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Pontiac Fiero 232 HP engine pace car for the 1984 Indianapolis 500 by Steve25
Started on: 08-26-2021 10:37 AM
Replies: 7 (293 views)
Last post by: pmbrunelle on 09-10-2021 12:17 PM
Steve25
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Report this Post08-26-2021 10:37 AM Click Here to See the Profile for Steve25Click Here to Email Steve25Send a Private Message to Steve25Edit/Delete MessageReply w/QuoteDirect Link to This Post
I ran across an interview with John Callies where he talks about building this car.

Handy link to the interview with John

What was the engine?
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fierosound
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Report this Post08-26-2021 10:46 AM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote


What was the engine?


Pontiac SD4 - Super Duty 4-cylinder
https://en.wikipedia.org/wi...ke_engine#Super_Duty




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[This message has been edited by fierosound (edited 08-26-2021).]

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2.5
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Report this Post08-26-2021 12:32 PM Click Here to See the Profile for 2.5Send a Private Message to 2.5Edit/Delete MessageReply w/QuoteDirect Link to This Post
You can see one of the actual pace cars the way it is today at Midwest Fiero Clubs events. For sure at the Fiero 40th Anniverasry being planned for 2023, where there could be more than one.

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Dennis LaGrua
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Report this Post08-26-2021 01:33 PM Click Here to See the Profile for Dennis LaGruaClick Here to Email Dennis LaGruaSend a Private Message to Dennis LaGruaEdit/Delete MessageReply w/QuoteDirect Link to This Post
I thought that the high point for the SD4 engine was more than 232 HP but the guy that built it should know. While the engine is capable of making this type of horsepower , that INDY engine had a full race cam and was probably not very streetable. Those engines still cost a lot of money and the only advantage that I can see is that it bolts right into a Fiero that had a tech IV Iron Duke. The swaps that I have seen probably make closer to 200HP, not bad but considering the cost the HP per $ ratio doesn't seem great.

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R Runner
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Report this Post08-26-2021 07:35 PM Click Here to See the Profile for R RunnerClick Here to visit R Runner's HomePageClick Here to Email R RunnerSend a Private Message to R RunnerEdit/Delete MessageReply w/QuoteDirect Link to This Post
John is the MAN!

As far as the HP, he gave me some "classified" numbers the SD was making toward the end of the program. They could not release some of the HP numbers because of the competition at the time. I can say they were north of 400 but would have to do some digging to give you an exact number. John and I worked on a couple of his presentations together for the Fiero events (25th and 30th) as well as the NIFE Artical several years back. At some point I need to dig through Paul Vanderley's personal notes on the SD4 that John gave me when Paul passed to see if there are any gems.

Paul

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hyperv6
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Report this Post08-26-2021 09:32 PM Click Here to See the Profile for hyperv6Send a Private Message to hyperv6Edit/Delete MessageReply w/QuoteDirect Link to This Post
I have seen sprint car versions of this engine claim 500hp. The sprint car guys loved this engine for a good while.

But today what we have in many of these Turbo 4 cylinders makes these engines look like nothing.

My LFN Ecotec was tuned with a GM tune and saw 23 PSI of boost on pump gas as a daily driver. It was at 300 HP and limited torque at 315 FT LBS due to the trans axle.

Pontiac Performance ran a 500HP version for a full year with no tear downs or broken parts and won the Drifting championships.

John Lingenfelter ran it in Pro Stock Drag trucks and saw up to 1300 Hp before he could crack a stock head.

Imagine if they had that tech back then. It is a shame they never got far with the DOHC version.
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edfiero
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Report this Post09-10-2021 09:57 AM Click Here to See the Profile for edfieroClick Here to Email edfieroSend a Private Message to edfieroEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Dennis LaGrua:

I thought that the high point for the SD4 engine was more than 232 HP but the guy that built it should know. While the engine is capable of making this type of horsepower , that INDY engine had a full race cam and was probably not very streetable. Those engines still cost a lot of money and the only advantage that I can see is that it bolts right into a Fiero that had a tech IV Iron Duke. The swaps that I have seen probably make closer to 200HP, not bad but considering the cost the HP per $ ratio doesn't seem great.



The original SD4 head was iron, just like the Duke head. They later came out with several other better flowing aluminum heads, which led to higher horsepower numbers.

I run an SD4 in my 84, and you're right on a cost per HP ratio its not a good swap. The engine is as loud as a race car too, with the solid lifters and straight cut timing gears. But it's still kinda cool to have an actual Pontiac engine (not a corporate engine like the 3800) as my swap.

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pmbrunelle
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Report this Post09-10-2021 12:17 PM Click Here to See the Profile for pmbrunelleClick Here to Email pmbrunelleSend a Private Message to pmbrunelleEdit/Delete MessageReply w/QuoteDirect Link to This Post
Put a turbo on the SD4 if you want to reduce the cost/HP ratio, at the expense of turbo lag / losing throttle response.
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