NA Specific Mods
05-16-09 | 06:08 PM
#27
no one picked up on the OP wanting a downpipe?
To the OP unless you are talking about the RB "downpipe" which should be named a cat replacement pipe but is only called that when sold as a kit. This would help eliminate confusion for noobs
To the OP unless you are talking about the RB "downpipe" which should be named a cat replacement pipe but is only called that when sold as a kit. This would help eliminate confusion for noobs
05-16-09 | 09:05 PM
#28
05-19-09 | 04:46 PM
#29
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Joined: Mar 2009
Posts: 13
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From: Phoenix, AZ
I worked all weekend, so I haven't had a chance to check back in with you guys.
Honnestly, this is the reason I got an NA over a turbo. I'd heard NA's last forever, and are generally in better condition than turbos since people AREN'T trying to hotrod them. Maybe down the road I'll get a turbo, but for now I've got an NA and thought that a little more power isn't detrimental to the longevity of the engine would be nice. I say porting isn't out of the question because it'll probably need to be rebuilt in the next 5 years, so I figured I'd weigh the pros and cons in the meantime.
I guess I should've said straight pipe or test pipe instead of downpipe. All my friends say it and it just wears off on me
I'd put one in but I'd have to do the fish bubbler thing to get the actuators working so whatever.
Ok, that makes sense to me. So far I think I'll go with headers and a complete exhaust, CAI with box, NGK plug wires (mine are stock), lightweight flywheel (eventually), and probably an S-AFC. I'm also gonna look into a TB mod and maybe porting the intake. Anyone know anything about those? I've also heard removing the crush washer on your stock plugs helps out.
Great thread! They talk a lot about swapping in 550cc secondary injectors and a TII fuel pump/FPR. Anyone have any experience with this? Aparently with all the mods one of the members in said thread has, it's possible to hit 200+ HP with stock ports. I assume that's at the flywheel lol. Here's all the stuff he has because it's relevant:
Time to throw my dog into this hunt...
The best thing about the NA rotary is it's reliability in stock form.
It's not that unusual to see (basically) stock cars with near 200K miles, still running fine.
Mine is approaching 190K and is an excellent daily driver.
IMO, attempting to hotrod the NA is almost a waste of time- you give up the longevity/reliability and still don't have much power...an extra 40-50 hp ain't much of a return for what it costs.
The best thing about the NA rotary is it's reliability in stock form.
It's not that unusual to see (basically) stock cars with near 200K miles, still running fine.
Mine is approaching 190K and is an excellent daily driver.
IMO, attempting to hotrod the NA is almost a waste of time- you give up the longevity/reliability and still don't have much power...an extra 40-50 hp ain't much of a return for what it costs.
I guess I should've said straight pipe or test pipe instead of downpipe. All my friends say it and it just wears off on me
I'd put one in but I'd have to do the fish bubbler thing to get the actuators working so whatever.^^^ yes, the S-AFC is used to lean or add fuel to the mix by tricking with the AFM inout to the ECU. In a N/A car, not much is gained by adding fuel as they run pig rich, unless you have a ported motor. But with an safc in a N/A you can lean it out a bit, giving a little more power. With a turbo motor, you can "safely" control the fuel mix running larger injectors and adding more boost.
If you want to get 200 Naturally Aspirated HP, my advice would be to only take advice from verified members of the N/A 200HP Club.
Not one of the bench-racers above are members. If they were, they would have told you.
Next best thing, look in the archive for this thread https://www.rx7club.com/2nd-gen-archive-72/how-make-beefy-n-need-your-recommendations-31410/
Not one of the bench-racers above are members. If they were, they would have told you.
Next best thing, look in the archive for this thread https://www.rx7club.com/2nd-gen-archive-72/how-make-beefy-n-need-your-recommendations-31410/
Originally Posted by mazdaspeed7
Heres my current mods:
cone filter
TB mod
ported intake manifold and black plastic elbow
RB dual outlet headers-->true dual exhaust
all emissions removed, including air pump
6 port sleeves removed
electric fan
UD pulleys, main and alternator
TII fuel pump and 550 cc secondaries
A/c and p/s removed
Crane Hi-6
NGK plug wires
timing advanced
some weight reduction...~2600 lbs
coilovers
Coming within the next week:
Mustang MAF sensor(the 73mm hot wire type)
bored out TB
nylon inserts to smooth out the 6 ports
a little more work to the intake manifold
cone filter
TB mod
ported intake manifold and black plastic elbow
RB dual outlet headers-->true dual exhaust
all emissions removed, including air pump
6 port sleeves removed
electric fan
UD pulleys, main and alternator
TII fuel pump and 550 cc secondaries
A/c and p/s removed
Crane Hi-6
NGK plug wires
timing advanced
some weight reduction...~2600 lbs
coilovers
Coming within the next week:
Mustang MAF sensor(the 73mm hot wire type)
bored out TB
nylon inserts to smooth out the 6 ports
a little more work to the intake manifold
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