View Full Version : FI Questions
12-24-2006, 06:27 AM
hey guys i have an old 350 block sitting in my garage and i was thinking about building it up either into a 350 or boring it out and dropping a 383 crank into it. now here is the question i have for u guys. what would be better to get, a turbo or s/c?? and which ever one u guys chose tell me why and where can i get them. thanks guys, also i would like some help on what parts need to be installed to stand up to the boost. so please let me know. btw its going into my '94 chevy 1500 ext cab stepside. and it currently has a 5.7L 350, i was thinking about adding a turbo or s/c to it, but idk, and if ya think i should do that then say so. so thanks and please get back to me.
12-26-2006, 08:20 PM
well, i can let ya know some of the pro's and cons of each. based on a combo in a truck to around 600 crank hp.
likes more static compression, so you will have better bottom end throttle responce. you can do this due to the superchargers linear boost curve, and high boost not coming on till high rpm. gas mileage will typically be better running a supercharger also due to the higher comp and slight positive pressure at cruise speeds.
needs a little lower static comp due to the fact it can hit full boost in the mid-range, right at max cylinder filling and increase chances of detonation if lower comp is not used. this can make for a little soggy feeling motor right off the line. turbo systems are simple to put together though, and can sometimes be done for cheaper than a supercharger "kit". twins will work better than singles in both terms of spool time and hp requirements. a fast spooling set of turbos will help that bottom end.
i personally have done both, and not to sure where to stand on it. the turbos can be brutal when they spool up, but the supercharger is more predictable to drive and will come on very similar to an n/a power curve. if i go f/i on my truck though, i think a supercharger will be my choice.
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