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| Learn me the Super Duty 4 (Page 1/3) |
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TheFieroKid
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SEP 11, 07:31 PM
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Alright, so lately I’ve been searching around and looking for different interesting engines to possibly swap into a fiero and I stumbled upon a super duty 4 head from I don’t know when.
The ad reads as follows
“ Cylinder Head This 2.5 special aluminum cylinder head is a race winning design for the four-cylinder Pontiac aluminum "Super Duty" that's proven itself in IMSA road racing and Competition Eliminator Series. This rugged, lightweight head gives you Pontiac and NASCAR quality with plenty of extra metal, and proven performance with totally redesigned, super free-flowing ports. Oversize ductile iron seats . Intake volume is 178cc. This head accepts standard four-cylinder intake port centerline manifolds. “
I’m going to be honest, I don’t know much about these engines. I do know that they are a very good set up and are quite capable of power and being thrashed on.
What I want to know is that if this is something that I can bolt on to a stock iron duke, or if I need to do some machining on the block, or I have to have the super duty 4 block.
I also am curious to how I can make this work, if there is any way to get or make/modify parts for this thing so it can run.
Hopefully we can make this work, if you know of anyone selling any parts please send them my way!
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Dennis LaGrua
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SEP 11, 07:40 PM
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The "Super Duty Four" was a high performance engine designed by GM to power the Indy Fiero and to be sold as a separate performance item.. It was never used in a Fiero production car. I don't know what head you are referring to but the Super Duty Four usually installs as a unit.
If you want an engine swap you need to define your requirements and usage. Then it will be possible for the people here to make a recommendation.
Consider factors like, weight, horsepower, torque, mileage, reliability, cost , size and ease of swap.
------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "
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Raydar
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SEP 11, 07:49 PM
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I think it can be made to work, but you'll (I'm pretty sure) have to redrill the head bolt holes in the block, and use larger fasteners. Depending upon the casting #, you will probably need a special intake manifold and exhaust header.
Now... if you get it to work, you will probably break the bottom end in fairly short order. That head will likely allow your engine to make at least twice the power that it was designed to.
Think broken rods or crank, and ventilated block castings.
It will probably go like stink. For a few days.
I have thought about similar mods for my 88 Duke, using a much milder cast iron SD head. This was with the full expectation that I would probably blow it up, at some point.
Good thing I couldn't find one of those heads.
(I don't make these comments lightly. I used to own a Fiero with an iron head SD4. It probably made close to 200 HP. It felt as strong as my 4.9 car.)[This message has been edited by Raydar (edited 09-11-2019).]
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fierosound
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SEP 11, 07:57 PM
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TheFieroKid
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SEP 11, 08:20 PM
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My usage is in a racing environment as in road race.
The cast number I have with the heads is as following : 10045437
I’m looking for things like valves and springs and all the other goodies.Where can I find the proper stuff for this set up.
What engine block do I need to make this work?
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fierosound
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SEP 11, 08:43 PM
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Raydar
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SEP 11, 10:00 PM
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Also send a message to "legutt" on this forum. He has SD stuff for sale from time to time. Has some very interesting pieces.
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fierosound
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SEP 12, 08:16 AM
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These guys no longer have a working website.
But they still exist and were producing SD4 engine parts.
It may be worth giving them a call...
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Will
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SEP 12, 10:17 AM
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| quote | Originally posted by TheFieroKid:
My usage is in a racing environment as in road race.
The cast number I have with the heads is as following : 10045437
I’m looking for things like valves and springs and all the other goodies.Where can I find the proper stuff for this set up.
What engine block do I need to make this work? |
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Have you taken your car to a track day before?
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Lilchief
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SEP 12, 04:13 PM
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Have you read 2.5l myths and differences by strokerS10 ? The 437 head is the biggest with stock location ports. The 801 is the biggest but ports are raised and moved on the intake side. My 437 flows 305 cfm at .700 lift on the intake and 235 on the exhaust at .700. The 801 flows even more. Hope this helps some.
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