Kerebrus

iTrader: (30)

I know it would be easier to do the carb setup and just have blowthru turbo but honestly I'd feel a little more safe with the fuel injection. Honestly with the carb setup all I would need is a turbo plenum carb hat, custom turbo exhaust manifold, upgraded fuel system, locked dizzy, installed and tuned. Unfortunately it's not easy to find a mechanic that knows blowthrough near me, not anymore atleast

PercentSevenC

Now, I've never tried it, but I imagine that the stock S5 turbo ECU is probably not going to work too well on a 6-port motor. Nor would the S5 NA ECU like boost too much. Honestly, I would either A) get the S5 NA ECU and an Rtek, or B) just go MegaSquirt.

MegaSquirt is MAP-based, so no fussing about with airflow meters. Just run a line from a vacuum source to the MegaSquirt and hook up your IAT, CLT, TPS, and EGO sensors, and you're good to go. To keep it simple you can run a locked dizzy rather than trying to control ignition with the MegaSquirt. There are a few guys on here who can help get it tuned, or you can have it professionally done.

If you were to go blow-through, you'll basically need to learn how to tune it yourself. Get yourself a wideband, or at the very least a good narrowband (not one of the crap 10 LED ones, but one of Auto Meter's 20 LED versions), and a bunch of jets and experiment. Just make sure it's rich enough under boost. Robert (680WHP12A) knows his blow-through setups and I'm sure he'd be able to help.

Starfox07

Hmmm I thought megasquirt was MAF? Isn't MAP tuning a bit harder than MAF tuning?

Edit: Looked it up, my mistake.

MaX PoWeR

iTrader: (2)

how much power r u guna see if u stick with the s5 turbo, stock boost BUT using ur carb??

Kerebrus

iTrader: (30)

Probably 220-230.

84stock

iTrader: (5)

You won't gain much more power, jsut driv eability with efi. That sidedraft should work great (especially with functional aux ports). I would stick with what you have and get Robert to turbo it with a stock s4/s5 turbo and he'll modify the carb and lock the dizzy too.

Kerebrus

iTrader: (30)

Gotta find someone else to do it, don't ask

NCross

iTrader: (18)

An EFI non turbo set up will be easy as cake with that engine. Just will require you to buy a lot of little parts. Chizel out all that sealant and find some new injector taps/perches. They can be found on Mazdatrix in the EFI section I believe. Just get on ebay or go to a junk yard and look for...

4 OEM injectors, UIM, dynamic chamber, throttle body, ECU, wiring harness, injector resistor pack, variable resister, atmospheric pressure sensor, intake funnel/elbow, air flow meter.

It's a lot of parts, but you should be able to get out under $200. Or you could just buy a parts car with a blown engine for a few hundred. Take all the needed parts off, part out the rest to re-coup your costs, then recycle the car for $50.

680RWHP12A

nope, wont fit

3rd and final 7

iTrader: (9)

if you wanna go bacl to the og efi let me know i pulled all mine and put an 88 motor w/91 intake, so i have everything that is need.
Corky Bell designed a turbo kit to run on an SE motor with stock fuel injection at i beleive 7lbs of boost. So im sure if you use stock boost from say S4 turbo and and run a raising rate FPR you could be fine lock your dizzy, or get a turbo intake manifold and modify it to fit your 6 port, and run a MS with a locked dizzy have the MS run fuel only, you can always use a CAS. There are so many different options.

edit: i got everything, i think minus the injectors

Kerebrus

iTrader: (30)

Will let you know, just trying to figure everything out.

Crit

iTrader: (6)

By the way, an easy and cheap way to do injector plugs is to buy some 16.4mm freeze plugs from some Geo (Spectrum, I think - doesn't really matter) at AutoZone. They'll fit the bung holes just fine, and you can follow up with a dab of silicone. No need to make or buy anything special. I'll check for the part number.

rotariesrule

if you want cheap and fast go to the junkyard and get a ct-26 turbo off an old supra. then do s draw-thru carb/turbo with a water injection system. it can easily push 300+hp stock, by the way that turbo can be modified make up to 420+ hp. you already have the weber carb to use. turbo also came on mr-2 and celica gt4. you can get these turbos for about $100 at junkyards.

with a draw thru carb set-up the carb does not see boost so no need to modify carb. easy to do and a lot less work.

http://www.suprastore.com/ct26turup.html

http://members.aol.com/mr2mkii/turbo.htm <-----------------guide to check a turbos condition

rotariesrule

the pacific avatar rx-7 convertible had a draw-thru set-up. check it out here https://www.rx7club.com/1st-generation-specific-1979-1985-18/my-new-project-56k-no-way-599907/page14/

Kerebrus

iTrader: (30)

There is a company called R Power about 30 minutes away that have a stock 13b 6 port running a t04b turbo with a stock 1986 rx7 ECU, they did NO tuning to the ECU, only controlled through a boost controller. Used two GSL-SE fuel pumps and Mallory FPR, it's been running great and making about 250hp. I'm gonna go check this car out this weekend and probably do whatever they did. Still gotta find out about their turbo exhaust manifold.

NCross

iTrader: (18)

What do you mean by "nope wont fit"?

twinkletoes

iTrader: (17)

Don't mean to hijack cbz, but I have the same setup as you but with a mikuni 44. What would me or him all need to go blowthru? Just turbo, manifold, exhuast, carb boostprepped, piping to carb, bov, and wastegate?

680RWHP12A

thats what i mean, wont fit.
i hate mis information spread on the forums...
he has a gsl-se motor so stock parts from a turbo 2 WILL NOT FIT ON THIS MOTOR
second if you were referring to using stock SE fuel injection, 2 fuel injectors is all it came with from the factory wich in not enough fuel to run any boost reliably. third maybe you were thinking of using 86-87 n/a fuel injection since it uses 4 injectors, nope that wont fit either, well at least the turbo wont unless you get a custom manifold to clear the intake manifold..

680RWHP12A

yup, you got most of it. the only thing your missing is a EFI style hi-pressure fuel pump(ie msd , walbro, or bosch will all work fine) and a boost refrence style fuel pressure regulator to go with it (ie mallory#4309) and a carb hat, i have those in stock

twinkletoes

iTrader: (17)

Cool, thanks man!

Kerebrus

iTrader: (30)

Well, I'm going out to LA today with a buddy to check out a car at a shop called R-Power. They have a stock 13B 6 port motor in a GSL-SE that is running a t04b turbo, two SE fuel pumps, mallory FPR, intercooler and it's runs great making about 250hp they said. I'm not sure what they did for the manifold but they said it wasn't really an expensive setup at all and they've had this running for about 6 months now. Also, they are using the stock S4 ECU! They said they did not tune it at all, just slapped on and used it, they controlling with a boost controller.

NCross

iTrader: (18)

Actually I was stating none of the above. I thought he said he was thinking of going back to NA EFI on his 13b as an option. I was just telling him it is very easy to remove the carburetor and return the motor back to stock EFI using the appropriate model and year parts.

His primary injector holes are filled with some sort of sealant. I was telling him he may need to buy new injector perches or whatever the technical term is for the little brass looking pieces that sit down in the holes.

He said "I may just convert it back to EFI or even turbo it" in his second post. I wouldn't just throw bad information out there. I was not aware that the FB 13b did not come with secondary injectors.

Kerebrus

iTrader: (30)

Correct, I do plan to return back to EFI and once that's all stable and running, look into my options for turbo. Still trying to get everything situated on what exactly I need to go back to EFI so that I can have everything on hand and ready when I do the switch.

Starfox07

What does locking the dizzy mean, and what does it do? Just curious.

680RWHP12A

i rest my case
there is no such thing as injector perches, there is no brass thing that sits down in the hole
and the fact you were unaware SE's disnt come with secondary injectors make any of your information invalid for this thread