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Id assume the stock girdle strengthens to front to back flex, and this would strengthen the side flex

but I'dsuggest to speak with platinum racing for more details on it, im aware they have 2 products 1 is the brace (purple) the other is a brace and awd conversion (blue)

Sump rail and girdle are milled for exact height, the edges of the girdle are machined at an exact angle on a mill, 32 holes are drilled and tapped on the sump rail and girdle for it to bolt onto

Yeah but there is a good chance only 1 in 50 people will actually understand the details, which i have skipped some detail (i can add all the maths with all working out in as well if you like, would be a very long post :P )

Oh and I've ground 29 thou off so far, re cc'd it and its now at 64cc's which would make it 8.67:1CR (before with the 69.6 would have been 8.06:1CR)

And Fatz you think Skylines are high maintenance wait till the little one pokes it's head out omg they eat any spare time whole.

I have an 11 week old and between work, house and him I am flat out and f**ked if I could tell you where all the time actually goes hehe but when they look, smile and laugh at you it's all worth it.

Well i took another 15 thou off, im at 62.1cc's

ok the comp ratio maths

SV

bore x stroke

86.5 x 86.5 / 4 = 1870.5625

x 3.142 x 85 = 499,571.13688

/ 1000 = 499.57113 (SV)

Engine cc's

4.99.57113 x 6 = 2,997.42678cc's

/ 1000 = 2.99743 litre

CV

Head gasket

88 x 88 / 4 = 1936

x 3.142 x 1.2 = 7299.4944

/ 1000 = 7.29949

Deck to top ring

86.5 x 86.5 / 4 = 1870.5625

x 3.142 x 6 = 35,263.84425

/ 1000 = 35.26384

85.65 x 85.65 / 4 = 1833.98063

x 3.142 x 6 = 34,574.20284

/ 1000 = 34.5742

35.26384 - 34.5742 = 0.68964

Piston dome volume

85.65 x 85.65 / 4 = 1833.98063

x 3.142 x 1.397 = 8,050.02689

/ 1000 = 8.05003

Volume around dome measures 1.8cc's

8.05003 - 1.8 = 6.25

piston above deck height

85.65 x 85.65 / 4 = 1833.98063

x 3.142 x 0.1016 = 585.4565

/ 1000 = 0.58546

7.29949 + 0.68964 - 6.25 - 0.58546 = 1.15367

+ Head cc's

69.6 + 1.15367 = 70.75367

+ 499.57113 = 570.3248

/ 70.75367 = 8.06 :1

Also did

64cc's = 8.67:1

62 = 8.91:1

60 = 9.17:1

61 = 9.04:1

61.5 = 8.97:1

61.3 = 8.99:1

61.2 = 9.01:1

So that how i worked out it needed between 61.2 and 61.3

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