I have a 1991 s5 rx-7, non-turbo of course, juz wondering if its better to upgrade it and not turbo it? or turbo it and if so wut do i need to do to turbo it? Basically wuts the better option non-turbo or turbo?

 

What are you looking to do with the car? Daily?

 

Well im in the army so i haevnt had a chance to drive it yet...it sits at home with 65,000 miles on it. Dont even know how fast they really are...came from the honda scene. Anyways i want it to be fast so i dont get bored with it real quick... i planned on doing a ls1 swap but thats not for a long time prolly so i want to throw prolly around $3500 into it and at least run around 13 1/4 miles if thats possible.

 

Go with a turbo engine swap, theres not much you can do to an n/a to get good power without breaking the bank. However it all depends on what your goals are and what you want to do with it.

 

how much is the swap and y cant i just bosst it and change the ecu?

 

All this has been covered in many threads before. Searching will help you.

TII Swap is the best way to make power on a budget. TII Drivetrain swap is recommended but not required.

 

If you have a 91 S5 with 65K miles, Sell it and take the additional $3500 and buy a Turbo II. Even if it is a dead TII it will still cost less to rebuild that motor to run 13's then make your current car run that fast.

$3500 is not near enough for a NA S5 to run 13's without alot Nitrous. In order to run 13's a rebuild will be required with a big port job and a full race exhaust. $3500 will not cover that. At least not if it is done correctly.

 

sell it for 4K and buy a TII.

 

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