hey guys not to beat a dead horse but it looks like i may be getting a 626 manifold for my MSP soon.. im sure there is a ton of info out there and maybe even a thread or two.. i was wondering tho what the advantages are over stock? what does it do for me? also how much of a b**** is the install, and last but not least ive read that you can take off the VTCS on your stock manifold and see similar gains... what is that and how can i do it? sorry lots of information crammed in here but im very curious to know before i take this on what works best etc.... feel free to redirect if there is already a how to or good post about this stuff
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626 mani info
- Thread starter msp1986
- Start date
KrayzieFox
Member
- :
- 01 MP3 Turbo
Advantages over stock are a single runner design and lack of VICS & VTCS which allows for more airflow at higher RPM. ProtegeGarage showed a gain of 24 HP. I personally think the number is a bit high, but you can definitely feel a good gain after 4000 RPM. Under 4000 RPM, you will feel a slight loss but the gains in the mid-high RPM range are what make this mod worth it.
If you don't want to sacrifice your low end, then just remove the VTCS off your stock manifold instead. You will still get some high end improvement without losing as much low end. To do it, the manifold needs to be removed and the flaps that cover the runners need to be taken out. Then you port the lips on which the flaps sat and polish the runners to improve overall airflow.
The hardest part about the install is usually the EGR tube. It's just akward, that's all. Make sure to use new gaskets for the manifold and throttle body as well, don't reuse the old ones. If you buy the manifold used, make sure it's from 00-02 626 models without VTCS, and you will need an EGR pipe from a 01-02 626 model. 00 EGR pipes will not work. The easiest would be to just buy everything from ProtegeGarage.
If you don't want to sacrifice your low end, then just remove the VTCS off your stock manifold instead. You will still get some high end improvement without losing as much low end. To do it, the manifold needs to be removed and the flaps that cover the runners need to be taken out. Then you port the lips on which the flaps sat and polish the runners to improve overall airflow.
The hardest part about the install is usually the EGR tube. It's just akward, that's all. Make sure to use new gaskets for the manifold and throttle body as well, don't reuse the old ones. If you buy the manifold used, make sure it's from 00-02 626 models without VTCS, and you will need an EGR pipe from a 01-02 626 model. 00 EGR pipes will not work. The easiest would be to just buy everything from ProtegeGarage.
- :
- 2003 mazdaspeed protege
24 hp.!?! ima have to check that out
dead link. i assume youre referring to the JDM Sam topic. its an involved process but you do get some substantial gains.
http://www.mazdas247.com/forum/showthread.php?t=123744816 found it. 30whp on a more capable car, but still, if youre making 250 at the wheels thats probably 15-20 or so.
yeah boring that manifold was a b****. that mod made it like a surge tank or reservoir.
read this if you want learn a little about intake manifold design.
http://www.amsperformance.com/pdfs/intakemani.pdf
read this if you want learn a little about intake manifold design.
http://www.amsperformance.com/pdfs/intakemani.pdf
24 hp is full of s***.
Exactly. But that does not stop people from ditching a perfectly good intake manifold which came with the car and putting a 626 type on their car.
- :
- 2002 BJFW, 2007 BK3P, 1979 SA22C, 2005 BK3P
we did not make up the dyno chart. i'd say i resent the insinuation but i honestly don't care one way or the other. the manifold works well for many people. you can lose a bit of low end torque, sure. i personally feel the top end and mid range gains are worth it. some people like it, some people don't. is the number probably high? i'd agree it is. i'd be happy to have a local person or anyone bring a stock msp in, do the manifold and dyno it again. but we'd all be naive to think that'd ever settle the argument. people are going to believe what they want to believe.
if the car ran poorly with it when you got it that way, chances are something was installed wrong. 99% of any issue i get with a 626 manifold comes from a bad install. some people don't like it, some people post or talk about great gains and others have posted no gains. there is this thing called dyno variation or correction factors or common sense even which would dictate that no two cars will ever dyno the same on different or even the same dyno. heck that might even be more plausible than someone forging something. but what do i know.
as for the stock manifold being "perfectly good", sure, in terms of being tuned for fuel economy and emissions, it is. there is a reason mazda went with a new manifold design on the same engine and it wasn't for horsepower, sorry to burst anyone's bubble here. its all part of the transition from "california VS federal emissions" to "everyone gets california emissions equipped cars whether they want it or not". its cheaper for the manufacturer at the end of the day and has nothing to do with power, torque, tuning, etc.
if the car ran poorly with it when you got it that way, chances are something was installed wrong. 99% of any issue i get with a 626 manifold comes from a bad install. some people don't like it, some people post or talk about great gains and others have posted no gains. there is this thing called dyno variation or correction factors or common sense even which would dictate that no two cars will ever dyno the same on different or even the same dyno. heck that might even be more plausible than someone forging something. but what do i know.
as for the stock manifold being "perfectly good", sure, in terms of being tuned for fuel economy and emissions, it is. there is a reason mazda went with a new manifold design on the same engine and it wasn't for horsepower, sorry to burst anyone's bubble here. its all part of the transition from "california VS federal emissions" to "everyone gets california emissions equipped cars whether they want it or not". its cheaper for the manufacturer at the end of the day and has nothing to do with power, torque, tuning, etc.
Last edited:
- :
- 2002 BJFW, 2007 BK3P, 1979 SA22C, 2005 BK3P
damn it, screw california, theyre ruining everything for everyone. nancy pelosi should go get worked in by the governator. i never though about that before now, and now im pissed.
there are more cars in california than on the entire continent of europe. the emissions laws they pass are effectively national laws in that respect. as cali leads so follows the nation.
if you looking i have a 2001 626 without vtcs ,its the best 626 manifold you can find the one everyone talks about. I got it used with mabby 40,000 miles on it i cleaned it, got it powdercoated black looks brand new let me know if you what it or if anyone else whats it
cougar10agREDUX
Member
- :
- 2003 Protege ES-T
I'm a believer in the 626 Mani. didn't need a dyno to tell me i got some good gains.
@Ken - in no way was insinuating that you made up a dyno. In the past I know I asked you about the torque plot and you said the person who supplied you with the dyno did not have one. Fair enough.
I don't care one or the other either really what people slap on their MSP. For my purposes the supplied intake manifold is perfectly good and mine pulls all the way to redline and low end torque is much more important to me than higher rpm performance. But that is just me.
I don't care one or the other either really what people slap on their MSP. For my purposes the supplied intake manifold is perfectly good and mine pulls all the way to redline and low end torque is much more important to me than higher rpm performance. But that is just me.
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