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GM 2.5L Iron Duke I4 Engine Guide - Junkyard Mob
https://junkyardmob.com/guides/gm-iron-duke#:~:text=The%20Iron%20Duke%2C%20also%20known%20as%20the%20Pontiac,is%20a%20single%20cam%20overhead-valve%20inline%20four-cylinder%20engine.
Iron Duke engine - Wikipedia
https://en.wikipedia.org/wiki/Iron_Duke_engine
Riding with the Iron Duke - Engine Builder Magazine
https://www.enginebuildermag.com/2014/07/riding-iron-duke/
Power: 85-110 hp Torque: 123-135 lb·ft . Innovations: • One of the first all-metric fastener engines from GM. • Throttle Body Injection By 1988, the Iron Duke had a roller camshaft, balance shaft and even a distributorless ignition system. Other improvements over the years included new pistons, rods, crankshaft and an in-pan oiling system.
GM 2.5L Iron Duke I4 Engine Guide - Junkyard Mob
https://junkyardmob.com/guides/gm-iron-duke
Iron Duke - Horse Racing Nation
https://www.horseracingnation.com/horse/Iron_Duke
Iron Duke horse page with past performances, results, pedigree, photos and videos. Iron Duke horse rating and status. See who is a fan of Iron Duke. ... Get a Career in Horse Racing! Search All News-----Featured Blogs - From Coast to Coast - HorseCenter Video Show - …
Speedway Motors Iron Duke GM 2.5L Engine …
https://www.speedwaymotors.com/Speedway-Motors-Iron-Duke-GM-2-5L-Engine-Performance-Kit,389998.html
Speedway Motors Iron Duke GM 2.5L Engine Performance Kit made by Speedway Motors, for as low as . Talk to the experts. Call 800.979.0122, 7am-10pm, everyday. ... Are you working on a 151 c.i.(2.5L Iron Duke) 4 cyl? This top end performance kit is eaxcatly what you need to take the Iron Duke to the next level. This kit features a Hydraulic-Good ...
Iron Duke is Making a Lot More Power! - Pennock's Fiero Forum
https://www.fiero.nl/forum/Archives/Archive-000001/HTML/20010924-2-008816.html
That’s a huge improvement form the stock engine! A modified Iron Duke may not be faster than some supped up v6 fiero’s but it would keep up with or beat a stock v6 fiero. With a super duty duke making 190 horsepower and an 8000 rpm redline that same fiero would go 0-60 mph in 6 seconds and run the quarter mile in 14.2 seconds @ 97.4 mph.
Iron Duke race motor??? - Don Terrill’s Speed-Talk
https://www.speed-talk.com/forum/viewtopic.php?t=6586
According to the old Pontiac literature, that high port head is only about 5% to 7% better, (about 300 cfm of airflow at .700" on the intake side), when both are fully ported. Way back when, (in the late 80's), we even used two of those heads on top of a 400" olds V8.
For the last time, the Iron Duke was not the same engine …
https://www.hemmings.com/stories/2019/09/20/for-the-last-time-the-iron-duke-was-not-the-same-engine-as-the-chevy-ii-four-cylinder
A SOHC variant of the Quad 4 was intended to replace the Pontiac 2.5 L Tech IV OHV "Iron Duke" engine. Debuting in 1992, this Quad OHC was an eight-valve engine and produced 120 hp (89 kW), 40 hp (30 kW) less than the Quad 4 of …
Iron Duke Performance FAQ | fiero151
https://fiero151.wordpress.com/iron-duke-performance/iron-duke-performance-faq/
It was designed for low performance cars and low performance driving. The stock crank is cast and weighs 30-35 lbs. The Super Duty counterpart is forged 4340 and weighs 50 lbs. The SD motors started to blow up at about 9,200 RPM according to Vanderly. These were under controlled dyno room conditions.
strokerS10’s holy grail of 151 performance ... - Iron Duke 151 Fiero's
https://fiero151.wordpress.com/iron-duke-performance/strokers10s-holy-grail-of-151-performance-data-2-5l-myths-and-differences/
The absolute single greatest upgrade for a real Iron Duke performance engine (that will stay together) is the addition of a forged Super Duty crankshaft with a good set of connecting rods. In my estimation this gives you a bottom end that can easily withstand 200 to 225hp (or more) in a stock S10 block with no problems.
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