2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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Old 07-21-05, 05:04 PM
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Mods/Upgrades

I got a stock 88 RX7, NA convertible, was wondering what are some things i can do for more performance, horesepower, etc. New to this as some of you may already new from prior posts. Keep in mind that i'm only 19, and just a sophmore in college, hehe so money is limited. Suggestions are open, or links to other Rx7 urls that give good information on what i could do to help.....I wanna beat some hondas!!!! lol, ni'm tired of seeing them everywhere i go.
Old 07-21-05, 05:19 PM
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turbo 2 engine/drivetrain swap. best bang for buck (unless you want to go into the realm of v8's)
Old 07-21-05, 05:23 PM
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turbo2 is definitely best bang for buck if you're aiming high, but if you really like sticking with your N/A or your goal isn't that high, check out the "beefy NA" thread in the 2nd gen. archive
Old 07-21-05, 05:29 PM
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Originally Posted by NOPR
turbo 2 engine/drivetrain swap. best bang for buck (unless you want to go into the realm of v8's)
He said money is limited, so I doubt that this is an option.

Truthfully though, your power mod options are fairly limited, especially with a naturally aspirated model.

You could always go the Intake/Header/Exhaust route for a little extra power. If you can source some underdrive pulleys that's a route to go. Also (I haven't seen these in a while though), if you can find Dual Alternator Pulleys - that's good for a few more as well.

I'm pretty new to RX-7's and am just pulling on knowledge gained from a friend a few years ago, so take everything I say with a grain of salt.
Old 07-21-05, 05:36 PM
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lol I was going to say that isn't a conver. but heres are some sites, for a vert i would just rebuild engine, port the **** out of it, new exhaust, standalone or piggyback depending on your funds, clutch, weight reduction, new radiator, upgrade oil cooler, take off emissions. I can think of more but just to lazy.

www.a-spectuning.com
www.atkinsonracing.com
www.racingbeat.com
www.gothamracing.com
Old 07-21-05, 06:00 PM
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Originally Posted by gingenhagen
turbo2 is definitely best bang for buck if you're aiming high, but if you really like sticking with your N/A or your goal isn't that high, check out the "beefy NA" thread in the 2nd gen. archive
To save other readers some time:
How to make a beefy N/A? Need your recommendations!
Old 07-21-05, 06:17 PM
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Thank you for the help!
Old 07-21-05, 07:18 PM
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mazdaspeed7
Times, dont know yet. Low 14's, im sure. I raced a 300Z TT with intake 0-100, and lost by a car and a half, and I was dealing with timing problems then. Just a few days ago I had a little run with a 96 or so Cobra, 90-125 or so. I was behind him, but he did not pull an inch on me, and towards the top of 4th, I started inching closer to him.

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
Add to mazdaspeed7's Reputation Report Bad Post
was wondering if anyone could explain a few of these mods to me.....


timing advanced
coilovers
Crane Hi-6
TII fuel pump and 550 cc secondaries
UD pulleys, main and alternator
TB mod
and what the heck he took off to get his Rx7 at 2600 pounds.


and one more thing, is removing the p/s worth it?, cuz it will be my everyday car as well as a race car....the gray GXL i am giviing to my lil brother.
Old 07-21-05, 07:40 PM
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Originally Posted by Musada
mazdaspeed7


was wondering if anyone could explain a few of these mods to me.....


timing advanced
coilovers
Crane Hi-6
TII fuel pump and 550 cc secondaries
UD pulleys, main and alternator
TB mod
and what the heck he took off to get his Rx7 at 2600 pounds.


and one more thing, is removing the p/s worth it?, cuz it will be my everyday car as well as a race car....the gray GXL i am giviing to my lil brother.
timing advanced = closer to Maximum brake torque timing which = more efficiency/power
coilovers = fully adjustable suspension
Crane HI-6 = CDI (Capacitative Discharge Ignition) which gives a stronger spark
T2 fuel pump and 550cc secondaries = more fuel which is required if your car starts pushing much more horsepower than stock
UD pulleys = underdrive pulleys, which slow down accessories, which frees up more power for the car
TB mod = removes secondary throttle plates, which trades low end for top end power

for weight reduction, pretty much remove everything you can find, haha. Some of it is sound dampening stuff, spare tire, tools, etc.

as for removing power steering, it supposedly puts you more in touch and more in control. But not having power steering really sucks when you're parking or anything at low speeds. Once you're up to speed, not having ps isn't so bad.
Old 07-22-05, 09:25 AM
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Sorry, but you got one of the slowest FC's ever built.
Some of those Hondas are quick.
It'll be a royal waste of time trying to chase them down.

Since you don't have the money, just enjoy ride.
It takes a $30k Honda to match your convertible.


-Ted
Old 07-22-05, 10:50 AM
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Originally Posted by gingenhagen
T2 fuel pump and 550cc secondaries = more fuel which is required if your car starts pushing much more horsepower than stock
Not necessarily true...you'd have to be pushing CONSIDERABLY more power than stock to necessitate a TII fuel pump OR 550cc secondaries. Power is often made on N/As by leaning your car out, even with mods.

That said, Musada - I would go with the usual intake and full exhaust for a little more power. You can also buy a piggyback fuel controller like an S-AFC or e-manage and have it professionally tuned. Verts aren't known for their speed due to their excessive weight and lack of turbo (unless you do an engine swap).
Old 07-22-05, 11:41 AM
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Something that hasn't been mentioned is the '88 vert has a 3.90 open diff. Replacing the 3.90 diff. with a 4.10 LSD is a consideralbe improvement.
Old 07-23-05, 10:57 AM
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Well maybe i shouldn't give my lil brother my old GXL, lol...and build it instead....nah i wanna look pretty ad fast, so i'll stick to the vert
Old 07-23-05, 08:22 PM
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Originally Posted by jpd3253
Something that hasn't been mentioned is the '88 vert has a 3.90 open diff. Replacing the 3.90 diff. with a 4.10 LSD is a consideralbe improvement.
That comes from someone who's actually done it, so he knows the difference.

With a limited budget and daily driver status, you're restricted in what you can do. Focus on easy bolt on stuff - exhaust, lightweight flywheel, suspension, etc. It'll make the car a little peppier and fun to drive.
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