Got it. So from all these replies, KEEP IT AT 10psi and all should be good. and should probably get a wideband af to make sure.
So the 12 psi is that the maximum that the turbos can handle then if tuned? Or if tuned and supporting mods are done, injectors and such, how much psi can I boost on the stockers?

TpCpLaYa, dammm! Good job with having a FD when you were just 16!!! I would have felt hella cool driving one to high school!! I got one @ late 16 too but it was wrecked (thats all I could afford) and I didn't get it running til I was 18. Happy for you!
And wow, 550 for pfc is REALLY cheap! but it just sold.. haha and i cant even afford that atm. will have to wait.

 

"So the 12 psi is that the maximum that the turbos can handle then if tuned? Or if tuned and supporting mods are done, injectors and such, how much psi can I boost on the stockers?"

With all supporting mods, it depends on how long you want the stockers to last lol. tom94rx7 managed over 400hp with over 20psi (nonsequential), but I'm pretty sure he blew the turbos in short order. General consensus that I have seen is between 14psi and 15psi to get the turbos to last a long time.

 

there are two issues here and both have been pretty much covered.

you can easily run what you have BUT you are on very thin ice. you have fuel for 290 RWHP and you have air for close to 400.

as long as you respect your fuel limitations you will be fine. the upgraded ports will make it more difficult.

given you are on a budget ATM i would suggest you keep an eye on the classifieds for a secondary fuel rail and a couple of 1600 injectors. FullFunctionEng has recently introduced a new fuel rail system and the Bosch EV 14 fuel injector has similarly reshuffled the hard parts deck. both of these items have added additional older generation sale items in the Classifieds section.

older rails and injectors work just fine as would a used good condition Power FC... a huge value around $600.

make yourself a wish list or a mod path and start assembling your gear.

BTW, it never ends. i started in 99 and am still having fun uprating my FD. you do need to enjoy the journey and the FD is worth the effort.

good luck,

howard

 

Words to live by when owning a FD. It will NEVER be a cakewalk owning this car. There will be problems, things will break, the car will strand you.....you will bleed, cry,....ok I think I'm getting a little carried away.

Point is....owning an FD becomes an experience and at those times when the car is running flawlessly and you have a gorgeous day tearing up back road twisties there is little in this relative price-range that will give SO MUCH more back by way of the driving experience!

 

I will say that I didn't just start liking FDs and then went out to buy one. I think I did AT LEAST 1 1/2 if not 2 YEARS of straight research here and on the other forums. I let a handful of FDs come and go before I was comfortable purchasing. Bought a one way ticket and drove my FD ~3hrs on it's maiden voyage home. It was FAR from being a GEM but in my price range and came with the peace of mind of having a brand new engine. Some pics can be seen here:

https://www.rx7club.com/members/tpcp...batmobile-654/

FYI, my car only boosted 5 psi for the first YEAR I owned it. I could CARE LESS and was just amazed to be able to drive the car and get used to it. One I fixed the boost problem (new turbos) now operating at the stock 10 psi, the car felt like a completely different animal which kept the experience always slightly changing and improving.....this allows the driving experience to constantly be evolved which keeps things fresh.

I was TERRIFIED driving my first one too (way before I bought mine)! After hearing all the horror stories and seeing all the people who have crashed them I was scared....that slowly subsided and turned into a CRAVING to drive and own one.

I would say two of the most important things that allowed me to own an FD (@ 16!) and continue to own the same car 10+ years late (same motor) was self control.

I will say it again....SELF CONTROL.

Knowing WHEN to beat on it, Knowing HOW....overall just respecting the car in general.

I can say with confidence that out of my close group of friends in Highschool....lets just say 10 people.....8 of them would have totaled the car, no doubt!

I would say its almost like owning an explosive, people see you with it and want to see it blow up. You are already the man for having it but there's a time and a place to let it explode and people will think you are the ultimate in cool if you blow it off in front of a crowd, however, it takes more self control then one would think to pass on the opportunity and walk away.....letting down a lot of people in the process....but ultimately living to see another day.

 

/\ forgot the other important thing lol:

Being mechanically inclined!!! If you are not VERY comfortable working with tools and on automotive systems then I would recommend have VERY deep pockets.

 

Maturity. That's what RX-7 drivers need, regardless of their actual age. It's a turbo-boosted, RWD sports car that wasn't intended to be driven by youngsters (particularly given its list price when new). You need enough maturity to drive and fix it safely and reliably, but not enough to drive slowly on quiet country roads and on the track.

This year, the RX-7 was 6th in Pro Class and 3rd in Open Class at the World Time Attack Challenge: FEATURE – 2012 WTAC PRO CLASS WRAPUP : 7Tune.com. Video:
The RX-7 is a modern classic, from FB to FD. Yes, it's finicky and sometimes expensive to run, but does anybody know of a sports car at this performance level that isn't? With new, relatively "efficient" cars like the Corvettes and Porsches (which I respect), you take a hit on the purchase price and insurance. If you're serious about owning them, you don't drive them in the winter, which means you have another car as a daily driver.

A well-modified RX-7 can run with the exotics. In my opinion, the FD compares favorably in looks against Ferraris and Aston Martins. Its prettier than the curvy Viper, which is related, with its double bubble roof and long hood, short tail design. Yes, it doesn't have a prancing stallion on its hood, but a clean RX-7 is light, fast, and beautiful.

 

Yes check it with a wide band be sure. Do you have any idea on how large the street port is?

No it is not.

 

Just my opinion. 10psi is too much. You are pushing more air with the ported turbos, the pumps have **** fuel in them right now (winter season) and your ported. I say 8psi max. But try 10psi and let us know how it goes.

 

I wouldn't run your mods at 10PSI with the stock ECU. You may still be at 10PSI, but you'd be moving a hell of a lot more air than running 10psi without mods.

Is your waste gate ported? That would help you to maintain low boost levels.

 

Other than the mild streetport what other mods are you referring to?

 

Back in the day wade did a bunch of tests and logged on the AFR's of the stock ECU. The link where he stored that data is now broken and thus I can't link you all to it. But in essence he proved that the stock ECU ran plenty rich to support all bolt ons at 10 PSI.

In any case, this will have to do:

http://autos.groups.yahoo.com/group/rx7/message/108689

https://www.rx7club.com/3rd-gen-arch...i-myth-308996/

 

I was wondering the same thing. I'm pretty much in the same situation as you , OP

 

THe OP states that his turbos are ported. So its possible they are moving more air at 10psi than compared a set of stock unmolested turbos at the same boost.

 

Im sure he means ported wastegates. I doubt porting of the compressor housings would accomplish much of anything at 10psi. Either way, keep the damn car at 10psi or less on the stock ECU. Hell, buy a used pettit for $300 on the forum if you want a little more boost, no more than 12-13psi.

 

I agree about the wastegate. I still dont think you can run 10 psi safely with a ported motor. We dont even know how big the porting is.