beqa16v

what about rising boost only during tough races? for example i have to race somebody on a 1/4 mile and i have only reliability mods and boost set at 10psi by electronic boost conroller. can i rise my boost to 11-11.5 temporarly for couple of races and than put it back at 10? will the engine suffer hard because of this?

BlowenByTwins

iTrader: (6)

you wont gain much by only increasing boost by 1-1.5psi
but yea u could go to 11psi with out harm to your motor

beqa16v

ok, how much can i increase boost for 1 or 2 races withought damadging my motor?

BlowenByTwins

iTrader: (6)

whats your fuel setup and ignition like?

Mahjik

iTrader: (1)

If you are still using the stock ECU and/or the stock intercooler, no.

BlowenByTwins

iTrader: (6)

true, but a PFC and at least a SMIC would be done as reliability mods

beqa16v

when i said reliability mods, i ment intercooler as well and stock fuel system

DaveW

As long as you keep your boost low enough so you don't get fuel cut (see the attached table), you should be OK. I am assuming that you still have the stock ECU.

Mahjik

iTrader: (1)

"Reliability mods" means something different to everyone. IMO, a PFC is "not" a reliability mod and neither is a SMIC so I would not assume he has either.

Mahjik

iTrader: (1)

List the mods which you have on your car (aside from body kits or suspension).

BlowenByTwins

iTrader: (6)

keep your boost were it is if u want to increase it then get a new intercooler and a Power FC

Montego

iTrader: (1)

You are thinking this completely wrong. If you DON'T blow your engine then upping the boost won't hurt it. Key word IF YOU DON"T BLOW your engine .

Even though Dave is right... I believe that upping the boost on a stock ECU is the one of the dumbest things anyone could ever do. Stick to 10 psi. If you currently you can't afford to play (upgraded ECU, fuel) then you certainly can't afford to pay (blown engine $5000). Be smart about what you do to your ride and it will certainly pay off in the long run. My first engine went at 108K miles and my second went at 52K miles (my car was modded). The only reson I blew my second engine is because my wastegate line came off (non rotary related) and I over boosted to 23 psi. If I hadn't had that **** poor luck that engine would still be alive and runing today.



How is a PFC and a SMIC reliability mods? I had no idea that the stock units where prone to fail.

beqa16v

i dont have any, i dont have RX7 at all. im looking for it in japan. so im thinkin forward. for example if i had custom cold air intake with K&N drop in filter, SMIC, downpipe, muffler/catback, boost controller.

Mahjik

iTrader: (1)

To increase boost over stock levels, you need some sort of fuel management (i.e ECU upgrade). Once you have that, you can do what you are inquiring about. Many people will set their boost controllers up for a High and Low setting. You end up with something like:

High - 14 PSI
Low - 10 PSI
Off - 7 PSI

JWteknix

iTrader: (2)

wow lol

beqa16v

yes i know, i was just asking if its possible withought tuning fuel. because in my country there is no single place where one can tune the engine, there are no tuners here

CantGoStraight

You could run into some problems if running the stock ECU....but then it's not your motor is it ?

CantGoStraight

These aren't reliability mods. They are done when performance increases are done, and these items are for that.

BlowenByTwins

iTrader: (6)

then no dont increase your boost

and i look at the aftermarket intercooler as a reliability mod cuz the stock core is really small and inadequete for hard use

and the stock ecu is fine but it is very limiting so if u want to expand beyond stock levels, get a new ecu

Montego

iTrader: (1)

oh dude come on! you don't even have an Rx-7!!!!??? So let me get this straight: you are asking if you can up the boost for a couple of runs on a FICTIONAL vehicle? **** me....



Mahjik,

You are a patient man to say the least. You are the definition of Zen my good man.

beqa16v

[QUOTE=montego;7216022]oh dude come on! you don't even have an Rx-7!!!!??? So let me get this straight: you are asking if you can up the boost for a couple of runs on a FICTIONAL vehicle? **** me....

somebody tell me whats wrong with this guy?
im not increasing boost, instead of making conclusions about it watching Tokyo drift like some kids do, im trying to research as much as possible on FD before i buy it.
I thought it was good to ask when you dont know.

Mahjik

iTrader: (1)

Once you have a car, if you go the route of using a PFC there are maps you can load and use. Basically, you find one which is close to your setup and go from there. There are knowledgeable people here on the forum who can help you fine tune it for higher boost for your car. It's not ideal, but it would be a way for you to run higher boost settings.

It is not advisable to run higher boost setting without the proper fuel management. There are also re-chipped stock ECU out there. Many tuners in Japan sell them as well as still a few here in the USA,


Thanks as always.

Montego

iTrader: (1)

oh there is nothing wrong with gathering knowledge I commend you for that. But seriously you completely layed out a scenario where you were going to up the boost a couple of pounds on a stock car and DO a few runs in the 1/4... As it turns out you do not even have an RX-7! Excuse me for saying this but this is something I'd expect from a 16 year old. Are you 16 or anywhere close to that? GDHF...

To answer your fictional problem regarding not having someone to tune an aftermarket ECU for the FD. Get a pettit ECU, they come preprogrammed with sufficient fuel for 13 psi on stock twins.

M-

beqa16v

thanks for advice
but i didnt say i had a car, i said for example. maybe it sounded like i had one because english is not my native language and i didnt express something correctly but anyway your post is kinda impolite if you ask me.

Monkman33

iTrader: (28)

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/do-i-need-remap-ecu-when-i-install-new-downpipe-catback-exhaust-677560/

you also posted the same question here.

I understand doing you're research before buying an RX7, but many aspects of this question have been answered numerous times before.

Read over the FAQ's. These will give you anything and everything you ever needed to know about RX7s. I promise! I read them before I bought mine.. and I have found plenty of that knowledge to be useful...