2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

What can you do performance wise to a 13B non turbo?

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Old Apr 1, 2007 | 01:19 AM
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What can you do performance wise to a 13B non turbo?

I pretty sure this is all i can come up with.
1. Racing Beat Exhaust
2. Port and polish
3. Performance Pulleys
4. Electric Fan (even though it doesn't do much)
5. Block off plates for all emissions
6. air intake cone filter
Really that is all i have if anybody else has anything else better please tell me so i can add it to my list.
I was thinking e manage from greddy would be good but see I thought that it was for a turbo I could be wrong though.
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Old Apr 1, 2007 | 01:28 AM
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well there is a number of stuff you can do to an engine it all depends on how much money you wanna put into it
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Old Apr 1, 2007 | 01:36 AM
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Im surprisedd you havent been flamed by one of the search fanatics yet, since there are numerous threads covering 13b NA mods, and how to get more power from your na. I dont know many of the mods off hand, but I will be modifying the living sh*t outta my car when I get my engine back.
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Old Apr 1, 2007 | 01:48 AM
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try buying a ported throttle body from bdc at http://stores.ebay.com/BDC-Motorsports
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Old Apr 1, 2007 | 02:33 AM
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Non -turbo...
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Old Apr 1, 2007 | 07:44 AM
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https://www.rx7club.com/2nd-gen-archive-72/how-make-beefy-n-need-your-recommendations-31410/

Thats a good thread.
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Old Apr 1, 2007 | 09:09 AM
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Add Turbo to your list.... No really, you can turbo your N/A thats a pretty nice performance mod.
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Old Apr 1, 2007 | 10:25 AM
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There is a thread in the archives called "how to make a beefy n/a". That is where to start.
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Old Apr 1, 2007 | 10:35 AM
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Originally Posted by killalot13601
Add Turbo to your list.... No really, you can turbo your N/A thats a pretty nice performance mod.
word
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Old Apr 1, 2007 | 11:44 AM
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engine porting
SAFC with wideband
pinneapple racing sleeves
TRUE DUALS from RB
50 wet-shot of NOS ( installed properly)
you can go with a carburator set-up from RacingBeat.

i think with the mods you listed and the rest of the mods ppl here recommended you might be able to see a whopping 180-210hp on an NA if tuned right. Depending on the port job it might still be streetable. anything over stock is good but expect the car to be less streetable the closer you get to 210hp.

Last edited by phoenix7; Apr 1, 2007 at 11:56 AM.
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Old Apr 1, 2007 | 01:26 PM
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So for a Rx7 would 210hp be good for a FC I mean FC are pretty heavy unless you give it a slim fast.
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Old Apr 1, 2007 | 01:40 PM
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Originally Posted by RX7freak08
So for a Rx7 would 210hp be good for a FC I mean FC are pretty heavy unless you give it a slim fast.
yeah 210 at the wheels is about the limit for an NA (and thats with probably close to 4-5k in mods).

Im running:
block off plates
CAI
*slightly* larger injectors
fairly agressive street port

and Im at about 175 at the wheels @ 6k RPM. I could also do seperate fuel control system, but franly I dont want the trouble. This is my daily driver and I dont wanna always be fekking with it 150-175 AT THE WHEELS is fine to get you into or out of trouble with daily driving IMHO.
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Old Apr 1, 2007 | 01:52 PM
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well the S4 models can be as light as ~2600bs(s4 5-spd) and the heaviest S5 can weigh as much as 3025lbs(S5 vert.)

so If you have an S4 and you remove 200lbs of crap you're looking at 2400lbs car with 210hp

you can go on a diet for the S5 vert and be down to 2800lbs and 210 hp will be plenty quick.

is the FC heavy? when comapred to a miata, it really is. when compared with a V6 or V8 anything? prolly not.

if you are one of those ppl that are power hungry ( perhaps compensating for something ) and want 400, 500 or 600hp then you're using the wrong rotary platform. If you are indeed displeased with your peni---err---power then you should look into investing in a TII or swap a 13BT in to an early model FC (86 and 87)

Last edited by phoenix7; Apr 1, 2007 at 01:59 PM.
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Old Apr 1, 2007 | 02:03 PM
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How much would you get if you installed one of these?
http://www.tweakit.net/shop/product_...1b&detail=true
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Old Apr 1, 2007 | 02:35 PM
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I don't think it would be hard to install it but how knows. Know if 5000 grand is just going to get you 210 hp then what is the point of having a n/a i mean for about 1500 you can get the T2 and have the same amount of power and maybe more with what money you have left over. I kinda made my decision
1. Racing beat downpipe for n/a, to presilencer, and custom muffler I have a rx7 person make it
2. I probably going to have a porting done to intake, ports, and throttle body.
3. I going to get Wide band 02 and E manage from greddy
4. Get a LSD
5. intake with cone filter
6. I know supercharging it would be bad and cost more probably than i turbo but all i can tell you is that it would probably be hard to put a turbo on my 13B

If there is anything else that you want to add let me know I mean I'm guessing my price range is about 3000 maybe more i don't know yet.
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Old Apr 1, 2007 | 02:50 PM
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r u doing all this work and spending all this money on a stock engine that has high miles...if so you are looking for trouble
try to get a budget set and if u are trully a rx7freak u would consider a rebuild and start off with a fresh platform than to drain 3k on a car that when it blows you wont have enough to rebuild

its my .02 cents
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Old Apr 1, 2007 | 02:51 PM
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nitrous. wideband that'll read down maybe even below 10:1, and a stand alone. make sure the motor has good compression and you have the fuel to sustain the nitrous and that is the best way for a non turbo to make power other then that your gonna be looking at spending alot of money and not getting much. so what i would pick from is nitrous or a turbo. ps nitrous does not kill engines bad tuning does but a used na engine goes for about 300-500 dollars
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Old Apr 1, 2007 | 03:07 PM
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Sorry to butt in, but I was wondering if it matters if you start off with a NA s5 engine vs NA s4? Im new to rotaries.

My coworker used to have a bridgeported rx-3 with 48mm carbs on it. It sounded awesome, but I dont know any power #'s.
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Old Apr 1, 2007 | 03:29 PM
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kind of depends on the car your using and drive train s5 uses high compression producing high numbers.
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Old Apr 1, 2007 | 03:42 PM
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S5 has higher compression and better intake manifolds, if you go carb or ida etc it doesnt matter too much though.
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Old Apr 1, 2007 | 08:17 PM
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Ummm really It is a high miles car but if i did blow my engine it would give me a perfectly good explaination to buy another engine so maybe if i get everything that i need and get the engine to blow up not like kill it and then just buy another one.
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Old Apr 1, 2007 | 08:59 PM
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ummmm Ok so will any Greddy E-manage work like if someone used it one a skyline but i want to use it for the rx7 will it still work.
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Old Apr 1, 2007 | 09:24 PM
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One more question will it work on a non turbo rx7.
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Old Apr 1, 2007 | 09:44 PM
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it should, the emanage does work with the rx7 pretty sure both turbo and na, there is something about the wiring thats strange, you can search and find it ill be looking soon i actually have an e-manage to hook up but im waiting to get the car running and all the bugs out of it before hooking up the emanage.
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Old Apr 1, 2007 | 10:29 PM
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I'm going to have to chime in with El Nene... and really sounds like you don't know what you're talking about, and now you're talking about installing a stand-alone system??? Who's going to tune it? Do you have any idea what the proper A/F ratios are? How about ignition timing? Recomend spark map/advance curve? What about proper dwell for your ignition?? This is not a "bolt-on" performance mod you're talking about here, this is serious engine tunning sofware/hardware, and if you don't know what you're doing with it then it's just going to be a $1,000 piece ofr junk sitting on the shelf in your garage. Listen to what people are telling you, start small, learn bit by bit. Don't try to jump into the deep end wearing floaties, and another thing it REALLY upsets me when people act like "It's no big deal if I pop my motor, I'll buy another one...." I don't know if you've noticed but most of our engines are OVER 20 years old, AND not produced any more, which means that if I need to rebuild my engine then I'm going to have to use junk parts, and if you and other guys like you destroy all of them then there won't be anymore parts!!!!!! There is more than enough knowledgde in this forum, acquire some of it, PLEASE!

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