I am in the midst of installing 99 Efini twins, i was hoping somone with this setup could help me out. I am thinking of running 17psi, but not sure how long my brand new reman w/ 3mm apex seals and street port will last. I don't wanna blow my motor in 15k. Any advice would be appreciated. Thanks in advance

 

Anyone?

 

did rx7.com build your motor? They are building mine right now and I have 99twins and Chris Ott will be tuning mine at 17psi. Chris said I will be fine, actually he came up with the 17psi number. I think he has the same set-up on his car and made close to 385rwhp at 17psi and the 99 twins.

 

Yes, I have been going to them for years now, Chris is very knowledgeable, He has the same setup on his car. He told me 17, but that seems a little high, i don't want to be visiting him again for another reman in 12 months ypu know, 5k ouch.

 

You live all the way in Minn, did you sent him your motor or make the trek?

 

If he says 17 psi is ok, I would trust that it is. He wouldnt say it if he thought it was too high. Chris has always been very honest with me and would never steer me in a direction that was going to blow my engine. Proper tuning is obviously very important, I would definately have him tune the car for that boost level. I know they offer a 12month/12k mile warranty on their engines, he wouldnt jeopardize that if he didnt think it was safe. I am sure 17psi is harder on the turbos but is no problem for the engine. There 3mm engines see a lot of single turbos running much more boost than 17psi, its all in the tuning. You could blow your engine at 5psi, if it were tuned really bad!

 

I sent him my engine.
They normally dont send there motors out, but Chris knows me very well. He helped me through my motor project this winter and trusts what I am doing. Plus, after I get the motor back in the car, I will be making the trip to TX to have him tune it.

 

Valid point, he told me that he would take me for a ride in his car so i can feel the power that i am about to have, he is going to be dyno-tuning mine once i break her in, which will take me forever. It is beginning to get hotter than hell here in Tejas, so i usually let her rest. I am anxious though to break it in and get it tuned so i can start smokin others.

 

When you come to Texas to have him tune it we should hook up and go for a cruise. I would love to see another 7 w/ the same set-up for comparison reasons. I hope that they both just as fast, enter driver advantage.

 

tell him you talked to the "duck" from MN. Not sure how I got that nickname, I think there receptionist, "Mary" gave it to me. I should get the motor back in a couple of weeks, which will put me in TX in about a month. Mid to late May.

 

I will have to ask him about that "Duck" nickname. I am actually going to call him tomorrow to see how we are progressing. E-mail me @ rcs0034@unt.edu when you are on your way to TX, we'll go out for a ride in the lame ace concrete jungle that is Dallas and the surrounding "Metroplex".

Ryan

 

As long as the fuel is being delivered I dont see your engine beinga problem. You will however seriously shorten the life expectancy of those twins running 17psi.
I run 15 on my 99's and they are starting to shown signs shaft play now. I installed them in 99 brand new outta the box
I only started running 15psi last summer, before that I ran 12psi. I rebuilt and ported hence the new boost levels.

 

There is a huge thread that covers most of my project over the last year. Its under "my project pics" Otherwise someone on the forum used my car as the feature car of the month on their web-site. (www.drivinhard.com) I think its still there, I have not checked in a while.

Do you live far from RP

 

I live about a good 45 minutes from them, but it's all HWY driving so not bad. I love taking the 7 on the George Bush turnpike, lots of fun, no cops. Everything here is so spread out so 45min is really not far. A 45min trip to the best 7 shop in the country is a minor inconvience.

 

What other mods do you have? What injectors? I have basically every mod needed to be safe. I am running 850cc primary and secondary injectors, which according to the fuel calculator is good for close to 410 rwhp at 85% duty cycle.
17 psi will definately shorten the life of the turbos as opposed to running 12, but I dont really care because I probably only put 5000 miles a year on my car anyway. Its not a daily driver and we have snow on the ground for 4-6 months out of the year. So even if they only last me 25k, thats 5 years for me, hell I will be looking for a different set-up by then anyhow.

 

I would suggest getting a 2 bar map sensor. That way if you ever "boost spike" over 17psi, the computer will still be able to read the boost level and give the engine enough fuel to keep it from popping.(well, at least until you hit the max duty cycle on your injector set-up) I think the "stock" map sensor will only read boost levels up to 18psi, so anything over that the computer wont see and in return wont add any more fuel. Lean condition=bad

 

I only drive mine about 4k a year, so if my twins last 5 years I will be thoroughly pleased. I also have 850cc in the primary and secondary. I have a Fluidyne rad,billet ast,Greddy airinx,dp,mp,Greddy cb,Greddy pully kit,Greddy FMIC(soon), Efini Y pipe(a must),new NGK9 plugs,NGK wires,FC1000 Ignition amplifier by Jacobs,ACT streetlite flywheel,PFC,RP fuel pump,new fuel filter,relocated batt(behind pass seat),silicon vaccum hoses, Greddy tt,STOCK clutch, we'll see how long that holds up. I had a Bonez street comp, POS, it only lasted 23k. Never again will i use their products.I will hopefully be putting on a new suspension and brake kit soon, along w/ boost and temp gauge.

 

The Bonez clutch is actually an ACT clutch. Bonez is just a name that RP uses, its not really a brand name. I have the Bonez clutch from RP and it is actually stamped with the ACT logo. ACT is a very good clutch, you may have just had bad luck.

 

Why does RP do that? When I had the ACT/Bonez clutch my car was mostly stock, stock boost at least, the plates were paper thin when I took it apart!

 

How long have you had your clutch on? Mileage wise

 

I have had mine for maybe 50 miles in this car, but I had an ACT in my previous FD and never had any problems. It could just be your type of driving, not saying you drive hard. I know I do, thats why I bought this car and did all the mods.
You may want to check your clutch pedal "free-play". If not adjusted correctly it could be dragging, which will wear your clutch disk down really fast.

Who installed the clutch?

 

I do drive hard, if you are not driving an FD hard why in the hell do you own one then? No disrespect to people that drive it otherwise. My friend who is a master-tech at Mazda South in Austin,Tx installed it when I lived down there. I did buy it from RP though, not that it really matters.

 

Whether they are the original "series-6" turbo's from 92-95 or the latest 280PS version from the "series-8", 99-02.

You should only go for 14psi if you want some type of reliability. Sure, 17psi will make the engine go harder but the turbo's will fail pretty quickly at levels such as this.

Even at 14psi, get the "series-8" MAP sensor as they are the 2-bar style. Your original "series-6" type is only a 1-bar unit.

REgards