ClassicOldsmobile.com  

Go Back   ClassicOldsmobile.com > Repair & Restoration > Racing and High Performance
Sign in using an external account
Register Forgot Password?
Search

Welcome to Classic Oldsmobile Forum!
Welcome to Classic Oldsmobile forum,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Classic Oldsmobile Forum today!


Reply
 
 
 
submit to reddit
 
LinkBack Thread Tools Search this Thread Display Modes
Old January 8th, 2013, 12:48 PM   #1
Registered User
 
Join Date: Aug 2012
Posts: 151
Performer manifold

What would removing the center divider from a performer manifold do.Is it even possible.Thinking if it were a performance benefit it would have been done by the manufacturer.
drjr56 is offline   Reply With Quote
Old January 8th, 2013, 01:14 PM   #2
this is stressing me out
 
stressed1's Avatar
 
Join Date: Dec 2012
Location: Minnesota
Posts: 57
They do make them from the manufacturer. It's called a single plane intake. It sounds like you have a dual plane. Dual is arguably better for street because it makes power lower, although a single will make more, only at top end.
__________________
1975 Olds Ninety-Eight Regency coupe 455 tow rig
1970 Chevelle SS 454 4spd 600+hp pump gas
1970 Chevelle SS 396
1971 Roadrunner
1977 J20 Jeep pickup, lifted. 6BT 12V
various drivers
stressed1 is offline   Reply With Quote
Old January 8th, 2013, 01:19 PM   #3
Registered User
 
Join Date: Jan 2008
Location: South River, New Jersey
Posts: 1,793
I know my machinist cut down the center divider a little bit on my performer? is that just urban legend, he said it improves the manifold, I guess he took a 3/8ths to half inch cut?
__________________
ejhansen@comcast.net
69 Cutlass S 4 speed Convertible
Eddie Hansen is offline   Reply With Quote
Old January 8th, 2013, 01:23 PM   #4
Registered User
 
Join Date: Aug 2007
Posts: 1,880
Instead of doing all that, just try an open 1" spacer, same result. If no gains are realized, pretty easy to just remove it (or try a 4 hole spacer).
captjim is offline   Reply With Quote
Old January 8th, 2013, 01:37 PM   #5
this is stressing me out
 
stressed1's Avatar
 
Join Date: Dec 2012
Location: Minnesota
Posts: 57
Quote:
Originally Posted by Eddie Hansen View Post
I know my machinist cut down the center divider a little bit on my performer? is that just urban legend, he said it improves the manifold, I guess he took a 3/8ths to half inch cut?
I'm not sure I've ever heard of that, but you never know untill you do a dyno trial. I've actually seen cars loose horsepower to the rear wheels on the dyno because a spacer was added, even if it's a couple to a few horse. Just like those open top K&N filters are junk as holley's and other carbs like to feed from the side, and they lost rear wheel horse when compared to a dome top. You have to test the combo that works best with your build. My BBC is built right down to my power brakes, 4spd and manual steering in mind.
__________________
1975 Olds Ninety-Eight Regency coupe 455 tow rig
1970 Chevelle SS 454 4spd 600+hp pump gas
1970 Chevelle SS 396
1971 Roadrunner
1977 J20 Jeep pickup, lifted. 6BT 12V
various drivers
stressed1 is offline   Reply With Quote
Old January 8th, 2013, 02:20 PM   #6
Registered User
 
Join Date: Jan 2008
Location: South River, New Jersey
Posts: 1,793
I have seen that done before ( cutting the divider) he also fabbed aluminum plates and filled the heat crossover on the manifold, welded them , machined it flush like they never existed lol obviously I am not tuned to the latest and greatest and I put a lot of faith in my machinist, I didn't build a race motor or should say a motor to race I was a victim of MAW s .

What about that 'vodoo, jumbo jumbo , cone looking thing I have seen screwed into the floor of some manifolds? I guess I am trying to see hype from real help? Sorry for stepping on the tgread
__________________
ejhansen@comcast.net
69 Cutlass S 4 speed Convertible
Eddie Hansen is offline   Reply With Quote
Old January 8th, 2013, 03:31 PM   #7
Registered User
 
Join Date: Aug 2008
Location: Iowa
Posts: 1,130
Quote:
Originally Posted by stressed1 View Post
I'm not sure I've ever heard of that, but you never know untill you do a dyno trial. I've actually seen cars loose horsepower to the rear wheels on the dyno because a spacer was added, even if it's a couple to a few horse. Just like those open top K&N filters are junk as holley's and other carbs like to feed from the side, and they lost rear wheel horse when compared to a dome top. You have to test the combo that works best with your build. My BBC is built right down to my power brakes, 4spd and manual steering in mind.
My engines have all liked some form of carb spacers. Never made any difference with or without the top.......ET wise. I think that is an urban myth.
__________________
http://www.etdragracing.com/


380 Racer is offline   Reply With Quote
Old January 8th, 2013, 04:44 PM   #8
Moderator
 
oldcutlass's Avatar
 
Join Date: Oct 2009
Location: Granbury, Texas
Posts: 14,199
There are many instances where this has been referrenced, Cutlassefi has done it and stated in the past perhaps a 7hp gain. To me it's really not worth the hassle, and as stated above a 1/2" spacer will probably tell you if it's worth it.
__________________
- (other) Eric





There is nothing that can't be solved with a suitable amount of explosives!

1967 Oldsmobile Cutlass 468/ Turbo 400
1963 Plymouth Fury (Sold)
2006 Mustang GT (Momma's)
2006 Mustang Coupe(son'S)

http://s1141.photobucket.com/albums/n587/oldcutlass/

http://s1141.photobucket.com/albums/...lass/plymouth/
oldcutlass is online now   Reply With Quote
Old January 8th, 2013, 05:26 PM   #9
Registered User
 
Join Date: Aug 2012
Posts: 151
Was just wondering in theory how it might work,with the runners being different on the torker and performer,and I see torkers with cones in the plenum now..milling the divider helps mid and top,what would happen with no divider, just thinking out loud..guess if it were that good edelbrock would have made it that way..

Last edited by drjr56; January 8th, 2013 at 05:30 PM.
drjr56 is offline   Reply With Quote
Old January 8th, 2013, 05:35 PM   #10
CW3
 
ah64pilot's Avatar
 
Join Date: Apr 2011
Location: Houston, TX - Go Texans!
Posts: 2,832
ah64pilot ah64pilot
I have a Torker with a cone and when we added a 1" spacer on the dyno it lost HP...it's all subject to what your engine likes. To make a blanket statement that a spacer or cut divider is worth power is just wrong. Put it on the dyno and try it both ways (if you can) just to be sure. Otherwise, you may or may not have helped your power number by making changes like that...sort of your call.
__________________
'72 Cutlass Supreme 492 HP/544 TQ Engine Build Car Build
'72 Cutlass Supreme Convertible Car Build

ah64pilot is offline   Reply With Quote
Old January 8th, 2013, 07:34 PM   #11
this is stressing me out
 
stressed1's Avatar
 
Join Date: Dec 2012
Location: Minnesota
Posts: 57
Quote:
Originally Posted by 380 Racer View Post
My engines have all liked some form of carb spacers. Never made any difference with or without the top.......ET wise. I think that is an urban myth.
You gain power with a spacer, ah64pilot lost power with a spacer. I'm pretty sure it's your combination.

As for the open top filters, there are numerous threads on Yellowbullet covering this with proof and videos of such proof in action.

I've run many different intakes on my BBC, from performer RPM dual, to 454-R single to a nearly 7" tall Super Victor single w/ dominator feed only. The place you only really notice it it on a dyno or your ET.
__________________
1975 Olds Ninety-Eight Regency coupe 455 tow rig
1970 Chevelle SS 454 4spd 600+hp pump gas
1970 Chevelle SS 396
1971 Roadrunner
1977 J20 Jeep pickup, lifted. 6BT 12V
various drivers
stressed1 is offline   Reply With Quote
Old January 9th, 2013, 04:05 AM   #12
Registered User
 
Join Date: Aug 2008
Location: Iowa
Posts: 1,130
The open element was given to me, it does not hurt MY ETs when flip flopped on MY combos. That's what counts. I personally don't believe everything I read on the Bullet.
__________________
http://www.etdragracing.com/


380 Racer is offline   Reply With Quote
Old January 9th, 2013, 06:51 AM   #13
Registered User
 
455man's Avatar
 
Join Date: Nov 2010
Location: Wichita, Ks
Posts: 952
I've seen dyno's where the open element top gained a couple hp. Not really enough to notice. I think the overall theory was it depends on how much CFM you need and how much filter you already have. If you are maxed out then adding filter is not going to matter much.
__________________
'72 442 350/TH350
'72 Cutlass 455/TH400
455man is offline   Reply With Quote
Old January 9th, 2013, 06:51 AM
ClassicOldsmobile
1957 Oldsmobile




Paid Advertisement
 
 
 
submit to reddit
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
350 performer manifold 71supreme Parts Wanted 0 September 29th, 2010 07:01 AM
performer intake manifold for 455 chris83 Parts Wanted 4 March 30th, 2010 12:01 PM
performer manifold provisions ej69 Small Blocks 3 September 24th, 2009 05:03 PM
Performer rpm manifold 425 olds steve19 Parts Wanted 5 November 30th, 2008 11:05 AM


All times are GMT -7. The time now is 01:56 PM.


Advertising - Privacy Statement - Terms of Service - Jobs
All content Copyright 2008 by Internet Brands, Inc.

Search Engine Friendly URLs by vBSEO 3.5.2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62