So while I was putting together the 3.4 pushrod I have on the stand in my garage, I got the idea to attempt to fabricate mounts for the Lysholm twinscrew supercharger from a Mazda Millenia that I had laying around. There isn't a whole lot of information on it, but Lysholm said that it was similar to their 1.2L compressor. I plan to place it where the AC compressor was and use an oil filter relocation adapter to get it closer to the block. My question is, will this supercharger fit the engine's airflow requirements to make all this work worth it? I don't know how to translate the compressor map correctly. I've tried googling it and found a few ways to interpret it with regards to the 3.4 engine, but I don't know which is correct. I don't want to run much more than 10 psi boost. I need to tie it into the engine oil, and I plan to keep the throttlebody in the stock location and running a blow off valve before it. The compressor has a 4 inch pulley IIRC and there aren't any aftermarket sizes available. Hoping to get around 200 horsepower.

Let me know if I'm crazy.



This isn't my picture, but I'm not at home to take a picture of my supercharger.

Garrett has an app that allows you to plug in your engine's numbers and find the required airflow to support the requested horsepower.

I can tell you that, theoretically, 15psi = double your horsepower. It doesn't work quite this way due to various efficiency losses but it's a good planning tool. So, the 3.4L PR engine is 160 hp stock. 15psi will give you ~320 hp. So your 10psi will give you more than 200 engine hp. Anyway, get the Garrett app and look at the airflow numbers for 200 hp.

And yes you are crazy! This is a Fiero, we are all crazy. Good luck.

Your crazy. Not for doing the supercharger, but for doing any forced air for less than 50hp.

quote Originally posted by Custom2M4: Your crazy. Not for doing the supercharger, but for doing any forced air for less than 50hp.

I want at least 200 horsepower. If I get more then great. I just thought it would be a fun project to try out since I have a welder and a supercharger.

I plugged my numbers in that app and it said they were too low.

I plugged in some numbers and got 250 crank hp at 9.25 psi with a pressure ratio of 1.63, no intercooler, max airflow 22 lb/min. Your supercharger graph is in cubic meters per minute but I don't know how to convert to pounds per minute.

This is mid range 3000 rpm and max power at 4500 rpm.