myron96

Hey Guys, Have a question for you. I have an 89 convertible, and of course, it looks good, but isnt the fastest. My question is what can i do to improve the performance, other then a TII conversion or bolt on turbo/supercharger. I recently ordered a K and N Filter kit alonf with the cool air inlet cover. Is there any thing else I can do to get better acceleration, power, and anything else you can think of? Oh yea, and if I buy the Bonez racing pipe to I have to do any other modifications to the car. I have heard I should also replace the ECU i think it was? PLease, let me know... Thanks!!!! JOHN

Also, I have a 1985 GSL-SE that I will be parting out, the interior is in excellent condition, the engine is dead, but if any one has any wants, let me know.

Samps

A vert without forced induction or a nice port will never be "FAST." You can make it move preaty good with a full exhaust; with a header, no cats, and some straight through mufflers. This will be loud as hell. BUT! a vert is about 1,000,000,000,000,000,000,000,000,000 times more fun to drive!

Icemark

The racing beat 'vert down pipe, pre-silencer and cat back actually are a better choice than headers and cat back on a 'vert.

Only about 2 HP difference between the header and down pipe, but night an day more livable as far as sound.

The only draw back is that you wouldn't have a main cat and the car can get pretty stinky when you are not moving such as at a light.

But maybe 15 HP more with that and a cool air intake.

Porting and polishing the intake should be worth another 5-10 HP.

And an electric fan and light flywheel will give you more proceived HP.

next step would be NOS or a 13BT conversion (which if you have the money makes the 'vert just about perfect).

vaughnc

10-12 HP with FULL!! exhaust upgrades (convertible specific downpipe (replaces pre-cat), performance main cat, and nice RB or similar catback system.

5-8HP with FULL!! intake upgrade (cold air box, K&N intake, fresh air headlight airscoop).

Of course underdrive pullies, lighter flywheel, etc.. will help.

My 1989 convertible's pretty fast and dynoed 168HP with just a partial exhaust upgrade (ie downpipe & perf cat, HKS mufflers - BUT I have OEM piping and not Racing Beat piping).


I love you THIS much for taking care of me

Prowla RX7

now if i only had the money to spend on my '91 vert
It's a keeper

Rx7Roadster

iTrader: (1)

I cant wait till get my RB header and pinnapple racing sleves on my vert this summer. Its going to be so much fun.

stickgoat

I want a 'vert.

But I want a coupe too....dammit. The choices...

5 stars for this thread though. I was just searching for 'vert performance yesterday and this question seems to come up often. Good post.

grinchy

get a vert. slow 0-60, but open skies all day, every day.
it is a driving experience.

BadBoy

doing something similar with my 90 vert...keep the info rolling! ive already got the wide body kit and full exhaust and springs and shocks also doing some custom interior and a new blue cloth top from robbins. speed is her next conquest! :P

Fred

mazdaspeed

I have a 88 Vert my mods are listed below im not sure what else im going to do but an intake for sure and a good chance of a chip. (any guess where that would put me for horsepower?) after that im thinking thats all i can do really for the $to horsepower ratio maybe some pulleys? Do they make that much of a difference?\

Raymr

I'm hoping to get some more power in my 88 vert. with a Bonez cat, and eliminating the 2 pre-cats. I'm not sure what to expect. The engine seems to have some guts, but acceleration is only average.

BTW, the RP guy I talked to yesterday says that only turbo cars have downpipes, altho people here use that term for both n/a and turbos.

Icemark

racing beat makes a downpipe for the NA vert that hooks right up to the exhaust manifold.

It is not as noisy as a header because the cast iron exhaust manifold deadens a lot of sound that a header just rings.

http://66.216.67.51/product.asp?0=210&1=254&3=293

Raymr

So is there a difference between getting the racing beat downpipe with a hi-flo cat, or the bonez cat which is 1 piece all the way to the manifold? Either way I need the cat for MD emissions.

88 vert

i have a 88 vert i have the RB header,presilencer,and mufflers,K&N air filter,89 ported intakes,RB street strip clutch,electric fan,new injectors,air pump removed,also removed 6ports,nology wires,and a apexi S-AFC to control the fuel probs i started having after installing the 89 intake.I will have it dynoed and tuned for the S-AFC hopefully the 3rd week of the month of may.The exhaust was a biggest improvement i have noticed in both sound and performance.Hope this helps

myron96

Does anyone know if there is a diff. between the bonez racing pipe for the 86-88 vs. the 89-91? Can they both be used on a 89 vert? Whats the difference?!

vaughnc

could just be minor mounting differences or better tuning for the series V engine.

Bambam7

The convertables are fantastic cars- just beatifull... it's so retarded that they weren't offered as aturbo here...
The weight and flex of the vert is such a bad combo for the N/A engine in ANY trim.... sure you can port if, but you have to wind the F%^k out of it (trust me...) while thats fun, it just doesn't appeal to me whn driving a vert by the beach on a nice summer day....
Just put a turbo on it... will cost you a lot less than you think if you take your time and watch for deals- and also- of course- do the work yourlelf.

My cost so far, for intercooler(s) , fuel pump, injectors, manifold, S-AFC, TII exhaust, and turbo- only about 450 bucks US! The main chunk was the 200 for the S-AFC.

I was very fortunate to have the help of some very generous and knoledgable people though.

If I could find a Vert with a blown engine for cheap- I wouldn't hesitate to buy it and swap my engine into it!!
Any have one?? heheh..

88 vert

hey bambam theres one here in V.A. for sale with a motor thats shot the guy wants $1200.00 for it he says it only overheated and has a coolant leak somewhere but it sound scary to me the guy doesnt know what he has.He wouldnt come down on the price so i didnt buy it and i didnt really need it at the time and had my eye on a turbo II.The car is still sitting in the same spot its in decent condition just needs some TLC.email me if anyone interested. djstdp1269@aol.com oh by the way its a 88.

myron96

Well, just an update, I got my cold air headlight cover in, bought it used for 60 bucks on the parts trader, and my k and n cone air intake is supposed to be delivered tomorow, so ill let you know the difference! oh yea, anyone have a race pipe for sale?!