Running only l/t headers..no exhaust?

J

justinschmidt1

Member

Jun 15, 2005

349

0

16

Jul 9, 2007

#1

• Jul 9, 2007

• #1

Would this gain any hp?...just curious...

 

SXYXC

New Member

Apr 22, 2007

77

1

0

Jul 9, 2007

#2

• Jul 9, 2007

• #2

as for gain hp maybe on the high end... but you will lose alot of torque on the low because of the lack of backpressure...

 

S

Scorcher2005

Member

Apr 17, 2004

883

0

16

South Carolina

Jul 9, 2007

#3

• Jul 9, 2007

• #3

My buddy ran his car around the block like that to see how it was before the rest of the exhaust was put on. He said it ran like crap.

 

Miles

Founding Member

Aug 14, 2001

1,225

0

0

Burlington, ON

Jul 9, 2007

#4

• Jul 9, 2007

• #4

You'd have no cats, no backpressure, no feedback to the computer on closed loop.. it would definitely run like crap without a tune (and even a tune would be a band-aid tune).

Would probably be pretty damn loud I would imagine

 

G

getusummm

Member

Dec 26, 2004

156

0

16

Jul 9, 2007

#5

• Jul 9, 2007

• #5

I have a couple buddys who race chevy 388s. They run long tubes with an 18" piece of striaght pipe. Not sure what length you would need for your engine though.

 

R

rugster

New Member

Aug 31, 2004

156

0

0

Jul 9, 2007

#6

• Jul 9, 2007

• #6

Isnt it dangerous running with that little back pressure on these motors? i have heard about burning valves and some other experiences...but like I said I have only "heard" these things, not sure if there is any truth to the myth.

 

blckstng96

Member

Apr 13, 2004

208

0

16

Jul 10, 2007

#7

• Jul 10, 2007

• #7

save the lts and straightpipes for the chevys,all it does is make the car loud,it will be slow as a dog and have no acceleration,sound like poop when you let of and downshift and it has the potential of damaging parts

 

Stan Weiss

Member

Dec 8, 2006

347

2

16

Philadelphia, PA

Jul 10, 2007

#8

• Jul 10, 2007

• #8

getusummm said:

I have a couple buddys who race chevy 388s. They run long tubes with an 18" piece of striaght pipe. Not sure what length you would need for your engine though.

Click to expand...

Yes the collector extensions diameter and length need to be matched to the engines power curve, weight of the vehicle, gear ratios of the vehicle. trans type and if automatic stall speed just as with a carb and distributor you will need to tune the fuel and timing curves .

 

96GTstang46

New Member

Nov 20, 2006

142

0

0

Seattle, Washington

Jul 10, 2007

#9

• Jul 10, 2007

• #9

Well, i have "Dump Tubes" on my car and right after the headers i have some cut out pipes with some pipe caps on them... when i take them off the car is just really loud, but seems to pull harder up top and seem like it has more power.. maybe its just me and the noise makes me THINK its faster or something i have no track times to prove me either way, but i dont notice that it runs like crap or anything.. just my imput.. what do you think?

 

K

Kilgore Trout

Fried or Broiled ?

10 Year Member

Mar 30, 2005

4,749

95

134

Jul 10, 2007

#10

• Jul 10, 2007

• #10

justinschmidt1 said:

Would this gain any hp?...just curious...

Click to expand...

Would you do it if it did?

Anyway, its a bad idea because:
-it sounds like azz
-it reduces backpressure
-it reduces off the line grunt (moves it up top though)
-cold air sucking back into the pipes can warp an exhaust valve

Also I am not sure but I think that some technical problem can be caused with the piston rings if there is not sufficient backpressure

 

S

spitfirees20

New Member

Nov 17, 2006

38

0

0

Jul 10, 2007

#11

• Jul 10, 2007

• #11

+1, really would recommend against it, if not for technical reasons it would just sound like crap.

 

CobraRed_96_GT

Active Member

May 20, 2006

1,421

4

39

UCSD/La Jolla

Jul 10, 2007

#12

• Jul 10, 2007

• #12

only if your running a turbo'd car would this be a good idea