Piping size
06-08-2010, 01:47 PM
#1
New Member
Thread Starter
Join Date: 09-24-08
Location: VA
Posts: 86
Likes: 0
Received 0 Likes
on
0 Posts
Piping size
I am going to be turboing my lsj soon and just wondering what size piping would be the best?
Im gonna have
s256et
ported and polished head
darton sleeves
diamond pistons
78lbs valve springs
and all the turbo bolt ons....
Any recommendations?
Im gonna have
s256et
ported and polished head
darton sleeves
diamond pistons
78lbs valve springs
and all the turbo bolt ons....
Any recommendations?
06-08-2010, 02:09 PM
#6
Senior Member
Join Date: 10-01-06
Location: Maidstone, SK
Posts: 5,134
Likes: 0
Received 0 Likes
on
0 Posts
To take out any turbulence a MAF must; be placed at least 6-10 inches after any neck or bend, and 4-6 inches before any neck or bend.
ie; you only need a clean 10-16 inches of 3" pipe to have the MAF work properly.
06-08-2010, 02:39 PM
#8
Senior Member
Join Date: 10-01-06
Location: Maidstone, SK
Posts: 5,134
Likes: 0
Received 0 Likes
on
0 Posts
If you are running the pipe through the fender well, where the stock intake goes, you can have over 50" of pipe length from just the IC to the TB.
At 2.5" with a 3" section, that's a volume of 246 cubic inches.
A full 3" would be 353 cubic inches.... that's nearly 50% more mass that has to be accelerated or deccelerated during transient flow.
So, the simple answer is; it's simply un-needed.
Especially when 3" mandrels cost almost double to buy... it's far cheaper to do a 2.5", with a 3" section.
06-09-2010, 06:20 PM
#10
Senior Member
iTrader: (6)
Join Date: 07-24-09
Location: Lewisburg, Pa
Posts: 1,680
Likes: 0
Received 0 Likes
on
0 Posts
That's gay. I just bought a 3'' universal kit and I already had it setup 2.5 - 3 - 2.5
FML
How about that base tune man haha I'll have hpt soon I need something to go off of. If you don't wanna do it it's cool.
FML
How about that base tune man haha I'll have hpt soon I need something to go off of. If you don't wanna do it it's cool.
Last edited by terry11; 06-09-2010 at 06:20 PM. Reason: Automerged Doublepost
06-09-2010, 06:54 PM
#11
Banned
Join Date: 06-23-05
Location: ky
Posts: 8,032
Likes: 0
Received 0 Likes
on
0 Posts
06-09-2010, 06:57 PM
#12
Senior Member
Join Date: 04-13-09
Location: WI
Posts: 1,450
Likes: 0
Received 0 Likes
on
0 Posts
Because going straight 3" is a lot of un-needed volume that which results in a lot of air mass to move, thus slowing spool and charge velocity.
If you are running the pipe through the fender well, where the stock intake goes, you can have over 50" of pipe length from just the IC to the TB.
At 2.5" with a 3" section, that's a volume of 246 cubic inches.
A full 3" would be 353 cubic inches.... that's nearly 50% more mass that has to be accelerated or deccelerated during transient flow.
So, the simple answer is; it's simply un-needed.
Especially when 3" mandrels cost almost double to buy... it's far cheaper to do a 2.5", with a 3" section.
If you are running the pipe through the fender well, where the stock intake goes, you can have over 50" of pipe length from just the IC to the TB.
At 2.5" with a 3" section, that's a volume of 246 cubic inches.
A full 3" would be 353 cubic inches.... that's nearly 50% more mass that has to be accelerated or deccelerated during transient flow.
So, the simple answer is; it's simply un-needed.
Especially when 3" mandrels cost almost double to buy... it's far cheaper to do a 2.5", with a 3" section.
Thread
Thread Starter
Forum
Replies
Last Post