So I've been talking to Science of Speed and talking about engine work and going either turbo or S/C. Personally at 99K miles I thought an engine refresh would do, which to me is new valve-cover gasket, titanium retainers and dual valve-springs, head gasket, and timing guide and engine inspection. I heard that superchargers in the long run are less reliable because of constant boost that cause problems for the top of the piston but Im not sure if that's right. So I was thinking turbo, but idk. Talk me into one of the two. Prices are similar.

 

How much power do you want? If not power, what 1/4 mile number are you looking for?

Will this be daily driven?

 

You will most likely be in boost or at least much less boost with a supercharger. I would say the sc is hands down much more reliable over all but a properly done turbo setup can be fairly reliable as well. There's no constant boost. If your not heavy on the throttle you won't have any boost.

 

sos, like all kits, uses a bpv to bleed boost under vac.

Turbo will give better usable power in the 400+ range.
sc is less drama and less maintenance, but also less power.

 

And see I lean more towards an S/C because I want more power but not over kill. Plus Im all about reliability at this point. Do you guys think I should do any engine work? Banjo bolt is a for sure thing.

 

if ap1 valve retainers hands down are a must.

 

What? LOL

 

AP1 valve retainers here and 165k miles and boosted for a couple of years with no issues. They are weaker but if not cracked they are ok.

 

Try turbo first, if it gets to be too much of a headache then sell it & get an s/c kit.

The only thing you "need" to do to a healthy F20 is the oil squirter upgrade.

 

werent some of the f20's equiped with the upgraded squirters?