ryant67

Kenny, Tony might (and almost certainly will) know better, but I will throw my thoughts in here as well since I have spent quite a lot of time with these carbs over the past couple of years now. Fuel should not be getting into the cooling body of your Mikuni. What I suspect is happening here is that you have a damaged, or missing, gasket between the cooling body and the throttle pump assembly, and it is leaking fuel in. There are two lines that run through the cooling body: 1] feeds the throttle pump a supply of fuel 2] runs from the throttle pump to the pump jets Both lines are independent of the cooling reservoir. I attached a pic of the parts and circled the pump jet lines in yellow, and the inlets in red. I suspect the gasket around these parts isn't doing its job, and fuel is leaking in. If it's happening when you apply throttle, then it would very likely be the yellow circled ones.

^ Two GREAT posts, awesome advice guys!!

For what it's worth, I used to have a Recaro Pole Position in my 240Z, and it fit perfectly. It was mounted on recaro rails, onto the stock seat supports. I only took it out because it was too much of a hassle to use day to day - difficult to get in and out of, and horrendous to swivel in when going through McD's drive-thru It was great for spirited driving though, very strong side support.

Thank you sir!

Fair point, Tony. In that diagram, measuring the fuel pressure post-regulator wouldn't be very useful, since it wouldn't in any way indicate what's happening before the regulator, which is where the carbs are getting their fuel, haha! Moving the pressure gauge to immediately before the fuel pressure regulator, perhaps using an AN fitting to plumb to it, would actually allow you to see what your fuel pressure to the carbs is. Would this set up require a specific style of regulator, such as a bypass regulator? I am running the Holley 12-803 right now, before the carbs, but I can't seem to grasp how it would work post carbs, since it would be static.

Great work, it's progressing nicely, wow! The clear coat really makes the CF pop. Thought on the clamshell - does carbon fiber not conduct electricity? There are a lot of live wires in the combo switch, and the clamshell fits pretty closely to it if I recall correctly. I'd probably give some thought to insulating that portion of it on the inside, as a "just-in-case" measure.

That's pretty much what I am planning to do this Spring with my 240Z. I currently have the 'usual' dead head fuel line set up with a regulator before the triple Mikunis, with the fuel line stopped at the 3rd carb, no return. My Holley fuel pump makes one hell of a racket in this setup, and apparently it won't last terribly long in a dead head setup due to overheating with a lack of fuel flow through it for cooling. The regulator in that set up is after the carbs in the fuel flow direction, and it basically bleeds off excess fuel pressure into a return line to the tank. This is ideal, as it should provide a more stable fuel pressure into the carbs. The pressure gauge will plug into an unused output port on the regulator, allowing you to confirm you have your fuel pressure set at the correct level.

It was, I recall seeing it before. Reserve wasn't met, at around $25k-ish I think. Sharp car, not much to dislike, it's clean looking and the interior has been left mostly stock, which is always a plus. Hood vents aren't my style, but hey, he tried something a little different there. Rad support being missing is interesting... Dislike what looks like a DIY front grill - although I also dislike the JDM one that looks like that as well. Some pics of the underside of the car would be nice. Biggest problem with that ad is the line "JUST TO MUXH TO WRITE UP THIS IS SHOW QUALITY BIG $$$$$$$$$$ MONEY INVESTED " If you want top dollar for your BIG $$$$$$$$ MONEY INVESTED car, you should NOT be too lazy to at least list some of the modifications on the car, especially when it's on ebay. Saying new suspension and upgraded brakes doesn't tell the buyer much at all, especially when you lace those modifications with exaggerated superlatives. Sorry for the little rant, just a personal pet peeve and I remember the headaches of dealing with listings like this when I was looking to buy my Z a few years back...

They have bought a few Hybridz car now I think. I remember this thread a while back: http://forums.hybridz.org/topic/98624-1971-240z-v-8/ They do seem to be willing to pay more than people here in NA will for these cars, and from what I have heard, old S30's prices are pretty exorbitant in Japan.

I sometimes use this handy feature when warming the car up on cold nights in Spring/Autumn - start the car, after a few seconds I can ease off the choke, pull the key, lock the doors, and go inside for 5 minutes while it comes up to temperature.

Since this thread has been bumped, it's also interesting to note that back in 2011 the exchange rate was $1 USD = 76 yen. 3 1/2 years later and we are now at $1 USD = 116 yen. So basically, if you ever wanted any of those expensive and exotic Japanese S30 parts, now would be a pretty good time to buy!

Very cool, can't wait to see how it turns out. Quite the process!

So sorry to hear this, what a nightmare... At least no one was hurt though, so it could have been worse! No interest in finding a decent rolling shell and starting over?

Nothing terribly fancy, but I took some pics tonight since the car will be going into winter storage in a few days.

Looks very impressive, thanks for sharing! Great PDF with info on their site -http://www.mangoletsimanifolds.com/manifolds/datsun.html

People need to realise that if/when you ask a question online, the person answering isn't getting squat for taking the time to help you. With that being the case, you forfeit any rights to politeness or standard of service - be thankful for what you get. I think it's pretty amazing, the information available on forums such as Hybridz. There is a lot on here that 20 years ago would have been privileged information. There are people on here that have spent thousands upon thousands of dollars to grind in the knowledge they have, and they are willing to share it with others free of change. Anyone that dares to complain about the manner in which this free information is shared, well... they need their head examined. Unfortunately we live in an age of entitlement... Nice to be notorious though, eh John!

Quite pleased with how my interior looks now. Refreshed the diamond pattern vinyl and shift/brake boots. Switched to Autometer Ultralite gauges, which add just that little bit of pop, and have a nice old school look to them. PO cut holes in the door panels, so I have stuck with that, but stacked two 1" thick speaker mounting rings between the speaker and the door for better clearance on a 6.5" speaker. The MoMo competition wheel is a pretty standard swap, but it is a great wheel to drive with. Can't see me changing anything here anytime soon. Will likely remove the AEM UEGO wideband gauge from the steering column once my carb tuning is complete - if that ever happens...