ive been reading these forums for a while and ive noticed no one mentioned how to modify a 13b and not decrease its gas milage ,because we all know how good of a gas mileage they get(15-18 mpg). my question is how can i modify my 1987 gxl without sacryficing gas mileage andhave it fast enough to beat those over rated acura integras that pull 14s or high 13s?i like integras but its like everywhere i look everyone has one i want to be that kid that has the only oldschool rx7 that can whooop they ****!!

 

If you can't afford the gas, you aren't going to be able to afford to get an N/A into the 13's....

 

so which mods will expose my car to more speed but will sacrifice my mileage?what mods do u ppl have and whats ur mileage estimation?

 

Turbo and/or nitrous, and a stand alone ECU with two maps (sport & cruise).

AND- weight reduction.

 

Well, the thing is you have a specific goal (14's, high 13's), that's not very easy to get to with an N/A. Figure the following

Header & full exhaust
Intake that actually has a cold air inlet
Some porting of some kind (on the engine, which means a rebuild)
ported intakes & tb
ditch the cats/etc
decent clutch/lightweight FW (every little bit helps)
toss some of the weight from inside the vehicle
SAFC or similar and some tuning time

 

I like Rat's approach, more finesse.

 

how do u think these upgrades will come out to be approximentaly?and what are u guys pullin in the numbers?

 

i havent seen a cold air inlet for a this model where can i get one?

 

Cost wise? Who knows...

SAFC is ~200
rebuild w/porting is probably ~1400
clutch ~250-350
flywheel $250-450
decent intake w/box - $100 (with K&N filter)
full RB exhaust (w/header) - $800-1000?

And then comes plugs, plug wires, some decent tires, probably new suspension, and so forth.

All for roughly ~180-190rwhp....

 

and its not the fact of affording the gas but if (id rather have an rx7 because its different from what everyone else runs) a piston car will give me the same results for less money and the parts are more well known y invest in a car that will end up hurting me in the long run

 

That's a very good question, and one not many people seem to ask themselves. Yes, the rx7's are unique and cool, but they're not overly fast (n/a), or cheap to make fast. There's just a massive cult following that doesn't seem to care what it costs or how broke they go, so they just pour more and more into them. I mean if you want a unique car that's pretty zippy and handles OK, but aren't too concerned with beating everybody in a straight line, you'll be fine with the basic upgrades (exhaust, intake, safc, suspension, etc), but if you're planning on being able to beat a lot of those Integra's or other vehicles that run mid/low 14's, it's going to be costly.

 

You answered your own question.

 

Good point Hermit, that's one of the reasons we have such a cult following, because it's so different and unique, but it sucks that for some reason it's a bit misrepresented, and some people dive in and find it just ain't for them. Sometimes people just need a reality check, then if they decide it's for them, wooo and on with the mods, just so long as they have a realistic idea.

 

thanx sonic rat that exactly the kind of answer i was looking for can the turbo 2nd generation rx7 give me what im looking for ?

 

Yeah, the TII is SO much easier to get into the low 14's (just exhaust, fuel pump, fcd, and a MBC oughta do it). It's a bit harsher on the MPG though, but if it's in good condition and you keep your foot off the pedal, there should be no reason not to see 18+

 

kool im on th search for a t11 tnax for da help fellas

 

Guess he's lucky I'm late. My "sons" 90 FC3C gets about 12-13 mpg , while its parked. The car was purchased for mileage, competative racing, or modifications. It was bought for love.

I love my son, and when finally gets his license, he's gonna LOVE driving with top down, and his occupants , also. These cars are in a class by themselves, and from owning one for six months, money don't mean squat.

Cause I don't have any left from improving the car, and I dont give a SQUAT. The sure power, and rush, is worth the 10-11-12 mpg. And the girls are nice also.

I'd invest in # 6, Viagra, if I needed to beat someone that bad. And that is a good investment, cause at least on it, when you get beat, you keep going, and going, and going, and going.......

If you got the funds, modify the crap out of it. But for me, when its all said and done, win or lose, IT IS AMAZING TO SEE THE LOOK ON THEIR FACES, WHEN YOU POP THE HOOD, AND THERE ARE NOT ANY MODS.

Won several, lost a couple, but the looks ::::: PRICELESS.

3.00 bucks a gallon, and satisfaction, win or lose, I'll leave mine( sons) alone.

PEACE THE DOG

 

is it not true that any u[grade that allows and engine to flow better (intake, exhaust, porting) will improve gas mileage only if the OUTPUT POWER IS THE SAME AS BEFORE

the thing is most people who have that additional power available will use it, thus decreasing gas mileage

 

The problem with most power increasing mods is that people *use* them. It takes gas to make power.

A free flowing exhaust, free flowing intake, standalone, etc. will all tend to increase fuel economy at a given power output. However, you get more power with them, and tend to use it, so fuel economy suffers.

There are a scattered few people around the forum pushing 30-35mpg highway with their turbo '7s. The cars are heavily modded, have full standalones for tuning, and push down 300 or so to the wheels. The tuning is well done, and they can get the economy IF THEY STAY OUT OF THE GAS PEDAL. That's the key.

-=Russ=-

 

holy **** 30-35 mpg thats better than...than....than walking! that sounds too good to be true if u ask me. mombodogs i think ur obsessed over these cars . u talk about having no more money just to drive the dam thing u need help. how does a stand alone help the gas mileage

 

Proper tuning. I believe scathcart is seeing 30+mpg on a regular basis.

However, the tuning needed to accomplish this is considered by some to be hard on the engine. The exhaust gas temperatures are VERY high, and the ignition is pretty far advanced. It's much more precise than the stock ECU can ever hope to achieve, and would most likely cause catalytic converters to melt and drain out the tailpipes.

-=Russ=-

 

I got 26 mpg (highway) before I got the Microtech. It's easy....just keep your right foot in check.
-John

 

so its not worth try to modify a s4 unless its turbo?

 

Pretty much, unless you just want a daily driver that's kind of zippy and handles well, if you're expecting to beat a bunch of people, it ain't gonna happen.

 

thanx ill think twice about buyin this gxl