Project Analysis Paralysis

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saabman
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Re: Project Analysis Paralysis

Postby saabman » Wed Aug 14, 2013 6:52 am

So you need a baffle in the pan so that the oil can always drain. Or as I remember Dave M. Viper used pumps to return the oil from his low mounted turbos on the Viper. Richard, if it wasnt for bad luck you would have no luck on this project.
Chris

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MaineLotus
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Re: Project Analysis Paralysis

Postby MaineLotus » Wed Aug 14, 2013 10:25 am

Mocal sells an oil cooler pump that many people use, around $150 on ebay. I'm sure you've already tried this - can you reposition the center housing?

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Rocwandrer
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Re: Project Analysis Paralysis

Postby Rocwandrer » Wed Aug 14, 2013 11:39 am

MaineLotus wrote:Mocal sells an oil cooler pump that many people use, around $150 on ebay. I'm sure you've already tried this - can you reposition the center housing?



The axle blocks the moroso oil return bung, not the center housing discharge, if that makes sense. I'm considering:

Making a 2 part hard line joined with hose in the middle (since it is flanged on one end and threaded on the other, there is no room to tighten the threaded fitting with a one piece hard line). I'd either run over the axle with the idea that this reduces feedback from oil moving in the pan, or with the idea that it is a smoother flow path.

Extending the hose barb on the pan to nearly touch the axle, but rigidly locate the line at that critical clearance point (the axle is setup for anti-torque steer, and the clearance is to the fixed section on the long side). This is sort of the same as the above.

Discharging the oil into a mini holding tank over the axle, and then discharging that down to the pan. This would effectively stop the oil in the pan from sloshing up into the discharge line, and if I vented to mini holding tank up into the PCV, I could effectively increase the pressure head driving the oil back to the pan without increasing the pressure in the CHRA bearing discharge. But it is the most complicated....

No time for a pump, and I'm pretty far over budget already....

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MaineLotus
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Re: Project Analysis Paralysis

Postby MaineLotus » Wed Aug 14, 2013 8:57 pm

Weld a new bung? Not a large project in my car, but maybe it's not feasible on the MR2

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Rocwandrer
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Re: Project Analysis Paralysis

Postby Rocwandrer » Thu Aug 15, 2013 1:27 am

MaineLotus wrote:Weld a new bung? Not a large project in my car, but maybe it's not feasible on the MR2

Where? Can't go higher in the pan by enough to be worth it, can't go lower without making it worse...

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Re: Project Analysis Paralysis

Postby Rocwandrer » Fri Aug 16, 2013 12:28 am

Oil line run, including aluminum heat shield which I made from 1.125x0.058 aluminum tubing, bent to the right curvature, notched, and clamped on. ~1/16" between heat shield and axle, about 10 lb of force required to make them touch.

Coolant lines insulated and safety wired.

Finished insulating intercooler and metal intake parts near turbo.

Ran intercooler water lines

Nate made a bracket and mounted my intercooler pump for me (thanks, Nate!)

Made mounts and installed front mounted intercooler heat exchanger with ~1500 cfm fan.

Installed fittings and connected lines.

Increased flow capacity of cold side pcv

Started making intake heat shields, but it was too cold and the side vent wouldn't come out.

Still need to:


Wire fan and water pump

Secure hose runs

Hook up new MAP sensor and verify operation.

Secure loose items.

Wire water temp probe to ait sensor lead so autotune will work in boost.

Block side vent, port air to filter, and block off flow from exhaust area.

Take out some timing retard and some fuel. If this doesn't cure misfires, new plugs with smaller gap. If that doesn't cure it, wire wastegate and run na. :(

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Rocwandrer
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Re: Project Analysis Paralysis

Postby Rocwandrer » Sat Aug 17, 2013 12:25 am

Just got to hotel... lightning and super thick fog and repaved roads without painted lines = 20 mph in 55 zone...

Water leak in intercooler system and too much retard with a poor understanding of the knock signal mean it is down on power, but otherwise, I think I'm set for Saturday.

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Re: Project Analysis Paralysis

Postby Rocwandrer » Thu Aug 22, 2013 12:21 am

This build is sort of like a practical joke someone is playing on me. On the way home from Loring, the headlights got very dim whenever I went above 0 psig. I have this one partly figured out, but it just became low priority to fix...

Data logs show that the boost controller failed sometime during the day Saturday, and I was getting peak boost on course of about 5.4 psi. Which is a good thing. On the drive to work this morning the clutch called it quits.

I was messing around, trying to decide if conservative driving would let me use the car to go to my specialist appointment in Portland Thursday, and determined that I can get 1.5 psi of boost at 1500 rpm. Promising....

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MR Chuck
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Re: Project Analysis Paralysis

Postby MR Chuck » Thu Aug 22, 2013 5:07 am

It looked good out there. I hopes it gets sorted out soon.
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Re: Project Analysis Paralysis

Postby Rocwandrer » Thu Aug 22, 2013 5:31 pm

I've got to call the guy with the transmission tonight (he doesn't want to use paypal :? ) I'm seriously considering going to an 11% taller 5th gear ratio while it is apart. Right now 75 mph is 3600 rpm. Loud, bad for fuel economy, bad for engine longevity, and totally pointless with twice the torque on tap. It adds around $450 to the build cost though, for no performance benefit at all (higher top speed I guess is performance, but who cares about that...?)

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Re: Project Analysis Paralysis

Postby Rocwandrer » Thu Aug 22, 2013 5:37 pm

Borrowed car died at the hospital this morning. Nursed it to NAPA, borrowed code reader, diagnosed problem, bought part, did repair with tools from my pocket (the really commonly needed stuff like 10 mm box wrench rides around full time in my pocket now). Drove home. Really no drama, considering it was running on 3 cyl when I pulled into NAPA, and I've never worked on any part of a Subaru before that required more than a sledgehammer and body jacks (yeah, I hang out with Andrew too much :D ).

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Re: Project Analysis Paralysis

Postby Rocwandrer » Thu Aug 22, 2013 9:03 pm

Second or third best run of the weekend for me. A few distractions leading to poor line choice execution, but my foot worked better than all day Saturday on this and the following (SD card full) run, and the car control looks better in the video than I remember it in person

http://youtu.be/NODEOYok5Gg

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saabman
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Re: Project Analysis Paralysis

Postby saabman » Thu Aug 22, 2013 9:18 pm

SWOOSH... I thought you had a loud exhaust. The only video where I can really make out distinctive engine sounds are Christians in the Miata.

Curious to know what you did on the slalom leading to the parallel 6 packs. Mike P. was promoting a slow down after the first six pack to get a better attack angle on the second. My drive line was hot deep in between with just enough braking to make it past the green cone on the second six pack. Hard to tell from the video what you did.
Chris

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Re: Project Analysis Paralysis

Postby eg8tuner » Thu Aug 22, 2013 10:05 pm

Rocwandrer wrote:Borrowed car died at the hospital this morning. Nursed it to NAPA, borrowed code reader, diagnosed problem, bought part, did repair with tools from my pocket (the really commonly needed stuff like 10 mm box wrench rides around full time in my pocket now). Drove home. Really no drama, considering it was running on 3 cyl when I pulled into NAPA, and I've never worked on any part of a Subaru before that required more than a sledgehammer and body jacks (yeah, I hang out with Andrew too much :D ).


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Rocwandrer
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Re: Project Analysis Paralysis

Postby Rocwandrer » Thu Aug 22, 2013 10:28 pm

saabman wrote:SWOOSH... I thought you had a loud exhaust. The only video where I can really make out distinctive engine sounds are Christians in the Miata.

Curious to know what you did on the slalom leading to the parallel 6 packs. Mike P. was promoting a slow down after the first six pack to get a better attack angle on the second. My drive line was hot deep in between with just enough braking to make it past the green cone on the second six pack. Hard to tell from the video what you did.


Autumn can legitimately hear me coming from 4 blocks over, but in the context of a race car, it is only really loud on the inside. Previous videos taken with that camera were a lot better about wind noise. I think the filter might have come loose.

Through the slalom across the transition I was trying for on the limit, obviously.

A quick and very subtle stab of the brake coming off the last slalom cone. I was coming at it from the bottom and with other issues in the mix I never found out if I could really take the whole thing WOT. It was at the very least tantalizingly close in the spyder on street tires. With the brake stab, I had to throttle modulate for a moment after, but it really was close to just being a WOT nut check (would have been with stickies).

So, throttle modulation until I could be sure I'd make the track out on the second six-pack (about 10 ft total right at the beginning and then back to WOT, because my car corner better under WOT, at least until i get an LSD and turn the boost up).

WOT to braking into the second slalom cone in the next slalom.

Throttle modulate 2 cones.

WOT to braking for the right side setup for the left-hander into the "D".

That course had half a dozen places where if you were slightly behind or didn't use the setup space, it cost you for mutiple following elements. I had not a single run where I didn't blow more than one of those places. The worst one in the video I just posted was right after the start.


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