Datsun 280ZX IMSA GTU replica race car build...

Restores, Revamps and Repairs

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Grunzter
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Location: Epsom, Auckland

Datsun 280ZX IMSA GTU replica race car build...

Post by Grunzter » Sun Aug 24, 2008 8:50 am

Hi All,
After looking at Martin's 240z build you cannot help but get interested back into your own builds...
So below are a few pictures of my engine mockup.
The real engine is still being worked on in the engine room, all parts are there just into final head work...

The engine is a 3.1L L28, dry sumped, fuel injected...

Next step is to mount the dry break valve & fuel pump, finish the plumbing which should be over the next week or so.
Then its time to complete the roll cage and get the lower arms sorted.

All the other parts are on the shelf waiting there turn at pre assembly, on completion the car will be fully stripped for painting.

Enjoy regards Grant.
Attachments
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Front view showing oil cooler & radiator etc
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Induction system & dry sump pump
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Front brakes, looks small by todays standard but still 6pot with HD curved vane 12.2"x1.5" discs... same on rear except LD and 4pots...
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Last edited by Grunzter on Sat Apr 28, 2012 8:13 pm, edited 3 times in total.
1981 280ZX #33 IMSA GTU Race Car ...not yet finished...
(Sold) 1984 300ZX Z31 2+2 Turbo
(Sold) 1980 280ZX 2+2

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Grunzter
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Joined: Mon Mar 13, 2006 4:49 pm
Location: Epsom, Auckland

Post by Grunzter » Sun Aug 24, 2008 8:54 am

A few more pictures...
Attachments
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Interior showing pedal box and cut out for sequential shifter, otherwise empty...
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Fuel cell and oil tank...
Small DSCN3483.JPG (109.28 KiB) Viewed 12263 times
1981 280ZX #33 IMSA GTU Race Car ...not yet finished...
(Sold) 1984 300ZX Z31 2+2 Turbo
(Sold) 1980 280ZX 2+2

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nustad
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mmmmmmm

Post by nustad » Sun Aug 24, 2008 10:13 am

Looking great - love the induction - its going to be worth the wait - keep the updates coming.

Great to see some builds that all about living life large!
72 240z plus bits

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ZMAD
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Post by ZMAD » Sun Aug 24, 2008 12:09 pm

Good one! Surely to be a racecar of some discription. Love the workshop you've got.
All Nissans are racecars.

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Grunzter
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Post by Grunzter » Sun Aug 24, 2008 4:35 pm

Induction system is from speedtech in Australia, it is 50mm EFI throttle bodies mated to a MoTec M800 ECU.
The inlet manifold is custom made to get the big bore and straight path to the valve, not available with any off the shelf item from Japan...
Engine has been repositioned more to the right to get it all to fit.

Wish the workshop was mine, but it is in fact 'Cook Motor Racing' workshop.

Car is to be a replica of the 'Bob Sharp Racing' IMSA GTU 280zx, body work included.
Main difference is bigger things like bigger wheels, brakes, engine capacity, but in keeping with the original theme...

Cheers Grant
1981 280ZX #33 IMSA GTU Race Car ...not yet finished...
(Sold) 1984 300ZX Z31 2+2 Turbo
(Sold) 1980 280ZX 2+2

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Grunzter
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Location: Epsom, Auckland

Post by Grunzter » Thu Oct 02, 2008 1:38 pm

Another small update.
Seats are in, as is steering column.
Need to find some different remote reservoirs for the brakes & clutch as the Wilwood units are to tall.

Fuel Cell plumbing pretty much done, as with fuel lines...

Test fitment of wheels all ok, with some 'Trademe' tyres.

Suspension modifications nearly complete for test fit and upcoming wheel alignment!
Same with rear brakes, not far away from being installed.

Next is rear body work to go on to confirm setup heights etc.
Attachments
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Steering column, sequential shifter & peddal box.
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Small DSCN3598.JPG
Radiator tank & fuel lines
Small DSCN3598.JPG (201.68 KiB) Viewed 12232 times
1981 280ZX #33 IMSA GTU Race Car ...not yet finished...
(Sold) 1984 300ZX Z31 2+2 Turbo
(Sold) 1980 280ZX 2+2

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Grunzter
Posts: 327
Joined: Mon Mar 13, 2006 4:49 pm
Location: Epsom, Auckland

Post by Grunzter » Thu Oct 02, 2008 1:44 pm

more photo's
Attachments
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Rear wheel dangling... 18x11 & 295/30-18
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1981 280ZX #33 IMSA GTU Race Car ...not yet finished...
(Sold) 1984 300ZX Z31 2+2 Turbo
(Sold) 1980 280ZX 2+2

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Andy
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Post by Andy » Fri Oct 10, 2008 9:50 am

Good one Grant looks great, good to see project cars contributing to the world wide credit crunch :D

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Grunzter
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Post by Grunzter » Fri Oct 10, 2008 6:01 pm

Hi Andy,
Thanks for the good words.
They same consumer spending is good for the economy, so I am trying to give NZ a hand...

It will be going for its first wheel alignment next week to conclude the suspension geometry.
Then over the next few weeks works will be:
- finishing suspension
- mounting rear brakes
- making & installing dash & instruments
- finishing roll cage
making it not to far from seeing a panelbeater...

Grant
1981 280ZX #33 IMSA GTU Race Car ...not yet finished...
(Sold) 1984 300ZX Z31 2+2 Turbo
(Sold) 1980 280ZX 2+2

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Grunzter
Posts: 327
Joined: Mon Mar 13, 2006 4:49 pm
Location: Epsom, Auckland

Post by Grunzter » Thu Oct 30, 2008 11:40 am

Its finally on its wheels!
Final resting height should be ~25mm lower, but at this stage lots more bits to go in to weigh it down...
Rear shock adjustment is at its lowest, so may need to machine another circlip groove to re-center threaded section.
Front to be lowered down the same, maybe even ~30mm, but plenty of adjustment still.

Hopefully dash should be all complete by early next week.
Remote reserviors are being installed today.
Carbon bonnet is on!

Roll cage gets finished next week.

Then it would be time soon for the new roof & fibreglass experts... not to mention the wiring experts...

Still lots to go, but first time it actually looks like a car!
Attachments
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1981 280ZX #33 IMSA GTU Race Car ...not yet finished...
(Sold) 1984 300ZX Z31 2+2 Turbo
(Sold) 1980 280ZX 2+2

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Grunzter
Posts: 327
Joined: Mon Mar 13, 2006 4:49 pm
Location: Epsom, Auckland

Post by Grunzter » Thu Oct 30, 2008 11:43 am

...no this is not the steering wheel, its the flywheel!
(Clutch is Tilton 5.5" triple plate race)
Attachments
small DSCN3785.JPG
small DSCN3785.JPG (76.81 KiB) Viewed 12153 times
1981 280ZX #33 IMSA GTU Race Car ...not yet finished...
(Sold) 1984 300ZX Z31 2+2 Turbo
(Sold) 1980 280ZX 2+2

BRONZEE
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Post by BRONZEE » Thu Oct 30, 2008 4:43 pm

A bit of a competition here, between the two project cars. Very exciting! Oh, by the way is that the famous bonnet that ended up a couple of paddocks away in the big winds last year? :P

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Grunzter
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Post by Grunzter » Thu Oct 30, 2008 6:57 pm

Hi Bronzee,
No that was the original steel bonnet!
This is a full carbon one from Japan, I would have shed a few tears if it was this one.
First time I had seen it out of the plastic bag today, seems a pity to paint it as it is so shiny and the carbon look is cool!
Grant
1981 280ZX #33 IMSA GTU Race Car ...not yet finished...
(Sold) 1984 300ZX Z31 2+2 Turbo
(Sold) 1980 280ZX 2+2

BRONZEE
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Location: Auckland

Post by BRONZEE » Thu Oct 30, 2008 7:19 pm

You could always leave it CF, but probably wouldn't work with the look you're trying to achieve??

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Grunzter
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Post by Grunzter » Fri Oct 31, 2008 7:57 am

Yeh, look is to be the same as the works car, all advertising decals included!
Attachments
Sears_Point-1980-07-27g-033.jpg
Sears_Point-1980-07-27g-033.jpg (54.79 KiB) Viewed 12125 times
1981 280ZX #33 IMSA GTU Race Car ...not yet finished...
(Sold) 1984 300ZX Z31 2+2 Turbo
(Sold) 1980 280ZX 2+2

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