Billet Girdle

[shanef]

Well after almost 12 months since the last one, i've just had machined 2 new billet girdles. One to suit a rwd RB and another to suit the 4wd rb30. This time it replaces the entire std girdle.

Testing will be carried out on an engine in the next 2 months.

[Duncan]

they look the goods....but the real question......tell em the price son.

[dano4127]

[2rismo]

they look the goods....but the real question......tell em the price son.

"More than you can afford pal, billet!"

[dano4127]

Few more shots:

[FineLine]

What!!! No more of the dancing Ranga.

[proengines]

Very nice work! what material did you make it from?

[murrayis]

Dam, Very nice work!

[Jdfnq]

What!!! No more of the dancing Ranga.

+1

[dano4127]

ok so we all want to see the dancing girdle maker hey?

Edited February 10, 2009 by dano4127

[shanef]

they look the goods....but the real question......tell em the price son.

wont know exact price until i get the invoices, as soon as i know i'll post it up

Very nice work! what material did you make it from?

thanks. material is 7075

[R32 Driver]

going to be a stupid question but i want to know lol

whats the advantage of this over a stock rb30 one with a 4wd adaptor plate? (for GTR)

*puts flame suit on*

[shanef]

going to be a stupid question but i want to know lol

whats the advantage of this over a stock rb30 one with a 4wd adaptor plate? (for GTR)

*puts flame suit on*

the 4wd adapter is only a 'spacer', its does not tie into the girdle to the block.

this girdle ties everything together, the block, crank and girdle

[Adriano]

Do you forsee any issues with the difference in themal expansion between the block and girdle?

Edited February 10, 2009 by Adriano

[shanef]

Do you forsee any issues with the difference in themal expansion between the block and girdle?

Yes the thermal expansion rate of alloy is greater than that of cast iron, but i dont see it as a great threat to the integrity of the girdle.

When the alloy heats up, it will expand at a greater rate than that of the block, however there isnt any real where for it to expand to, it will actually give a tighter lock into the block.

This is one of the observations we'll be making with the test engine.

[STATUS]

i think adriano was thinking the same thing i was. My concern (possibly unfounded) is that differrent thermal expansion rates would play with bearing crush... and or centricity

Edited February 10, 2009 by URAS

[shanef]

That is true it could. We'll soon find out though

If theres any other areas that have questions over them, bring them to light so we can get some answers with the testing.

[GTR1993]

I don't think you will have an issue, SR20 (etc) don't seem to suffer and they are pretty much the opposite of what you have just done.

[Chris Wilson]

Beautiful!! Is there any reason you couldn't make one in steel, given a big enough lump of material? Here in the UK it's very hard to get decent line boring and honing done, they often end up a real pig's ear. How do you go on in Oz?

[shanef]

Beautiful!! Is there any reason you couldn't make one in steel, given a big enough lump of material? Here in the UK it's very hard to get decent line boring and honing done, they often end up a real pig's ear. How do you go on in Oz?

Cost. Itd be more expensive to make one from steel due to the time required in machining. Also steel isn't all that good for dampning harmonics, and add to that the massive weight of the thing.

We dont have a problem with line boring/honing if you use the right people.