Kenne Bells website says Longtubes do nothing for performance?

K

Kmoran81

Well-Known Member
#1
#1
Im probably ordering a KB supercharger next week. I just bought Long Tubes and an O/R midpipe.

On KB's website it says that Long tubes are a waste of money when using their superchargers. Literally it says that they have "0 rwhp gain"

This cant be true...can it?

Should I sell my Long Tubes that I just bought?
 
363Coupe

363Coupe

Well-Known Member
#4
#4
Kmoran81 said:
Really? So I should sell my long tubes and just buy a good catted H-pipe? I have flowmasters
Click to expand...
Just install it! I wouldn't sell it, your helping the car to breath better!

think of it like this: if you blow thru a straw hard your cheeks would stay puffed until its all out. Now do the same thing thru a garden hose of the same length.... your cheeks would represent the added pressure to force it thru the straw.
 
Last edited:
K

Kmoran81

Well-Known Member
#5
#5
So am I understanding this correctly...

If I put the 9psi pulley on the KB, and put long tubes on...Im probably going to end up with 7-8psi of boost?

So I could put a 10psi pulley on and end up with 8-9psi of boost?

The other thing I am a bit concerned about is the car being too loud. I dont want it totally obnoxious, just kind of obnoxious. lol
 
363Coupe

363Coupe

Well-Known Member
#6
#6
Kmoran81 said:
So am I understanding this correctly...

If I put the 9psi pulley on the KB, and put long tubes on...Im probably going to end up with 7-8psi of boost?

So I could put a 10psi pulley on and end up with 8-9psi of boost?

The other thing I am a bit concerned about is the car being too loud. I dont want it totally obnoxious, just kind of obnoxious. lol
Click to expand...
I wouldn't over think it... When I had my car the only time I had to change the pulley was when I added a front mount. For future mods, and power levels if you already own the long tubes just install them.
 
CXM

CXM

Well-Known Member
#8
#8
Your engine is an air pump. The better you make it breath the more power. Boost is a measured as a form of restriction. If you have a pulley that is supposed to make 10 psi on a stock engine that makes 300 hp. Then add LT, boost goes to 8 psi, but you now have 360hp. Same size pulley to make 10psi but you just made the engine breath better.
 
Stangerang

Stangerang

Member Plus
#11
#11
CXM said:
Your engine is an air pump. The better you make it breath the more power. Boost is a measured as a form of restriction. If you have a pulley that is supposed to make 10 psi on a stock engine that makes 300 hp. Then add LT, boost goes to 8 psi, but you now have 360hp. Same size pulley to make 10psi but you just made the engine breath better.
Click to expand...
x2, and the same goes with what PJ said. Think of it this way, you boost drops a bit when LT's are added, but the power level increases, and there is a bit less strain on the motor since the psi levels drop.
 
RedMOsesSC

RedMOsesSC

Well-Known Member
#12
#12
The LT's breath so well you loose boost pressure, your looking at that as a negative but its the other way around, because you can expell exhuast in a much more efficient mannaer, that means you can run MORE BOOST!

Forge the bottom and Crank it up.
 
1Blue02GT

1Blue02GT

Member
#13
#13
yeah, with long tubes you lose low end power, but, yeah the engine is breathing better so its good for the engine.. long tubes give the car a deep aggresive sound, it wont be horribly loud, but the sound is gonna b good..
 
TBapp3

TBapp3

Northern NY Regional Coordinator
#14
#14
i have also read with are new era stangs that headers arnt too nesasary and that they willnt add much power it said commpaired to the money spent on the heads u should just leave um stock
I thought it was a crock of s#@t though
 
RedMOsesSC

RedMOsesSC

Well-Known Member
#15
#15
05+ OEM exhaust manifolds flow very well but theres no way they will do a better job than LT's, 05+ benefits less from "Scavanging" effect of long tubes but it still benefits.
 
jkstang78

jkstang78

Well-Known Member
#18
#18
Kmoran81 said:
So am I understanding this correctly...

If I put the 9psi pulley on the KB, and put long tubes on...Im probably going to end up with 7-8psi of boost?

So I could put a 10psi pulley on and end up with 8-9psi of boost?

The other thing I am a bit concerned about is the car being too loud. I dont want it totally obnoxious, just kind of obnoxious. lol
Click to expand...

That is coorect. I talked to JDM in NJ I want to do some work with my lightning. I asked about the long tubes and catted pipe they sell. They said I would loose 1 lb of boost because of less restriction. So when you do go for it get it with a pilley 1 or 2 more.
 
X

xxkazp3rxx

Active Member
#19
#19
I agree with what everybody said... I also had Longtubes on my 04' GT when I had it... But I will say this... the only knock on LT's for our cars is that the cost of them + install isn't worth the power.. and it's really not, but people (myself included) do it anyway... I did mine more for sound and I had the money... but if you're a budget guy and just looking for power, I would say to not install them... Sometimes, it's only about cost per horsepower..
 
You must log in or register to reply here.