trwebb26
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Everything posted by trwebb26
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Been a while since my last update. Finished the bathroom, cleaned up the house for my wife's baby shower, stayed as far away as possible from the baby shower (last Saturday), got sick on Sunday, missed some work during the week for being sick, and finally got a chance to work on the Z yesterday for a while. Tail lights are assembled and installed (I forgot to take a picture), and I finished my downpipe. Holy crap do I have a lot of time into this thing: Really happy with how it turned out. The wastegate exits into the straight section of the main pipe to try and prevent any extra backpressure. I was 3/4 of the way with the last weld to complete my exhaust and ran out of shielding gas. I've pretty much just got intercooler piping left along with some other odds and ends so I expect I'll be able to keep myself busy tomorrow (install clutch slave and bleed it, do some wiring, start mocking up some of the intercooler bends, and maybe some other stuff).
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Monzter - good work, man. I love seeing your craftsmanship. I own 2 books on manifold design and I was wondering if you know for sure if intake pulse reversion matters for boosted applications? I'm having trouble thinking through the dynamics in a boosted application. It doesn't look like the runner inlet to the manifold is ideal based on what the books say - but everything I've read is for N/A applications. How did you set up the CFD... Is it forced in from the inlet and you let the 6 runners determine flow rates or do you assume equal flow rates at the runners and suck the air into the manifold? Do you expect the dynamic nature of air in a manifold to have a big impact on flow in the manifold? When the valve is closed there will be a wall of air blocking flow to that port creating inconsistencies. Sorry for the rambling.
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The list isn't the most influential cars ever... If it is - then the stanley steamer ought to be on the list. It is the COOLEST car ever and I don't think that car was iconicly cool like the rest of the list.
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Thank god they didn't miss the Lincoln. As for the Audi... I've seen foxbody mustangs do similar things and they don't deserve to be on the list. I dunno... That car just sticks out like a sore thumb to me on that list. Call me crazy - but I don't think the 2009 GTR has any business on the list either.
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Very solid list. My only problems are... How did this make the list? And the 1966 Lincoln Continental convertable with suicide doors not make the list:
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LOL at Phil...
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I'm not sure why - but this makes me laugh so hard... I can be having a horrible day and watch this and I will laugh: I'm curious what other internet video nuggets I haven't seen.
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Decatur, IL resident.
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I like it too. The only thing you should reconsider is to mount your shoulder harness attachment lower. They are supposed to be some number of degrees below your shoulders - not above. John Coffey would spit this number out like he was blinking or breathing. A search on the scroth (SP?) website will find the reference that John always points to for proper harness placement.
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Lots done on the Z this weekend: Fuel lines up to the fuel pressure regulator - do you think the fuel lines sticking out from under the car give anything away? Bracket bent back in an "L" and everything painted up nice and bolted in tight: I ran the fuel lines next to the diff and driveshaft. They used to run under the rear swaybar, but I like this routing much better. If you want to work on the rear of the car the rear swaybar comes out first and fuel lines in the way are a drag. A good pic of the rear brake line clamped to the frame rail and the bulkhead fittings for the fuel. I think I'll be moving my fuel filter that goes before the fuel rail down to this bulkhead: And up to the fuel pressure regulator: You may remember I dropped my tail lights and ruined them a month or so ago. I got new ones and decided to paint the bezels. Notice the box in the background I used to paint them on... yeah - its a baby stroller box. Thanks Mom and Dad! Put in over a roll of Raamat sound deadening. Really time consuming but I think it will be worth the weight (get it... wait.. weight... - sorry - corny I know). Roll bar is tightened down, seats are bolted in, and harnesses are bolted in and adjusted. HOLY CRAP I need new door skins! Maybe I'll bring back white vinyl and fake wood strips? My carpet is in very sad shape. What does it cost to have some custom upholstry done? I'm not a fabric and carpet kind of guy. The 8' long x 20" deep with 2 built in sinks (cultured marble) bathroom countertop came in today. I somehow managed to wrestle that heavy bastard (over 200 lbs) up some stairs and in place in the bathroom without hurting myself. I only scratched up the wall in one place. I'll be working the next 2 days on completing the bathroom at which time I'll be free from home repair jail and back on the Z. I'm ordering parts tonight and I'll be reassembling the tail lights and starting on intercooler piping this week. Feedback always appreciated. Thanks and stay tuned.
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Look at the turbo I just won!!!
trwebb26 replied to RB26powered74zcar's topic in Turbo / Supercharger
Varible Geometry Turbo... You can change the pitch of the blades during operation to get the best of all worlds... Good response with lots of top end power. The problem will be controlling it. VGTs come on the new dodge cummins diesel trucks nowadays - I've never seen Garrett with one. -
Where my wastegate ended up: I'm thinking I really should put in a flex joint between the wastegate and the downpipe so thermal expansion/contraction doesn't destroy something... The shortest I can find is 4" long. Anybody think I'll be ok without one? This weekend lots of cleanup... Order some parts, plumb up the fuel, start on the intercooler piping, and work on the interior.
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Where/how to buy engineering modeling software
trwebb26 replied to trwebb26's topic in Non Tech Board
I want to start designing parts and *cough* systems *cough* to sell (business plan and LLC are in the plans) I need something I can generate prints with. I also want the ability to do pretty complex FEA including structural, modal, and CFD as well as some more basic mechanism analyses. My experience with student editions is that they say they are "full featured"... and they are for the most part. The student edition of Pro/E I used to have had a pretty serious limitation on the number of elements that it would allow you to mesh and run in Mechanica. I'm probably better off just buying something. -
I'm very familiar with Pro/Engineer (I use it at work), but I'd settle for learning Solidworks. Anybody know how to buy the software or a lisence so I can use it on my home computer? I'm totally expecting sticker shock BTW...
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I spent tonight messing around with different wastegate placements using some 1.5" PVC pipe (matches the shape of the metal schedule 40 bends). I've decided to hang the wastegate upside down (cap facing down). The run from the manifold is short, the serviceability is good (I can change the spring easily from under the car), the plumbing into the downpipe will be very easy and clean, and the cap of the wastegate will get some fresh air from under the car to keep it cool. I'll be cutting the pieces out of metal tomorrow and welding it up... and hopefully get it piped into the downpipe. Anybody ever seen somebody mount a wastegate upside down? I can't think of a problem with doing it that way?
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Tonight I tacked and welded the downpipe - here are the pics... So now I'm trying to figure out where to put my wastegate... I've got three options: #1) In the typical location - near the firewall: #2) Near the frame on the left side: #3) Under the turbine housing: I'm kind of leaning toward #2 or #3 right now... #2 has better servicability, but #3 has a shorter run from the manifold to the wastegate and the plumbing into the downpipe will likely be a little cleaner. I'd love to hear some opinions on where you think I should put it. Thanks and I appreciate the feedback.
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Saturday: Plumbed all of the fuel lines up to the engine - including the fuel pressure regulator. Sunday: - Tore apart all of the fuel line routings to paint and undercoat all of the places I did welding on and did all of the painting. - I plugged up the looped coolant line with some 1/2" brass pipe plugs. - I made a serious amount of progress on my downpipe. The majority of the time was spent fabbing up a 4" dia to 3" dia taper that is 4" long. They don't sell one that short (that I could find) - so I made one... tedious work. For the downpipe - there are so many bends that come together all in one place to make a nice smooth path for the air to get out that I keep second guessing it before I tack anything. I got frusterated so I'll get back at it this week with a more clear head. Plans this week: - Final Assembly on the Fuel up to the rail - Finish the downpipe - Figure out the wastegate placement and weld it all up including plumbing it into the downpipe - With the exhaust all done - take the manifold, turbine housing, and exhaust to get ceramic coated... I might wait until all of the intercooler plumbing is done first so I don't have to take multiple trips to the coaters. - If I have time - work on intercooler plumbing and putting sound deadening inside the car.
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After 4 solid weeks of work on the house (at least 2-3 hours per day - every day) - the baby room is DONE and the bathroom will be done this Friday (minus the custom countertop that should be here next week). Pretty much everything I touched turned out to be a massive pain in the ass due to the incompetence of former home owners and their lack of remodeling skills. I FINALLY get to work on the Z this weekend. Stay tuned.
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so basically you want to build a dyno - without the dyno... Won't be a problem. Only thing I can see is that it will rev up pretty fast without the extra rotating mass.