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Jazziejeff
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MAR 30, 08:17 PM
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Hello I’m trying to find information about this motor I’ve built a couple of 2.5s and still learning an would like build information 
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Dennis LaGrua
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MAR 30, 10:40 PM
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The Fiero Duke engine was not very strong and we have seen very few "performance" builds here. Its just not a good platform for anything over about 110 HP and 4500 RPM. Taking that engine above 5000 RPM and you risk breaking a rod of the crank. If you want super power from the four buy an old "Super duty" engine. It can make the power you seek and it will bolt right in
The Duke is an economy engine and for that purpose it does its job very well. Some owners with the 5 speed and the Duke have achieved near 50 HWY mpg and that is a solid figure even today. ------------------
" 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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