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1990 rx7 na power mods

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Old 08-04-19, 03:18 PM
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1990 rx7 na power mods

Hello I am sure there are tons of forums on this I have read some already but they are all over. Basically I am doing body work in the winter and pulling the motor to replace apex seals but I also want to add some more mods.

I know for sure I want to do a Bridgeport, if there is anything I should get with that setup please let me know. I also was thinking about lighter pulleys but not sure if that would be worth it.

I'm just looking for anything to make my motor more efficient and run good.
Old 08-07-19, 01:03 PM
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Unless you are going to a stand alone ecu when you put the car back together, meaning now, don't do a Bridgeport. The factory ecu won't run it properly. You have to have the control a stand alone gives you to properly tune and run a Bridgeport. Also to run a Bridgeport you need a very free flowing exhaust. Stock is too restrictive. You'd need a header and some sort of pre-silencer like Racing Beat sells and straight through mufflers at the rear. Everything need to be straight through style or it will be too restrictive for a bridge. To get the full potential of the exhaust on a bridge, or any port for that matter, the header primaries need to be tuned, usually on a dyno. Racing Beat has some recommended starting points at the bottom of the page here: Rotary Tech Tips: Exhaust System Configurations
Also a bridge would work better with a different intake manifold than the stock one as IIRC it doesn't flow enough to make the power a bridge is capable of. Runner lengths are wrong as well.

All that said if you're not going stand alone then do a street port. Though not optimum the stock ecu will run it just fine. Build an exhaust from a Racing Beat Header and other parts from them and call it done.

If you ditch your air pump you'll need a dual belt alternator pulley. Other than that if this a street car the other pulleys are fine.
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