The Turbo Super Duty Build. (Page 47/63)
FastIndyFiero JUN 11, 08:59 AM
I started on my proto-throttle...
FastIndyFiero JUN 19, 10:24 AM
Alan sent me his DOHC parts for comparison and reference. His head is set up to use a double timing chain, while mine is only a single. From what I can tell from the Cosworth doc, however, the cams are the same. So I'm going to be doing some fine measuring and get all the journal and critical dimensions from the cams. He also sent me his Cosworth pistons. Pretty impressive for 1980's pieces...They only weigh 20g more than my dished CP pistons, with a full dome. I'd like to use these for reference and have CP make a stronger version in an X-forging, so I'd have the better ring land features that the CP's boast. I'm not sure how this would compare to just sending in a mold of the combustion chamber.
FastIndyFiero JUN 21, 03:44 PM
Here's what happens when I use a CNC machine by myself.


Here's what happens when someone helps me along by changing my offsets without telling me:


After closer examination...It looks like the offsets were not changed (I don't have to kill anyone now, yay). When I started cutting, the part flexed enough for the pressure to be relieved off the vise jaws and the part to slip, it rode up to the top of the cutter faster than I could push the stop button. I am fairly suprised this happened, as there was still quite alot of material keeping the top section of the part stiff. Maybe I didn't tighten down the vise enough...who knows. In any case, the prototype barrel throttle is indeed finished . I'll probably make one more to try out some ideas, then I want to start on the 'production' throttles.

[This message has been edited by FastIndyFiero (edited 06-21-2008).]

FastIndyFiero JUL 17, 09:45 PM
While work starts on prototype throttle #2 housing, branches to different parts on proto-throttle #1:







Hopefully I can get in on the CNC this weekend.

And, almost done with the house.
americasfuture2k JUL 17, 11:28 PM
oh wow, im jealous. that you have a cnc machine.

------------------
1987 Fiero GT built by my brother, merlot566jka, 3500 LX9 from 06 Malibu, WOT-TECH.com 1280 grind stage 3 cam, LS6 valve springs, 1227730 ECM conversion, Darrel Morse solid aluminum cradle mounts, Truleo headers modified to fit the 3500, 36# inectors, 70mm 4.3 throttle body adapted to 3500 intake, ported heads, upper and lower intakes, lightly polished, tcemotorsports.com crank trigger wheel, CenterForce dual friction clutch, Flowtech Afterburner muffler, 2.5" piping, cat deleted, EGR deleted, SinisterPerformance tuning, C6 Corvette exhaust tips. projected to be 35 MPG with a guesstimate of 250 hp to the wheels

FastIndyFiero JUL 22, 02:41 PM
Throttle body housing #2:

Reaming the holes for the alignment pins...

The (somewhat) finished product:


Notably absent from housing #1 are the difficult-to-install thread inserts, which I figured were nice, but not REALLY necessary. I also received the aluminum for the barrel valve portion, and I hope to cut the CORRECT ports into housing #2 this week. I've also made a decision:

The SD4 will complete its first iteration in pushrod form. I have almost all the parts I need except for the header to do this. It would be silly for me not to. In the meantime, I will try completing the parts collection/replication for the DOHC head.

Goodnight and goodluck,
Nate
FastIndyFiero AUG 01, 11:42 PM
Throttle housing almost done, I'm going to try to get the o-ring lands cut on Monday or Tuesday.
This images is larger than 153600 bytes. Click to view.

This images is larger than 153600 bytes. Click to view.

I can see this thing flowing pretty good:
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This images is larger than 153600 bytes. Click to view.
Fit is exceptional, at most 5-10 thousandths off in places. Luckily for me all the ports are very consistent. I haven't done any calculations for runner length using this throttle setup, so I'm still not sure where these things are going to sit.

I still haven't gotten to do the end caps, haven't been able to scrounge the material...Soon though.
FastIndyFiero SEP 08, 10:33 PM
Spent some of my day off designing a rocker girdle:



[This message has been edited by FastIndyFiero (edited 09-08-2008).]

FastIndyFiero SEP 11, 08:14 PM
Been looking into a new rendering package, here's a couple of screenshots. I wish I could save the full rendering outputs, but oh well.





[This message has been edited by FastIndyFiero (edited 09-11-2008).]

FieroWannaBe SEP 11, 08:22 PM
What package is that, those are extremely nice renders.