Headers vs. Manifolds - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 01-01-2006, 04:06 PM   #1
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Nov 2005
Location: The Big "OH"
Posts: 92
Thanks: 0
Thanked 0 Times in 0 Posts
mikey383 is on a distinguished road
Default Headers vs. Manifolds

Just wanting some opinions. I'm thinking about purchasing some headers from ZZP, but they are twice the price of the PEMs. Are they really worth the price, or will the manifolds be the better alternative?
mikey383 is offline   Reply With Quote
Old 01-01-2006, 06:25 PM   #2
Senior Member
Posts like a Camaro
 
Join Date: Apr 2005
Location: montreal, Canada
Posts: 1,108
Thanks: 0
Thanked 0 Times in 0 Posts
mike_peperni is on a distinguished road
Default

Headers will give a much better flow, choose the headers if you plan getting serious about mods.
mike_peperni is offline   Reply With Quote
Old 01-02-2006, 03:58 PM   #3
Senior Member
True Car Nut
 
Join Date: Feb 2003
Posts: 3,684
Thanks: 0
Thanked 0 Times in 0 Posts
smellbird is on a distinguished road
Default

One thing I have heard is that if you plan on running sub 13'*, get headers. Otherwise PEM'* will flow sufficiently.
smellbird is offline   Reply With Quote
Old 01-02-2006, 04:14 PM   #4
Junior Member
 
Join Date: Dec 2005
Location: Sioux Falls, SD
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
wildmanben is on a distinguished road
Default

headers probably wont help you much unless your pushing some serious hp. from what I have read anyways. You might gain some top end and lose some bottom end.
wildmanben is offline   Reply With Quote
Old 01-03-2006, 09:07 AM   #5
Senior Member
Posts like a Supercharger
 
Join Date: Dec 2005
Location: Ohio
Posts: 171
Thanks: 0
Thanked 0 Times in 0 Posts
GTPboy is on a distinguished road
Default

Ported mani'* are good into 10s (setup dependent of course).

If your staying */Ced ported mani'* will be ok into the high 12s. I'm running ported mani'* mani'* on my 2nd GTP and will be running 12.6s or so.
My other GTP has TOGs, and will be in the high 11s. Both */Ced (one with a Gen 5).

I know the bonne'* are heavier, but here is just some info from from a 3600lb car(*).

Good Luck.
GTPboy is offline   Reply With Quote
Old 01-04-2006, 05:01 AM   #6
Senior Member
Posts like a Camaro
 
Join Date: Dec 2005
Location: Clovis, CA
Posts: 851
Thanks: 0
Thanked 0 Times in 0 Posts
MACDRIVE is on a distinguished road
Default

Yeah I agree as stated. Now for my opinion: Do roller rockers first.
MACDRIVE is offline   Reply With Quote
Old 01-09-2006, 09:13 PM   #7
Senior Member
True Car Nut
 
Join Date: Jul 2003
Location: Westerville, Ohio 2000 Black SSEi
Posts: 6,127
Thanks: 0
Thanked 0 Times in 0 Posts
Rogue is on a distinguished road
Default

The biggest problem with modding an SSEi (at least the 2000+) is getting rid of KR. The PCM is so invasive that it seems to pull timing at the slightest problem and TM is introduced as KR so its hard to know whats real and what isn't. I constantly battled KR and really only got rid of it after I did headers, cam and extensive PCM work although in the cars defense every time I got close to getting rid of it I added a new mod .

You can get all the air you want into the motor to make power but if you cant get the hot exhaust out quick enough you bottleneck, boost stack, and heat soak the motor leading to a greater likelyhood of KR and hurting the motor. I would say the typical mod path would go something like this:

3.4 pulley
rockers
3.3 pulley
headers
3.2-3.1 pulley
cam
injectors
2.9-3.0 pulley
heads (or intercooler)
2.7-2.8
heads (or intercooler)
2.6 + timing

some people skip the rockers and go straight for the cam but you definately want to be able to get the air out that the cam is processing.
Rogue is offline   Reply With Quote
Old 01-10-2006, 12:14 AM   #8
Senior Member
Posts like a Corvette
 
Join Date: Jan 2004
Location: Montréal, QC
Posts: 1,374
Thanks: 0
Thanked 0 Times in 0 Posts
Foghorn is on a distinguished road
Default

Before I did the cam and other stuff, I installed TOG headers and to this day I still think it was one of the best mods.

Cheers,
Foghorn is offline   Reply With Quote
Old 01-10-2006, 12:34 AM   #9
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

I my TOG'*.
2000SilverBullet is offline   Reply With Quote
Old 01-10-2006, 07:45 AM   #10
Senior Member
True Car Nut
 
Join Date: May 2003
Location: Holt, MI & Lima, OH
Posts: 3,022
Thanks: 0
Thanked 0 Times in 0 Posts
dbtk2 is on a distinguished road
Default

In reality you need to just look at how fast you want to go. Headers are a great mod, they provide a very nice (and very noticable) gain. However, as you've already seen, they are also a bit pricey and depending on your goals for your car, might be overkill. I've seen plenty of GTP'* hit high 12'* with stock manifolds, while those cars are lighter and have a few advantages that would still put a Bonnie in the 13.3 range or so. I would say that if you're looking to go 13.5 or quicker, headers are a no brainer. If you're just looking for high 13'*/low 14'*, then ported manifolds or stock manifolds are the way to go.

What are your goals for the car?

Shawn
dbtk2 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Porting Exhaust Manifolds. merlin Performance, Brainstorming & Tuning 2 07-08-2003 10:56 PM
How many exhaust manifolds are like jrs3800 ? lght1 1992-1999 11 06-03-2003 05:01 PM
Couldn't you port your own exhaust manifolds? brminder Performance, Brainstorming & Tuning 9 02-28-2003 02:35 PM
Plastic Intake Manifolds? Jim W 1992-1999 5 12-30-2002 10:11 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:35 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.