Holley TBI for the Duke (Page 1/1)
Brivander JAN 01, 10:49 PM
Anyone have a Holley TBI set-up floating around? Looking to get one, and yes, I know it's a long shot. I thought I had one lined up from a family member who is a long time Fiero fanatic, but he is unable to locate it!!!

Let me know, thanks!!
DimeMachine JAN 02, 08:26 AM
What year? I think they were quite different through the years - someone correct me please if I am wrong.
Brivander JAN 02, 10:03 AM

quote
Originally posted by DimeMachine:

What year? I think they were quite different through the years - someone correct me please if I am wrong.



It's for an 84' I believe 84-86 are the same, the change is 87-88 I believe, but I could also be wrong.
Dennis LaGrua JAN 02, 12:31 PM
I believe that the larger TBI injection unit for the Duke uses a different intake manifold with a larger bore. If you want to be creative try to find an S-10 in the junkyard with the Duke engine. Some of them have a larger throttle body but you will probably need to purchase the intake manifold that goes with it. Not certain about the interchange but the later Duke engines did have more horsepower.

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Brivander JAN 02, 03:45 PM

quote
Originally posted by Dennis LaGrua:

I believe that the larger TBI injection unit for the Duke uses a different intake manifold with a larger bore. If you want to be creative try to find an S-10 in the junkyard with the Duke engine. Some of them have a larger throttle body but you will probably need to purchase the intake manifold that goes with it. Not certain about the interchange but the later Duke engines did have more horsepower.





You can use it with or without the intake. That said, I have a stock intake I am porting, and opening op the bore as large as possible.
edfiero JAN 05, 10:31 AM
Yep, if keep the stock intake, you definitely need to port it to take advantage of the TBI.

I had one on my Duke for a while, but the engine didn't run smooth and I took it off and went back to the stock setup. Sold the Holley years ago.
They do popup for sale on Ebay from time to time.
There is 2 different models which can be used. One is a direct fit, and the other can be made to work, but I think there is something different about how the throttle cable connects and it needs some modification.