Hey guys, like I mentioned earlier I just traded my n/a rx7 for an original 87 TII. And my mods are 60 trim turbo, 60 mm wastegate, XS Power manifold, 3" turbo back, 650 injectors, MBC, boost gauge, and a/f gauge (not wideband, i wish though). Anyway, my spool up time SUCKS!!! I hate the turbo lag. I want faster spool up time, any ideas? I probably hit FULL Boost around 4.5k rpms, maybe even 5k. But I cant complain once it hits that power.. LOL! I am running about 15 lbs right now. I thought about porting the turbo, but would that help out any? I just want faster spool up time?????

 

Porting a Turbo? someone explain.

Sounds to me like the only thing you can really do is get yourself a streetport.

 

porting the turbo??? is this a external wastegate? if so there is no "porting" the turbo. im thinking the only way to get faster spooling time is an electronic boost controller and different "hotside" of the turbo. whats the intake like going to the turbo?? they help out to. if its stock make a custom TID and youll get faster spooling.

 

I didnt know you couldnt port it. Sorry about that.

How much would a streetport typically run?

It is external wastegate. Whats the difference between the electronic boost controller and the manual boost controller?

Where can I get that hotside? What kind of hotside should I get?

I have a solid pipe connected to the turbo. Along with the MAF.

 

Picture of my motor. If that helps out any...

 

first of all. exactly what kind of turbo and what size is the hotside??

the EBC "so ive heard" can somehow make quicker spooling time. how much more? i have no idea as i yet to try mine out.

a streetport requires a fresh rebuild of your motor.

 

The turbo is a 60 trim, which I believe is also known as a T4 turbo. I have no idea what size is the hotside.

What exactly does the EBC do to make it spool up faster? Whats the difference between that and the MBC? Does the EBC have special features? LOL!

 

Well, you don't really have to "guess" with an EBC. I've heard it's also more precise, but meh.

 

An EBC will certainly help. But running that turbo on the stock intercooler and stock ECU is a disaster waiting to happen. If you bring the boost in earlier, you'll likely run too lean and be picking apex seals out of the exhaust.

That's not even close to enough injector for that turbo.

 

that big 90 degree bend in your intake wont help any

 

Options:
-Port work
-Smaller exhaust housing
-more efficeint manifold design thats fully divided along with the turbine housing
-ball bearing center cartridge (ie. replace the turbo)
-Standalone (will allow you to optimize your timing, and lean out the ramp-up area slightly reducing lag)
-more effcient intercooler (the colder/more dense the air, the quicker the power hits)
-electronic boost controller
-larger freer flowing exhaust system/downpipe

probably more but thats the biggies

 

So:
1. Get that 90 degree bend out of the way, and make it more straight?

2. What about a FMIC instead of the stock intercooler?

3. ECU? Are you saying that, that turbo is too big for the ECU to handle?

4. What size injectors do you recommend? Wouldnt the SAFC help out any?

5. Why did you say the stock ecu and intercooler is a disaster waiting to happen? Could I upgrade my ECU some how?

 

1. not until you get your fueling taken care of
2. that would be good, less heat soak
3. the ecu will give you enough and retard timing for stock turbo/boost so yes
4.720cc all around might cut it, 1000cc secondaries would make more sense
5. you're probably going to kill you car unless you read up and change some things in a hurry. if you're running anything above 9psi the ecu doesn't retard timing any further, it certainly doesn't add enough fuel (your small injectors don't help). too much timing+ not enough fuel + too much boost + too hot of intake air from top mount ic= a blown engine

 

So this is what I should do:

1. Get an SAFC

2. Would the FMIC increase spool up time? I have a FMIC, just need piping. LOL!

3. Tune it? Can you upgrade the ECu in my car? Is that possible?

 

/thread

 

get all that ghetto *** piping out of there

 

1- No sense getting a SAFC if you don't have bigger injectors to dial up to match the bigger turbo.

2- No, but it will add some HP maybe, and lower temps (once again maybe)

3- refer to 1, yes, if it's an 88, get a rtek 1.7!

it should be:

1- GET BIGGER INJECTORS NOW!!!!

2- get a rtek 1.7

3- get an ebc (necessary with rtek?)

4- tune it

5- FMIC

6- DEAL WITH THE FACT THAT LARGER TURBOS TAKE LONGER TO SPOOL!!!!
(this is why the FDs' and Cosmo's have dual sequentials)

 

Really that is such a minor detail it's not even worth mentioning at this point.

Yep.

Yep. You'll want to look at a full standalone such as the Haltech or Microtech.

The cheapest and easiest config is 720CC primary, 1600CC secondary. You probably won't need all that fuel so 1200CC secondary will work fine but you'll pay more vs. the 1600CC injectors that are common.

S-AFC won't help. You're well out of it's capabilities.

The stock ECU will not be able to fuel the engine appropriately. The only reason it has not blown up so far is because the stock ECU runs it PIG RICH in boost and you're seeing higher fuel pressure with the pump. If you start increasing the boost down low I almost guarantee that the engine will blow at approximately 4,000 RPM the first time you hit the gas.

There are no upgrades for the stock ECU. You are also way out of the capabilities of the RTek "upgrade" as well.

 

Wow, holy crap! Someone sold you an eBay special ticking time bomb!



If I were you I would not even drive the car in that current state. You need a REAL engine management system for that turbo. SAFC's are a waste of money in this department, as they are only piggybacks with limited control. Find a local tuner and find out what engine management system they are most familiar with, haltech, microtech, etc. Then make your decision based on what your tuner is most familiar with.

EBC's are able to modulate the wastegate so that boost builds quicker. MBC's cannot do this.

60mm is a really big wastegate, you do not need something so huge for your setup. That right there in combination with the MBC is probably what is creating the majority of your lag.

Get a FMIC or VMIC setup, that stock intercooler can't cool down the air that that turbo will push.

 

HOLY CRAP! I didnt think it was this bad. LOL! Yeah, the guy that had it before me, had that piping made at an exhaust shop, I believe.

But what if I were to keep those injectors? Right now, I am running 15psi and even when I floor it, it stays rich.

Well, for my situation right now, what would you guys recommend? I dont have that much money right. So I guess, it would be to turn down the boost???

 

^Turn down the boost and start saving some money for the supporting mods.

15psi through that turbo is more air flow than 15 psi through the stock turbo. The stock ECU doesn't know what to do over 9psi(I think) with a stock turbo, so your probably pushing your luck.

 

Turn down the boost. If you actually get into the efficiency band of that turbo (somewhere above 15 PSI, apparently.... ) the engine will pop.

Then start saving $3000 or so for a set of larger injectors, standalone, FMIC, and tuning.

 

well, at least he's got the proper wastegate to run low boost pressure

 

hahahahaha, thanks guys. Appreciate the info. There goes my fun

 

Trust me, its way better to have the fun cut down than to have a blown motor.