The Turbo Super Duty Build. (Page 62/62)
GTaylor AUG 27, 08:25 PM
A buddy had an Iron Duke AMC Spirit dirt track car that i helped develop/build the engine. He bought an aluminum SD head from Jegs that was fully ported (probably too ported for dirttrack), some 6" C&A aluminum small journal small block rods (7), Diamond pistons, Ultradyne cam, Crane rockers, Edelbrock intake. A local machine shop narrowed the big end of rods by .077" from memory to match the Duke stock crank. When scrounging for bearings, only place that would make a set wanted $200.00 just for cutting the width of "stock" SB rod bearings. I made a mandrel out of a PVC fitting with a freeze plug in one end to stiffen it to clamp the bearings to with a hose clamp. Cut .030" off one side & .045 off other in lathe. Radiused inner edge of bearing using edge of a file. Took less than an hour to make tooling and do a set of bearings. We originally had serious oiling issues till a competitor told us to see if the oil filter bypass valve had been pushed into the oil galley. BINGO! Removed and plugged hole then used a different oil filter with bypass built in.

It never ran to full potential IMO due to his choice to use BB Chevy rockers (1.72?) instead of the rec 1.55 ratio. It sounded sweet though...so i am very interested in seeing this get done. Money is always an issue. How fast can you afford to go?
edfiero OCT 14, 10:47 AM
any update?
dratts DEC 03, 12:19 PM


quote
Originally posted by FastIndyFiero:

So. Anybody know of the best place to score an F40 with the correct bellhousing?



I have two of them. Both zero hours.
edfiero MAY 23, 03:58 PM
6 months with no activity? Ready to put a fork in this yet?
FastIndyFiero JUL 10, 01:49 PM
Looks like Photobucket finally bit the dust on free hosting. I'll have to go through all the old posts and relink = /
ericjon262 JUL 10, 10:57 PM

quote
Originally posted by FastIndyFiero:

Looks like Photobucket finally bit the dust on free hosting. I'll have to go through all the old posts and relink = /




I'm in the same boat, makes my stomach turn thinking about it. I have been downloading all of the pictures I had on there, and I'm going to delete my account. I'd be willing to pay a reasonable amount, but they want $500 per year to host them...


------------------
"I am not what you so glibly call to be a civilized man. I have broken with society for reasons which I alone am able to appreciate. I am therefore not subject to it's stupid laws, and I ask you to never allude to them in my presence again."

"The day I tried to live, I stole a thousand beggars' change and gave it to the rich."
http://www.fiero.nl/forum/Forum2/HTML/119122.html

[This message has been edited by ericjon262 (edited 07-10-2017).]

michaelmount123 MAY 23, 04:01 PM
I acquired a 3L Cosworth SD4 years ago to use in a Bonneville Land Speed Record Car. It was one of the 3L IMSA engines for the Pontiac backed Fiero effort (really a Spice chassis). I freshened it, built mounts for it and fabricated the headers.



Later I ran across a brand new Cosworth 'kit' to convert a 2V SD4 to the (Cosworth) 4V version. All parts were cataloged and in individual boxes or packages. There were no subassemblies. The throttle bodies, for example, came as bare castings and all the throttle body related hardware in individual packages. There were quite a few components for each TB.



The engine was built using the Cosworth parts, a 3.625 SD crank, Carrillo rods, new (lower compression) JE pistons, and a new KRP block. I can't imagine there's another NEW Cosworth SD4 anywhere.






The new engine belongs to my friend David Wilson and his son, and will go into a street car and be either supercharged or turbocharged. He's looking for a nice Pontiac Astre, but may have to settle for a Chevy Vega. Please pass on any leads since nice ones are hard to find.

Should be fun!

[This message has been edited by michaelmount123 (edited 05-25-2020).]

Steel JUN 06, 08:22 AM
Thanks for sharing Michael, I've never seen such a clean representation of this setup before. A highly modified SD4 by 'FieroSound' is my all time favorite.. I hope to see that car in person one day.

Does anyone know if the Original thread poster 'FastIndyFiero' is still working on this project?
FastIndyFiero JUN 11, 01:22 PM

quote
Originally posted by michaelmount123:

I acquired a 3L Cosworth SD4 years ago to use in a Bonneville Land Speed Record Car. It was one of the 3L IMSA engines for the Pontiac backed Fiero effort (really a Spice chassis). I freshened it, built mounts for it and fabricated the headers.





Wow Mike! I'm excited to see another one of these built. You're definitely the right person for it. Is KRP still producing new blocks? What size head studs did you use?
michaelmount123 JUL 23, 01:14 PM
As far as I know, KRP is not making blocks. Surely a low demand issue. We got a new one along with the Cosworth kit, and a GM SD block as well.

I used the head bolts that are part of the Cosworth conversion kit. I think they were 12mm, but not sure. Torque was 80 ft. lbs. I expect to run fairly low boost, so not concerned with head lift at the moment.

MM