Crank Strength And Upgrading Options.

[T04GTR]

really? im suprised at that? why did they break?

[Spoolup]

Prototype crank is about to go into production, rods and pistons have been designed.

Still all a few months away - but its all happening :-)

Any news spool on the 3.4L Kits?

Edited March 9, 2009 by Spoolup

[N1GTR]

Still the same price guide Brad? I bet a lot of people are wanting to ask you this

[R.I.P.S NZ]

The 3.4 should be very interesting, did you stick with 86.5mm bore and what style/shape of rod did you chose?

I presume you've made it so its a drop in kit for a stock block?

Rob

Edited March 9, 2009 by R.I.P.S NZ

[Spoolup]

The pistons are 20 thou over so ( 86.5 ), they will also be available in 40 ( at some point ).

The rods are a custom H Beam.

Drop in kit for stock block is the aim :-)

[bubba]

oooooooooooooooo and I'm just about to pull my engine out.. must.. resist.. temptation.. to.. delay.. and.. go.. 3.4L..

[R.I.P.S NZ]

The pistons are 20 thou over so ( 86.5 ), they will also be available in 40 ( at some point ).

The rods are a custom H Beam.

Drop in kit for stock block is the aim :-)

Cool, what is the actual cc rating with the 86.5mm bore?

Rob

[T04GTR]

will there be enough room for the oil squiters? not that everyone runs them but...

[Spoolup]

I never even considered oil squirters in the design - so Ill wait until I get the crank and will have to see.

[shanef]

they dont come std with them so f**k them i say

[N1GTR]

+1 to shanef's comment. They go well enough without squirters

[FineLine]

+1 to shanef's comment. They go well enough without squirters

And he put it so eloquently.

[N1GTR]

...as always

[T04GTR]

pffft. whatervaa......... just anticipating someone thats prepared to spend 6k on a rotating assembly might want oil squirters. not me but im not everyone.

just have a japlish disclaimer, oil of the squirter instalation faliure...

[Marko R1]

I have never had a RB26 in the 240z, its always been a RB30, stock block, stock crank, RIPS wet sump etc and anyone who says a stock 30 crank won't rev hard or is limited to 7500 etc is talking rubbish

http://nz.youtube.com/watch?v=nHLfRseF_F4

http://nz.youtube.com/watch?v=G6qtA0_kQUc

9500-10,000 rpm during burnout

Rob

everytime i see this 'cocaine' car on the strip i get goose bumps - sounds better than a moaning hottie

[Lithium]

The thing busted out four 7second passes today too, not bad for a stock crank!!

[Marko R1]

congratulations rob!

and u have this car for sale!? why sell such a beast

[Gerg_R31]

to get a comp ratio here is 1 formula i work with

bore x stroke (bore =86.5mm stroke =95mm)

86.5 x 85.5 / 4 =1870.5625

1870.5625 x 3.142 x 95 = 558344.2006

558344.2006 / 1000 = 558.3442

litres

558.3442 x 6 =3350.0652 (the cubic centremetres of the block)

3350.0652 / 1000 = 3.3500

Deck height

i wont be running one but the formular is the same as the bore x stroke formular just replace the stroke with the deck height measurement

Head Gasket

I HAVE NOT REMEMBERED A MEASURED HEAD GASKET THIS IS A ROUGH GUESS

similar 2 the bore x stroke just replace the stroke with the squashed thickness of head gasket and measure the bore of the gasket, or could always CC it with a burette

i.e

87 x 87 / 4 =1892.25

1892.25 x 3.142 x 0.9=5350.9045

5350.9045 / 1000 =5.3509

Head CC

mines 62cc's atm

Piston dish/dome

if i get the kit id run a 12cc dome

add deck height, head gasket, head cc's, piston dish cc's (minues if dome)

0 + 5.3509 + 62 - 12= 55.3509

add the bore x stroke with the above

55.3509 + 558.3442 = 613.6951

devide answer with the above

613.6951 / 55.3509 = 11.08

11.08:1 is the compression ratio id be running

[R.I.P.S NZ]

congratulations rob!

and u have this car for sale!? why sell such a beast

I want to get into something lighter, its about 200kg over weight for the Pro Import class I run in but I don't want to strip it out to be a full race car, as it is, it still has glass windows (except doors), steel hatch etc, just needs headlights and wipers back in and its road legal again for someone else.

Rob

[Gerg_R31]

any updates yet?