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Another Grand (+ 1/2) Down The Tube...

coupe72001

By coupe72001,
in Classic & Vintage (1950's-1980's)

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coupe72001 Mentor

coupe72001

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Thanks again for info.

I had the (nasty, as it turns out) wheel bearings pulled this week, and a new set pressed in yesterday. Im going to reattach the rear trailing arms ASAP, and then reassess the situation. If things STILL aren't running smoothly the valves are next on the job list.

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coupe72001 Mentor

coupe72001

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Ok... I took the car to the NSDOC show and shine and it actually made it there in one piece! It got a good run later that day and went well, but I still think the car is falling short of its full potential.

At the moment the grinding from the rear has gone; clearly the wheel bearings were absolutely cactus, and brake pedal pressure is good. I am yet to try experimenting with different proportioning valves, but if things go well over the next while I may not need to.

The engine is also going much better than previously, but the power still seems to drop off a little too early, around 5,500 rpm - pushing on to 6,000 rpm and above just seems to upset the old girl. I am acutely aware of this because on the few good runs that I have had over the last year she would scream up to 7,000 with no signs of resistance. Something just isn't quite right.

Next up I'm going to move the electric fuel pump to the rear and insulate the fuel lines with heat-resistant wrap to see if that makes any difference.

(many thanks go to Blind Elk for the tips and the chat on the weekend).

mastadd Proficient

mastadd

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Ok... I took the car to the NSDOC show and shine and it actually made it there in one piece! It got a good run later that day and went well, but I still think the car is falling short of its full potential.

At the moment the grinding from the rear has gone; clearly the wheel bearings were absolutely cactus, and brake pedal pressure is good. I am yet to try experimenting with different proportioning valves, but if things go well over the next while I may not need to.

The engine is also going much better than previously, but the power still seems to drop off a little too early, around 5,500 rpm - pushing on to 6,000 rpm and above just seems to upset the old girl. I am acutely aware of this because on the few good runs that I have had over the last year she would scream up to 7,000 with no signs of resistance. Something just isn't quite right.

Next up I'm going to move the electric fuel pump to the rear and insulate the fuel lines with heat-resistant wrap to see if that makes any difference.

(many thanks go to Blind Elk for the tips and the chat on the weekend).

Was that you getting around in the Nissan Shirt?

Ill try and get some pic's up soon

coupe72001 Mentor

coupe72001

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Was that you getting around in the Nissan Shirt?

Ill try and get some pic's up soon

Yep, black T-shirt with a Datsun logo. I was looking out for your 240k's. Did you come with a different car?

Ill post up some pics this evening under the NDSOC post.

coupe72001 Mentor

coupe72001

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He was driving one of my R31's, the fire brigade one.

Hi, I'm sure I know who you guys are now, sorry I didn't introduce myself on the day.

Your R31's were lovely by the way!

cazz Rising Star

cazz

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You know who we are now, so next time come up and slap us on the back like we're old mates lol.

I did like your car BTW. Carbies, and several of them is always very cool.

I love my 31's thanks for the compliment.

mastadd Proficient

mastadd

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Hi, I'm sure I know who you guys are now, sorry I didn't introduce myself on the day.

Your R31's were lovely by the way!

we did have a good chat, i told you about the other car @ center rd, lol, im k's are off the road at the moment :D but soon i hope ill have one up and running

coupe72001 Mentor

coupe72001

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we did have a good chat, i told you about the other car @ center rd, lol, im k's are off the road at the moment :O but soon i hope ill have one up and running

Ahhh! (Slaps forehead) it all comes clear now. Im going to have a look at centre rd probably this week. Good luck with the K's by the way.

Factory 5 Mentor

Factory 5

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there was one in the back of an old warehouse, had flames across the bonnet etc... it was on ebay a year or so ago...

it looks like drew may have bought it as spares??? i dunno

but i have heard they creak and sag a whole lot as the supports are gone from the roof etc.

coupe72001 Mentor

coupe72001

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yeah would be pretty weak, but would be nice to see one.

have seen a couple pics of an R31 Convertable, only 2 were ever made... well by Nissan anyway.

Hi,

Yeah, a mate picked it up to use as spares. It looks ok from a distance, but when you get up close its just a 4 door with the roof crudely cut of and the rear doors welded up! A guy was using it to belt around on his farm!

coupe72001 Mentor

coupe72001

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Good news: I located the source of the grinding noise from the rear. One of the calipers had a lot of play in it. By reefing on the handbrake cable you could see if flopping around. An easy fix!

Bad news: I relocated my fuel pump to the rear, but the car still cant be pushed past 5,000 rpm. Grrrr... I got more out of my L24 running a single carby! Looks like I'll have to see a specialist. Some of the guys and the NSDOC show and shine were squeezing out triple the horsepower that I make from their L series engines.

I haven't forgotten about the mr30 "coupe", Ill get some pics etc up tomorrow.

D

coupe72001 Mentor

coupe72001

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Errr... Took the car to Nissco to try and find out what is draining the power so badly. The consensus is... wait for it... Carbies! That's right, the $1500 rebuild that I am bitching about in the title of this thread is the culprit. The needle and jet setup is wrong, causing the car to run way lean. About 18-20 to 1 air fuel mixture, as opposed to the ideal 13.5 to 1. So now I have to go back to the carby specialist, to ask him politely to sort it out... or Ill be forced to throw a stick on his roof.

I fixed the crappy caliper though.

Interestingly, the rest of the car came back with a fairly clean bill of health.

Anyway here are some pics of the mr30. Mags, you are welcome to come and get the spoiler (which is fairly convincingly attached to the boot) and the glass if you still are interested.

post-26626-1197623785_thumb.jpg

post-26626-1197623911_thumb.jpg

post-26626-1197623974_thumb.jpg

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