Maaaaadchoochoo

So todays mission is finding correct injector size for the 88 rx7 with 1.3 with a turbo and where i should buy them thinking the ones on it are to big running supper rich ( i know this is a problem with these motors) any suggestions has the stock turbo 2 turbo but n/a motor

warpig

I cant really help you with your question but how good is the NA 13b holding up because im deciding if i want to turbo my NA and chance it.

Maaaaadchoochoo

Its holding up pretty good i only bought it 2 weeks ago and trying to fix everything this previous owner did half *** but if you do it correctly the first time should be good motor runs fine and its pretty quick with stock turbo from the turbo 2

Sudowoodo

iTrader: (1)

What are you using to tune the engine? What are your AFRs at, if you have a wideband? The fact that it is rich, doesn't mean your injectors are too big. It means that it needs a tune.

Maaaaadchoochoo

I dont have a tuner atm that is the next step for this car what is the tuner i should get for it? And dont know the afr atm

Sudowoodo

iTrader: (1)

Okay. You need an ECU to tune the car, and you need a wideband so you can actually know if it is running too lean or too rich. You can buy an Rtek 2.1, which is basically a chipped stock ECU that provides basic tuning capability. You can also go with a Megasquirt, which is a DIY type ECU that can have the nice functions of something like a new Haltech. Or, you go with a new ecu like Haltech or AEM. An Rtek is the only one that you won't HAVE to make a wiring harness for. Other ECUs you can sometimes buy a patch harness for, but just take the time to make a new wiring harness to replace the old and brittle 30 year old one.

I currently run an Rtek on my car, and it's okay. I'm going to be upgrading to a Megasquirt, the MS3X, pretty soon since it has much better tuning capabilities. I'll also be making a new harness as well. Aaron Cake has written an amazing write up for installing a Megasquirt in an RX7. Here's the link: How To Megasquirt Your 2nd Gen RX-7

Maaaaadchoochoo

Thanks a lot and how much does the rtek usually run for?

Sudowoodo

iTrader: (1)

You can send your ECU in and have it done for about $600 I think. I'd suggest the Megasquirt. It'll only cost you a couple hundred more. By the way, don't go into boost with your car until you tune it.

Maaaaadchoochoo

oh yeah trust me its been siiting in the garage taken apart so i can put new stuff in it and learn these cars lol only driven it once that was when i bought it to bring it home

Maaaaadchoochoo

But it does need new injectors still those old ones are gone still no info on injector size stock?

Sudowoodo

iTrader: (1)

Good to hear you're not driving it like this haha. Stock T2 injectors are 550cc. If you want to bump the boost up some on the stock turbo I'd recommend 550 primary and 720 secondary, or 720 all around.

Maaaaadchoochoo

Sweet thanks any good website to buy 550cc injectors there are absolutely none in colorado springs

Sudowoodo

iTrader: (1)

I bought some RC injectors off of Ebay a few months ago. I'm running 750cc and 1200cc injectors from them. You could also find some used stock ones and have them cleaned and flow matched if you only want 550cc.