Obnoxious Racing Engines and Racetech Pistons

[Outdrive1]

Here's a couple shots from last night.


Oh and we weighed the block. I was way off. It was 160lbs with the main caps in it. I figured since we were carrying it around by hand it was way lighter. [emoji51]

 

[obnoxious001]

Looking good Barry! Can't wait to see this beast all together! :thumbsup

Paul, text me an address to send your extra piston to... You know how it goes, if you have it you will (Hopefully) never need it!

Yeah, hopefully the boat will have a safe tune and the engine will stay together for a period of time. Years ago when I built engines for GT Performance Gary always got two extra pistons with each set. He sure had a bunch of them stashed above the office.

 

[stokerwhore]

I'm curious as to why one would need to keep the negative block pressure and not just vent it. Was the negative pressure desired for use with blowers? I thought the main advantage of negative pressure was keep the pressure from changing rapidly. not sure it even matters wether pressure is neg. or pos. just that it isn't going through big changes (losing power or blowing oil out of the block) constantly. disclaimer: I'm not offering knowledge here at all, just stating guesses and questions out of curiousity.

 

[Outdrive1]

I'm curious as to why one would need to keep the negative block pressure and not just vent it. Was the negative pressure desired for use with blowers? I thought the main advantage of negative pressure was keep the pressure from changing rapidly. not sure it even matters wether pressure is neg. or pos. just that it isn't going through big changes (losing power or blowing oil out of the block) constantly. disclaimer: I'm not offering knowledge here at all, just stating guesses and questions out of curiousity.

It's just a characteristic of the dry sump. I'm not the most knowledgeable on that subject on how and why it works but I'll give you my idea and maybe someone can elaborate. In a wet sump all your oil is pumped through the motor and falls to the pan. From what I understand the crank is basically turning a mass of oil with it at some point. Dry sump is cleaner and more controlled way to oil everything. In this motor the top end is sealed from the bottom end. There's suction on top and on the bottom so you don't have all that oil falling to pan and on the crank as it's spinning. That's supposed to create horse power, less oil being slung around.

 

[wsuwrhr]

It's just a characteristic of the dry sump. I'm not the most knowledgeable on that subject on how and why it works but I'll give you my idea and maybe someone can elaborate. In a wet sump all your oil is pumped through the motor and falls to the pan. From what I understand the crank is basically turning a mass of oil with it at some point. Dry sump is cleaner and more controlled way to oil everything. In this motor the top end is sealed from the bottom end. There's suction on top and on the bottom so you don't have all that oil falling to pan and on the crank as it's spinning. That's supposed to create horse power, less oil being slung around.

That about does it.

 

[LargeOrangeFont]

I'm curious as to why one would need to keep the negative block pressure and not just vent it. Was the negative pressure desired for use with blowers? I thought the main advantage of negative pressure was keep the pressure from changing rapidly. not sure it even matters wether pressure is neg. or pos. just that it isn't going through big changes (losing power or blowing oil out of the block) constantly. disclaimer: I'm not offering knowledge here at all, just stating guesses and questions out of curiousity.

Try sucking through a straw with a hole in it above your drink. That is why a dry sump motor needs to be sealed. That is an extremely simplified way to look at it.

 

[stokerwhore]

that's called windage and I believe we're talking about two different subjects although you are correct (to my knowledge) in what you say about the benefit of dry sump. My thought was maybe the negative pressure was to go with a blown application were you almost always have some blowby and there for positive pressure. just curious.

 

[stokerwhore]

Try sucking through a straw with a hole in it above your drink. That is why a dry sump motor needs to be sealed. That is an extremely simplified way to look at it.

makes sense

 

[obnoxious001]

OK,, took a couple more days than I had hoped for, but the block is back in my hands and should have proper main bearing clearance now. I need to mock it up with bearings and measure to satisfy myself that it's correct, cut the piston rings, then get to work putting it together.

 

[Enen]

You guy's are slacking on the updates... C'mon now.

 

[obnoxious001]

You guy's are slacking on the updates... C'mon now.

The photographer has not been over here. I have sent him a number of photos and he has not posted.

 

[Outdrive1]

Lol. Barry is past a short a block. I've just been swamped and trying to do the family and vacation stuff at that same time. Thank God the 4th is over. Maybe everything can get back to normal. Let me post some pics. [emoji106]

 

[Outdrive1]

Got the block back from machining a second time. Barry triple checks clearances and then the block is ready to be scrubbed. It's already been through a machine to clean it, but he hand washes it a couple more times when he's ready for assembly just make sure.

 

[wsuwrhr]

The photographer has not been over here. I have sent him a number of photos and he has not posted.

Photographer. Noted.

 

[Outdrive1]

Clean block ready for assembly.

 

[Outdrive1]

Shameless Photo op for Bildo.

 

[Outdrive1]

Checking fit for end play on the crank. A lot of the tools are magnetic and need fixtures made since you can't just stick anything to the block.

 

[Outdrive1]

Here he's cutting the ring gap. Numbering all the rings so he knows which cylinder they go in. Everything is laid out and ready for assembly in their perspective positions. Thanks again RaceTec for the quick turn around. [emoji106]

 

[Outdrive1]

Pistons in. Here's another fixture to degree the cam. It's 1" taller than a standard deck. Barry had to mock something up to fit down the lifter bore as well as bolt plates on the top of the deck to make his tools work.

 

[Outdrive1]

Checking valve springs. Dart Big Chief Heads should be ready to bolt on.

 

[wsuwrhr]

Checking fit for end play on the crank. A lot of the tools are magnetic and need fixtures made since you can't just stick anything to the block.

You don't have an alum magnet?

 

[wsuwrhr]

Looking at the crank area of the block I keep having to tell my brain it isn't a Mopar.

Brian

 

[Outdrive1]

Looking at the crank area of the block I keep having to tell my brain it isn't a Mopar.

Brian

Oldsmobile! Lol. Why it's called an Olds I have no clue. Maybe someone can elaborate. Pontiac heads, Chevy internals. It does use a Mopar pan gasket. It's pretty much got a little of everything except Ford thank God.

 

[Outdrive1]

Making one change in the plumbing. The dry sump has an Oberg filter already. Adding the big style filter to the system. There isn't really a higher flow filter system then the big HP6 style filters. [emoji106]

 

[wsuwrhr]

Making one change in the plumbing. The dry sump has an Oberg filter already. Adding the big style filter to the system. There isn't really a higher flow filter system then the big HP6 style filters. [emoji106]

What is happening to the Oberg filter?

 

[Outdrive1]

What is happening to the Oberg filter?

The oberg is before the dry sump tank on the return and has a 16an line in and out. The other filter is after the dry sump tank before it enters the block. Dash 12. Just want to be covered both ways.

 

[boatnam2]

sweet motor!

 

[wsuwrhr]

The oberg is before the dry sump tank on the return and has a 16an line in and out. The other filter is after the dry sump tank before it enters the block. Dash 12. Just want to be covered both ways.

Oh ok. so not taking it out, just adding a second filter. Got it.

 

[obnoxious001]

Looking at the crank area of the block I keep having to tell my brain it isn't a Mopar.

Brian

It's a KB block, and it does take a Mopar pan gasket.

I believe the "Oldsmobile" part comes from pro stock racing, when they started using the symetrical port Pontiac and Olds heads, and then of course Dart and Brodix made their versions. This one has 18 degree Dart "Big Chief" heads.

The new oil filter is to replace one that was designed for a hydraulic fluid filter, and we kept scratching our heads and figured the newer HP 6 style large capacity filter would be a safer choice, after seeing what the water in the oil did to the filter media in the old filter.

 

[milkmoney]

Looks bitchin. Can't wait to see and hear it run [emoji106] [emoji106] [emoji202]

 

[mjc]

Those started as GM DRCE engines I think. Drag race competition engine

 

[Outdrive1]

Looks bitchin. Can't wait to see and hear it run [emoji106] [emoji106] [emoji202]

Exhaust is dry. You can hear it for sure.

 

[Outdrive1]

Dart Big Chief 18 degree heads. Jessel shaft rockers. Solid roller cam. Time for some valve adjustment. Barry is going to give me some lessons on adjusting them and then we will have a long block. That's about an 11 thousand dollar set of heads not including all the hardware.

 

[spectra3279]

Damn purdy

 

[wsuwrhr]

Dart Big Chief 18 degree heads. Jessel shaft rockers. Solid roller cam. Time for some valve adjustment. Barry is going to give me some lessons on adjusting them and then we will have a long block. That's about an 11 thousand dollar set of heads not including all the hardware.

Jesel and T&D have always been my favorites.

 

[Outdrive1]

Big chunk of aluminum.

 

[28skater]

Big chunk of aluminum. View attachment 573167

I thought you are required to micro-polish all aluminum in a Schiada trailer queen

 

[Outdrive1]

I thought you are required to micro-polish all aluminum in a Schiada trailer queen

I thought about it. It was either all polished or all raw. For some reason I liked the look how it was. It's all business. Also I just didn't want to ship everything and risk the time or anything getting damaged. That block and heads are too much money to let them out of my control if that made sense. I would have had a heart attack if something was damaged in shipping.

 

[RaceTec]

You guys are correct with the Pontiac and Oldsmobile connection on these parts. They all started as pro-stock drag parts with different GM based sponsors. Larry Morgan, Warren Johnson, etc...
Everything is looking great, I actually like the raw finish too, more business than show!

 

[stokerwhore]

that thing is looking sexy already. I've always like the sound of those gear driven cams too :thumbsup

 

[Outdrive1]

You guys are correct with the Pontiac and Oldsmobile connection on these parts. They all started as pro-stock drag parts with different GM based sponsors. Larry Morgan, Warren Johnson, etc...
Everything is looking great, I actually like the raw finish too, more business than show!

The pistons are polished. [emoji106] lol

 

[obnoxious001]

That block and heads are too much money to let them out of my control if that made sense. I would have had a heart attack if something was damaged in shipping.

And yet you have left them with me.... hmmm!

 

[Outdrive1]

And yet you have left them with me.... hmmm!

I do trust some people. [emoji6]

 

[obnoxious001]

Paul seems to have passed his Jesel shaft rocker valve adjusting class this evening.

We need some Big Chief valve cover gaskets, and to get the intake and oil pan bolted on, and it will be ready for accessories. I don't know what other photos may not have been posted yet, but it should be heading over to get dropped back in the boat in the next couple of days.

 

[28Eliminator]

Not putting it on a Dyno?

 

[Outdrive1]

Not putting it on a Dyno?

We were talking about it. I only changed the compression and not by a bunch. If I need to we can put an air/fuel meter in the exhaust.

 

[RaceTec]

The pistons are polished. [emoji106] lol

They look polished but that is just good surface finish! :thumbsup

I didn't ship your spares because I am hoping to head out to Parker next weekend and meet up with either you or Barry at some point... :skull

 

[renodaytona]

Good speed and feed rate = awesome surface finishes. :cool

Awesome build, can't wait to see pics and video of it back in the boat running. :thumbsup

 

[Uncle Dave]

Pretty awesome outdrive1 looks like an absolute ball.

Barry's been building great mills for a long time and Racetech is the stuff.

Super cool man I wanna ride someday.

UD

 

[Outdrive1]

Ready for installation. [emoji106]