IRS vs live

[Selo]

Wow, thank you for that. My takeaway is this:
Since the current owner has already done some work with heads and induction, drive it for awhile and see how it feels.
If it needs more power, carefully analyze the goals. If only a bit of tweaking is needed, ok to add piecemeal. But if serious hp is needed, best to make a wholesale change all at once.

[olddog]

Originally Posted by Selo

Wow, thank you for that. My takeaway is this:
Since the current owner has already done some work with heads and induction, drive it for awhile and see how it feels.
If it needs more power, carefully analyze the goals. If only a bit of tweaking is needed, ok to add piecemeal. But if serious hp is needed, best to make a wholesale change all at once.

At least have a plan of where you ultimately want to end up and make sure you are getting things that will meet that end. Understand that this can leave you with something that is less than ideal in the short term.

Don't be buying things that you will have to replace again, when you can ovoid it.

You certainly need to understand what you have before you start making changes. When you do not know what you have and you ask for generic advice, this means the person who is giving the desired advice has no clue what you have and is likely to give bad advice as a result. That is why I have tried to stick more with theory, as I have no clue what you have for an engine. I have mostly assumed a factory stock 5.0 from what little you have explained, but now I see it has modifications.