I was wondering if it would be possible to have a street port and 4 850's along with aftermarket exhaust, air intake and a boost controller, yet no haltech, PFC, ect. ?. would it be possible to get it to run safely(no boom)?

 

No, because the stock ecu couldn't compensate for the 850 primaries.

why!?

 

would it be possible to hold off on the injectors? or would the modifications still be too much for the ECU?. I can't get a PFC right now, so I'm trying to find a way to get it driveable without wasting money on a piggyback system.

 

don't be a lazy/stingy owner.

where in lancaster?

 

Yes, i did for a few weeks. If you don't have a boost gauge get one. intake & exhaust is often a recipe for boost creep and your stock ecu will *not* compensate for it.

I wouldn't try to extract any fun out of the car until you have stand-alone. -That is to say don't be stupid. The car isn't going to spontaneously explode but it's not prepared for your mods. The PFC was my greatest bang for the buck improvement. I imagine other computers are similar.

EDIT: You don't have a midpipe do you?

 

I figure I have to baby it for the first 500 miles anyway(new port job). I Had a T2 done up the same before and went the S-AFC way. I don't want to go that route this time. I figure by the time I do the 500 miles I will be able to get a PFC installed and tuned. I'm just trying to find out if it is possible to drive it like it is till the seals are seated.

 

I'm in East Petersburg

 

It's possible, without the 850cc primaries. it's very much so not advisable though. As well, if you have the engine out right now, it'd be a real pain in the *** to install the injectors after the motor's been put back in.

do it right, do it once.

where's East Petersburg? I've heard of it, but can't place where that is exactly. I'm in Mohnton.

 

Wow, seriously errant advice in this thread. There is no reason to need larger injectors with that setup whatsoever. Just run the stock injectors and a boost controller to keep boost at 10 psi. Do NOT run a midpipe.

If you're planning on a full exhaust later, then you should port the wastegate while the engine's out.

 

So you're saying that at 10PSI, with stock injectors, aftermarket intake and exhaust, and a street port, the car will be fine to boost with stock ECU? I've never heard anyone say that before.

I also didn't comment on his large primaries, because he didn't ask if they were too much for the setup he has.

Of course, I'm no mechanic, I just know what I learn from the forum and people I meet on the forum(basically tons of people to contradict one another)

 

Here's a link discussing it:

https://www.rx7club.com/3rd-gen-archives-73/stock-ecu-10-psi-myth-308996/

I don't know if Wade's site is still up, but there was testing done to show that the stock ECU could support bolt-on mods at 10 PSI.

 

bolt on mods are one thing, a street port is not a bolt on. I think it's probably more important to know how agressive the sp is...

 

CFM is CFM regardless of how you get it. However, since the stock ECU cannot change it's programming, the idle will usually be a little lumpier (and probably raise up a bit from stock rpm idling levels). M2 and Pettit ECU's handle stock and street ported motors with the same maps just fine.

 

It's been said before and proven. Hell, with a cat, most of the benefits of a streetport aren't even realized anyway. I personally wouldn't run a streetport on the stock ecu because of drivability but it should be plenty safe from a timing/AFR standpoint.

 

it's right outside of Lancaster city, right before manheim.

 

I've already have a straight exhaust, besides the resonator. I'm thinking that the injectors can wait. Thanks for the advice.

 

I'm in manheim every weekend.

 

straight exhaust as in no cat?

 

Rynberg and mahjik are right. Just make sure boost levels stay right at 10psi and you should be fine those few mods. I dont know how many more mods i would throw on till you got a different ecu.

 

BAD move..put a cat back on there.

 

Maybe we can go rip up the town together when I get the car back(I've had it for a little over a year, yet it has sat on jacks or KD rotary most of that time)