Another do it yourself turbo project

[lakercr]

Did a little more work on the rear end last night. Finished fitting the exhaust Y pipe, installed the O2 sensor, amd pretty much finished the rear-end plumbing. The oil return line is a steel elbow off the bottom of the core - it was too long, and pointing in the wrong dirrection. Spent some time cutting, bending and re-welding it together. The oil return is gravity fed, so this piece needs to have a gradual downhill slope to it. I wanted to exit the exhaust out the stock openings similar to how Bender's is done, but I didn't like the idea of one pipe being a "dummy", so I worked out what I hope is a solution while I was building the diffuser. If I'd had enought of the proper clamps, the entire rear end would have been done last night. As it is, I need to spend another couple hours on the last bit of plumbing and the tunnel protector/charge tube, then the turbo is completeup to the Delta box. Fuel system and intercooler are next.

 

[snowbeast]

Hi lakercr,i think you got that post done pat,lol what 5 times he he must of hit something wrong,yea i will be checking to see how you make out w/the pcv valve,cause this thing uses way to much oil,other than no smell,one would think it was a 2-stroke, wow is all i can say to you guys building your own turbos,way cool,thumbs up to this group for sure,see ya later lakeer keep us posted,oh ya just once is enough lol. Pete :lol:

 

[snowbeast]

Hi lakercr,i think you got that post done pat,lol what 5 times he he must of hit something wrong,yea i will be checking to see how you make out w/the pcv valve,cause this thing uses way to much oil,other than no smell,one would think it was a 2-stroke, wow is all i can say to you guys building your own turbos,way cool,thumbs up to this group for sure,see ya later lakeer keep us posted,oh ya just once is enough lol. Pete :lol:

 

[snowbeast]

whats going on Mr.Sled everytime someone posts it like doubles or worse tripples lol

 

[snowbeast]

What is debug mode for,on a forum? Ha something looks like may be sick people playing cheap thrills again,does anyone see a worm,out there.

 

[lakercr]

Few more pics... not sure what is going on with the multiple posts.

 

[lakercr]

this is the error I'm getting when I try to attach pics.

SQL Error : 1016 Can't open file: 'phpbb_search_wordmatch.MYD'. (errno: 145)

INSERT INTO phpbb_search_wordmatch (post_id, word_id, title_match) SELECT 10810, word_id, 0 FROM phpbb_search_wordlist WHERE word_text IN ('few', 'pics', 'sure', 'multiple', 'posts')

Line : 242
File : /home/sites/www.rx1.info/web/includes/functions_search.php

 

[lakercr]

trying again...

 

[lakercr]

pics..

 

[True Blue]

Lakercr,

Email me the picture and i'll post them for you.

TB

 

[lakercr]

One more time...

 

[lakercr]

Thanks TB - looks like it's working now...

 

[lakercr]

Well, fired this pig up last night to give the exhaust a listening to. Doesn't sound much louder than stock when idling, but has a nice raspy sound to it when you blip the throttle. Also discovered that I'm putting a little too much oil to the seals in the turbo - steady drip coming out of the compressor. A brand new turbo can leak past the seals at ~60psi. For most turbos 5 psi (min) idle and 25 psi (min) WFO are acceptable. RX is making somewhere around 70 psi at WFO. Tonight the oil supply line goes on a diet.

Just for fun, I hooked up the Autometer guage to my O2 sensor while I was testing the exhaust. At idle it is full rich for about 1 minute, which makes sense as this a single wire sensor (not heated). Once the pipe has a little heat in it, the reading stays just into the "rich" side of the dial. Pin the throttle and the reading moves about 3 LED's back towards "Stoich". Kinda cool. Autometer wanted $140.00 CDN for the O2 install kit (everything except the guage). I bought an O2 weld flange at the local go-fast shop, and a Bosch sensor for $30.00. Wanted to use a wide-band sensor, but Autometer advises that the guage I have isn't compatable.

 

[lakercr]

I've been experimenting with a couple of different ways to bring down the oil pressure that the turbo is seeing, and it is finally dialed in. Ended up going with a .045 restrictor in the supply line which is giving me about 20 lbs idle on a hot motor, and about 40lbs at rpm. The oil return is working really well. I "t-ed" into the steel 90 at the bottom of the sump, and connected my oil return to it with clear line to see what was going on with the sled running. I wanted to make sure that there wasn't too much suction in the line, which might dry out my bearings... As it turns out, the line has a nice steady vacuum to it - it will even pull oil up the line if the front of the sled is raised. I'm happy now with all of the testing I've done for oil and cooling to the turbo, so the rear end has been buttoned up. The charge tube under the tunnel is connected to the compressor, and the plumbing under the hood is complete to the intercooler. Tonight will be spent on fabricating the intake, and hopefully installing the pump and regulator (supposed to be arriving today). We have about six inches of snow on the ground now, so going to try and get the sled running for Sat. night, and be out testing on Sunday.

 

[Snow Fever]

Lakercr, Looks good. What did you end up using for the gasket material and what did you use for the restricter? You say you got 6" of snow (Lucky bugger) My buddy and I are going on a road trip Sunday to see if we can find some. Its been really sunny with temps between -2 during the day and -17c at nite and its dry as a popcorn fart around here. If we find any snow and I get to do any testing I'll give you a call Monday and see how you made out as well.