March 18th, 2011
The stock oil pan on the 2rz hung down a little too low- about 2.5″ below the frame rails. I had to raise the front suspension ride height to keep it from scraping during normal driving. This raised my roll centers and decreased my droop travel so something had to be done.
Now, my pan only hangs down 1/2″ below the rails. I chopped off the offending section and expanded the pan sideways to make up the lost oil capacity (much like an upside down mushroom). I was worried about sloshing and the oil pump pickup sucking air, so I designed a trap door system in solidworks. Using 3D cad allowed me to check clearances and design parts that could be made from sheet metal (that could be precision cut with Gatech’s waterjet cutter). The hinges on the trap doors are 1/8″ stainless steel welding rod.
I am really happy with how the pan turned out…a lot of precision fabrication was done to ensure no issues with assembly. All-in-all, the pan modification took about 25 hours of labor.
Steps to modify the pan:
-The oil pan’s dimensions were measured
-Playdoh was used to measure the stock clearance of the oil pump pickup
-The capacity was measured and marked with a kitchen measuring cup and water and a spring loaded center punch
-The windage plate was removed and the pan was cut and sanded straight
-Cardboard mockups of the new pan section were made to determine clearances, install-ability, and looks
-The pan was screwed to a piece of wood to keep it straight and minimize warpage
-The new pan section pieces were waterjet cut out of 1/16″ mild steel plate, and tack welded on (except for the bottom piece)
-The pan and oil pump pickup were installed and the pickup was measured, cut, and tack welded to work with the new pan
-The drain bung was cut from the original pan and added to the new pan section
-The trap doors were designed in Solidworks, cut on the waterjet, and prepped
-Test fit, test fit, test fit. The modified oil pan pickup clearance was once again checked with Playdoh. It was too much, so a 1/8″ spacer plate was cut and welded to the engine side of the pickup.
-A new windage plate was mocked up in cardboard and cut from 1/16″ plate, and welded in
-The bottom plate got the trap door system added, and the seams of the pan were welded up
-The bottom plate was welded on, everything was test fit, and the seams were welded up
-Old form-in-place-gasket (FIPG) material removed and pan prepped for painting
-Gloss black paint on the outside (5 coats?) and some paint on the inside. The inside will be covered in oil so rust is not a huge concern.
The pan still needs to be installed…
March 18th, 2011
I recently went to Phoenix, AZ for an interview. I stopped at the Penske Racing museum and took some neat pictures of their old turbo Indy 500 cars.
March 18th, 2011
I bought a new toy- a Lincoln squarewave 175 tig welder, and love it. It is a very nice welder.
With it, I’ve begun fabrication work on the car again. I completed the headers that I earlier designed in 3D CAD. Recreating the work I did in CAD was a little tricky, but I think I got reasonably close. The pipes were made out of new 16ga J-bends from summit and pieces of the header I fabricated for the 22RE engine. These tubes come with a coating that must be removed prior to welding…I dont think Ill use them again. Next time will be stainless.
I had a learning experience with the welder. I suspected contaminated gas, as I was getting a lot of sparking while welding, and chewing up tungsten. Upon returning the tank to the local welding supplier, my suspicions were confirmed- the tank was a 75% argon, 25% CO2 mix (I didnt think to check). Oh well. New gas, finished the headers.
The collector is a stamped piece from summit racing, with some triangles inside to help merge the flows and extend the negative pressure wave that is reflected back to the cylinders (scavenging effects).
February 17th, 2011
I’ve recently had the pleasure of working with Georiga Tech’s Solar Jackets solar racing team. Our GRM $200x challenge team (Wreck Racing) shares a shop with them, as well as with FSAE, Formula Baja, Ecocar, a robotics team, and a hydraulic hybrid bus. More on the shop if anyone is interested.
Anyways…Solar Jackets is building their solar car and using some cool technology that I thought I would share. The frame is DOM tube, 3d Laser Cut by a company here in Atlanta called Tie Down Engineering. A video of this process is available at their website http://www.tiedown.com/gtech.html
The tubes of their frame are then fixtured by a CNC cut MDF jig. The jig and the tubes in these pictures are 100% held by friction, and the tolerances are amazing.
It looks like they designed the frame (and jig) in CAD with the tubes meeting at nodes, and Tie Down Engineering handled all the cutting. The multitube intersections are beautiful, and the ‘fish mouths’ are quite complex. This process cost about ~$7000 for the frames worth of tubes.
February 9th, 2011
This is a holset semitruck diesel turbocharger (hx65 I think) that will be part of the powertrain of this MG Midget. I’m working on evaluating and redesigning the the chassis to stiffen it up and allow for a v8 to be used.
Note in the green interior how little structure there is. The floor is flat and all the load is carried by the transmission tunnel and the short door sills. We’ve yet to mockup the car in CAD but this will surely be a factor that will need to be addressed.
January 13th, 2011
Here is what I am starting with in 2011. This is the result of the upgrades done in 2010.
January 4th, 2011
So I’m going back to N/A for now for various reasons (my manifold cracked a few times, Im not set up for an intercooler, the 1.6L civic radiator cant handle the extra power) but will be back eventually with a sub 20psi setup (holset maybe?), sidemount intercooler, rear facing intake, etc. Im happy with the 2rz and know its true power lies in boost.
Anyways…I’m going back to N/A so I can have the car reliable and dependable for 2011 so I can continue tuning the suspension.
The header design is a 4 into 1 setup. Its 1.5″ 16ga pipe. 37.1″ equal length primaries (not including the valve seat to exhaust port distance). Im not too concerned about producing maximum power (there are better things for that), but wanted equal length to help the exhaust note and provide homogeneous conditions across the cylinders. That should make tuning to the limit a little safer.
Goal for 2011: Make the car fun to drive.
The headers were designed in Solidworks 2010 using a previous model of the frame.
The book, Scientific Design of Exhaust & Intake Systems was a good read in preparing for the header design. Very theory based and backed by testing, it covers the subject wonderfully. Basically, there is no ‘magic formula’ for calculating header lengths. There is just too much going on. Im hoping my design is a good starting place though.
January 20th, 2010
Added some more pages…and my resume. Going to change hosts soon, should be a blast.
January 16th, 2010
So the old database (which contained all the posts and info on the site) was destroyed. I added a second wordpress setup for Mary (www.mklane.net) and that overwrote my database. I wasn’t sure if it would be a problem so I contacted tech support for my host, startlogic, and asked them. They said it would be fine if I did a few certain steps. Well I did those steps and lost my data. I realized this a month later and spent a few hours talking with tech support only to be told it was my fault for not noticing within 3 days (as far as their backups go) and pretty much treated me like I was an idiot. Startlogic.com’s tech support sucks.
Anyways…Im in the process of rebuilding the site. A bunch of new categories and some other things.