https://youtu.be/npRdCfRdxns

This is from a local YouTuber that interviews legends of NASCAR. You 'll enjoy this one. I didn't know there's was a twin cam Fiero making 400HP in 1984!
Enjoy it!

quote Originally posted by La fiera: I didn't know there's was a twin cam Fiero making 400HP in 1984!

That was probably the SD4 with the Cosworth head.

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My World of Wheels Winners (Click on links below)

3.4L Supercharged 87 GT and Super Duty 4 Indy #163

quote Originally posted by fierosound: That was probably the SD4 with the Cosworth head.

That is sexy!!!

quote Originally posted by fierosound: That was probably the SD4 with the Cosworth head.

That picture was my desktop background for a LONG time.

What is sad is these were exotic like full on race engines and today we have stock 4 cylinders that are daily drivers.

It is amazing how far we have come.

I recall one of these heads at the Pontiac Nationals. It was not cheap and needed a lot of other expensive parts to make it work.

SD4 race engines.

Originally posted by Orief:

quote Well the "Rod Shop" built and drag raced an 85 Fiero with a 3.0L SD4 dyno'd at 385HP and has a documented 1/4 mile time of 10.47@126mph. Car and Driver in March of 1985 tested 2 street SD4 Fiero's and Bob Earl's SD4 race car. Both street cars were 2.7L TBI SD4's with 230HP engine dyno'd engines. The 1/4 mile times were 14.6@96mph 0-60 times were 6.2 seconds. Bob Earl's Race car was 2.7L port injection rated at 285hp. 0-60 is 4.0 and 1/4 mile was 12.2@112. (Remember The race car only weigh's 2100lbs) High Performance Pontiac Magazine took a 1982 Firebird and dropped in a 2.7L SD4 rated at 272HP using a 4-bbl carb and it ran a 13.2@100mph in the 1/4 mile. Hot Rod magazine made a Fiero with an SD4 topped with a 16-valve head. I think the magazine was August or October 1985. Not sure of the HP rating but it was over 200. Just found the article, It's Hot Rod Magazine October 1987. The SD4 was 3.0L 16-valved head dyno'd at 272hp. 0-60 was 5.3 seconds and 1/4 mile was 13.2@102 Vanderley Engineer is rumored to have built a 3.0L SD4 run on alcohol/methane fuel and maxed it out at 535hp.

I remember hearing about the 535hp car, and here's what I posted previously on that.

LARRY MORGAN REMEMBERS HIS MAGICAL FIERO
http://competitionplus.com/...rs-his-magical-fiero

"Here is the Larry Morgan "Rod "Shop Super Duty 4 drag car from the mid - late 80's.
This is the most powerful SD4 built, it was the 3.0L version and put out 538hp at the shaft.
This car ran consistent 9's in the 1/4 with a 4 cylinder Pontiac engine!! "

More: https://www.fiero.nl/forum/Forum1/HTML/096552.html



Larry Morgan video from 1991

[This message has been edited by fierosound (edited 10-17-2022).]

SOLD

[This message has been edited by FIERO JOHN-WI (edited 10-25-2022).]