point of dissing all that, even with faint praise.
  6. Porsche. International Cup for GT Cars winners 1968, 69, 70, 71, 72, 73, 74, 75, 76 (just for example...) Porsche. International Championship for Make winners 1969, 70, 71, 76, 77, 78, 79 (just for example...) That's *quite good* in my book. This Apex Engineered Track Attack kit: To me it looks like something more befitting a space-framed track car, a full monocoque chassis or at least something with a lot more torsional rigidity than a baggy 50 year old street car which will probably end up acting like the fifth spring in the equation.
  7. And yet the Porsche 911 is one of the most successful road car-based models in motorsport history. That's a "massive mistake" a lot of other manufacturers would be happy to have made. Quite funny to see this posted on a thread discussing APEX Engineered 'Track Attack' package, which essentially throws away most of the stock Z's suspension and replaces it with something that will usually bump the car up into race categories where it will still be outclassed. Often by hot-rodded 911s...
  8. Not for a harness bar. They were the side mount points for the factory 4-point roll bar:
  9. If anyone is expecting to turn up and "race", they'll be disappointed. The 'track sessions' are essentially parade laps.
  10. Where is the "fluid flow", and how much 'flow' is really happening? By definition there will be some movement of fluid at the Master Cylinder end of the equation, but it should be minimal at the business end if everything is working as it should. What you're doing is putting pressure into a fluid. I tend to think of it as like people joining the end of a queue and pushing. Everyone squashes up, and the people at the front of the queue feel the most pain.
  11. It helps if you have it the right way up.... It's the combination Nissan/Prince emblem, introduced after the 1966 merger. It's a monogram with stylised letter 'N' and letter 'P' combined to form a cypher. It was derived from the old single letter 'P' Prince logo, and intended to pay respect to the history of the Prince marque when it came under the wing of the Nissan group. Here it is on the front of the Nissan R382 sports racer. This is the correct orientation:
  12. Stating the obvious again perhaps, but the dimensions are on the car... If you're going to fabricate something yourself, make it to fit your car, not something else.
  13. Rather obviously, the above photos show two different parts. Top photo (that's my photo, I believe...) illustrates the 432-R type 'Undershield', part number 98200-E8700. This was essentially an aero-oriented part, and matches up with a dedicated FRP front apron unique to the 432-R model. Bottom photo is the 99090-N3075 'Under Guard', which was aimed at rally use on L6-powered cars and mounts lower on the car (as rally car ride height was typically higher than stock). It was designed to be a protection-oriented part, rather than aero. Hence its relative thickness at 10mm
  14. The BRE rear spoiler was designed in-house by Nissan in 1969, homologated as stock equipment for the PS30-SB 'Fairlady Z432-R' model. BRE simply used the homologated Nissan item on their race cars, then made and sold copies of it.
  15. It'll be either an F5C71-B (5-speed, Direct Drive) or FS5C71-B (5-speed, Overdrive), because there's no such thing as an "FSC5C71B".
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