Fox T-Bird/Cougar Forums

Technical => Engine Tech => Topic started by: 88XR7 on June 26, 2007, 03:06:39 AM

Title: Which do you think the culprit is?
Post by: 88XR7 on June 26, 2007, 03:06:39 AM
Speed density or open Y-pipe :hick:
Title: Which do you think the culprit is?
Post by: vinnietbird on June 26, 2007, 06:47:30 AM
I doubt it's the Speed Density,but I wouldn't ever run an open Y-Pipe.I'm a full exhaust kind of guy.
Title: Which do you think the culprit is?
Post by: 88XR7 on June 26, 2007, 11:40:10 AM
Quote from: vinnietbird;156912
I doubt it's the Speed Density,but I wouldn't ever run an open Y-Pipe.I'm a full exhaust kind of guy.


I would prefer not to also, but I purchased the car this way.

full exhaust with an X-pipe might be coming soon.
Title: Which do you think the culprit is?
Post by: thunderjet302 on June 26, 2007, 07:24:55 PM
Age+bad tuning:hick:
Title: Which do you think the culprit is?
Post by: 88XR7 on June 26, 2007, 08:16:58 PM
Quote from: thunderjet302;157013
Age+bad tuning:hick:

Speed density = bad tuning:flame:
Title: Which do you think the culprit is?
Post by: thunderjet302 on June 26, 2007, 09:14:51 PM
Quote from: 88XR7;157021
Speed density = bad tuning:flame:


:nono:

My car has a far from stock HO (different heads and cam) and I'm running speed density with NO problems. Speed density will not cause that. Worn out sensors and neglect will.
Title: Which do you think the culprit is?
Post by: vinnietbird on June 26, 2007, 09:17:29 PM
yep,I agree.The Speed density system is good.You just have to make sure you're not trying to get great performance from  parts.
Title: Which do you think the culprit is?
Post by: 88XR7 on June 26, 2007, 09:41:57 PM
Well, I'm not expecting 13's from her.

I agree, she was neglected.

Previous owner told me straight up he beat on her daily.
Title: Which do you think the culprit is?
Post by: TurboCoupe50 on June 26, 2007, 11:10:38 PM
Old Age...
Title: Which do you think the culprit is?
Post by: V8Demon on June 29, 2007, 06:02:26 PM
SD is NOT the white elephant it has been made out to be.  Contrary to popular thinking SD can be worked with and can be used with an aftermarket/bigger cam.  Just check the first chart below. 

The second, of course, is another one I post a lot about different size fuel injectors and how different base pressures affect their flow rates.  That right there is how you use bigger injectors with SD (works with Mass Air too, but you still need the right meter/sample tube that corresponds for the injectors you are using).  It's not uncommon for people to step up to 24's and keep the stock SD computer.  Read more here:  http://www.50tech.com

That all being said, the best thing to do with any setup other than stock would be to custom calibrate the ECU to get the most out of it.  On newer cars (my Mustang, for instance) it's  near mandatory otherwise you see the dreaded check engine light and the ECU goes into limp mode.  Hell my '05 threw a code and went limp mode when I knocked my EGR tube loose from my air intake after cleaning up under the hood getting ready for Carlisle.

 That 1/4" I.D. tube sent both 02 sensors into a tailspin.  Luckily I found my issue very quickly.
Title: Which do you think the culprit is?
Post by: SLEEPER T-BIRD 87 on June 29, 2007, 06:19:13 PM
whats wrong looks normal to me!