sublime5254

hey i'm thinking about doing a couple things w/ my 93 fd. i have a 3 in racing beat catback on it already. next i want to get dp, mp, air box and ecu upgrade. i heard that too much exhaust flow can lead to boost creep which could blow the engine... what should i do to prevent this? i have heard that you should port the wastegate??? not sure exactly what that means so can someone explain it to me? also how much does that cost and will it get ride of boost creep for sure? thanks

the_saint

1)Port your wastegates for best results.

You have to remove the turbos to do this. Then it is a matter of getting a drill bit that can grind metal and enlarge the wastegates as much as possible. This is the proper way, it does involve work but it will save you giref in the long run.

If you are mechanically inclined it is feasible.

2) Add some restriction to your exhaust, hi flow cat, more restrictive catback, silencers/restrictors. They will all help. Depending on how efficient your turbos are you will need varying backpressure/restriction. Some people say they don't have problems, others can't control their boost. I suspect it is related to how efficient their turbos are, maybe they have an unregonized boost leak at a certain boost level, but I haven't heard anything conclusive about why some cars have creep and others do not.

3) you need some sort of boost controller, manual or electronic (separate unit or built into an ECU)

4) you must have a boost gauge

5) you need to have a way of adding fuel to your base maps, with more air you need more fuel.

watch out, and enjoy the huge gain in power if done properly.

the_saint

sublime5254

for now i want to leave the boost alone. i plan on getting a boost guage but see no need for boost controller if i don't want to mess w/ it right now. also, unfortunatley i am not much of a mechanic. how much would it cost for a rotary mechanic to port my wastegate?? thanks

the_saint

You will need a boost controller if you have a full exhaust dp/mp/cb.

Depending on how much they charge, the cost will vary. It took a friend and I about 15 minutes of grinding, hmmmm $50-60/hr 15 minutes = 13-15$? I don't know.

But they have to get the turbos out. I am not sure how much it will cost.

the_saint

evot23

iTrader: (17)

you'll need that boost gauge for sure....if anything to help keep the boost at a safe level before you go crazy. Run the car with the mods first. I added a dp,mp catback, smic and my boost would go to 13 only. With the Profec B I can control the creep and run at 12 consistently.

sublime5254

how much boost does a stock fd run?

mr rx

10.5 psi in std kit

:p

sublime5254

how much does a good manual boost controller cost and who makes it?

eurautodave

why would you modify your car if you don't want to increase your boost? i mean that is where all real performance gains come from. right? i personally don't think you should remove your cat unless your not going to drive your car on the street. we all have to breath and rotaries are particularly nasty polluters. go ahead and flame me i can take it.

sublime5254

im not gonna flame ya. i want to mess with the boost. just not right now. i want to learn more about the car before i do anything stupid, and im 16 just bought the fd w/ my money and don't have much left. i just want to do some mods to build up to adjusting the boost. but for now i just want to do stuff to increase air flow and then later i'll work on the boost.

RussFC

"and my boost would go to 13 only. With the Profec B I can control the creep and run at 12 consistently."

Can an electronic boost controller turn the boost down from what your car will naturally flow? I know that a manual boost controller can only increase the boost by delaying the waste gate opening. If electronic units can infact decrease the boost, how do they do it? Do they have a MAP sensor, or tap into the stock sensor? How low can you set the boost? It seems like it would be limited by the wastegate's flow. i.e. the the wastegate would open fully and some point well before normal and no more exhaust could avoid the turbine. At this point, you would probably be overspooling horrendously. It seems to me that the best option is to port your wastegate to hell, and use a manual boost controller if you want to turn the juice back up.

RussFC

sublime5254

i have a racing beat 3 in cat-back right now as my only mod. i think i am going to get an air box very soon. w/ just these two mods would i have to have an ecu chip or would i have any problems w/ boost creep? keep in mind that i still have the stock cat on it and it will prob stay. also, after i install this air box, my next mod will be a dp. will i have any problems like boost creep w/ these 3 mods or will i need ecu chip? thanks and please help

sublime5254

the air box i am thinking about getting is the ARC Super Induction Box RX-7 93-up. and i am prob going to get it used. anyone know anything about this air box? any praises or complaints? is this one a good one for boosting hp and for producing cool air? let me know anything u know about this one.

RavenRx7

yeah man true on the stinker..... my car really lets it off. I have a MD,DP and GT spec exhaust. It does bump up the boost a few psi. 2-3

Wade

iTrader: (1)

You probably won't have boost creep with an intake and catback. As long as you have a cat, you probably won't have boost creep. You should install a boost gauge as soon as possible too.

Wade

Wade

iTrader: (1)

If you want to increase power and at the same time, not make your car more likely to knock and cause engine damage, you should try to get a good shielded or cold-air intake like the M2 or N-tech. The ARC just takes hot air from under the hood, so I wouldn't recommend it. It is also too large to fit withs ome aftermarket intercoolers, so you might end up wanting to get rid of it eventually any way. You should pass on this.

You can make your own effective intake pretty easily and inexpensively (less than $100).

I can't stress enough that unless you want your car to end up broken down (maybe permanently), you should really spend a little money and a lot of time on some maintenance. New vacuum hoses, new water hoses, new thermostat, the fan modification, add a boost gauge, stainless clutch line, etc. If you fail to do these things, chances are your car won't be running for very long. These cars need lots of maintenance and they are getting pretty old by now, failure is just around the corner for most of them.

Wade

kevinmfaust

I think if you keep the stock cat you will not get boost creep. I have the Pettit cold air, M2 large intercooler, Bonez down pipe, and a cat back that is 3" straight through and I dont have a big problem with creep. I do run a Pro Fec B boost controle though. Stock cat.
Kevin

sublime5254

hey wade, how much does this stuff that you listed cost, where can i find them, and how hard is it for install? thanks for the help