All the mazda's are 160, except for the turbo, right? And, why wouldn't I buy a TurboII? I mean like, some people say they have short lives, and expensive to repair. Is 200hp worth the trade off for that? Please correct me if I'm wrong. thanks

 

NA 86-88 146hp
89-92 160hp

TII 86-88 182hp
89-92 200hp

Like any turbo car, it will be less reliable, more expensive to upgrade, and a HELL OF ALOT FUNNER.

I say go for the turbo.

 

The turbo model has a lot more room for upgrades as well... you can make big hp.

Its supposedly a lot harder for the N/A 7's to see a big increase in hp and most will never see over 200hp.

 

What about series 5's?

 

What about the series 5. Thier 89-91. Hard to get over 200 with the N/A but can be done with a mild streetport and full intake , exaust and tunning. The turbos start at 200 for series 5 but the torque along exceeds the N/As.
Once u start modding the turbo it will walk a modded NA
but it takes more than just intake and exaust. So when u spend 1000 bucks for intake and exaust on your turbo dont come craying back here because I beat u in my N/A

 

The max you can get from an N/A is 250HP. How do I know this? Mazda spent big $$ on R&D for the Renesis engine, and that's what they got.. (wooo,wooo)

 

Oops, I'm from the South, that's (Yeee,Haaa)

 

it IS NOT hard to get over 200hp in an N/a, despite what everyone says. all it takes is an S5 setup with full exhaust & intake, big intake & exhaust ports, lightened flywheel and thats about it. you can hit 200 fairly easy that way. hitting 250 is harder and would require a bridge port and race bearings to hit the high rpms. 300 is possible with a good peripheral port, but that is the limit and cars like that arent streetable. yeah you can have a periph port street car but not with 300 rwhp.

the advantages of turbo are that you can reach over 300 with only bolt-ons and power is basically endless if you have the $$$$

Justin

 

High compression engines make big HP. Thus 250HP from the 13B-RENESIS/REVOLVE engine..

 

That $1000 is going to make a much bigger difference to a Turbo than a NA, and I'm not just talking RX-7's. Turbos (any turbo car) will always return more power for your dollar, always have, always will. If you beat a Turbo with $1000 of mods, the only thing crying will be your wallet.

 

I've owned two NA's...actually 3 including my 1st gen. and a TII. I'd never trade my TII for an N/A. I only have a downpipe and main cat replacement pipe and it will out accelerate a Mustang GT (believe me I Know). The N/As were fun but don't compare to the TIIs.

TOdd

 

Stock t11s are 14.8 1/4...Go to the times thread. Most t11 with intake and exaust run low 14s. 14.3 or slightly lower. I have seen modded N/As get 14.3 without streetport. Thats where i get my observations from. Most peoples lightly modded n/a are *** slow I understand. I like turbos better to but I just dont want one right now and my point was that I can or will still be able to beat him. Dont go turning this into some gay, I have turbo and I like it better war. Stop here.

 

You're the one starting the gay war. I have less than a grand in my car and you don't stand a chance.

 

Interesting point, but remember RX-7s can make a lot more power by putting a (generally louder) intake and exhaust on them. Mazda got 250 HP N/A with a stock setup. It can make more, but it will be louder.

 

Thanks, so what is better for an everyday driver?

keep in mind, i want it to go when i tell it..

 

I agree, Felix.

and $1000 could KILL a fully modded N/A:
-$40 intake
-$400 for full exhaust
-$350 S-AFC
-$60: used 680 cc injectors
-$30 manual boost controller
$880 for 10 psi and 13's...
add some weight reduction, intake porting, and TB mod, fuel pump rewire...
find me a streetable NA that I couldn't walk all over with that...
Sean Cathcart

 

Lightened flywheel will not get more horsepower. Dyno will read it as extra hp, but the engine isn't making any extra power.
And I am yet to see an street ported NA give me 200 hp to the wheels...
Sean

 

true, but when it comes down to it, a lightened flywheel will put more HP to the ground. unless we are talking about flywheel hp which i didnt think we were

Justin

 

What does the Flywheel do? I think it has something to do with the transmission..but not sure.

 

a lightened flywheel reduces the rotating mass, thus reducing the loss of power through the drivetrain.

lamens terms. it makes the engine drive less stuff before the wheels

Justin

 

watch my n/a push 270 with a street port..ill keep ya posted....

https://www.rx7club.com/forum/showth...threadid=65695

 

You can't it an NA if you're going to throw a supercharger on it...


-Ted

 

Dude, please tell me that you were joking in this post. You can't possibly be that ignorant and own a 7 - it's just not possible...

Mazda actually got 280 hp out of the renesis, in "street trim", and then detuned it for emissions and torque. 280 in street trim.

In any case, it's a moot point, since you're comparing two totally different types of engines - one, a peripheral-port exhaust engine with several degrees of overlap and 9-11 lb rotors, the other a side exhaust port engine with 2-3 degrees of dwell and 6 lb rotors, the latter also having the advantage of the latest computer technology.

Fact is, nobody's ever spent the money to go full-built streetported engine w/ a standalone. A fellow on the old TeamFC3S list put a Wolf 3D on his car, IIRC, and gained a WHOLE LOT of hp. It's just a matter of actually finding someone who's done it. I am of the opinion that if someone build a streetported engine, put a good i/h/e combo on it, and went standalone, they could make 200 hp to the wheels with ease.

Just my $0.02

Brandon