11-21-2007, 12:10 AM
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#1
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Boost Guru
Join Date: Mar 2004
Location: Buffalo, NY
Posts: 1,837
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HO Intake Manifold vs. Stock - Dyno Results
There's a guy over on j-body.org who finally dyno'd the stock manifold vs. the HO manifold.
Here's the link:
http://www.j-body.org/forums/read.ph...00177&t=400177
Current mods:
1) Intake and Exhaust cams are 200 @ 375
2) MD Ld9 lightened crank pulley
3) 2.5" magnaflow cat and 2.5" custom catback w/ factory flowing style muffler
4) TTR upper and lower mounts
5) Ebay AEM style intake
NO header, NO ported head, NO hstqc
Dyno results:
Stock 2.4 intake manifold (red line) - 141whp/144wtq
2.3 HO intake manifold (blue line) - 134whp/134wtq
The manifold has a 2.4 flange on it so port matching isn't even a question:
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Last edited by Spilner521 : 11-21-2007 at 12:13 AM.
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11-21-2007, 12:44 AM
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#2
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Keepin it Real
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 12,522
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so what i am taking away from this is the hybrid concept is not all its cracked up to be?
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2015 Audi SQ5
2000 Alero GLS Coupe - still in the family, but I don't drive it anymore
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11-21-2007, 11:34 AM
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#3
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GLS member
Join Date: Mar 2007
Location: Tx
Posts: 1,295
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yeah i thought so the HO weights more, but it still does looks better. But now we know its not worth the time and effort. But they do say it'll be better for turbo applications.
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I love the smell of burned rubber...except when I gotta replace my tires
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11-21-2007, 11:37 AM
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#4
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The Original Thread Whore
Join Date: Apr 2005
Location: NC
Posts: 2,127
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haha i always thought that hybrid was silly so here we go!! =-P
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2006 Scion xB - 5spd, Camouflage Metallic
....it has a Yakima rack - is that a mod?
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11-21-2007, 11:59 AM
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#5
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GLS member
Join Date: Mar 2007
Location: Tx
Posts: 1,295
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Not the WHOLE concept, just the heavy HO intake manifold
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I love the smell of burned rubber...except when I gotta replace my tires
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11-21-2007, 12:18 PM
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#6
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The Original Thread Whore
Join Date: Apr 2005
Location: NC
Posts: 2,127
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yeh i could see how it would benefit a boosted setup more...
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2006 Scion xB - 5spd, Camouflage Metallic
....it has a Yakima rack - is that a mod?
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11-21-2007, 12:37 PM
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#7
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GLS member
Join Date: Dec 2006
Location: Montreal, Qc, Canada
Posts: 1,876
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That was interresting. I agree with them when they say the HO was made for a higher rev and quite a few more hp engine.
On a N/A the engine probably lose hp sucking the air in the manifold design. Also, this guy doesn't have headers, maybe the flow from the intake is too big for the exhaust and the ECU runs it a bit leaner to compensate. Or maybe I'm a complete mecanical dumbass
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2 door 2000 Black GX With a stick: M45 eaton supercharger - Quad4's 57mm Throttle body - Custom WAI - KYB GR-2 struts - CM Lowering springs - Front and rear strut tower brace - R1 concept zinc plated drilled/slotted rotors with semi-metallic pads - short shifter.
Quote:
Originally Posted by Alerosaint
the #6 bolt torque..its impossible to get...unless I use telekenesis
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11-21-2007, 03:00 PM
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#8
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GLS member
Join Date: Jul 2004
Location: Where you should be
Posts: 5,577
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Dang HOs mess everything up. Nothing but drama
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11-21-2007, 07:41 PM
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#9
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GLS member
Join Date: Mar 2007
Location: Tx
Posts: 1,295
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Quote:
Originally Posted by Vinalero
That was interresting. I agree with them when they say the HO was made for a higher rev and quite a few more hp engine.
On a N/A the engine probably lose hp sucking the air in the manifold design. Also, this guy doesn't have headers, maybe the flow from the intake is too big for the exhaust and the ECU runs it a bit leaner to compensate. Or maybe I'm a complete mecanical dumbass
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I love the smell of burned rubber...except when I gotta replace my tires
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11-21-2007, 07:42 PM
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#10
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GL Member
Join Date: Jan 2007
Location: las vegas
Posts: 578
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well if you're a stock bolt on guy, the ho manifold is not for you.
If you're doing headwork, have some nice cams, header, exhaust, and intend to tune the setup, you'll end up benefitting from it.
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CARDOMAIN W/ DRAG VID & LIST OF MODS
Trevtec Motorsports built & driven - LV,NV
Revolution Lounge @ the Mirage
Promoter - PM me to be put on the list. Ladies first drink free wed, thur, sat
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11-21-2007, 07:43 PM
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#11
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GL Member
Join Date: Jan 2007
Location: las vegas
Posts: 578
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this is a great example but less drastic of...
hey guys I have a full 100% race header on my car that's great.................. on my bone stock motor that doesn't know what to do with it!
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CARDOMAIN W/ DRAG VID & LIST OF MODS
Trevtec Motorsports built & driven - LV,NV
Revolution Lounge @ the Mirage
Promoter - PM me to be put on the list. Ladies first drink free wed, thur, sat
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11-23-2007, 12:48 AM
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#12
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Owner
Join Date: Nov 2003
Location: Joliet, IL
Posts: 19,932
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interesting.
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72 442 "THE BEAST", 99 Alero - OSV Replica w/ original OSV parts, HURST Dual/Gate Shifter
Beware of the BackStabber
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11-23-2007, 01:37 AM
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#13
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Boost Guru
Join Date: Mar 2004
Location: Buffalo, NY
Posts: 1,837
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Quote:
Originally Posted by spyhunter
well if you're a stock bolt on guy, the ho manifold is not for you.
If you're doing headwork, have some nice cams, header, exhaust, and intend to tune the setup, you'll end up benefitting from it.
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I totally agree with you Spy. But you and I both know, maybe not everyone, but many people doing the HO manifold swap are the people that only have an intake and a cat-back on a stock tune.
Oldsman - what other top end work do you have done, including your exhaust?
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11-23-2007, 08:07 AM
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#14
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GL Member
Join Date: Jan 2007
Location: las vegas
Posts: 578
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Quote:
Originally Posted by Spilner521
I totally agree with you Spy. But you and I both know, maybe not everyone, but many people doing the HO manifold swap are the people that only have an intake and a cat-back on a stock tune.
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In which case they should case they should be looking at other things to step up before this needs to step up.
All that lil .org post showed me was that, if you want to take advantage of an HO manifold you better have some supporting modifications that necessitate the flow of the HO. Some good cams, and headwork that will "suck" in all the good air. Anything beyond intake header exhaust, people need to start thinking things through, and incorporate PCM tuning. If they want it done, "right".
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CARDOMAIN W/ DRAG VID & LIST OF MODS
Trevtec Motorsports built & driven - LV,NV
Revolution Lounge @ the Mirage
Promoter - PM me to be put on the list. Ladies first drink free wed, thur, sat
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11-26-2007, 12:26 AM
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#15
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Owner
Join Date: Nov 2003
Location: Joliet, IL
Posts: 19,932
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Quote:
Originally Posted by Spilner521
Oldsman - what other top end work do you have done, including your exhaust?
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secret cams, polish and ported head, ho intake, 62mm tb, header, 2.5 all the way back with high flow cat and other little bolt on crap.
I noticed when i did the swap orginally i lost power on the low to mid range. but after doing the head and cams and header i runs better. that 62mm tb is still killing the low end but so is the added weight.
Based off ASS mine is running right with 2.2 eco 5-spd and a 3400 with bolt ons. so not bad with the added weight.
This whole dyno thing just so you can't just throw crap together and have it work. You have to know what the hell your doing.
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72 442 "THE BEAST", 99 Alero - OSV Replica w/ original OSV parts, HURST Dual/Gate Shifter
Beware of the BackStabber
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11-26-2007, 09:04 PM
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#16
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Boost Guru
Join Date: Mar 2004
Location: Buffalo, NY
Posts: 1,837
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Quote:
Originally Posted by Oldsman
secret cams, polish and ported head, ho intake, 62mm tb, header, 2.5 all the way back with high flow cat and other little bolt on crap.
I noticed when i did the swap orginally i lost power on the low to mid range. but after doing the head and cams and header i runs better. that 62mm tb is still killing the low end but so is the added weight.
Based off ASS mine is running right with 2.2 eco 5-spd and a 3400 with bolt ons. so not bad with the added weight.
This whole dyno thing just so you can't just throw crap together and have it work. You have to know what the hell your doing.
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On your setup, with all the extra top end work and full exhaust, the HO manifold probably does help since the supporting mods can take advantage of the extra flow. And I agree with you and Spy...engine mods have to be thought out and everything has to compliment each other, instead of just throwing parts on that look good because everyone else did.
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