holley/Weiand intake good or bad?
01-15-2006, 06:03 PM
#1
TECH Enthusiast
Thread Starter
iTrader: (6)
Join Date: Dec 2005
Location: butler, pa
Posts: 548
Likes: 0
Received 0 Likes
on
0 Posts
holley/Weiand intake good or bad? I was looking into getting a polished weiand intake.....compared to the ls6 are they good or bad...i heard they are bad because they are aluminum...i know they cost more but there are some on ebay fairly cheap....i just want to know if i am going to lose hp with this one compared to the ls6...any input would be great..thank you
01-15-2006, 07:01 PM
#2
TECH Regular
iTrader: (14)
Join Date: Oct 2005
Location: Dayton, Ohio
Posts: 437
Likes: 0
Received 0 Likes
on
0 Posts
good or bad. Depends on what you are after... I don't know the flow numbers off hand but I've heard that the LS6 typically flows a little better than the Weiand, however the Weiand can be ported and so fourth to more than make up for the difference: I believe they actually come in two pieces for this reason.
Horsepower loss is generally attibuted to the fact that aluminum is an awesome thermal conductor. As air passes through the intake passages it picks up the heat being transfered from the heads through the intake manifold. As the intake charge warms up the density drops so this affects how much oxygen is available for the combustion process.
On the other hand they look pretty sweet. Especially the polished versions. If you ever want to do a direct port nitrous application you can also use the intake but you'll have to do some drilling and tapping.
Has anyone ever coated the inside of an aluminum intake to act as a thermal barrier? I'll bet some sort of plastic coating would do just the thing.
Horsepower loss is generally attibuted to the fact that aluminum is an awesome thermal conductor. As air passes through the intake passages it picks up the heat being transfered from the heads through the intake manifold. As the intake charge warms up the density drops so this affects how much oxygen is available for the combustion process.
On the other hand they look pretty sweet. Especially the polished versions. If you ever want to do a direct port nitrous application you can also use the intake but you'll have to do some drilling and tapping.
Has anyone ever coated the inside of an aluminum intake to act as a thermal barrier? I'll bet some sort of plastic coating would do just the thing.
Trending Topics
01-16-2006, 09:32 AM
#8
There is a foam insulator under the intake between the valley cover ,it help a little but like i said the port & polished runners and match port to the heads would make up for the power loss because of the heat and when using n.o.s. it don't really mater about heat because the n.o.s. is very very cold stuff
01-16-2006, 03:46 PM
#11
On The Tree
iTrader: (3)
Join Date: Dec 2005
Location: Black Mountain, KY
Posts: 157
Likes: 0
Received 0 Likes
on
0 Posts
I have a copy of Chevy Hi-Performance sponsored magizine thats nothing but mods for a LS1 motor, of all the intakes that existed in '04 the unmodified Weiand had the lowest gain of hp/tq. The highest suprisingly is the high rise intake off of the 5.3 ls based truck motor. I'll list the exact name of the magizine and its publication date when I get home.
03-15-2006, 10:36 PM
#13
12 Second Club
iTrader: (17)
Join Date: Nov 2004
Location: Near Philly,PA
Posts: 1,639
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Randy WS6
Yes, Just like the LS1, but you cant use a stock fuel rail because the runner are to tall for the cross over pipe ,but you may be able to modify them i don't really know
Sorry to bump and old thread but can this be verified 100%? This is the first I've read regarding this problem.
Can anyone else chime in?
03-15-2006, 11:00 PM
#14
12 Second Club
iTrader: (16)
Join Date: Jul 2005
Location: central coast, cali
Posts: 783
Likes: 0
Received 0 Likes
on
0 Posts
i just bought one... many members say it doesnt perform as good as the ls6 intake, however, they have never really purchased and installed the intake themselves, i looked around and found some members who have bought the intake and all of them are satisfied with the intake id rather take to advice of the ls1tech members who have actually installed one rather than others who have said that it will peform less than an ls6 due to heat soak..here..this might help you
exoticperformanceplus.com quotes on their website the following:
"We bolted a Weiand/Lingenfelter aluminum intake manifold onto a stock 1999 Pontiac Trans-Am WS6, and we were rewarded with 22 more RWHP on our Mustang Chassis Dynamometer at Exotic performance Plus."
A ls1 tech member installed one and said this:
I had both a GM LS6 intake manifold and a Ported Weiand Aluminum LS6 style manifold on my 346. The ported aluminum manifold made about 7RWHP more than the plastic GM LS6 manifold did. On my car the GM plastic LS6 manifold made 17 RWHP more than the plastic GM LS1 intake manifold did. Heat soak really doesn't make that much of significant difference with the aluminum manifold as some would say it does, and they look good polished.
exoticperformanceplus.com quotes on their website the following:
"We bolted a Weiand/Lingenfelter aluminum intake manifold onto a stock 1999 Pontiac Trans-Am WS6, and we were rewarded with 22 more RWHP on our Mustang Chassis Dynamometer at Exotic performance Plus."
A ls1 tech member installed one and said this:
I had both a GM LS6 intake manifold and a Ported Weiand Aluminum LS6 style manifold on my 346. The ported aluminum manifold made about 7RWHP more than the plastic GM LS6 manifold did. On my car the GM plastic LS6 manifold made 17 RWHP more than the plastic GM LS1 intake manifold did. Heat soak really doesn't make that much of significant difference with the aluminum manifold as some would say it does, and they look good polished.
03-16-2006, 06:04 AM
#16
12 Second Club
iTrader: (17)
Join Date: Nov 2004
Location: Near Philly,PA
Posts: 1,639
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by orangeapeel
Call Weiand.
Well maybe I don't want to!!
I guess I will, I thought maybe someone could answer my question real quick.,
03-16-2006, 10:16 AM
#19
And for his question can you use stock fuel rails with this manifold........Yes
I currently have one as well not yet installed but just waiting to jump in there. For a forced induction setup they are good insurance as well. Even though I have only seen one stock manifold failure in the past.
I currently have one as well not yet installed but just waiting to jump in there. For a forced induction setup they are good insurance as well. Even though I have only seen one stock manifold failure in the past.
