z-spec

This system is already used in the 60e by BMW in a F2 formule car and been build by Dr Ing Apfelbeck as a 4 cilider engine , and been called the Apfelbeck engine

we have done quite a few cages for 240/280z here in Netherland , al to meet the FIA regulation , and by using 4130 tubing

John , i found out about the lsd , its a Torsen T2 , the 4.44 is right , you are right about they probably do not have it in the US ,

John , i have got a Subaru 180 diff 4.44 ratio with a gear type ( no plates ) lsd specialist ?? told me that it should be a viscous but its definetly not . I want to use inner CV from Subaru and i made new flanges for the outside to fit 110 diameter Lobro CV without any spacer , i bought the diff but i still not know of witch type and year Subaru it is , Regards Adrian , www.va-motorsport.com

If you need it for defrost the window , you can put a electric heated windscreen in , we made a batch we use for race and rally cars here i EU .

This is the early 1970 one , I wil send some pictures from what we have done til now . This year we gone make some place in your garden , because i hear some rumour that your wife was complaning , but looking for a running car 70/71 with not much work .

the minimum strenght requirment for us is 350 N/mm2 and that is not much , its like CDS 35 (steampipe) , what we use is 25CrMo4 (4130) with a strenght of 650/750 N/mm2

You are right about that , working with inches is much more thinking for us , but 2500 lbs how much is this compared to Newton or Kg ? And what is the actually different between a SCCA legal cage and a FIA legal cage ? I think there must be a way that it meets both regulation . We can work with thinner wall for the tubes we use but we have to make a stress calculation from the cage , and save up to 1/3 of the total weight .

For Classic racing cars we have to use 40 x 2,0mm or 38 (1,5") x 2,5mm (0.25") , and are alowed to fix it to the shell at 6 point by bolting or welding , but there is one exeption , when we fit the V bars into the main hoop we are allowed to use two extra points on the transmission tunnel ,That also means No welding or bolting to the pillars and roofsides .

we have o respect annexe J 253 from the FIA for classic cars this is annexe K from the FIA you can find every thing on www.fia.com . About SCCA i know not much . We build about 70 rollcages a year ( not only Datsun ) and do our own certification .

I have seen them some where , but try your local machine shop to make them ,

I wondering wath rod lenght and bore they use on this block ? I really looks like a L24/L26 block if you look at the freeze plug line up .

There are different ways to do it i,i made them with fixed track and just adjustable toe in/out they are made from thin wall 4130 tube

Tony , a have a contract with Sprite IT til 2012 , there is only one thing , we did not talk about money , bdw there are lot off flights into Africa from Brussels Airport .

To build the Z to beat we should talk again about our sponsor contract .

As long z cars not beating porsches and bmw here in EU , scruteneers only wil check seatbelt , seats and fire extiguisers , and the point is cars from 1966/1972 ( Gr G annexe K ) is not the most popular FIA racing class they have still poor field . The most popular class is pre 66 or post 72

Tony , 6 Hour Spa is 27 sept. , We enter two Shelbys one from the Belgian equipe who crashed heavely last year in practice and the second car I share with the two South Africans , your welkom I also gone bring the red 240Z to Spa , but we do not race it ( yet )

We gone race these cars in Europe and we do not need 400Bhp , we stick to FIA regulation with classic racing , classes uptil 1965 , classes uptil 1972 , and for us it searching to get as much benefit out of a L24 block , for sure it is easyer to take a L28 block . But everybody with a little knowledge about L serie engines can see the differents between a L24 and a L28 by miles away . We are professional in the busines and had already a lot of succes in classic endurance racing in Europe with v8 cars . We look to your period cars to challange the porsches in Europe and we are already compete with one 240Z in rallys, circuit racing wil be the next move but not a lot of people understand about FIA regulation , as long you respect these you can drive in beautyfull event like Nurburgring Marathon , Spa 6 Hours and even Le Mans Classic I do not ask stupid questions i just ask for people with some expiriece with were i ask for . www.va-motorsport.com Regards Adrian,

The pig is still sticking his nose in the mud , How was your bullfighting adventure in Spain ? My idee is to bore a L24 to max bore even if i go trough the water pockets and put ± 3mm thick sleeves into it , this is what we also do with Turbo Cosworth engine , but what worries me is the strenght and rigidety of the block , Tony have ever see a gurdle on the main caps os a L serie like they do with ford and chev v8 . Regards Ad ( Spa 6 Hours is becoming verry close and we have plenty of food and beer )

On my track car i had a L24 block with a modified E88 head and standard bore and stroke , and 45 weber carbs, it use to have 220Hp mesured on the crank . I swop the crank with a L28 , and compensate the compresion to 10.5-1 like it was . but I wondering or sombody has expiriece with bore a L24 block or even sleeve a L24 block to a bigger bore ?

Can anybody tel me what the maximum bore on a L24 engine block is I want to build a race engine based on a L24 block .

On a 280z If you take the reinforcement for the later type of the bumpers , the reinforcements to carry the hevy er doors , pedalbox and pedals are as twice as thick as the early 240z .

there are quite a lot differents between body shells 280 shell has a totaly different floorpan than a 240 , mutch lower and thicker chassis rail ,front radiator pannel is lower , the later type 280 do not have the vent holes on the front innerwing what goes through the top chassisrail , the fuel tank is bigger and the sparewheel wel is just about half as high . the rearstrut towers are about 2,5" higher this is compared with a 240 shell . a early 240 do not have the storage compatiments behind the seats i found out also about the reinforsmentplate for the brakebooster/cilinder they have changed quite alot there are aready three different ones for the 240 We did lot of researce because we do race and rally Z s i Europe .