Datsun-240z Vs Fairlady-z432

[bartsscooterservice]

On ‎5‎-‎5‎-‎2017 at 2:14 AM, kats said:

An interesting modify of my 240ZG, this is the brace for the throttle pedal pivot. The original owner's memo said " throttle need to be more

smooth when depress .." This is the solution , a dealer mechanic created unique parts, I think. Some car magazines claimed same thing, the throttle pedal was stiff and hard to control when start rolling.

Kats   

Interesting, this seems to be a complaint with many s30 owners. And the " sticky " throttle. Once I had my rebuild carbs back, the issue was no longer there, so I think alot of problems are in the butterfly shafts, because they actually wear in " oval " , the pedal action is not smooth anymore

Edited May 18, 2017 by bartsscooterservice

[HS30-H]

20 minutes ago, 240260280 said:

Hi Alan,

Not much info on the part. It appears in a photo of shell HS30-00741 in Australia.  The photos were taken a while ago.

 

OK, as I suspected, it's an example of custom/privateer fabrication making use of the factory-installed captives in the rear header rail.

I guess it proves what they *could* be used for, and may well have been planned by the factory to be used for, but (as far as I'm aware) they didn't.

As mentioned - I think - way back, there were at least two different positionings for the two vertical drops in the factory roll over bar/'safety bar'. There was the 'normal' gap width (as seen on the circuit race cars and the Sports/Race Option parts sold to the general public) and the factory Works rally cars, which had a wider gap between the vertical drops, to allow them to carry two spare wheels/tyres.

I think the gap between the two sets of captives corresponds to one of the above, but I'd have to go to the garage to check.... 

[kats]

On 2017/5/18 at 11:12 PM, bartsscooterservice said:

Interesting, this seems to be a complaint with many s30 owners. And the " sticky " throttle. Once I had my rebuild carbs back, the issue was no longer there, so I think alot of problems are in the butterfly shafts, because they actually wear in " oval " , the pedal action is not smooth anymore

Hi , thank you for the information, the shafts are notorious when they are getting old, I want to check my SUs after seeing your reply. 

And also some car magazines reported on "new car test" , the throttle pedal was sticky. My blue 240Z had same sticky throttle problem when it was restored like new . Maybe ball joint linkage?

Kats

[kats]

Thanks Blue and Alan, 

We want to know what purpose does these nuts have for ?

Kats

[Zup]

1 hour ago, kats said:

Maybe ball joint linkage?

That has been my experience.

I've read about all sorts of solutions from cutting and repositioning the arm on the throttle lever at the firewall, to bending the linkage rods, to giving up and installing cable linkage. The engineers knew what they were doing---it is not a flawed design.

I fought with the sticky throttle, but when ALL of the linkage was cleaned thoroughly and adjusted to the Factory Manual specifications it works smoothly without sticking or binding  and is very responsive with a light feel at all speeds.

 

[240260280]

I agree.  As well there is a heck of a lot of adjustment in the linkage.

On some cars I repaired with loose linkage, I shortened rods and re-threaded to allow the nylon sockets to screw further in.

A few important steps for adjustment that may be missed:

 

0. As Zup says, clean and lubricate all joints.

1. Do not use the fast idle setting screw as a stop (this screw is only used for tuning).

2. Adjust all rods to take up slack (shorten and cut new threads if needed)

3. Adjust maximum-throw stop and lock nut behind gas pedal

4. Make sure choke wires are not holding jets down at idle. A bit of slack is needed.

 

 

[bartsscooterservice]

On ‎27‎-‎5‎-‎2017 at 1:52 PM, kats said:

Hi , thank you for the information, the shafts are notorious when they are getting old, I want to check my SUs after seeing your reply. 

And also some car magazines reported on "new car test" , the throttle pedal was sticky. My blue 240Z had same sticky throttle problem when it was restored like new . Maybe ball joint linkage?

Kats

Personally I don't see the problem in the ball joints ( after all I am still using the old " worn out " ones ), or the entire linkage, but just with the carbs. Mine where done by Ztherapy, so not sure what they did ? Found this on their website:  Reman Carb Body 69-72 ½ 240Z 3 or 4 Screw w/ZT Roller Shafts (pair)  .

But there's no friction in the linkage ever since, and the gas pedal goes so light....it's better than a new car. ( I have to note it is sensitive on bumpy roads, but I anticipate on that by backing my foot off) So I guess the shafts in both carbs ( Original state ) cause to much friction in the whole linkage.. ?

[kats]

On 2017/5/29 at 5:55 PM, bartsscooterservice said:

Personally I don't see the problem in the ball joints ( after all I am still using the old " worn out " ones ), or the entire linkage, but just with the carbs. Mine where done by Ztherapy, so not sure what they did ? Found this on their website:  Reman Carb Body 69-72 ½ 240Z 3 or 4 Screw w/ZT Roller Shafts (pair)  .

But there's no friction in the linkage ever since, and the gas pedal goes so light....it's better than a new car. ( I have to note it is sensitive on bumpy roads, but I anticipate on that by backing my foot off) So I guess the shafts in both carbs ( Original state ) cause to much friction in the whole linkage.. ?

Thanks everyone, 

 bartsscooterservice, I am looking at ZT website, seems to me the roller bearings are good for the butterfly moving, they will give much smoother and almost trouble free for years to come. 

I saw ZT's 920 gold 240Z at Las Vegas convention 2000, I took my Blue 240Z there too.

I am afraid my SU's shafts are sucking air due to wear. 

And how is everyone doing with the SU damper oil? 0-20W is stiff for the pistons movement, I will try much thinner oil.

Kats

Edited June 3, 2017 by kats

[Mark Maras]

54 minutes ago, kats said:

Thanks everyone, 

 bartsscooterservice, I am looking at ZT website, seems to me the roller bearings are good for the butterfly moving, they will give much smoother and almost trouble free for years to come. 

I saw ZT's 920 gold 240Z at Las Vegas convention 2000, I took my Blue 240Z there too.

I am afraid my SU's shafts are sucking air due to wear. 

And how is everyone doing with the SU damper oil? 0-20W is stiff for the pistons movement, I will try much thinner oil.

Kats

 Try A.T.F. I ran it for twenty plus years and never found a reason to change.

[kats]

Hi Mark Maras,

ATF ! I have never imagined it , thanks for the information.

Kats

[kats]

Here is my 12/1971 automatic 240Z, it runs very nice.I do not know what oil is in it. 

Kats

Edited June 3, 2017 by kats

[Gav240z]

I'm pretty sure I've heard of using Sewing machine oil also, but I can't see what viscosity this is.

http://www.ebay.com.au/itm/Singer-Sewing-Machine-Oil-100ml-bottle-All-Purpose-Industrial-Domestic-/361836074079