Hi every one im new her and am thinking of replacing my stock turbos (bad oil leek and can only run 8lbs of boost in them) with my set of efini's. im going to put in a V mount, better pulley kit and a power fc to regulate everything. im trying to see what kind of hp i can be expecting. im open to any other options you guys have for me, and any advice would be greatly appreciated.

thanks a lot!

 

Not to be a dick or anything but there is a search button in the top right corner of the page that can help you find almost anything you want to know. most people get quite annoyed by people that do not search before posting on a subject.
Nice car by the way,

Adam G

 

ok, first of all... efini turbos? you mean 99 spec or what, maybe JC Cosmo? only the y-pipe is Efini materials.

8lb of boost... run a search on that, your solenoids aren't functioning or your pills are missing... search for those issues.

i'm giving first post privilege and not saying anything derogatory.

 

Like the others said, it's very unlikely that your 8 lb boost issue will be solved by simply switching turbos. It's usually a boost leak or one of the turbo control components or a loose vacuum line causing that.

How much power - well that depends on many things. Just keep in mind that FD's will blow their engine if your bolt-on mods exceed the fuel supply. A PFC is only as good as its tune, so if you're going to install this stuff yourself and have it tuned, you need your PFC set up to run safely rich until you can get it to a tuner. If you're new to tuning FDs, you need to read what's in the FAQ, especially the thread under "Advice".

You didn't list your mods, so there is no way to estimate power. Check www.zeroglabs.com for a cool RX-7 dyno comparison tool. But remember, the tune makes a huge difference.

Dave

 

Where in VA are you?

 

hey thanks for the quick replies! i am currently using an in take and full greddy exhaust. i am only running 8lbs of boost because i was advised to by rotary performance because my turbos were so bad.(make them last a little longer until i replace them) i plan on having the mods i stated by rotary performance so i was wondering if you guys thought this is a good set up.

 

oh yeah i live in Fairfax Va

 

"full greddy exhaust."

Did they talk to you about porting your wastegate? You should do that to the new ones before installing them, IMO. If by 'full' you mean you have no cats you absolutely should port it.

Dave

 

no mine is a full cat back exhaust, how do you port the wastegate?

 

You use a die grinder and enlarge the hole a bit.

If you just have a cat-back, I wouldn't bother unless you intend install both a downpipe and midpipe in the future. Wastegate porting is mostly for cars with no cats at all in the exhaust.

Dave

 

yeah i replaced the down pipe so do i still have to port the wastegate? do you think my current mods can support the turbo upgrade with the right tuning?

 

Your tuning is fine as long as your boost is at 10psi. You must be sure of this using a boost gauge - bolt-on mods can raise boost. Anything over 11psi on a stock ECU is trouble.

If there is any possibility of installing a midpipe in place of the stock cat, yes port the wastegate. If you might install a high-flow cat in place of the stock cat, you should port it to be safe.

 

If you replaced the downpipe and go with a resonated midpipe then port the wastegate but your going to need a boost controler.

I have a street ported 13b Bret built at RP. I had BNR stage II at (13psi) I put down 325 at the wheels. However I did go through three sets of stock turbos. I may be the wrong guy to talk to about stock turbos since I finally "saw the light" and I have a single turbo now.

Not to make your decision harder, but Bret cant do squat with a PFC. Its been over three years since I had my PFC installed at RP and they still dont have a lap top or the software to tune it. It really doesnt seem like they want to tune any way.

I live close to you , shoot me a PM if you need some help

 

The software just came out, I just got it last week.
https://www.rx7club.com/power-fc-forum-47/us-spec-fc-commander-pro-software-521307/

 

With a downpipe, hi-flow cat and a good tune 340 rwhp is possible at 14psi. You will need all the mods to support the fuel requirements to be safe. Going with the mid pipe will net you 10 more but I wouldn't bother in VA.

That enough power that with a hard launch to take down most factory rockets up to the vipers and new Z06 vette. In other words mid to low 12's @115-120 in the 1/4. You'll need a single to go much faster. Just keep in mind that puts a lot of stress on the drive train and in time without suspension mods things will let go.