Ok...I know I'm probably going to get a few responses from the TII guys sayin"save yourself...get a turbo"
but.....truly are there any guys out there that are willing to spend a few shiny pennies to get that NA movin..
i know there are a few NA's on here runnin 14's..good job...but i know alot of guys that doubt that the NA is capable of breakin 13's or even goin lower than 15's !
but in the whole scheme of things..the NA is the underdog..tryin to impress the Turbo guys...is it that we are Naturally Aspirated...and have not one ounce of hope Now i know alot of you guys dont know of me...but some of the older guys might remember BDC...at one point in time many people doubted him in what he believed in....but he stood his ground and kept going, now once he did something no one ever did people began to see things in his point of view.
Alot of people thought some things werent possible...
because they never tried it...but this post is just to see if there are any people out there that believe the NA is capable of producing impressive numbers in which people havent already seen from a 13B NA in an FC.........

Post your NICE & opinionated responses...thank

 

Im thinking about buying an N/A over a TII actually but im not sure. I wanna make sure that I can kill a stock 99 mustang, and i wanna be able to work on it (lol all rx-7's) and mod it so it goes faster, and not just rice it up =[. So if it IS possible to get an N/A to do 13's, or under 15's i would like to know =)

 

ANYTHING is possible. How deep are your pockets?. From your description of what youd like to do, you'd be happier with a TII.

 

The NA's forte` is handling, concentrate on that and embarrass the TII's and possibly the 3rd gens at autocross. I own both. The NA is getting the "treatment" for autocross. Quick gearbox, gears, suspension, tires. Won't be as quick as the TII on the strip or open road; but it should give it a run for the money at the autocoss and around town.

 

Well, My pockets dont run deep, but the love does =). No but seriously im a pretty poor young chap (17) but i plan on doing alot of work on it over the years, and having the car for the rest of my life. Turbo II would probably be better for me, but i'll probably get an N/A and end up doing some crazy stuff to it in my much much later years . Im not sure yet but by next summer i definetly will know whats up

 

i can certainly understand that most people would choose a turbo over a non turbo...but dont you think it would be nice to make the turbo guys jealous when you got a quick NA that has respectable numbers, and keeps up with you ?
im plannin to show a few people that it is possible...
to have a respectable NA

 

I am going to get my N/A into 13s. I currently get 98 mph in the QT.

I have a few items I can removed and I have a newer intake to put on the car.

I can already beat my buddys stock T2.

 

having a quick N/A isnt as impossible as you make it seem. I would give the 13B rotary engine 350HP to the wheels TOPS without forced induction, it is just a matter of having the money/expertise to get it there. but then you look at the new renesis which is more reliable than a third gen with the same HP and better gas mileage. the engineers at mazda are just better than us at what we do (not to mention the money and resources they have).

give me a renesis and a die grinder and some dough, we'll see who owns the drag strip AND the auto-x

Justin

 

I have no experience in rex's. But if ya do a good P&P and some good intake and exhaust work. I dunno if these cars have injectors or whatever. But up the lbs on them and you should run good against a stock T2.

Im just guessing here though. That is how it worx with my Escort ZX2. But then yet. It is an escort.

 

I'm with you, we'll see my na beast come to life soon

 

My GXL NA is pretty fast. Could do a little more and make it faster I am sure. I have my GTUs back on the road now as my NA so I will prob sell the motor and stuff out of my GXL and start converting to turbo. But I love the NA and always will. Plus my GXL setup might suprise some of you stock turbo guys. I know I have suprised a few myself.

 

Have both. I am tryin to get a TII, then in the spring, get my N/A rebuilt and get all the body work done and have a sick handler (n/a) and an *** kickin straight line car (TII). I agree w/ banzai, concentrate on handling w/ the n/a. That is what the car was designed for. TII are for speed.

 

https://www.rx7club.com/forum/showth...hreadid=101970

I believe that with a 100 MPH trap speed, 13.7 is VERY possible!!

 

WTF are you all babbling about? No N/A has ever or WILL EVER go into the 15's. 16.5 stock S4 and 16.0 sec stock S5.

But they are stupid N/A and can never be faster than 16.7. They will get eaten by SOHC civic with no Vtec. Sell and get a FD.













.

 

Dude, why are you so upset? Becasue a kid who drives momy cars is calling BS on your kills? RELAX, play their game, and move on.

my .02

 

K, if you couldn't tell, i was being scarcastic there.

With all the N/A bashing and hating going on, it's good to see people still consider these "RX-7's."

I have done many mods to my N/A and *judging from the cars I beat,* I am in the high 14's, definately low 15's.

It is definately possible and it'll still be very streetable. I still have my A/C and P/S .

Here are the mods and money:

Freshly rebuilt stock engine w/perfect compression ($1600)
K&N intake ($60)
PaceSetter Headers ($175)
Anti-Cat (cheap-free)
Working 6-ports/VDI (free)
About 100 lbs. wieght reduction (free)
TB secondary plates removed (free)
Matchport upper intake plenum-UIM (free)
Ported UIM (free)
Ported LIM (free)
New plugs/wires/O2 sensor/tune up ($50-70)
Synthetic performance tranny fluid ($20)
Run premix for insurance (free)
Injectors Cleaned ($20)
Driver skill ($PRICELESS)

..Future planned mods....
-Pineapple racing 6-port sleeves ($50)
-N/A Aluminim hood (Varies)
-Tokico 5-way shocks ($134/ea through www.mazdamotorsports.com)



Basically, get your car running perfectly so that it CAN preform it's stock numbers (15.84-16.5). THEN go for the mods and take those times down drastically. You can have a streetable, fast, reliable N/A w/o spending obscene amounts of money. Just look at mine, Power everything, sunroof, power steergin, A/C, auto-adj suspension etc... Go auto-Xing with your 7. You WILL dominate in the corners (that's what it's made for) and you'll be racing other N/A cars in your class. Not to mention every now and then when a 'quick' car revs at you on the street you can spank him good or AT LEAST make him say "Damn, that little thing is a lot quicker than I thought, surprised he kept up so well!"

I'd say i'm running around 200bhp or 170-175 RWHP. Not as much torque as the TII but I am like 300 or so lbs. lighter, so it's pretty fast for an N/A.

The only way I can see getting an N/A in the 13's short of N2O is extreme weight reduction and engine porting. But then it will NOT be streetable .

 

I know you where been sarcastic, but why bother?!?

BTW - I am not calling you a liar, but WE need to see either Dyno # or dragstrip numbers. I am sorry, but I am tired of people caliming 14 sec FC's; Keep in mind that I've seen LOTS of FB running low 13's even high 12's. I'm in the same boat (as you).............trust me wothout hard evidence is hard to say that the FC is a mid 15 car.

 

my 85 gsl with a bridged ported 12a on a racing beat intake manifold holley 650 with exhaust header does 13.8 why cant second gens do it...ive seen many 2nd gens runnin low 14's high 13's on street ports and holleys...but some people just stick to F.I.

 

are you wanting this thing to be streetable also? If so, then you are gonna spend a lot of money to get it how you want it, but if it would be race-only, then you could do some heavy porting and weight reduction and be in the 13s.

 

Yea, once I get my headers and other few little things done, Im taking mine to the track to see what it can do. I'm almost certain I could break into the 14's. Im on stock ports and stock engine, but compressin is perfect and its running very strong. I am planning on running some N20 though, maybe break 13's, or at least very low 14's. For a N/A to hit 13's without Nitrous , it would probably have to have a Bridgeport, or a Hella-streetport with lots of weight reduction. Oh well....Im just playin around with my N/A until I get outta school and can finally afford a FD.....then Ill actually be fast

 

You said the "magical Combination"

- Holley 550-650
- RB intake manifold
- Usual Mods

The lowest I've seen a carbed 2nd gen, was something to the tune of 14.5 (or .4). I still think tha halltec is the way to go.

 

ugh, unfortunately the nearest track is like 4 hours away. But judging from the cars I beat (ie. 300ZX DOHC V6 NA, mid 90's mustang GT's, modded Integra GS-R, hung well w/a MR-2 Turbo (with exhaust)), I'd say I'm AT LEAST in the low 15's. I konw that for a fact.

One day i'll find some method of time a 1/4 mile run. But think of it this way :

----------hp---1/4------
Stock : 160 16.0
headers : 175 15.7
anti-cat : 179 15.65
intake : 182 15.65
weight reduct: 182 15.6
intake porting : 192 15.4
Match porting: 196 15.32
TB mod : 200 15.3
DRIVER SKILL : 200 15.1

see my reasoning here? those are pretty accurate numbers to what others have gotten doing the same mods. Headers are like 10-15% power increase, intake porting does alot. You get like 30hp from those 2 alone. So 200bhp and low 15's is not out of the question.

 

Dude those are benchmark numbers, I would love to see in paper a gain 10hps from a intake manifold porting and 4 hps from TB mod?

Relax, I believe your racing stories, but notthe numbers above!! Sorry!

In fact there are only a handfull of FC NA near or above the 150hp at the wheels.........

 

good to see some guys willin to beef the NA
my ole Timeslips were back in the beginning of the year
1/8 run...10.1 @ 68.8----Intake only
1/4 run...16.0 @86.6-----Intake and Midpipe

 

I have never dynod my car or run a 1/4 mile either, but have pretty much the exact same mods as dre 2000 on my gxl 86. plus i have a rotary pro pak, s-afc, lightened flywheel, and possibly different exhaust system, mine is a true dual setup, much like mazdatrix(copied by local shop). I have talked to a gentleman here in winnipeg who runs rx7 heaven. i believe he has atleast 20+ years experience with rx7's , has 4 (someone else may correct me, ths was few years ago) rx7 race cars, that are raced every weekend at Gimli motorsports park, as well as having probably 90, yes 90, rx7's in various conditions and years in his possesion. He told me that he believed my car had about 200 hp at the flywheel. since then i have ported the manifold and done the tb mod, when i put that in i will see how much power that returns from seat feel, sorry im poor and every cent goes into the car, not dyno time yet. I don't know if dre's breakdown of power increases is 100% accurate, but assuming his engine is good, I personally don't feel that he is too far off. And I am basing that opinion on what i was told by that very experienced mechanic. I am sure if you ask anyone else from manitoba on this forum they will know exactly who i am talking about and they will trust his opinion completely when it comes to these cars.



BTW any winnipegers know if Fred finished the supercharger yet