Removing air silencer takes horsepower!!
OiFlashX
the new 99 GT's, to see how much hp gain they get from mods. And they found
that removing the air silencer takes away about 3 hp and 4 lb-ft. of torque!
Not much, but I always thought and was told that removing the air silencer gave
alittle bit. The guys in the magazine said they were shocked as well.
-Franklin
'89 GT
Vortech Supercharger, GT-40X heads,
Cobra Intake, and much more..
Edward Kim
> I was reading my new issue of 5.0 Mustang, and they were doing dyno tests on
> the new 99 GT's, to see how much hp gain they get from mods. And they found
> that removing the air silencer takes away about 3 hp and 4 lb-ft. of torque!
> Not much, but I always thought and was told that removing the air silencer gave
> alittle bit. The guys in the magazine said they were shocked as well.
That is pretty surprising. I guess that the '99's air silencer helps air
flow a little bit.
********************************************************
*Edward Kim *
*Georgia Institute of Technology, Atlanta Georgia 30332*
*'97 SVT Cobra (#1714 of 6961) *
********************************************************
Michael Johnson
must be designed differently than the 87-93 silencer.
OiFlashX wrote:
> I was reading my new issue of 5.0 Mustang, and they were doing dyno tests on
> the new 99 GT's, to see how much hp gain they get from mods. And they found
> that removing the air silencer takes away about 3 hp and 4 lb-ft. of torque!
> Not much, but I always thought and was told that removing the air silencer gave
> alittle bit. The guys in the magazine said they were shocked as well.
>
Quick5pnt0
out adds hp. and torque.
.
Mike
5.0 Super Stallions Website
http://www.geocities.com/motorcity/lane/1520
Quick5pnt0
certain level of performance the silencer will hurt power, not help it.
Jared Rude
>I was reading my new issue of 5.0 Mustang, and they were doing dyno tests
on
>the new 99 GT's, to see how much hp gain they get from mods. And they
found
>that removing the air silencer takes away about 3 hp and 4 lb-ft. of
torque!
>Not much, but I always thought and was told that removing the air silencer
gave
>alittle bit. The guys in the magazine said they were shocked as well.
If you remove the air silencer on the SN95's, you draw hot air from the
engine bay. If you remove it on the Fox'es, you draw cold air from the
fender. It makes a difference.
--
Jared Rude
1990 LX 5.0
Lots faster than Marc Fencil's Camaro
remove "nospamforme" to reply
BB is WAR
engine bay. If you remove it on the Fox'es, you draw cold air from the
fender. It makes a difference.>>
So are you saying that it also hurts the 94-98s?
Vibrant Red '95 Mustang GT AOD-E
[3.55s, Flowmaster Catback System, ShiftPlus, K&N/Silencer]
STOP = Spin Tires On Pavement
Brian Kaul
be restrictive... it may just draw air from a cooler location.
Quick5pnt0 wrote:
--
Brian Kaul
Jared Rude
><<If you remove the air silencer on the SN95's, you draw hot air from the
>engine bay. If you remove it on the Fox'es, you draw cold air from the
>fender. It makes a difference.>>
>
>So are you saying that it also hurts the 94-98s?
It depends. Any time the engine draws air that's hotter than ambient
temperature, the engine will make less power than if it were drawing the
same volume flow of air that is at ambient temperature.
With the pre 99 SN95's, removing the air silencer could reduce the flow
restriction enough so that even though the hot air is less dense, you are
still drawing a larger mass flow of air than if it were cold, and being
drawn through the air silencer. The 1999's may be different. I haven't
looked at them.
Want to gaurantee you are making the most power possible? Make a cold air
induction kit to replace the air silencer. Make it large and draw air from
inside the inner fender well. Seal the air filter and have a large diameter
duct to the inner fender well wall in the engine bay. Will it make a lot
more power? Probably not. Will it make slightly more than you had before?
Yes. Maybe one or two hp more (?).
I actually was thinking how to do this while I was in Home Depot a few weeks
ago. You could use a plastic bucket that fits over the filter, while leaving
a few inches clearance around most of the filter. Then seal the back of the
bucket at the back of the filter where it connects to the MAF. Cut a six
inch diameter hole in the side of the bucket. Then get some six inch
diameter flex aluminum ducting and run it from the bucket to a hole you cut
in the side of the engine bay. All the stuff is available from Home Depot
for less than $35 total. All you need is some ingenuitly and spare time. You
will have to figure out how to attach the flex duct to the bucket and engine
bay wall.
wes...@my-dejanews.com
"Jared Rude" <jr...@nospamforme.bellsouth.net> wrote:
> If you remove the air silencer on the SN95's, you draw hot air from the
> engine bay. If you remove it on the Fox'es, you draw cold air from the
> fender. It makes a difference.
>
I didn't really care for the idea of hot air being drawn in either so instead
of just removing the silencer, I cut off part of it. Left enough to match up
to the hole in the fender well. It may not totally eliminate the hot air but
should make a pretty good reduction while still allowing the engine to
breathe.
--
Greg
1998 Cobra convertible, #2698 of 3480
Laser Red Tinted Clearcoat, Black Top, Black Leather
SCOA# 1409
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Joe Breitenbach
cone on the Fox bodies?
Joe
Calypso Green '93 5.0 LX AOD hatch with a few goodies
http://www.tranquilitybase.com/joe
Jared Rude wrote:
>
> BB is WAR wrote
> ><<If you remove the air silencer on the SN95's, you draw hot air from the
> >engine bay. If you remove it on the Fox'es, you draw cold air from the
> >fender. It makes a difference.>>
> >
Mr 5 0n ya
ago. You could use a plastic bucket that fits over the filter, while leaving
a few inches clearance around most of the filter. Then seal the back of the
bucket at the back of the filter where it connects to the MAF. Cut a six
inch diameter hole in the side of the bucket. Then get some six inch
diameter flex aluminum ducting and run it from the bucket to a hole you cut
in the side of the engine bay. All the stuff is available from Home Depot
for less than $35 total.>>
Jared, if you (or anyone else) are interested I can send a link to a homemade
cold air kit installation exactly like you are talking about for an '88 Turbo
Coupe. It lists which part numbers you should use from Lowe's. Since the cone
filter and holes in the fenderwells are in the same location as a 5.0 Mustang
the same parts should work.
Sam Ford
'88 TC
Mr 5 0n ya
cone on the Fox bodies?>>
Is this really true? I removed my airbox and put on a 7" K&N cone and noticed
an improvement from the stock airbox and drop-in K&N filter. I don't know how
many HP the cone gave me, but I did notice it right away. Maybe turbo cars are
different?
Sam Ford
'88 TC
BUILTALAST
60+ miles per hour......
Chris
>of just removing the silencer, I cut off part of it. Left enough to match up
>to the hole in the fender well. It may not totally eliminate the hot air but
>should make a pretty good reduction while still allowing the engine to
>breathe.
I did the same thing. No noticeable power decrease as opposed to
having the silencer boot completely removed and it's quieter too.
Jared Rude
>
>Jared, if you (or anyone else) are interested I can send a link to a
homemade
>cold air kit installation exactly like you are talking about for an '88
Turbo
>Coupe. It lists which part numbers you should use from Lowe's. Since the
cone
>filter and holes in the fenderwells are in the same location as a 5.0
Mustang
>the same parts should work.
Sure, post the link, I'd like to look at it.
Jared Rude
>Isn't this why a K&N in the stock air filter box is better than a K&N
>cone on the Fox bodies?
Yes.
After having a discussion with another Mustang owner at Moroso tonight, I
think I might go to a cone filter with a home made cold air induction kit.
He said he tested a lot of combos on a flow bench, and said the cone filter
offers more (and straighter) flow than a panel filter, due to the internals
and geometry of a cone filter. I suppose this is common knowledge, but he
said the difference in airflow between the panel filter and the cone filter
was significant.
He also said cutting out the bumps in the stock intake air tube, and
replacing them with a straight tube, picked up 70 cfm on a flow bench. I may
try that also.
Jared Rude
>Isn't this why a K&N in the stock air filter box is better than a K&N
>cone on the Fox bodies?>>
>
noticed
>an improvement from the stock airbox and drop-in K&N filter. I don't know
how
>many HP the cone gave me, but I did notice it right away. Maybe turbo cars
are
>different?
Any forced induction car (blower or turbos) will respond more to an air
filter change more than a naturally aspirated car. Basically, as you
decrease the flow restriction on the intake side of the compressor, the
outlet side will make more boost.
For your turbo car, drawing air which is slightly hotter probably won't make
any difference. When the air is compressed it is heated. The additional heat
from drawing engine bay air will probably not decrease the performance,
since that air will just be heated more in the compressor, and then cooled
in the intercooler.
Richard P Schuster
> Jared, if you (or anyone else) are interested I can send a link to a homemade
> cold air kit installation exactly like you are talking about for an '88 Turbo
> Coupe. It lists which part numbers you should use from Lowe's. Since the cone
> filter and holes in the fenderwells are in the same location as a 5.0 Mustang
> the same parts should work.
>
> Sam Ford
> '88 TC
Mr 5 0n ya
This is the page with the home-made Ram Air courtesy of Brett Bassett from the
Turbo Coupe mailing list. I'm pretty sure most of the same parts should work
on the 5.0. Have fun!
Sam Ford
'88 TC
Joe Breitenbach
filter by answering 'Yes' to my original question. But then you go on
to explain why the cone provides for better air flow. So, is the cone
actually better? And what about placement - engine compartment vs.
fender well?
Joe
Calypso Green '93 5.0 LX AOD hatch with a few goodies
http://www.tranquilitybase.com/joe
Jared Rude wrote:
>
> Joe Breitenbach wrote
> >Isn't this why a K&N in the stock air filter box is better than a K&N
> >cone on the Fox bodies?
>
> Yes.
>
> After having a discussion with another Mustang owner at Moroso tonight, I
> think I might go to a cone filter with a home made cold air induction kit.
>
> He said he tested a lot of combos on a flow bench, and said the cone filter
> offers more (and straighter) flow than a panel filter, due to the internals
> and geometry of a cone filter. I suppose this is common knowledge, but he
> said the difference in airflow between the panel filter and the cone filter
> was significant.
>
> He also said cutting out the bumps in the stock intake air tube, and
> replacing them with a straight tube, picked up 70 cfm on a flow bench. I may
> try that also.
>
Jared Rude
>Jared, you implied that the stock panel filter is better than a cone
>filter by answering 'Yes' to my original question. But then you go on
>to explain why the cone provides for better air flow. So, is the cone
>actually better? And what about placement - engine compartment vs.
>fender well?
Sorry, I meant the "yes" with respect to drawing cold air as compared to
drawing hot air. If a cone can draw cold air, then it is supposedly better
than a panel filter.
I personally would not run a cone filter exposed to the hot engine bay air.
this is what I meant, although I worded it all poorly.
ds...@mindspring.com
>I was reading my new issue of 5.0 Mustang, and they were doing dyno tests
on
>the new 99 GT's, to see how much hp gain they get from mods. And they
found
>that removing the air silencer takes away about 3 hp and 4 lb-ft. of
torque!
>Not much, but I always thought and was told that removing the air silencer
gave
>alittle bit. The guys in the magazine said they were shocked as well.
Insteresting. Was this tested on a chassis dyno? I would think on a car
sitting still, the underhood temperature could be a siginificant factor.
But on a moving car, I doubt they'd get the same loss.
What is the temperature under the hood (in both moving and non-moving
situations) in relation to the the outside temperature? Anybody know?
Dave
pcme...@boi.hp.com
: I was reading my new issue of 5.0 Mustang, and they were doing dyno
: tests on the new 99 GT's, to see how much hp gain they get from mods.
: And they found that removing the air silencer takes away about 3 hp
: and 4 lb-ft. of torque! Not much, but I always thought and was told
: that removing the air silencer gave alittle bit. The guys in the
: magazine said they were shocked as well.
It doesn't suprise me that the mouth-breathers at the magazine were
shocked. But it is a little suprising that they admit to being shocked.
They are not nearly as knowledgeable as they appear to be. And
Detroit's engineers are better than most of us give them credit for.
paul
--
Return address: pcme...@hpbs4922.boi.hp.com
The views expressed are the exclusive views of Paul C. Menten
and do not reflect the views of the provider of network access.
JD & Mona Adams
can't tell much of a difference, and what difference I could tell, was
that with the silencer in place, it ran better. I suspect it may not
actually be real airflow increases, but the way the MAF operates with
the silence in place. With the silencer in place, the air entering the
filter chamber gets swirled around a bit before hitting the MAF. This
may account for the difference.
I'd like to see them hook up a DVOM to the MAF, and test it both ways,
to see if this is indeed the case.
-JD