285 whp! - Page 16

RallyBob · #**226** 08-05-2008, 06:28 PM

Quote:

Originally Posted by SVXRide

Is your issue with the oil pan the pan design itself or the way the oil pickup sets in the pan (or both?) I'd been told by others that the stock pan's baffling wasn't bad (in response to my inquires about running a dry sump)

The baffling is okay, but it needs better anti-slosh control for braking, and trap doors for the cornering. Keep in mind this is a lighter car with 9.5" slicks with some aero effect going on....I would not be surprised if 1.5+ lateral G's are happening on the banking at Pocono.

My real pet peeve is simply the shape of the pan. It's a soup bowl. Not conducive to oil control! A half-round shape like that has no way to keep the oil from climbing the sides while braking and cornering, and to a lesser effect even during acceleration. Even if the baffling keeps it away from the crank, the oil might not be anywhere near the pickup. And even if the engine is not under load, it may very well be spinning 8000 rpms at that given moment, and even 1/2 second of starvation at that rpms will not be kind to the bottom end parts.

SVXRide · #**227** 08-05-2008, 09:26 PM

Quote:

Originally Posted by RallyBob

The baffling is okay, but it needs better anti-slosh control for braking, and trap doors for the cornering. Keep in mind this is a lighter car with 9.5" slicks with some aero effect going on....I would not be surprised if 1.5+ lateral G's are happening on the banking at Pocono.

My real pet peeve is simply the shape of the pan. It's a soup bowl. Not conducive to oil control! A half-round shape like that has no way to keep the oil from climbing the sides while braking and cornering, and to a lesser effect even during acceleration. Even if the baffling keeps it away from the crank, the oil might not be anywhere near the pickup. And even if the engine is not under load, it may very well be spinning 8000 rpms at that given moment, and even 1/2 second of starvation at that rpms will not be kind to the bottom end parts.

So, maybe something more like a typical Moroso pan (straight sides, squared off kickouts)?
-Bill

Dessertrunner · #**228** 08-06-2008, 02:59 AM

Bob what compression will you guys go with?
Tony

RallyBob · #**229** 08-06-2008, 09:26 AM

Quote:

Originally Posted by SVXRide

So, maybe something more like a typical Moroso pan (straight sides, squared off kickouts)?
-Bill

It'll be squared off with some kickouts. None too radical, still need to be able to access the pan bolts as well as the header bolts. And 4 trap doors most likely.

RallyBob · #**230** 08-06-2008, 09:27 AM

Quote:

Originally Posted by Dessertrunner

Bob what compression will you guys go with?
Tony

Jack was talking about 12:1. I think he wants to refrain from having to buy 'straight' racing fuel. A mix might be okay however (93 octane + 100 octane). Budget is always looming!

TomsSVX · #**231** 08-06-2008, 10:10 AM

Quote:

Originally Posted by RallyBob

It'll be squared off with some kickouts. None too radical, still need to be able to access the pan bolts as well as the header bolts. And 4 trap doors most likely.

I was thinking the same thing... Just try and square out the bottom of the pan... Increases volume, decreases any likelyhood of starving the pick-up and will be relatively simple to fabricate...

Tom

RallyBob · #**232** 11-08-2008, 07:44 PM

Small update here.

I completed the oil pan with trap doors for Jack's EG33. Some teasers.

The rest of the pics are here.

The shortblock parts for the new engine are done, Jack is waiting for the custom head gaskets to arrive and then assembly of his new engine will commence. Compression ratio is 11.95:1, the new displacement is a bit over 3.5 litres. More updates when it's finished and dynoed.

dynomatt · #**233** 11-09-2008, 12:17 AM

Bob...talk to me about cooling and inlet.

What are your plans for each?

I notice the oil cooler plumbing...are the sandwich plates effective? Does it provide the right level of cooling? Can the oil pump deal with it?

I'm actually considering going for individual throttle bodies as a mate can make them pretty cheaply...have you looked at that?

Matt

RallyBob · #**234** 11-09-2008, 10:59 AM

Quote:

Originally Posted by dynomatt

Bob...talk to me about cooling and inlet.

What are your plans for each?

I took some time to review the spare block and heads this time around, while the machine shop was working on the shortblock. I mentioned to Jack some of the shortcomings I *thought* I saw in the stock cooling system. So between him and the machinist, some of those areas were addressed (lots of sharp edges and turns) via grinding and machining. I had also suggested a revised externally plumbed cooling system, but that won't happen this time around.

Quote:

I notice the oil cooler plumbing...are the sandwich plates effective? Does it provide the right level of cooling? Can the oil pump deal with it?

Oil temps haven't been an issue. They do climb somewhat when the water temp climbs, but all in all it works well. Lines are -10AN (5/8" - 15.87 mm ID), the billet sandwich plate I think is by Canton Racing, and the cooler is Setrab. The oil pump is interesting, apparently it specs out the same as an STI pump, but with fewer shims under the spring. Not my findings, but rather
Jack and his machinist again.

Quote:

I'm actually considering going for individual throttle bodies as a mate can make them pretty cheaply...have you looked at that?

He thought about the Extrudabody setup from a Porsche 911 (simple adaptation based on my discussions with the owner). But it's not currently in the budget. The other EG33 project I'm *sort of* working on will definitely have the ITB's.

HTH,

TomsSVX · #**235** 11-09-2008, 12:20 PM

Bob, Looks great bud! I was thinking of a dry sump the other day... still lingering... Need to weigh my options

Tom

SVXRide · #**236** 11-10-2008, 11:42 AM

Bob,
Nice! What's the total oil capacity now?
-Bill

XT6Wagon · #**237** 11-10-2008, 02:17 PM

The JDM Dual AVCS engines apparently use the same oil pump as the SVX uses a wider pump rotor than the normal STi's. The 08+ STi is a dual AVCS engine so should have the wider pump rotor too.

SVXRide · #**238** 11-10-2008, 02:25 PM

Quote:

Originally Posted by XT6Wagon

The JDM Dual AVCS engines apparently use the same oil pump as the SVX uses a wider pump rotor than the normal STi's. The 08+ STi is a dual AVCS engine so should have the wider pump rotor too.

Are you saying that you think we should be able to use the oil pump off of an '08 STi??
-Bill