Can you put one of the TBIs off a Corvette TBI onto the stock intake manifold of an Iron Duke? I was emailed by someone when I was looking for the Holley TBI that said you can use the TBI off a crossfire V8 on the Iron Duke. I was wondering if anyone else has heard of this?
Thanks Grant
PS Please don't tell me to upgrade to a 2.8L or do a 3800 swap, I like the 4 banger for the fuel economy but the stock one is just too restrictive.
We put one on my 84 from our corvette to test if the duke throttle body was the reason it wasn't running. It looked to be the exact same throttle body. I believe the part numbers might have even been the same (it was a long time ago so I don't remember), so it may not be any less restrictive, the corvette just has two. I do remember it bolted right on for us
[This message has been edited by Leukay (edited 10-16-2013).]
We put one on my 84 from our corvette to test if the duke throttle body was the reason it wasn't running. It looked to be the exact same throttle body. I believe the part numbers might have even been the same (it was a long time ago so I don't remember), so it may not be any less restrictive, the corvette just has two. I do remember it bolted right on for us
Hey, thank you for the reply! I actually thought the crossfire engine had bigger ones . . .
Originally posted by disjaukifa: Hey, thank you for the reply! I actually thought the crossfire engine had bigger ones . . .
Is still 300 TBI w/ Same injector... V8 uses 2 units. V8 Might have a bigger bore and throttle butterfly or not. You need to check the specs.
------------------ Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should. (Jurassic Park)
Those Crossfire Vettes made some pretty crappy HP numbers. I really wouldn't be surprised if the components they used were associated with the Iron Duke. Two dukes make about as much power as a crossfire injected 350
I've often thought of taking the TBI off my duke in favor of a carb on my dd Pontiac 6000 (like many of the C3 guys do with their CFI cars). But then I look at all I want to do with my 87GT and say why bother. I know it has been done though. If you are looking for a little more power and don't mind losing a little fuel economy, you may want to consider this route.
That's still a 2.5 Duke... not the 2.2 OHV. 91-93 S-10, last of the first gen/square body, had a 105HP Duke for a base power plant. The 94+ second gen/round body got the 120hp 2.2
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Originally posted by disjaukifa: Thank you for the information but I have a 1985 and I don't think that one will work for me . . .
Yeah you need the later intake and 700 series TBI of the 87-88 Fiero for that swap.
[This message has been edited by carbon (edited 10-16-2013).]
Those Crossfire Vettes made some pretty crappy HP numbers. ...
A lot of that had to do with the runners in the intake. Specifically, the ports. Half of the height of the ports were blocked where they bolt to the heads. I was amazed when I saw the pics.
There used to be an aftermarket manifold that replaced the CFI lower intake, but I can't find it now. I don't have time to find pics because I have to get to work, but if you Google "crossfire injection" you might come up with some info/mods for those throttle bodies. There is lots of info out there.
[This message has been edited by Raydar (edited 10-17-2013).]
I was amazed when I saw the pics.
