Crankcase Pressure Testing

Nacho · Post by **Nacho** » Mon Jan 16, 2006 5:28 pm

What is the purpose of the crankcase pressure test?

I'm guessing it's got something to do with testing to see if it can withstand pressures on a turbo engine.

Anyone know what pressures the 6A12 can withstand? Anyone with a turbo done this test before? What does this test involve? Does the engine have to be taken apart?

Post by **Bennoz** » Mon Jan 16, 2006 5:41 pm

Usually done to see if any seals or gaskets are blown or about too....

Someone with an oil pressure gauge could tell you what the 6A12 usually sits at. The engine should be assembled to do the test. Never actually seen it done thou...

EURO · Post by **EURO** » Mon Jan 16, 2006 8:34 pm

its not only seals etc, it is often used to determine whether you have blowby ... if you have blowby, there will be positive crank case pressure... and thus many oil leaks, etc...

a compression test will determine whether you have problems with internals.. and then they open up the engine to check rings etc....

I need to get one at some stage.. as my engine started leaking 12 months after the seals had all been replaced.

mr_bishi · Post by **mr_bishi** » Wed Jan 18, 2006 7:18 am

You will have blow by on any engine,but i guess this test measures whether it's excessive or not.

Nacho · Post by **Nacho** » Wed Jan 18, 2006 11:24 am

So wouldn't it have anything to do cracking when you stick an obscene amount of boost on a turbo engine?

Post by **Bennoz** » Wed Jan 18, 2006 12:06 pm

Well, mr_bishi will soon find out

Nacho · Post by **Nacho** » Wed Jan 18, 2006 2:12 pm

Really?! What's he doing? I haven't read anything about that.........

Once I've finished my forged internals and upgraded cams and valves I'm looking to put through about 35 pounds of boost. Is there anyway to test that the block won't crack under that much pressure.

Of course given that the gaskets and seals stay intact.

Post by **Bennoz** » Wed Jan 18, 2006 2:14 pm

35 pounds!!

And your gonna race it?? You'll get a whole 1000kms outta that motor. I hope your getting metal head gaskets...

Nacho · Post by **Nacho** » Wed Jan 18, 2006 3:05 pm

Hopefully I can get them made up coz the ones at RPW aren't metal ones. Wouldn't mind racing it one day that's why it has be to AWD. After browsing danny and jeff's threads they've managed around 300kW ATW on 18 pounds of boost using forged internals. Coz I'm doing the whole forged internals package then my target is around the 500-600kW on all fours. But with a boost controller only keep it at a soft 8-10 pounds for daily driving.

Keep the rest on tap for track days and cruises!

d_stroy_r · Post by **d_stroy_r** » Wed Jan 18, 2006 3:48 pm

Nacho wrote:Coz I'm doing the whole forged internals package then my target is around the 500-600kW on all fours.

Can i ask what kind of budget you have?

If you do actually end up doing it, i can't imagine too much change from 50k+

Nacho · Post by **Nacho** » Wed Jan 18, 2006 5:08 pm

The budget is about $50000-$60000 for the works including the purchase of the car.

I've spent 5000 on a 2nd FTO so far. So that leaves me.....

$10k for 6A13 with forged internals
$10k?? for evo v or legnum drivetrain conversion
$10k for upgraded brakes and suspension
$10k?? for turbo and cooling
$5k?? for body kit, paint etc

Doing most of the labour myself where I can. I'm currently still taking out the 6A12 and stripping the car down ready for the panel beater in a few weeks for the chassis strengthening.

Hope that answers your question......

BTW that's $50000 over 3-5 years by the time I'm finished.

d_stroy_r · Post by **d_stroy_r** » Wed Jan 18, 2006 6:24 pm

10 k for suspension and brakes. are you getting 6 pots?

You are doing doing the 4wd conversion?

mr_bishi · Post by **mr_bishi** » Wed Jan 18, 2006 6:25 pm

Bennoz wrote:Well, mr_bishi will soon find out

True Ben,true!.....I don't think i'll bother with 35psi though!

Nacho · Post by **Nacho** » Thu Jan 19, 2006 9:46 am

Yes destroyer I'm the one doing the 4wd conversion and looking for as much support as I can get. I'm having a bit of trouble getting the vital information I need in regard to mating the EC5W drivetrain with our DE3A chassis.

I'm told by the MMC in New Zealand that the wheelbase does not match, and maybe I should fabricate my own drivetrain. Not sure whether that is possible.

I'm currently stripping down my other FTO and the only thing that remains is the engine and tranny, so once they're out and I can get the drivetrain I need, then I can get started on the AWD conversion. I'm also having trouble finding myself an Automotive engineer in melbourne to walk me through what needs to be done to the chassis so the car can be registered.

Nacho · Post by **Nacho** » Thu Jan 19, 2006 9:49 am

Sorry destroyer, and yes I may be getting 6 pots, or even the 10 pot calipers they're selling from Hostile performance.

GPXXX · Post by **GPXXX** » Thu Jan 19, 2006 10:49 pm

Nacho wrote:After browsing danny and jeff's threads they've managed around 300kW ATW on 18 pounds of boost using forged internals. Coz I'm doing the whole forged internals package then my target is around the 500-600kW on all fours. But with a boost controller only keep it at a soft 8-10 pounds for daily driving.

Nacho wrote:The budget is about $50000-$60000 for the works including the purchase of the car.

hey i'm curious, when was the last time you had a major performance project done to a car?

seriously, errr... i don't wanna rain on your parade dude but if you wanna build a 500-600kw atw car (especially an AWD FTO), you're gonna need at least twice your budget if not a hell lot more...

oh, and good luck getting the thing engineered & approved by Vicroads if/when it's complete....

I wish you all the best of luck though, but I feel obliged to say that you should be more careful about your expectations, given the amount of money involved and the amount of work you're getting yourself into - it could turn out to be a very very very expensive regret in the end...

that is all.. CHEERS!

GPXXX · Post by **GPXXX** » Thu Jan 19, 2006 11:18 pm

also, just to put things into perspective (before you start to think of me as a sceptic), a guy I know here in melb had his purple 617kw+ atw R33 GTR built with a 6-figure bill, which involved 2-3 complete engine rebuilds along the way... (and you'd expect it'd be piss easy to squeeze a lot of mumbo out of the mighty GTR engine...

)

some of you might have seen the car before, it's featured in a few mags, and has won quite a few dyno shootout comps at Autosalon events...

if a car with soooo much aftermarket support can cost someone a 6-digit reduction from the bank balance (for the sort of mumbo you're chasing), imagine how much it's going to cost for your 6A13 AWD FTO project...

let's just think about that one for a little hey?

Post by **Bennoz** » Thu Jan 19, 2006 11:25 pm

Its a good point Mikey brings up...

Dont forget - when quoting atw figures for 4wd cars... you will have 2 diffs, multiple uni joints, 4 drive shafts, 4 drive shaft joints, lots of friction, noise & heat being generated by these things. Thats a lot of energy lost.... The loss of power you get there gives a much bigger margin between flywheel & atw figures. The old 30% figure becomes a lot larger.

So in theory for 5-600 kwatw, you'll need a good 800kw at the fly... from the 6A12 that wont be possible, 6A13 maybe... but big $$$$

Dont get me wrong, Im on here all day to try & help folks like yourself with any questions you may have & I'd love to be involved in such a project, but I think the figures you're sprouting there may be a little optimistic

Nacho · Post by **Nacho** » Fri Jan 20, 2006 5:34 pm

Yeah I fully understand what you guys are saying. But I guess I've already made my mind up, and as soon as I get the parts, I will stick them in my garage until they're ready to go in. I figured instead of spending $250k on a V12 ferrari, might as well go all out with the FTO and make it better than it would be brand new.

We all have a dream car and to be perfectly honest, money is not an issue when you want something that bad. At the moment my main problem is finding the parts and info I need on the chassis of several cars, not the money. And from what I've heard from all you guys numerous times on this website, if you're willing to cough up the $$$ you can do anything! Correct me if I'm wrong.

d_stroy_r · Post by **d_stroy_r** » Sun Jan 22, 2006 2:15 am

Can i ask how the hell do you get the money?

Good luck with the project. Hope everything gets sorted.