johnc

I thought the Arizona Z Car moustache bar was designed to mount and clear a R230? Maybe its designed to clear the R200 finned cover?

In a past career as a roofer I nailed my thumb to the roof with a nail gun. I couldn't reach my pliers so a buddy came over and used his pliers to yank the nail out: Buddy: "Ok, here goes, 1, 2, 3... Sorry, we'll try again. 1, 2, 3... Oh that musta hurt. One more time, 1, 2, 3..."

Again, in the thicknesses we are talking about ASTM and AWS do not recommend PWHT. Proper technique and a lower carbon filler (ER70 as opposed to ER80) helps reduce carbon buildup in the heat affected zone.

Search. This has been discussed many times on this site. FYI... Positraction is a brand name for General Motors' clutch pack type of limited slip differential.

http://www.pw.utc.com/about_history_classic_r4360.asp http://www.geocities.com/Pentagon/Quarters/4980/engine9.html The power ratings for the engine varied depending on altitude with the final production version of the Wasp Major R4360-45 hitting the "magic" 1 horsepower per cubic inch number. This engine was fitted to the B36J. The turbochargers were normally governed to not allowed full boost (80 psi total) until the plane was over 10,000 feet. They also used variable vane and variable nozzle turbochargers, water and alcohol injection, and very large intercoolers (after coolers) variously cooled with air, water, and alcohol. Just because something turbocharger related appears new in the automotive world doesn't mean its actually a new idea or hasn't been tried before. BTW... The supercharger was also overdriven by 637%.

To digress a little bit more... After WW2 the biggest, most powerful aircraft piston engine was the Wasp Major R4360. It had a build in supercharger that was fed by two 14" diameter turbochargers and developed 4,300 horsepower in its final form. Pratt and Whitney tried a number of times to eliminate the supercharger because it took 425 horsepower just to spin it at the takeoff power setting. They tried larger turbos, bigger intercoolers, turbos in series, etc. and even installed a small jet engine that was fed by the exhaust from the turbos (compounding). But, all those efforts failed becasue they could not make up the loss of the 1,900 additional horsepower the supercharger produced. What's the point of this little tidbit of information? Concerns about parasitic losses are sometimes overblown.

Add is here: http://classifieds.hybridz.org/showproduct.php?product=2489

Simply wonderful! Its been a while since I spent a couple hours just welding stuff for the helluvit. Steel, stainless, aluminum, copper all welded beautifully with this new machine. Worth all the pennies I spent. I'll put my Invertec up for sale in the classified section.

Congratulations! I know a number of dime road racers that have sold their 510s for 240Zs and never regretted the change.

Here in the US, there's not much demand for CroMo cages in the road racing world. Maybe the pro teams still build them but since SCCA stopped giving a wall thickness break for CroMo everyone builds their cages using DOM. In the past you could build a cage in an ITS 240Z using .095" wall CroMo instead of .120" wall DOM. Now you have to use either .120" CroMO or .120" DOM. I don't have the FIA regulations handy so I don't know their welding and PWHT requirements for CroCmo. Assuming they require TIG welding and PWHT of all joints I guess a FIA CroMo spec cage in a 240Z would be about $3,500.

Recently a beautiful early 1972 H2 was bid up to $14,900.00 on eBay against a $17,995.00 Buy It Now price. Don't know if it sold. I owned a 1974 for about 2 months until it scared me so bad I sold it.

How about your best price on a 1972 to 1975 Kawasaki 750 H2?

According to the national standard ANSI/AWS D10.8-96, in the thickness ranges we typically see on automotive tubing and plate use (less then .125" thick) for ASME/ASTM Grade P11 or T11 (1 Cr-Mo or SAE4130) the recommendation is for no post weld heat treatment. Typical racer practice is to evenly head up the weldment and the surrounding area (3 times the diameter of the tube) to 1,100 to 1,200F and maintain the temperature for 15 minutes. Then let the area air cool to room temperature. I welded over 100 coupons of various 1 1/2" OD, .095" 4130 wall tubing joints (30, 45, 60, and 90 degrees) with no PWHT. This was part of the development of a certification program for automotive 4130 tube welding at Lincoln Electric. All 100 coupons were tested (along with another few hundred others from different welders) and all passed. Personally I don't think PWHT is needed for 4130 tubing welding if the proper filler and gas shielding is used (including back purge). I think the FAA still requires it for their 4130 certification and I know a lot of fabricators (NHRA in particular) still normalize all their 4130 welds.

In the tubing wall thicknesses typically used for control arms (less then .125" wall) heat treatment is not necessary. Post weld stress relieving (normalizing) is of some benefits if the interpass temperatures get too high.

I even suggested Vildini for a street SR20DET 240Z when Ryan called. My focus is more on race cars. BTW.. thanks for the referral Henry.

I can't believe you jacked the car up and then ran it if you suspected something broken in the driveline. You win the prize for the dumbest move of the week. Image what would have happened if that rear wheel came off while spinning at some huge rpm... Try jacking the car up and removing the wheels, brakes, etc. and checking for broken parts.

Haven't got the new welder yet so I'm not sure I want to sell the old one yet. Me and the new welder might now get a long...

Exactly! Street performance shocks (like the Tokico Illuminas) are designed to work with OEM or slightly stiffer springs so the increase in compression damping helps a bit. But, when you significantly increase spring rates (doubling them in this case) the increased compression damping hurts handling. Because the single adjustable Koni's only adjust rebound damping, the compression damping remains the same. The Tokico Illuminas are a typical "street" performance shock where both compresion and rebound damping are increased as the adjustments are turned up. The give that driver that "stiff performance feel" but actually make the suspension less compliant, especially when the spring rates are raised.

Exactly! Street performance shocks (like the Tokico Illuminas) are designed to work with OEM or slightly stiffer springs so the increase in compression damping helps a bit. But, when you significantly increase spring rates (doubling them in this case) the increased compression damping hurts handling. Because the single adjustable Koni's only adjust rebound damping, the compression damping remains the same. The Tokico Illuminas are a typical "street" performance shock where both compresion and rebound damping are increased as the adjustments are turned up. The give that driver that "stiff performance feel" but actually make the suspension less compliant, especially when the spring rates are raised.

The exhaust fumes tend to enter the cabin when the cabin pressure is lower the the air pressure outside the car - driving with the windows down as an example. Anyhting you do to make the air pressure inside the car greater then the air pressure outside will keep exhaust fumes from entering. Closing the windows while driving and having the vents all the way open, adding a roof scoop, etc. And yes, early Zs can be made gas and exhaust fume free if the 30 years old gaskets and hoses are replaced and the engine is kept in proper tune.

"Typically" 220V welders have a NEMA 6-50 plug that for a single phase 50 amp circuit. Electric washers and dryers are "typically" wired on a 30 amp circuit. I say typically in quotes because ya never know what new creative ways people and manufacturers find to wire thngs.

Maybe just fix the problems with your car before trying any modifications...

Until the Hitchhiker's Guide to the Galaxy is released (Don't Panic) I have to rely on Wikipedia for everything.

Back when we used to allow political discussions the threads never get past this point: During the flame war a HybridZ form of Godwin's Law would ultimately end the thread. http://en.wikipedia.org/wiki/Godwin's_law

Sorry, it can't be discussed until we get released from the non-disclosure agreement from the PINKS! producers.