• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-

Not Sure To Be Excited Or Worried

  • Thread starter Thread starter rattlecan96gt
  • Start date Start date Jul 20, 2017

rattlecan96gt

Active Member
Dec 22, 2016
106
8
28
Dallas, Texas
Jul 20, 2017
#1
  • Jul 20, 2017
  • #1
Well awhile ago I had a friend of mines shop help me finish my engine swap on my 96 gt with an 02 pi engine, because my apartment wasn't very pleased lmao but any who the shop told me this engine has a cam when they started it I was excited but when I picked it up and installed the exhaust it didn't really sound or feel like it has a cam so I kind of disregarded that allegation, but fast forward to a week ago I said raise hail praise dale and deleted the mufflers now I don't have cats or mufflers I just thought eh why not you know but to my dismay it definitely appears to have a cam it seems now that the car is louder I can really hear a cam lope I checked vacuum new plugs new wires the whole nine yards I checked and cleaned the iac and scanned the obd and came up with nothing but the results of a healthy PI 4.6 2v any ideas ? should I be concerned of anything?
 

rattlecan96gt

Active Member
Dec 22, 2016
106
8
28
Dallas, Texas
Jul 20, 2017
#2
  • Jul 20, 2017
  • #2
yes all engines have a camshaft ill just get that out of the way lol
 
Reactions: robertsa

RaggedGT

Been here over a DECADE and still no CT
Mod Dude
Jul 20, 2014
4,739
3,188
203
Taylorsville ky
Jul 20, 2017
#3
  • Jul 20, 2017
  • #3
That particular engine has two of 'em.. lol
Other than partial deafness and some fumes I wouldn't think there'd be any problems
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
43,075
21,263
234
Box behind Walmart
Jul 21, 2017
#4
  • Jul 21, 2017
  • #4
I stopped after the second line of the first sentence. There's only one sentence.
 
Reactions: RaggedGT

rattlecan96gt

Active Member
Dec 22, 2016
106
8
28
Dallas, Texas
Jul 21, 2017
#5
  • Jul 21, 2017
  • #5
RaggedGT said:
That particular engine has two of 'em.. lol
Other than partial deafness and some fumes I wouldn't think there'd be any problems
Click to expand...
thanks for the actual input. now I see why people don't ask for help.
 
Reactions: robertsa

robertsa

Well-Known Member
Apr 22, 2017
159
44
58
San Antonio
Jul 21, 2017
#6
  • Jul 21, 2017
  • #6
My suggestion would be to pop a valve cover and look for identification markings. Take a picture and post them up if you find something.
 

RaggedGT

Been here over a DECADE and still no CT
Mod Dude
Jul 20, 2014
4,739
3,188
203
Taylorsville ky
Jul 21, 2017
#7
  • Jul 21, 2017
  • #7
rattlecan96gt said:
thanks for the actual input. now I see why people don't ask for help.
Click to expand...
My bad man, I thought I gave actual input. Let me reword it without any jokes..You unrestricted the exhaust. It runs better. No I don't think there's a problem. If it's not setting any lights I'd drive on
 

rattlecan96gt

Active Member
Dec 22, 2016
106
8
28
Dallas, Texas
Jul 21, 2017
#8
  • Jul 21, 2017
  • #8
NO NO NO lol your good bro you misunderstood me lol you gave great input I appreciate it lol.
I was talking about noobz, hes a smart guy he can really help a lot but sometimes I've noticed he just likes to troll instead.
 
Reactions: RaggedGT

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
43,075
21,263
234
Box behind Walmart
Jul 21, 2017
#9
  • Jul 21, 2017
  • #9
rattlecan96gt said:
NO NO NO lol your good bro you misunderstood me lol you gave great input I appreciate it lol.
I was talking about noobz, hes a smart guy he can really help a lot but sometimes I've noticed he just likes to troll instead.
Click to expand...


I troll a LOT. There are a ton of folks here with a lot more Mustang knowledge than I have and I defer to those experts quite a bit.

If the technical piece within a thread is solid then sure... I'll make jokes unless it's a technical thread in the technical forum to keep it moving or to bump it up. Otherwise, it's chit-chat. Technical threads are those that ask for or deliver a set of step-by-step instructions for accomplishing a task. Threads that ask for opinion, are not.

Everything done on this forum is of course, done in written word. The clearer it is, the better it is. If it's a mess, I will usually comment about the mess. I'm dammed if I do and damned if I don't try and keep it "light" or "troll" as you call it. I'm a smart-ass if I make light of it or a prick if I state it bluntly.

Anyway, I will convey my message in a way that I think it will be understood. I'm not too concerned about butt-hurtedness. That would be a full-time job and has little to do with forum operation. Many folks actively seek reasons to be butt-hurt.

Look at my post count. Now, how many posts do you think I read in a given day, month, year (rhetorical)? I don't even know... Nearly all of them.

You appear to have some smarts yourself. At least you are here asking questions and not bookface. Work on your written delivery and your posts will get more traffic and better responses.

Ok... if there's sarcasm in that post, I don't see it.
 

squeak93

15 Year Member
Jun 2, 2005
2,276
367
164
Joplin, Missouri
Jul 21, 2017
#10
  • Jul 21, 2017
  • #10
Lack of back pressure can actually hurt performance. I'd strongly reccommend putting mufflers back on. These cars already suffer from lack of torque.

Also most cams (Aftermarket) are marked on the end snout where the cam gear bolts onto. It's not likely that you'll find a marking just by popping the cam cover off unless you want to attempt (Not advised) to pull the cam bolt (it's torque to yield if it's stock) and look under there.

Odds are if it sounds stock then it's likely stock.
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
43,075
21,263
234
Box behind Walmart
Jul 21, 2017
#11
  • Jul 21, 2017
  • #11
I disagree that "back pressure" increases performance:



Tuned exhaust

A tuned exhaust system is an exhaust system for an internal combustion engine which improves its efficiency by using precise geometry to reflect the pressure waves from the exhaust valve or port back to the valve or port at a particular time in the cycle.

Tuned exhaust systems are common on motor racing engines, light aircraft engines,[1]model engines and two-stroke motorcycle engines, and are not restricted to these applications. They are of two main types:
  • In a four-stroke engine, tuned extractor manifolds are used to promote scavenging of the exhaust gases by delivering a pulse of negative pressure just before the exhaust valve closes.
In either case, the efficiency of the system is greatest at a particular engine speed, which is determined by the exhaust system geometry. Tuning the system for best effect is typically done both by calculation during the design of the exhaust system, and by trial and error during engine development.

An important recent development is variable geometry exhaust systems, both for two-stroke and four-stroke engines, which allow the tuning to be effective over a wider range of engine speeds.



Exhaust Scavenging

In automotive usage, scavenging is the process of pushing exhausted gas-charge out of the cylinder and drawing in a fresh draught of air or fuel/air mixture for the next cycle.

This process is essential in having a smooth-running internal combustion engine. If scavenging is incomplete, the following stroke will begin with a mix of exhaust fumes rather than clean air. This may be inadequate for proper combustion, leading to poor running conditions such as four-stroking.

Scavenging is equally important for both two- and four-stroke engines. However it is more difficult to achieve in two-stroke engines, owing to the proximity, or even overlap, of their induction and exhaust strokes. Scavenging is also equally important to both petrol and diesel engines.



Additional Notes

By removing the mufflers, you have changed the geometry of the tuned exhaust. It will not be as efficient at expelling exhaust gasses and will cause lazy exhaust to "hang out" in the exhaust system until it is pushed out. A tuned exhaust system "pulls" exhaust out of the combustion chamber when the exhaust valve opens, by using of the force of the previous exhaust pulse. An exhaust system with too large a diameter for the application will have the same effect.
 
Reactions: RaggedGT

wmburns

SN Certified Technician
Aug 14, 2009
5,892
514
204
Houston Texas
Jul 21, 2017
#12
  • Jul 21, 2017
  • #12
Just to "pile on" here.

I have to honestly say that I read the opening post and didn't understand what the OP was trying to say or ask for. I read it several times and it was still unclear to me exactly what the OP was saying and asking help with.

Rather than guess, I decided to stay quite.

But given the confusing nature of the opening post I have to say that it's not surprise to me that the replies are not what the OP was expecting.

But if the complaint is the idle lope let me ask. WHICH IAC was used? The original black vent or the non vented version that a 2002 model year should have? Because the 1996 PCM is going to be expecting the black vented IAC version.

Also. Has this PCM been tuned for the PI motor? While the stock 96 PCM will run a PI motor, it won't get the best results without a tune. Add to this equation that the Motor may have a cam and this may also be too much change for the stock PCM's tune.
 

rattlecan96gt

Active Member
Dec 22, 2016
106
8
28
Dallas, Texas
Jul 21, 2017
#13
  • Jul 21, 2017
  • #13
Wow! I just got slapped in the face with pure knowledge thank you all very much. I did not change the IAC I did not have any idea that ford decided to change that I will give that a try then tune the PCM for the PI motor. Now for the original post I did not realize my lack of literacy made that much of a difference but I see it now. thank you for sticking through my headache of a post and helping me out. Hopefully knowing what I know now will get more help in the future seeing as in the past "jokes" was pretty much all I would ever get. Also I originally posted this in the TECH forum but it got moved, and I also don't care about what people think of me and if I did care id be in a Camaro lol
 
Reactions: imp

rattlecan96gt

Active Member
Dec 22, 2016
106
8
28
Dallas, Texas
Jul 21, 2017
#14
  • Jul 21, 2017
  • #14
also to clear things up a bit I originally thought it was a stock PI cam. With the full exhaust on it would rumble really good and sounded like it tried to lope some. So I thought it must just be the difference in the PI cam itself. I took the mufflers off for the hell of it and now I clearly hear a beefier cam. what I was asking is there any tricks of the trade to figure out if it is an aftermarket cam or diag why its doing this? Also I should point out is there anything I can do in a apartment parkinglot? FULL EXHUST MEANING LONG TUBE HEADERS DELETED CATS INTO AN "X" PIPE UP TO TWO SLP MUFFLERS.
 

RaggedGT

Been here over a DECADE and still no CT
Mod Dude
Jul 20, 2014
4,739
3,188
203
Taylorsville ky
Jul 21, 2017
#15
  • Jul 21, 2017
  • #15
I moved your thread to talk .. sorry I forgot to mention it..

Tech threads are usually for 'How To' questions. I thought you would get more traffic in talk
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
43,075
21,263
234
Box behind Walmart
Jul 21, 2017
#16
  • Jul 21, 2017
  • #16
Not only that but the question below asks for opinions (hopefully based upon some experience). It's not asking for a list of steps or a troubleshooting procedure like what you might find in a Haynes manual or Ford shop manual but written by anyone. That makes the thread non-Tech.


rattlecan96gt said:
I checked and cleaned the iac and scanned the obd and came up with nothing but the results of a healthy PI 4.6 2v any ideas ?
Click to expand...

You were correct. This kind of question generates a lot more traffic in the Talk section.
 

Neuron

5 Year Member
Nov 6, 2016
859
192
93
Jul 21, 2017
#17
  • Jul 21, 2017
  • #17
Its probably just me, but when ever I hear an engine with no exhaust they all sound like they have a CAM to me. Modern engines are designed for an exhaust so I hate to be a downer but your CAM might just be your engine's normal sound without an exhaust.
 
You must log in or register to reply here.

Similar threads

S
5.0 Rebuild
  • smittys7up
  • Nov 29, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
8
Views
562
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Dec 20, 2025
Noobz347
J
'96 Cobra: A/C gets weak and engine misfires under load when warm
  • jruhnke
  • Oct 22, 2025
  • SVT Tech Forum
Replies
2
Views
312
SVT Tech Forum Nov 20, 2025
nickyb
S
New misfire after replacing valve seals/springs.
  • SpeedofDarkness
  • Aug 24, 2025
  • SN95 V6 Mustang Tech
Replies
0
Views
199
SN95 V6 Mustang Tech Aug 24, 2025
SpeedofDarkness
S
S
Trouble idiling
  • Smurf_3v
  • Jun 19, 2024
  • 2005 - 2009 Specific Tech
Replies
0
Views
440
2005 - 2009 Specific Tech Jun 19, 2024
Smurf_3v
S
Specific Cam Questions that Google can't seem to answer...
  • ChillPhatCat
  • Jun 20, 2024
  • 2.3L (N/A & Turbo) Tech
Replies
3
Views
791
2.3L (N/A & Turbo) Tech Jun 22, 2024
ChillPhatCat
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?