Are you sure your boost gauge is showing the right boost ?

I made 250rwhp at 260tq at 12psi with my mods.

 

That's what I'm wondering too. Hooking it up and running the PFC as is I thought could be enough, considering you're attempting to keep the stock map consistent.

It'd be another story if you wanted more PSI and didn't want to run lean/rich or something...no?

The FD I am getting has a Hi-Flow Main Cat, if I were to get a DP, it'd have similiar effects as a MP/DP no?

I'm considering PFC before DP, or restoring main cat and just DP (kind of silly to do that though...)...

 

Let me just say that is not completely unusual. Another member on here made similiar numbers at 8 psi, with a similiar setup. It was hard to believe but not completely unbelievable. Everyones engine reacts differently as well yadayada.

 

DONT DO IT MAN

 

Damn, now I'm tempted to go back to stock ECU, lol

 

why dont you spend your money on H.O.P........

 

from what I have read and researched the stock ecu is built well there are limits too the map set on the stock ecu. Although some people say no dont do it I am one to actually let the stock ecu have a chance if you will. The first and foremost thing to do is to limit the boost to a 10psi level. Also a purchase of a wideband or a cheapo AFR guage will be helpful to make sure you are not leaning out.. Dont hit over 10psi and dont run that bad boy lean and it will work out just fine...The fuel system has to be at its best running status though to make sure enough fuel is coming in.Good luck!

 

When I ran the pettit ecu with the exact same setup it read right at 1 bar and would spike a little past that on cold nights. So I am fairly sure it is correct.

 

Here's that other member I was talking about, just for ***** and giggles who made close to 300hp, on 8 psi.

8 psi ***** and giggles

 

my car is a 93 auto,if i going to put down,mid,and cat back,what happen if i run with the stock ecu?

 

my car is a 93 auto,if i going to put down,mid,and cat back,what happen if i run with the stock ecu?

 

would this be ok if I have a boost controller set to push below 10lbs and have dp and mp installed on stock ecu? I understand the only concern is over boosting and leaning out from it but if you have a boost controller this shouldn't be a problem should it?

 

I read a thread posted a while back by adam c, aka cheap bastard king, the write up was about if it was okay running 10lbs on a stock ecu. The problem is that its not necessarily the pounds of boost that changes but rather the new and increased cfm rate flowing into the intake charge. So the 10lbs of boost on a stock fd, is not the same as 10lbs of boost on a modified fd. And that is why you get more power.

From my understanding the problem is that in order to control boost you have to have a restriction in the exhaust, otherwise the turbos are free to spool as fast as they please. The boost controller with free flowing exhaust is not enough to controll boost. With a boost controller and a midpipe it still makes it difficult to controll the boost, especially at the "boost spiking, when secondary comes online". The best way is to add a boost conroller and a restriction plate, or a cat even a high flow, lets just say its extra insurance. Otherwise your playing blackjack and hopefully you don't bust.

 

thanks.do i also need boost cut conroller?

 

i put down 251rwhp @ 8lbs with intake downpipe and catback. your car isnt running right. you should have more HP then torque. mine was 236tq.

AFR was flatlined on 10 (or lower, 10 was the lowest reading)

 

I ran a stock ecu for about 6 months with fmic, catback, mp, dp, intake, greddy elbow, (almost every bolt-on) and had no problems. I looped my vaccum line so I would not see more than 8lbs. of boost. Also if you get a air/fuel monitor like my innovate system, you can make sure you will be safe.

 

I measured that on MAHA LPS dyno (similar to Mustang I think, some say it shows even lower numbers). I also ran 13.4sec 1/4 mile at 106mph. So about 270rwhp would be about right. But still too damn low for my mods

I hope that high-flow muffler and ignition amp will solve that for me