B18a1 with rods and pistons. Td04 turbo ,pro 2 IM . 1000CC FICS.
ive come to the point of upgrading the head and my question is, can/ should i run dual springs on factory cams? Im open to suggestions but have been eyeing the BC2020. Will this cause problems until i get new cams?
YES I WILL BE STAYING STRAIGHT LS!

 

You want to use valvesprings that are set to the stock valve spring seat pressures with the stock camshafts. Most, if not all aftermarket companies will only offer a dual valvespring/retainer combination. I'll be perfectly honest, you won't need aftermarket camshafts unless you're running over 60lbs/min or more, on the turbocharger. If you reach that point, (outside of your TD04-???) you'd have to make sure a second time that the valvetrain that you use will work with the aftermarket camshaft that you choose. In most cases, depending upon the specs of the camshaft (as well as purpose, rpm, etc) You would have to change valvetrain to match with an aggressive camshaft anyway.

If you use a valvetrain that is too high of a spring seat pressure with your stock camshafts, you'll end up ruining the camshaft and the valvetrain. There's really no "planning ahead", when you don't even know what aftermarket camshaft you plan to use yet, (if any).

My recommendation is to get a nice dual valvespring setup (Crower, Supertech, or even Skunk2 come to mind) that uses close to OEM valvespring seat pressure for the stock camshaft. You're not going to outflow the camshafts capability with a TD04 sized turbocharger under 50lbs/min (Largest Td04s I've seen were about 38lbs/min or less. And I've seen and used a lot of Td04 sized housings on a variety of MHI-variant turbochargers.

Hope that helps a bit. And welcome to H-T..

 

Hey, thanks for the warm welcome and thought out response. I appreciate the point of view along with the reasoning.
I do enjoy driving the car on the street and am not sure if it will ever be a strip only car. So, with that and your suggestion in mind, you say stock cam. Spring and retainer upgrade for the rev limit, but factory cam as to not be overkill?
I had been thinking bc0021 cam with the supporting springs/ retainers

 

It is good thinking on your part to plan ahead. Having said that, however, the answer is yes. You are overthinking. Hondas are a bit more robust to take forced induction than many people believe. Only change what is needed if the valvetrain is worn. Don't worry about the camshafts for that turbocharger, regardless of purpose ... in this case..