Zx-r

SeanDezart

Well-Known Forum User
Bear with me and please read on :

It was Wednesday night at Le Mans after the evening practice had finished (circa 00:30) and I was enjoying a cool beer whilst looking at Cathys' 280ZX 2 seater. It looked great with the neon light flowing over it and made me remember the other one we have tucked away. I'm a sucker for under-estimated things and have always felt that the 280 has had a bad press and circumstances (in Europe) have led them to being the ugly (unwanted ?) sister. Over-valued over here, broken for parts in the UK and most of the lovely looking examples we see everywhere are in standard form.

Are we forgetting the VERY 'chequered flag' history of this car - it even ralleyed if one gets past the track sucesses !

And so a beery thought developed and became stronger as the weekend progressed : make a track-day 280ZX but registered as a road car, keeping it within VHC rules so as to allow it to race one day if desired - over here, VHC is divided into different classes - so what, they all are !
1965 - 1970 - here, an early Z could dominante....
1971 - 1981 - here, a fully homologated 280ZX 2 seater could dominate ;)
In fact, the cars least likely to compete on equal terms with other cars are those that do so well in the UK - 240Zs !

So, I want to construct my 280ZX 2 seater, which has 240Z steering (not power-assisited), no electric windows and no electronic check-list in the dash and technically should be not much heavier than a standard 240Z; Mr F could confirm/deny this as his Ratz was based upon a similar car....?

The car would keep it's standard body look with merely the addition of plexiglass headlamp covers. I would aim to lighten the doors and tailgate and certainly add plexiglass in the tailgate.
I consider the brakes to be ok, the suspension will need upgrading and to initially keep the costs down, I'm not planning on boosting the engine too much - if I can get upwards of a reliable 200bhp out of her then I'd be happy - later, when she runs and if money allows, something more substantial will be considered !

The inside will be stripped out save for the two 'sports' look seats, the centre console and dashboard and if I consider that replacing the door trim won't save much, I'll keep them as well ( it will be a road car after all) !

The overall aim is to have the car at 1000kgs finished !

All that said, I'm going to need help and may be requesting some old ZX parts that you don't want any more - free would be great, but anything reasonable considered.

Advice too is going to be essential and very welcome together with any and all constructive criticism.

The car now has French papers (thanks Boomer), the body-work man chosen - all it requires is the will, Cathys' support and the money to do it. I think I can find all that !

But what colour (s) ? I have an idea but what do you think ? And what wheels ?
 
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Russ

Club Member
White! I don't think there are enough white cars, and isn't white the Japanese racing colour (British racing green, Italian red, French blue etc?)?

Sounds like a great idea, would it being born a turbo'd engine work hugely in your favour for keeping it within regs (for instance in my motorbike drag racing you can have a turbo and remain in the non super mod class if it was born a turbo'd bike).

Good luck, would be nice to have a bit of a 280 revival :)
 

JEZ 280ZX

Well-Known Forum User
250green_280zx.jpg
 

pmac

Well-Known Forum User
Not one of your better ideas.
the stock 280Zx 2 seater is around 200kg heavier that the 240Z. So whatever you do to the 280 someone else can do to the 240Z and still have the huge weight advantage.
Just strip the 280Zx and use the engine/box in a 240Z shell.
Much easier to do. Cheap ish race parts available easily for 240Z unlike 280ZX. Ie fibre bonnet, t gate. doors . wings etc. cage too available easily.
 

Russ

Club Member
I know the weight advantage helps ALL aspects of performance, but wouldn't being born a turbo engine offer it much better potential in the power stakes? I don't know what the class regulations will be but if say he's up against N/As then it'll be in his advantage that he will be allowed forced induction?
 

SeanDezart

Well-Known Forum User
Says on page 8 of the FIA homologation papers that a 2+2 weighs 1210kgs - with power steering and electric windows and maybe even air conditioning - take all that off and more, consider that I'm starting with a 2 seater and.....:unsure:

The turbo option and all-round disc brakes should hold it against 240Zs !

"Newmans' own" can't have been all wrong !
 

pmac

Well-Known Forum User
Weight I used were from Brian Longs two books for a Euro spec 240Z and an early euro spec 280ZX 2 seater.
No doubt that with a works or semi works Newman type budget you could be competitive but a club level I think you will be struggling to get good cheap and reliable power out of the 280Zx turbo. Interesting concept tho.
 

SeanDezart

Well-Known Forum User
But doesn't the early euro spec. 280ZX have recirculating ball power assisted steering and electric windows ?

Mine doesn't ! So remove that weight !

Where is Mr F. when one needs him ?
 

Mr.F

Inactive
The weight figure you require is not that easily found - the nearest I can get involves a bit of intuitive guesswork, but from a table in a book of collected Japanese road tests from Car Graphic, I can see 2 litre S130s in 2 seater format quoted at 1115 - 1150 Kg and elsewhere at 1175 Kg.

There was a Clubman 280ZX campaigned in the UK some years ago - was part of a collection disposed of in the West Country by a now defunct Z specialist.
Dave Epstein at Arizona campaigned an IMSA kitted 2 seater with some success and performed a variety of suspension mods to overcome the S130s inherent deficiency. The trailing arm rear suspension doesn't really lend itself to race requirements...
 

SeanDezart

Well-Known Forum User
So, in essence it could be an original and quick track-day car that could be got down to around 1000kgs ?

Noted, that the suspension isn't ideal - that's not really a surprise looking at the original set-up.
 

SeanDezart

Well-Known Forum User
pmac said:
No doubt that with a works or semi works Newman type budget you could be competitive but a club level I think you will be struggling to get good cheap and reliable power out of the 280Zx turbo. Interesting concept tho.

Cos you can get cheap and reliable power from a turbo engine - 250bhp and more !

The gauntlet has been thrown down and plans are afoot to find a serious sponsor.

This will be a partnership between myself and..........?
 

twoforty

Well-Known Forum User
250bhp from a 2.8 turbo? easy and reliable. Starts getting expensive after 400bhp.
Depends what you call cheap?
 

SeanDezart

Well-Known Forum User
Anything up to 300 is cheap and imho reliable.

300bhp for less than 1000kgs on race set-up is going to sting - non ?
 

twoforty

Well-Known Forum User
would have thought 300bhp would be pretty quick but then again why not have 400 when you have rear wheel drive.
 
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