Leaderboard

The splash pan may help with engine compartment temperatures, but I can testify from personal experience in Zilver that it helps keep the front end from floating at high speed. I believe it helps reduce turbulence (engine and firewall) in the front which results in decreased up-lift. Once the pan was installed, at speeds of 100+ steering became much more stabile.

Just a quick follow up for anyone interested. The turbo actually IS an aircraft turbo, it's a Rayjay turbo for a Cessna, I'll have to go back and get the actual part number, but mystery solved.

You can use some blocks of wood between the center sections of the hood and the body and re-arch the hood. Remove the cowl first so you can push against the stronger inner structure. Massage it some then reinstall the cowl. The hoods are fairly workable. Be careful and make lots of tries. Don't crimp it!!! You could even use a 12"-16" block of 2x4 to push the corners of the hood down so you can apply even distributed pressure

Plugs are looking good. I actually thought it might be running a bit rich. The SU chokes are a great way to check for a lean mixture. How many turns down are the mixture screws now?

The notches in the cam sprocket appear to line slightly advanced to the notch in the thrust plate. Is this an issue? The crank timing is set to zero on the dial. I couldn't get a picture, but the intake and exhaust valves look closed to me. The last picture is the one that shows my concern. The mark indicates that I may be slightly advanced. The timing chain and all associated parts are new. Sent from my Coolpad 3310A using Tapatalk

well I tried marks suggestion checking the choke and when I pulled the choke on a little it was idling better so I richen both carbs a 1/4 turn down and rebalanced the carbs and it is a lot better . must have been a little lean for the L28 motor. also the temps are a lot cooler here now but still have the humidity .I so she runs a lot better now with the rpms idling in gear at 675 and pretty steady with barely any shacking of the motor. I put 20 miles on the car today and pulled the plugs to see what is going on . here are the pictures you asked for mark the plugs from left to right are 6,5,4,3,2,1 thanks

Is the straight side, the driver's side, of the chain tight? If you rotate things backward you can make it loose and it will do what your picture shows. You can put a wrench on the sprocket bolt and tighten it up without turning the crankshaft. Beside that, when it wears a little it will retard slightly. But it's in range, looks good.

I think that's normal and it's fine. It's a tiny amount, a degree or two. And wear/stretch will retard it bringing it closer to nominal perfection.

Japanese Racing White's Tech Tips. Woof, that's a mouthful of change. Will you do two blue stripes? I like stripes.

I have your setup, ceramic headers and heat shield but I set my idle at 800rpm. I removed my heat riser so mine gets plenty of cool air using a Nissan air filter. No stumbles, sorry. Remove the filter and see if it smoothes out. Also I think adjusting the valves would be a good idea too. Make sure your nozzles are full up off choke. The choke wires slip sometimes and won't let them pull the nozzles all the way up.

Hi ,here is a quiz What made S30 prototype upgrade to a six- cylinder engine from a four- cylinder engine? #1. Styling designers wanted a bigger engine #2. Mr. K said “it has got to be a six -cylinder engine for America “ when he saw the prototype #3. Executives in Japan thought it wasn’t a good thing a sedan (Skyline ) has the most powerful engine ( S20 ) in their products . “We have Fairlady ,a sports car deserves a powerful engine . Let’s put S20 in it “ If someone who read the Mr . Uemura’s book correctly,and the book is interpreted correctly ,it is easy to find the answer. I would like to have the English version to see if the book is telling what Mr. Uemura originally wrote . Kats

I did read the info you guys gave me. Some say they came from the factory with it and many say they don't and it was just a dealer option ? And the 240Z and later 260/280Z have different splash pans ? I just want to know if they came from the factory with that splash pan ( 240Z ) ? if not, then I don't want it either...

Ol' Blue!!!!

Agreed. Hopefully no revisit. I used an OEM Nissan gasket because after all the problems I had with my motor, the last thing I wanted to do was mess around with the head gasket again. Not saying that's any better or worse than what you used, but just that "if it's good enough for the dealer"... And there is a note in the FSM about re-torqueing, with the assumption that your using an OEM gasket of course. I figured what could possibly go wrong. Go wrong. Go wrong.

Both sides

Those injectors aren't what I thought they were. Nissan injectors all have the same number on the side, and use different colors to differentiate volume. There should be a number/letter like A11000... in this spot, below. You have mystery injectors. They could be 265 cc aftermarket turbo injectors instead of 188 cc NA injectors. That might explain the low fuel pressure and the reason he used an adjustable regulator. Aftermarket injectors come in a variety of colors. So, unfortunately, you might find that you are unable to raise fuel pressure to spec. without causing the engine to run really rich.

I'll have a look tomorrow. I picked them up a while back on a local website.

I understand. I'm walking into an area where you all have great experience and I'm the nub. I'm bound to get overwhelmed till I at least start to catch up. Not a problem.

If the brake light comes, you have a pressure differential between the front and rear systems. See screenshot brake switch. Could be a couple of things causing it, but if you can't find any brake fluid leaks at the wheels then it's likely the master cylinder leaking back into one of the reservoirs or back into the booster. That or air in one system.

Sorry. Is a pressure kit. Just hoping to get better pressure reading than the inline gauge. It runs okay. The exhaust on it makes it loud and it's not completely smooth, but does fine out on the road.

I always fill the supply line from the fuel pump rearward to make it easier to prime

Hi Chris, I did not think about it, but yeah, I imagine they wanted to express the word " Maru " ( means a circle ). Just my guess. Blue, I am not an expert about this. Alan is the best. And here is an interesting material which we would love to see, a S20 prototype. Prince engineers began to develop S20 in late 1967, this S20 prototype has many things different from standard production version. Mr. Watanabe who owned this S20 prototype (currently sold to a fanatic) said design of valves and camshafts , combustion chamber etc they are far better than standard S20. And this prototype is even compact to compare with the standard S20. And you see the mount, this prototype has a set of Z432 mount. Mr. Watanabe said this engine could be installed in a Z432 and tested. The mounts came with this engine from the beginning. I do not know this is the 230PS engine which was tested in a S30. And a casting code on the block, you see "70929004" This could be ment "1967 October 9th " or "1967 September 29th" What do you think of it ? I visited Mr.Watanabe's shop last winter, his shop is like a dream land . Lots of S20 and FS5C71A, R192 , and GTRs. People like to throw away FS5C71A and R192 because of the weakness and hard to maintain due to difficulties of supporting parts. We have FS5C71B and R180 and R200 , they performe better and easier to maintain. However Mr. Watanabe like old ones. I will ask next time, why ? Maybe they are lighter than later ones? He is still developing a racing GTR for his own, using FS5C71A . His skills and know how are continuously given into customer's car. Wonderful man. Kats

I wouldn't place too much store on the 'HP' element in the quote. Uemura san's original book (as opposed to the 'translation' version) uses the term '馬力' ('Bariki') which is an equivalent term for 'Horsepower', whilst the Japanese testing standard was actually 'PS' (the German standard of Pferdestarke) and the numbers are all very much rounded up. The normally-quoted figures for the different iterations of GR8 race engines on the other hand were usually somewhat rounded down, in order to keep the competition guessing. Quite a lot in Uemura san's original (Japanese) book seems to have been edited out of the English language 'translation', or 'tuned' to suit the 'Datsun 240Z' retitling. In any case, I would not take quoted engine power figures in either version at face value and without bearing in mind the wider stories behind them.

"G8B" was the factory designation for what then became the 'S20'. It wasn't the same engine as the GR8, despite the bloodline. The 'G8B' was somewhat simplified and mass-productionised in comparison to the pure race 'GR8', and the cylinder head casting in particular (along with the cam cover, inlet manifold, distributor/ignition system, cooling system/water pump and cam drive system) was completely different. I have factory race department dyno testing sheets from 1970 where they are still identifying the 'S20' as the 'G8B', probably through force of habit.

Kats, Do you think the design of the emblems is a "Maru Z"?

I too am interested in why the English version may be shorter? I certainly hope some home market car details were not omitted? That would be a shame. I'm also curious about this S20 powered LHD S30Z chassis. Alan are you willing to share photos of this car? Does it still exist?

Carl, can I ask who chose the title of the Lulu.com-published translation? Was it Uemura san himself, or was it (ironically) prompted by a change in target market? The original book - published by Tokyo Tosho Shuppan in June 2014 - was titled 'Fairlady Z Kaihatsu No Kiroku' (roughly translating as 'Fairlady Z Development Record') and also covers some of Uemura san's work on the S130-series. Also, the original book was a hardback with 230 pages. I notice the Lulu.com-published version is much shorter at 114 pages. Is that because of a change in format/sizing, or is this an abridged version with some original content not included for some reason? Thanks, Alan T.