I have a chance at an inexpensive 3800 NA Series II (80k). I already have a 3800 SC in my Fiero and I was thinking of building it in my spare time. Maybe use it as a spare and see how much power I can get out of it.

How much boost can these handle? I know the compression is higher than the SC version and overall it is not designed for boost, but still cant most engine handle about 6psi?

I can make around 300hp?

Yes. Reliably is the issue. Why not just buy an l67 long block?

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The L67 is harder to find and more expensive. I was thinking of a winter project. Like I said I can probably get it cheap.

Pistons, rods and block are different in the L67/L32. The engine was built for boost. Not sure how the N/A engine would respond to boost. Most likely it could take some boost but how much is the question and what will be the reliability?

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" 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, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, 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 "

I remember from my Corky Bell book on turbocharging he said most engines can tolerate a little boost, mild boosting with problems. I thought it would be a fun project.

I was watching the Saturday morning car shows and they slapped a Vortex SC on a 4.6 L mustang and made an additional 100 hp. I'm no newcomer to supercharging but my Fiero is already wired for boost.

10-15 psi will be fine if everything is set up and tuned right. There are popular kits that reliably run 10psi on stock engines in w bodies.

Wow, 10-15 psi would be theoretically almost twice the power. That would be close to 400hp at the flywheel.

I would need intercooling with that much boost, and that has always been a problem with the Fiero's mid engine configuration.

Anyway, this guy has not got back to me. I'm waiting to look at the engine but I notice there are lots of 3800 NAs around.

quote Originally posted by RotrexFiero: Wow, 10-15 psi would be theoretically almost twice the power. That would be close to 400hp at the flywheel. I would need intercooling with that much boost, and that has always been a problem with the Fiero's mid engine configuration. Anyway, this guy has not got back to me. I'm waiting to look at the engine but I notice there are lots of 3800 NAs around.

Meth/water blend injection.