LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

How much Hp will this exhaust add to my car

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Old Feb 22, 2003 | 01:41 PM
  #31  
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Trey, if you would have half a brain, you'd realize that you lost time because you lost low-end torque and gained it higher than your converter could stall to.

Your friend's 396 is junk. Numerous people I know even with the 4" catbacks pick up horsepower when running open exhaust. Tell your friend to build a real 396 next time that benefits from an open exhaust.

A muffler change on your car wouldn't matter because you'd still be making 350 hp with a 383 that has stock, unported, 175-180cc heads.

Retort? I didn't think so.

Call me when you have grammatically passed the 3rd Grade.



Mike
Old Feb 22, 2003 | 01:54 PM
  #32  
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From: looking for a flow bench so Brook and I can race
Originally posted by Kraest
Trey, if you would have half a brain, you'd realize that you lost time because you lost low-end torque and gained it higher than your converter could stall to.

Your friend's 396 is junk. Numerous people I know even with the 4" catbacks pick up horsepower when running open exhaust. Tell your friend to build a real 396 next time that benefits from an open exhaust.

A muffler change on your car wouldn't matter because you'd still be making 350 hp with a 383 that has stock, unported, 175-180cc heads.

Retort? I didn't think so.

Call me when you have grammatically passed the 3rd Grade.



Mike
mike-
why dont you tell combo and thier 1300hp LT1 that their motors are junk? Your right mike, your definatly a better engine builder than them .
and you have theories
I have dynos and time slips.
my open exhuast ran like ****, even on the freeway

and then to make it worse, you resort to childish name calling
i wonder why jason didn't respond
you play my *** said so
i'll see you at the end of the track
and FYI,
I'll have my new heads on soon.
Old Feb 22, 2003 | 02:08 PM
  #33  
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On the dyno my car picks up 7RWH with the cutout open. So that shows there is some restriction. My car traps almost 126 mph in the 1/4. So it isn't anywhere near stock. I've seen a few 396 strokers on the dyno with Hooker LT's, Mufflex Y-pipe, and Mufflex 4" exhaust drop the 4" Flowmaster and pick up RWH. A Dynomax super turbo has an internal S design. The Ultraflow (which I have) is a straight through design. So the statement that (A) aftermarket muffler will not flow as much as (B) aftermarket muffler is false. The Ultraflow or Bullet will flow more than the super turbo. You may feel a slight low end torque loss on a mainly stock car, but that was already covered by Kraest.
Old Feb 22, 2003 | 02:10 PM
  #34  
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Let's see if we can sort this mess out

Originally posted by treyZ28
mike-
Your right mike, your definatly a better engine builder than them .

and you have theories

I have dynos and time slips.


my open exhuast ran like ****, even on the freeway

i'll see you at the end of the track


I'll have my new heads on soon.
Comparing me to them: No comparison.
Comparing me to you: Laughable.


You're making fun because of theories? ROFL. Don't you want to be an engineer? Yeah, hire Trey, the engineer. He can't think his way out of a cardboard box, but he can dig a mean ditch!

Automatics run like sh*t on the freeway. What else is new?

You'll see me at the end of the track? Cool. I guess you're taking field trips to the dragstrip on the short bus.

You better get those heads on, boy! 350 hp 383s were a thing of the 60s.

Mike
Old Feb 22, 2003 | 02:13 PM
  #35  
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Originally posted by vettethreat94z
Mr. Know-it-all

LMAO!

Bahahahahha!

Did you get the Z06 fully together yet? That cam sounded bad as hell, even on the phone!

Mike
Old Feb 22, 2003 | 02:17 PM
  #36  
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Originally posted by treyZ28


long tubes
catback
no cat
strait through muffler
not enough backpressure on a stock LT1
period

edit:
also
why are AS&M makeing more power than hooker headers in many cases????
Pleast post dynos, full mods lists, weather, DA, and any other information that would pertain to the dyno and post the graph. Just saying that in "most cases" hookers make less power doesn't say much of anything.

FYI: I gained about 5-6mph with LTs, 4" exhaust, no cats, on a stock motor with boltons.


Ryan
Old Feb 22, 2003 | 02:26 PM
  #37  
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yo i added a cutout to my car and gained at the track 104.12 to 107.32 mph

P
Old Feb 22, 2003 | 03:05 PM
  #38  
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From: looking for a flow bench so Brook and I can race
Originally posted by 96-speed
Pleast post dynos, full mods lists, weather, DA, and any other information that would pertain to the dyno and post the graph. Just saying that in "most cases" hookers make less power doesn't say much of anything.

FYI: I gained about 5-6mph with LTs, 4" exhaust, no cats, on a stock motor with boltons.


Ryan

Mods:
long tubes
catback
gears (3.73:1)

muffler on
13.2@106 consistantly. 2.1-2.0 60ft
muffler off-
13.6-13.8 2.1 60ft, and one 2.2 (bad run)

same day
9 runs that day within 4 hrs
take your muffler off
i bet you u will be slower.

mike- saying i'm dumb doesn't make you correct. I fail to see how making fun of me proves you to be any more correct?

sorry i didn't have another $2000 for heads when i was in highschool mike- that FURTHER proves that your right. I had no more money so no muffler will make you go faster.


You guys are all saying "my 10 & 11 sec cars gained by getting less restriction."

newsflash-
your car ISNT stock.

his car wont gain anything by changing one aftermarket muffler for another when his exhuast is already flowing so well.

Lets just turn this into another lounge event

BIGGER ISNT BETTER all the time. YOU CAN HAVE TOO LITTLE BACKPRESSURE.

It happened to me
it happened to my buddy.
both had headers and stock motors
i removed my muffler
he opened his cut out.

we both ran slower.
I dont care what your *** tells you or how many lounge people you can pull in here or how many 3rd grade insults you want to throw around.
I'm doing whatever gets my car to the end of the track faster.


and sorry i have had othe obligations than blowing all my money on a set of heads. My car is my project, not something i use to show off to people with. I had more important things in my life than heads at that point in time- like getting my truck, school, having fun, food, ect. Now go get threxx in here to argue my financial status while you're already pulling lounge members in here.
Old Feb 22, 2003 | 03:20 PM
  #39  
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Originally posted by V8
i put a cut out on my fairly stock car and gained a couple mph & a couple tenths in the 1/4
did you long tubes, a catback and stock motor?
Stock shift points? this would be the first i ever hear of a stock long tubed stock motor car with a 3'' catback gaining from a cutout.
Old Feb 22, 2003 | 03:38 PM
  #40  
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I am glad there are a couple members here that know something about cars. By the way a 4 inch pipe is coming next.!
Old Feb 22, 2003 | 04:12 PM
  #41  
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Thumbs up

1.3 hp

-Mindgame
Old Feb 22, 2003 | 04:18 PM
  #42  
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Thumbs up

Originally posted by V8
shorties, stock motor & 3" cat back
big difference.
try adding long tubes to the mixup.
I'd definatly agree with shorties/cut out combo.
:thumbsup:
Old Feb 22, 2003 | 04:56 PM
  #43  
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From: Thomasville, NC
Originally posted by treyZ28
big difference.
try adding long tubes to the mixup.
I'd definatly agree with shorties/cut out combo.
:thumbsup:
Trey,

A good friend of mine, '96 TA, Bolt On car(Hooker LT's, CAI, no cat, flowmaster and cutout)

Dynoed 304rwhp twice, cutout closed

Opened the cutout for last two runs,

Dynoed 312hp and 311hp respectively....

With LT's and a cutout, there's really enough backpressure, I don't care what you say....

Now Open LT's, a little much....

But when I see on the dyno, proven results....I tend to believe that


Billy
Old Feb 23, 2003 | 02:13 AM
  #44  
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Originally posted by joeSS97
I am glad there are a couple members here that know something about cars. By the way a 4 inch pipe is coming next.!
The few, the proud, the old-schoolers

Trey, 25592334 people posted agreeing with me that cutouts give hp, even on stock cars, and none with you.

You're wrong.

Get over it.

I'm going to sleep well tonight.

Toodle-oo.



Mike
Old Feb 23, 2003 | 10:17 AM
  #45  
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Originally posted by Derrick Redd
On the dyno my car picks up 7RWH with the cutout open. So that shows there is some restriction. My car traps almost 126 mph in the 1/4. So it isn't anywhere near stock. I've seen a few 396 strokers on the dyno with Hooker LT's, Mufflex Y-pipe, and Mufflex 4" exhaust drop the 4" Flowmaster and pick up RWH. A Dynomax super turbo has an internal S design. The Ultraflow (which I have) is a straight through design. So the statement that (A) aftermarket muffler will not flow as much as (B) aftermarket muffler is false. The Ultraflow or Bullet will flow more than the super turbo. You may feel a slight low end torque loss on a mainly stock car, but that was already covered by Kraest.

Thanks guys for the opinions
This is what I think about my situation. I have only a few mods, but the car like derrick said has a S inside the muffler and isn't a straight flow muffler, so it won't flow like a sraight one. the other problem was that the inlet of my muffler was only 2.5.. and the stock muffler was 2.75 so this maybe is a problem also



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