 
     |
| The Turbo Super Duty Build. (Page 46/63) |
|
The_Stickman2
|
APR 25, 03:28 PM
|
|
|
|
|
Toddster
|
APR 25, 05:41 PM
|
|
| quote | Originally posted by Dave Deerson:
Looking for Todd(Toddster) or Tom(Tomcat),I just was looking for some info from Tom and to see if Todd had a Torsen LSD in with the parts he bought from Jack Ondrak?Guys,are you out there?Sorry,but I just feel snubbed due to a topic drift.I own a real IMSA GTU Fiero and just like to collect info on some of the other tube chassis cars left out there.
Sorry for the rant,
Dave D. |
|
Sorry to be away from the thread for so long but work is hectic latley. Anyway, I sold all of the spare LSD's I had. Fierobear bought one and I don't think he needs it. You might try to email him.
|
|
|
|
Dennis LaGrua
|
APR 25, 07:24 PM
|
|
With a turbo you are putting in somewhat of an inline exhaust restriction. IMO this may need to be taken into accord when designing the headers. Too much flow slows down the exhaust flow killing the boost at the bottom end while too little flow restricts the boost at the top end. With a turbo you want a fast moving exhaust flow. This is best done with Ceramic Coated exhaust tubing that keeps the heat in and tubing that's not overly large which keeps the flow moving quickly. On the exhaust side of the turbo you can go as big as you like without any ill effects.
------------------
87GT - with 3800SC Series III engine, 4T65eHD
87GT - 3.4L Turbocharged engine, modified TH125H
" I'M ON THE LOOSE WITHOUT THE JUICE "[This message has been edited by Dennis LaGrua (edited 04-25-2008).]
|
|
|
|
RWDPLZ
|
APR 25, 08:52 PM
|
|
|
|
|
FastIndyFiero
|
MAY 07, 07:48 PM
|
|
I ordered material for Cosworth intake #1. I've also been thinking about reviving my barrel throttle idea. It's been occupying most of my thoughts for the last month, I think I've had some good ideas concerning the fabrication and design of it; I also spoke to someone that fabricated their own barrel throttle for a Subie flat 4. I feel that I should develop a more traditional intake manifold first, to refine the tuning process. I'll post some details of my plans for intake 1 later.
Nate
|
|
|
|
FastIndyFiero
|
MAY 12, 02:49 AM
|
|
So here's the idea for the runners:
The radius of the ends of the ports is about 0.63". So I got some 1-3/8 tube to cut in half. Then I'll just weld two bent flats of aluminum between the two, and I'll have bent runners that are the right size without trying to form things the hard way, like smoosh round tube into ovals and try to bend that. Eventually I'd like to do carbon runners.
And, I started to put down a rough idea of what I'm wanting for the throttle, for each cylinder:
It has quite a few things left to work out, and some basic design still to be determined.
|
|
|
|
Tomcars1
|
MAY 13, 12:46 AM
|
|
Nate,
Have made a contact with Cosworth and two technical documents on the Super Duty Twin Cam engine are available. I will E-mail you both : one is a detailed specification on the 2.7 and 3.0 Liter versions of this engine with setup / assembly / and start-up instructions. The second document is a parts list for the Twin Cam conversion kit. The kit is very complete as provided from Cosworth - it included everything for a long block except the GM engine case, crankshaft, oiling system ( both a wet sump and a dry sump was used on these engines - the dry sump being the more common for non-drag racing ). The intake system was optional - both Cosworth Digital Fuel injection or Carburation. Unfortunately - most of the components listed by part # are no longer carried in stock by Cosworth. My contact may be able to locate engineering drawings and assembly drawings / instructions for us in the near future. Will have to wait and see on this. Cosworth may have one ( 1 ) Twin Cam conversion kit still available - they will be finding out if it is a complete kit on not. This Kit is VERY complete with most internal recipricating components : Forged pistons, Steel forged rods, etc.. Price will reflect this completeness - initial quote of $8,500 - if complete and available.
Some of the specifications are quite suprising - 2.7 L engine had torque of 234 Ft/ Lbs @ 6500 with a max speed of 8750. 3.0 L engine had torque of 260 Ft/Lbs @ 6500 with a max speed of 8500.
So - your expected power output looks to be realistic in a turbocharged form. This engine - using the GM SuperDuty case and crank is very stout - but Cosworth admits that it is heavy in comparison to competing engines - but that is your advantage in a forced induction format.
Tom .
|
|
|
|
FastIndyFiero
|
MAY 22, 06:12 PM
|
|
Have recieved Tom's email, quite priceless Cosworth documents at this stage.
I've been refining the above barrel throttle, it's starting to look more like reality and less like a pipe dream. Only a minimal amount of work will have to be done on a CNC machine, which I don't always have access to. The rest can be done on a manual mill and lathe.
This has been taking the sideburner to my "other" project:
Though me and my buddies have been known to take a break 
Still going....
Nate
|
|
|
|
KurtAKX
|
MAY 28, 09:41 PM
|
|
|
|
|
FastIndyFiero
|
MAY 30, 12:59 AM
|
|
|
I recieved some of the parts (bearings, fasteners, o-rings) for my prototype throttle body, I'm getting pretty amped about that. No news yet about the timing cover and all that business.
|
|
|
|
