1990 rx7 na power mods
#1
Junior Member
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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.
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.
#2
Information Regurgitator
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.
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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rotary#10 (08-09-19)
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