I know, I know. "SEARCH NEWB" or something. Heh, I tried searching as best as I could, but kept getting information I didn't quite need. I'm mainly searching for the bare minimum in supporting mods I'm going to need with a 1988 TII streetported. When I get my engine rebuilt, I figured it might as well be ported, since it's going to be opened. Now as for what I have currently....Walbro 255 fuel pump, Fuel Cut, 2.5-3" exhaust, and a cone intake *if that matters*....will I be needing larger secondaries/injectors? Possibly an "EMS" or "piggyback" or something? I hope not for the systems, because I don't know how to work them, and think it would be a huge hassle/problem if I tried to do it...

Anyway, please and thanks

 

well if you plan on doing any more than what you have now it would be a good idea to get 720cc secondaries and an rtek ecu. simple.

 

Thats a good idea but not needed on a street-port.

 

start with a wideband and see where your AFR's are at, then go from there.

 

ya but i like to be on the safe side of things...plus its the base for any serious mods.

 

just got my streetported motor back from banzai and asked chris who works there the same question. i have a 88 t2 also so this would be exact same for you. rtech 1.8, clean 550 primaries get 720 or 850cc secondaries...no larger, rewire your fuel pump hopfully it is the (255 lph walbro) to make sure it is getting steady voltage throughout the power band. should be about 250 for all supporting mods listed above.

 

Are you guys running the stock turbo on those streetports? along with the mods listed above?

 

This is where my expertise REALLY falls out of the water.

You say Rtech 1.8. Is that something I need to plug into my wiring harness, and all that fun jazz? dear god, I can't remember for the life of my what 88TIIs have stock for injectors...what's wrong with me there?! Sometimes I feel like an utter newb. trying my best to get used to this car business, though.

 

Heres the website for Rtek.
http://www.pocketlogger.com/index.php?pid=rtek7
Rather than explain it myself, just read the facts on the site.

 

just get 720 secondarys and an rtek 1.7 . basically you send them your ECU and they chip it. and get a wideband.

 

Wideband. I've asked a few questions, but don't remember getting an answer on it. I see I all about Rtek, and that's pretty freaking awesome...

 

Hmm, can't edit...too much time passed, I suppose...

Anyway, I was trying to locate me some 720cc secondaries, but couldn't find a place that sells them. Google rendered me useless, I'm never touching Ebay, and I searched the parts for sale section, and everything was pretty old that I noticed. I guess, can somebody link me to a site that would have the injectors to sell, or if somebody has some really good condition ones?

 

post you need some in the 2ND and 3RD gen sections, you get a response. send them to get cleaned. the Rtek is a great MOD for the bang for buck theory. and its safer than a fuel cut.
a streetport shoot make that turbo come alive sooner to!
everyone loves quick boost response!!
im assuming you have a boost gauge?

 

If you don't want to buy something like Venom off eBay, go ahead and buy a set of Greddy 720's off the http://RX7store.net, a basic search anywhere should find you the injectors you need. Just try 'greddy 720'. Or go to http://www.injector.com and try and find something from Marren.

But since the only option you have is low impedence injectors (since you run high's from the factory), you will have to a *tiny* bit of modification.

IF using LI injectors on a HI harness, you must splice into the harness, at each injector lead (for a total of 4) 10 ohm/10watt resistors available at radio shack for a couple of bucks. Doesn't matter which wire of the 2 per injector you splice to, polarity isn't an issue here. This bumps the LI resistance up to acceptable load for the ECU to see.

I copied the above from: http://www.rotaryresurrection.com/2n...ctor_info.html


Anymore questions just ask.

 

haha, I have a pretty dominate one.

I've always wondered about the Low Impedence and High Impedence injectors. What do they mean, what do I need, and how can I tell?

 

I hear that low impedance will show around 2-4ohms resistance and high will show maybe around 10-12ohms resistance, off the harness of course. I may not be dead on with the ranges, but they're close. so if your are low or high (also, there's some helpful info on injectors in the FAQ, hopefully they've updated it to show the half year changes), then you can use low or high respectively as drop in replacements. if you have high impedance and you want to use lows you'll have to use resistors in line with them so the ECU operates them properly. there should be some info somewhere in this forum on that (search).

 

So, that would mean I would need to purchase high Imp injectors? Not quite sure what I should be using, stock. I really don't want to do any mods to get it working...working when I put it in would be nice :p

 

for the love of god, do not get Venom injectors. people have bought them and sent them out to be flow tested... some of them were 80 to 100cc's off. basicly venom just takes stock injectors and bores out the holes. but there seems to be no rhyme or reason to how they do it, so none of the injectors are anywhere close to each other in terms of flow rate. suck it up and get some good used injectors and send them out to be cleaned and flow tested, or buy some new ones from RC or greddy. you don't want to cut corners here.

 

you got that right. I'm hoping to get this done right. This car is my baby I will find out the prices for new ones, then if that's just way too much, I'll get some used. I'm just hoping I can save enough money to get this all done at once. I also hope the Rotary Doctor can do the injector flow test/cleaning...so I don't have to do too much running around. I guess let me just make me a nice list of what I need to do so I am sure I got it right.

Ship ECU off to Rtek to get chipped with 1.7
Buy 2 720cc injectors, get them flow tested and cleaned, along with my 550cc primaries.

Do you think it would cost too much more money to get the wastegate ported, I wonder? I figured if the engine is going to be out, might as well do that, for future use if needed....if I don't use it, no loss! :p

 

the greddy injectors are really just denso units, just like our stock ones. they fit in the rail just fine and they flow well.

and make sure you port the wastegate. Engine saver, especially in cold weather when it could spike really badly...

 

I'll definitely check the price of Greddy Injectors. Nobody is complaining about them, as of yet, so that's gotta be a sign

*EDIT* Is this the ones I'm wanting to get? Remember, don't want to do any mods for the High/Low impedance heh.

 

Just realized I never posted a link to the injectors that I was making sure I needed... *Sigh* way to go me!

http://www.rx7store.net/product_p/greddy%20720cc.htm

 

Just wantd to say this thread presents alot of info on getting to the upgrade in HP Im looking for also .

 

CyberPitz,

As suggested, you should get some kind of fuel management. If you want the absolute easiest, an Rtek is good. Rtek 2 is your best bet going that way as it provides some flexability for modifications through tuning.

Glad to see another local FC getting going. You must be spending quite a bit at Rotary Doctor. There are a few of us local who could help you out for free or quite a bit less in the future. Don't expect too big of a streetport, they like the cars to run like stock there. Let me know if you need help with anything after Kyle builds the block for you.

Josh

 

You say Rtek 2, what would be the difference in that and the Rtek 1.7? Would I still ship my ECU off to them to 'chip' it? I'm not really looking for anything big, I don't think I'm going to get this thing REALLY fast, just fast enough.

Now, I planned on letting Kyle do the whole thing for me, the rebuild/streetport/installation of engine and everything. I was hoping he'd be able to clean/flow test my injectors as well. I don't have a garage or any tools to actually work on my car, so that's why I've got that idea. If you have any other insight, please let me know.