NoOne

Hi,

I just bought my wife a 1996 Miata and we were planning on building it for her.

We've wanted to get her a car to go along with my Camaro for a while and she decided on a Miata, tried to talk her into an RX7 but no go.

I've been looking at all the turbo kits and there is one of two things wrong with them. The turbo's are too small, so they give good low end response but are limited to 250-270rwhp range, bigger turbo's fix that but the car is a dog until 4500rpms.

I've sat and looked at turbo's for 3 days now not finding the middle ground I want, around 300-325rwhp, good driveability and a nice broad torque curve.

Then it hit me this morning...sequential turbo's. There seems to be a decent amount of room under the hood for 2 turbo's, I'm just wondering how the sequential system works.

It seems easy to defeat, so hopefully it can be easy to add. I read on how Toyota does it, but its all ECU controlled.

How does Mazda do it? Is there a mechanical equivalent? Is there an independant controller out there, or do you think, and this is a stretch, that I could feed the RX7 ECU power and enough information for at least to operate the system.

It may seem like a long shot, but it does seem like the fix I'm looking for.

Would be a cool project if it could be done.

Or better yet, how about a complete Rotary conversion, that would be very very cool, however I'd be looking for a ready made kit, she saw the downtime I went through with getting the Camaro straightened out os it would have to be a "easy" conversion, suprisingly I've found no info on that either out there.

Thanks for your time

spooledUP7

It's ECU controlled too.

GsrSol

Sounds like it would be way to hard. You maybe able to fit the 13brew into it.

Give www.rx7.com a call, they only deal with rx7's and miatas and can tell you whats logical and whats not.

NoOne

Thanks,

I sent them an email.

I did some more reading on the rotary conversion and it does not sound like a simple job.

Want2race

i would never put sequential turbos on anything! I think its a disaster!!!

I would personally wither call turbonetics and get them to spec a turbo for you. That way you will get your 300hp.... OR get the big one and a blue bottle of nitrious!

Avoid the sequential like its the plague!

NoOne

Any reason why its so bad?

Want2race

i wouldnt say bad. Id say complicated! You will need tons of solinoids and sensors to work out when the actuator rod ( or whatever you are using to transition....)

trust me... Many fd guys go to a big single because its less complicated!!! I would simple get the turbo spec'ed by turbonetics or someone like that.. Maybe abig turbo with a ball bearing ? that should get you going very soon and still make massive top end power!

NoOne

Here is what the person at one of the companys told me.

The small BB turbo in comparison to the big BB turbo. The small one will make 270 at the wheels at its max before its efficiency drops off, the big one will make over 350 if the motor would hold together. At 4000rpm the small turbo is making 80ft lbs more torque than the big one, at 4500rpm the big one is making 50ft lbs more than the small one.

That defines peaky

My only other choise is to increase the displacement as much as possible and move to a larger turbo, increasing displacement will certainly help matters but I don't know how much I have to work with, I think I max out at 2 liters or 2.1.

It was an idea, and I appreciate your comments, complexity is something that I'd rather stay way from, the more complex it is the easier it is for something to go wrong and the harder to fix.

As always, there HAS to be a way to get what I'm looking for, its just a matter of finding it. I left a message for a company making 400rwhp on a Miata, thats beyond what I want but hopefully they will make more of a tuner kit.

Alot of the companies out there make good reliable kits, not all out high powered kits, just a matter of finding the right shop.

Want2race

here are some questions: is it a 1.6 or a 1.8 miata ?

and I would check out the JRSC supercharger! Tons more low end..And with an intercooler and boost upgrade kit you could probably make 300hp rather easily!

Thats personally what i woudl do! But then again im tired of turbo lag and thus i will probably buy a normally aspirated car next!

NoOne

Its a 1.8.

I'm not big on SC'ing, the Camaro is turbo charged, I wanted the Miata turbocharged.

Lag is something you learn to live with. On the Camaro I get boost starting at 2200rpm, and full 10psi at 3100rpm.

From what I understand it builds a little more linear on a smaller motor, that was the idea behind the sequentials.

I know its hard, I'm looking for V8 torque curves without the V8, but the car is also 1300lbs lighter. There is the V8 conversion but that screws up the whole car.

It didn't start as a V8 and should be made into a V8.

Here is the torque curve from my car http://people.mw.mediaone.net/connelle/ericdyno.jpg This was before we turned down the FP and played with it a little to eak out an extra 16hp.

As far as N20, I ran that last year, 4.25 a lb! I went through 2-3 10lb bottles a week, the turbo's have more than paid for themselves over the summer

Another thing is, I'm basing this off of my attempt to turn the numbers and dyno curves I see into what I think the car will feel like without ever driving it....I need to find someone with a turbo Miata around here to take for a spin.

Miss Mazda

There's a fair bit of work getting 300+ out of a miata, especially on a stock motor.
Not many folks have done it, most are in the 220-250 range even with the FM III kits.


I went with a big turbo and I bought my Electromotive from www.vishnuperformance.com.

I have 323rwhp. I make 270lb/ft of torque and have 250lb/ft@3400rpms on a stock motor.

Only recently have I experienced problems with my car, thought I'd fubar'd the motor but it turned out to simply be a timing issue.
The mazda motors are real troopers, and providing you have the correct engine management, properly sized turbo and good manifold these cars are lots of fun.

I am going to assume the company you left a message with is racingmazda.com which is ric stephens. He has a nice kit now on the the market and I'm sure he'd be able to help you. Tell him Jenn say's hi.

E-mail me if you have any specific questions. Sequential is not the way to go IMHO.


Cheers
Jennifer

NoOne

The more and more I've looked at Sequential the more and more it does look like more trouble than its worth.

I've had a couple other tell me to go with Ric.

That is true though, I think engine management and good fuel are almost, if not more important, than the parts you use, stock parts won't last forever but they will last a good time if you take care of them.

BTW, I'm not looking to make 300rwhp on a stock motor, I'd never expect to, I'd like the kit to be able to do it, then once I get ready to do it I just have to turn it up and retune...of course I'll probably turn it up at the start and wait for it to pop

billyrohm

yeah dude, I just put my turbos is parallel yesterday, sweet, much better, no boost drop off or spiking, just a sweet strong boost curve.