djr81

Top points for Holdsworth & Davison punching on in the pits after the race. But how come Whincup gets away with punting Bargs when Courtney doesn't?

Yeah I see what you mean. Depends on how you extrapolate the line I guess. Looking at it again there is probably not much in it. I guess it doesnt matter much anyway as the PFC is looking for 2 AFM's.

Yeah I remember the olden days before all the time attack hype. Good times, good times.... Motorsport (in just about any form) is expensive to win. Trying hard in the midfield, less so.

The Z32 basically reports the same voltage as the Nismo AFM after 500kg/hour. The stock AFM hits 5 volts (ie max voltage) at just over 700kg/hour or about 26lb/min in old speak (which aligns with turbo maps). In the olden days (When I went to uni) the rule of thumb was 1 lb/min of airflow = 10 horsepowers. Which ties in pretty well with your number. You can measure the AFM voltage off your PFC hand controller which then tells you (With reference to the curve) your airflow. Then go to the turbo map, match the airflow & the boost & you have the duty point for the turbo.

Here is the AFM versus voltage graph for the AFM's. Air flow is directly proportional to horsepower. So your single Z32 AFM is capable of measuring alot less air than the twin RB26 items.

The power steering pump weights bugger all. The response of your steering is unaffected - it is just the effort to get the wheels to turn is less with power steering. Feel is fine with Skyline steering. What power steering does allow is to maintain a reasonable wheel weight whilst running fully sik & hektic castor angles that the drift nuggets appear to enjoy. It is hard to be subtle with the steering when you need arms like Popeye to get the thing to turn.

The concrete answer is to get a rim with the correct offset & one whose width matches the tyre. Then run a camber number closer to one degree than three.

Thanks Baron. They do a 1.2mm (1.0 is discontinued) in 87mm. There is a metal super Grommet one, presumably the other type is a Wallace?

Seriously dont get too hung up on this stuff. Most of the braces sold do very little other than lighten your wallet and weigh down your car. Chuck a strut brace at it & leave it at that.

Cheers for the info.

The Nismo diff is noisy irrespective of which setting you have it on. The lowest setting is alot less nasty than the tightest, however. I found that using something other than the fluid provided with the diff does quieten it down a little.

I have an RB26 just about to undergo a rebuild. Nothing spectacular the number will be about 500rwhp on 20lb's. Obviously it needs a head gasket of some sort. Are there any preferred styles/brands etc. What size should the gasket be relative to the pistons? Does (say) an 86.5mm piston need a certain sized gasket that may be different for an 87mm piston? Lastly there are a number of different thicknesses available. Is the 1.2mm thickness essentially the "stock" size. EG 11044-RRR46 Nismo Metal Head Gasket

They just have large signage on the launch & test cars so everyone knows who the tyres belong to. By the time they start racing properly the tyres will be covered in black so you wont even notice the branding. Hell half the time it was near on impossible to pick who was on what tyre anyway. Anyway McLarens look better in orange so who really cares.

Bolt pattern?

After a pair or four Rays CE28 rims. Prefer 17 x 9" in either a +15 or +22 in titanium silver. Need to be 5 bolt 114 PCD (ie for an R32 Skyline). If you have a different rim from the Rays range Re30's, TE37's etc (as long as the size matches) I would also be interested.

Seriously, juest get a dry cell. It depends on how many amp hours you think you want but it can save quite a few kgs. This is just on Amazon. Proper Braille motorsport battery. Braille Battery 11.5lb, 904 pulse cranking amps, 360cca, 15amp/hr 1yr warranty - Left Side Positive Terminal Cost is $160 + freight. You can get other larger capacity (amp hours) locally for not much more.

From that description - if it is priced reasonably - buy it.

Lets see it is wired into the loom for the ATTESSA computer. So how about we take a stab in the dark & suggest it controls the torque split for the car. Or the flux capacitance of the system if you you prefer that terminology.

Can I ask where you ordered them from?

There were two issues: 1. The wings that were banned in the late 60's were designed such that the downforce acted on the wheels (uprights) not the chassis. There were a number of failures with nasty consequences, mostly on Lotuses. So they changed that rule to ensure the wings acted on the chassis and removed the struts that held them up. 2. Moveable aerodynamic devices were banned because it not only includes wings but fans etc. Also moveable devices are far more likely to fail than fixed wings & the consequences of failures are pretty dire. They are only really a bandaid solution anyway. As for Melbourne a coupe points come to mind. 1. The circuit is rubbish. 2. All sorts of inflamatory statements will be made to help people with their bargaining position. Best to ignore all of it. Oh and look Ferrari are trying to look Italian again. Bit like Lotus trying to look English or Renault French or oh you get the idea.

I quickly checked the Tomei price. Cooling channel version $3000 for the six, normal version $1780 delivered. the Mahle pistons are approx just over half as much. As far as coating go I wasn't bothered with titanium this or that, or ceramic coating the crowns - more interested in a low friction coating for the piston sides. HKS - part number 2103-RN017 lists as $2124 delivered. 2103-RN021 lists as $1585 delivered. So the Japanese stuff doesn't appear to be particularly good value. It may, however, be more suited (As opposed to more generic although that is just conjecture) How do Mahle pistons go for noise? I'll have a look for Ross stuff also.

There are a few vendors in the States (A few, a hundred....) from which you can import. Not sure if Summit list them, however. You will avoid import duty but may get stung for GST. Still at about $1k + shipping & taxes they are good value. As an aside is there as equivalent forged piston thread out there? I looked & didn't much like the CP's (Mostly for the O/S valve cutouts), wasn't 100% sold on the Mahles (Clashed with oil squirters) & dont know much about Wiseco. The Japanese stuff appears to be expensive & I bereft of coatings. Any ideas?

The I section versus H section argument is about as interesting as shovelling muck. In this case the H pattern rods are marketed by Carrillo as being stronger. http://www.cp-carrillo.com/Tech/RodTech/tabid/76/Default.aspx

There is a little company called Carrillo who make nice rods. H or I pattern, take your pick. Just over 500 grams for a rod with bolts for the heavy duty rod which is about 120 grams less than stock. So less reciprocating mass & more strength. Win, win. Your budget is about right.

Well that all sounds (& is) good but it doesn't count for much when you cant pick up satellites or the auto start feature doesn't work on half the functions. Or for that matter you send it back to get fixed & they pronounce it fine when it just isn't. Anyway fingers crossed the new ones will be better.