cruiser

If I put these 2 mods on my stock FD, will I already need an ECU upgrade or will the stock ECU be able to handle it ? (I will also have boos gauge and Koyo radiator installed).
Somewhere I read that Y-pipe alone brings boost up by 1psi and I guess the DP does the same and as far as I read, 12psi on stock ECU is bad news...

So what do you think ? Anyone with similar setup ?
I will be getting PFC later this year.

Thanks,
Tadej

cruiser

Accidentally ckicked twice. sorry, moderator please remove this thread.

Mahjik

iTrader: (1)

You should be ok, but some people have noted an extra pound of boost after changing to the Efini Y-Pipe. Some people didn't an increase at all. Ever car is different.

In the least, you might think about doing the Home Depot boost controller just in case.

cruiser

How is this home made boost controller ? I mean, does it also control the spikes ? How do you go around setting the wanted boost level then ? Do you just driver around and gradually open up that screw ?

cavellm

I had an efini y pipe and hi flow cat on mine, nothing else and I was spiking to 13 psi on my primary constantly on WOT. 2ndary was fine at 10 psi almost all the way till redline.

But like Mahjik said, each car is different...

ejmack1

if your turbo's are good, that more than likely you will spike... if bad, than dont worry about it... I would just buy a dawesdevice.com boost controller... You cant beat it for the money!

adam c

iTrader: (2)

I did similar mods, and you have it correct. About 12 psi. I suggest you install the boost gauge before you do the downpipe and y-pipe. Do the downpipe and y-pipe at the same time, it wiil save you some work. Also install a manual boost controller at the same time.

http://www.rx7turboturbo.com/robrobi...controller.htm

I don't reccommend installing the prespool controller unless you need to.

Adam

Marshall

Wouldn't gaining a pound of boost downstream of the turbo outlet on the inlet side of the motor indicate more of a restriction?

adam c

iTrader: (2)

I'm not sure I understand what you are getting at??

Boost is measured at the manifold, and has to be controlled regardless of where any restriction lies.

turbojeff

iTrader: (30)

Like everybody else said. You might get boost spikes, not a good thing.

You don't really need to get a dawes device or anything similar. Go to the parts store, buy a Holley carb jet that is smaller than .068". Drill that sucker out to about .073" (or buy one that size), remove the stock "pill" in the WG line and install the Holley jet that will probably eliminate the boost spike. If your boost is to low after that then you need a smaller one. To high you need a bigger one. This is a little bit of a PIA guessing and checking.

The good thing is that you won't have some other crap in your engine bay. It is totally invisible to the competition, etc.

You don't need an ECU upgrade.

Jeff
DP
CB
Efini y-pipe
Stock ECU

Stage 3 stuff waiting to be installed

cruiser

Bah, I don't know how this small part is called in Europe and I need a fuel and or boost controller anyway. Is PFS PMC any good at controlling boost - i.e. can you limit the boost say to 10 or 12psi ? (while speaking, how much psi can the purple PFS PMC handle ?)

Thanks for the help guys !

2-Rotor

2-Rotor

Jeff,

I am looking to run the same setup you have there. How many miles have you ran your car with that setup??
I am still debating on whether the stock ECU can handle the extra boost given the saftey parameters have been decreased. Will that waste gate pill be enough to control the boost creep.

Thanks Marc