Pictures of MY Skunk2 Prelude h22a Manifold!!!!!!!!!!!!!!!!!!!!!!!
Please post comments!
After waiting for skunk2 to come out, i decided to make my own (fooled ya!)... althought mine was altered extensively, i'm anxiously to wait to see if all their R&R was worth **** or not ?
hope you like them, sorry for the wait guys, tried to get a good camera ended up being on a "Logitec" crappy webcam.. sorry for the bad quality i'll try to get better ones...
I will be doing a dyno session later against a ported and worked h22a butterly manifold i comparison to this one, the quality of both manifold are the same by my bare two hands.. same with the aluminum welding and finish, i'm a computer geek by trade, so for me this aluminum welding work is i think "ok".... this is my second ported manifold, first was a h22a butterfly and it works great on the car installed!!
try to spot the differences i made
we'll see how good of a Prelude h22a tuner you are 
























After waiting for skunk2 to come out, i decided to make my own (fooled ya!)... althought mine was altered extensively, i'm anxiously to wait to see if all their R&R was worth **** or not ?
hope you like them, sorry for the wait guys, tried to get a good camera ended up being on a "Logitec" crappy webcam.. sorry for the bad quality i'll try to get better ones...
I will be doing a dyno session later against a ported and worked h22a butterly manifold i comparison to this one, the quality of both manifold are the same by my bare two hands.. same with the aluminum welding and finish, i'm a computer geek by trade, so for me this aluminum welding work is i think "ok".... this is my second ported manifold, first was a h22a butterfly and it works great on the car installed!!
try to spot the differences i made
we'll see how good of a Prelude h22a tuner you are 
























oh and i forgot to add, in these pics you can clearly see how the Euro-R manifold was properly designed despite the curved radius, how the runners gently twist and turn to optimize the flow direction when going towards the head.... carefull attention must be paid how flow reacts because if not the flow could be destroyed....
just thought i'd thow that in incase you guys were wondering why the ports were tristed....
just thought i'd thow that in incase you guys were wondering why the ports were tristed....
dude, thats awesome!! Dumb question, are you leaving the top cut like that, or did you just cut it for access and are gonna weld it back??
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thanx guys,
i kinda lost some hearing out of my left ear for the grinder
AHAHHA
it took a long time to dremel out the EGR block, I also remove the AIT sensor in the front and moved it on ti`s side where there used to be a plug, i then remove the two dents on the top, that would restrict flow and cause turbulation, in the plenum area you don`t need turbulance, because it`s not subject to fuel yet, and I ported the entries and tappered them to the runners along all the way to the exits, the ports were incredibly smaller, kinda like the cutout http://www.theoldone.com has under his 2 litter buildup. it was insanely small, i take it for torque but since the h22a has lots and this is going into an EK hatch, i can lose 2-5tq for a good 5-10whp
i then cut off the fuel rail holders off a h23 manifold, and welded them on my euro, r, that`s why in some pics i haven`t had tim to mill them down to look nice and finish the polish work
been so busy i haven`t been able to work on it for a day or two...
here`s a pic before to compare of the ammounts of work.




in this pic you can see the plug on the side, the IAT sensor plug in on the front (CRV) i wanted stock locations as much as possible when i swap on the dyno, if not i would have to cut the wires and wire another sensor etc... causing swapping problem. you can also see the two dents i removed (near the top) an the huge EGR stuff i dremeled out, and welded the 4 holes that went into the manifold runners. i worked on the injector holes to where it would help flow, once i get a good camera i`ll take some zoomed in angles with proper lighting na you`ll see why these runners are delicate
when i told you this manifold barely weighed 5 pounds i wasn`t kidding
from it`s 12 pound predere..
oh and yes i`m welding the top back on it was to take pics of the work inside
hahhhaha
i kinda lost some hearing out of my left ear for the grinder
AHAHHA it took a long time to dremel out the EGR block, I also remove the AIT sensor in the front and moved it on ti`s side where there used to be a plug, i then remove the two dents on the top, that would restrict flow and cause turbulation, in the plenum area you don`t need turbulance, because it`s not subject to fuel yet, and I ported the entries and tappered them to the runners along all the way to the exits, the ports were incredibly smaller, kinda like the cutout http://www.theoldone.com has under his 2 litter buildup. it was insanely small, i take it for torque but since the h22a has lots and this is going into an EK hatch, i can lose 2-5tq for a good 5-10whp

i then cut off the fuel rail holders off a h23 manifold, and welded them on my euro, r, that`s why in some pics i haven`t had tim to mill them down to look nice and finish the polish work

been so busy i haven`t been able to work on it for a day or two...
here`s a pic before to compare of the ammounts of work.



in this pic you can see the plug on the side, the IAT sensor plug in on the front (CRV) i wanted stock locations as much as possible when i swap on the dyno, if not i would have to cut the wires and wire another sensor etc... causing swapping problem. you can also see the two dents i removed (near the top) an the huge EGR stuff i dremeled out, and welded the 4 holes that went into the manifold runners. i worked on the injector holes to where it would help flow, once i get a good camera i`ll take some zoomed in angles with proper lighting na you`ll see why these runners are delicate

when i told you this manifold barely weighed 5 pounds i wasn`t kidding
from it`s 12 pound predere..oh and yes i`m welding the top back on it was to take pics of the work inside

hahhhaha
Dude you are ******* the man. Im sorry but that is so very impressive. I dont even wanna think about how many hours youve got into that thing. That should be much better than the Skunk2. Only thing i could see doing is maybe enlarging the plemun size but that might slow down some velocity, which would be bad, but anywho i would love to see pics during this whole procedure. I wanna see what you cut and ground everything down with and how it looked when you welded it all up. Your manifold kicks ***. Oh and you wouldnt wanna do that to one if someone sent you one would you??? Let me know how much if you would. Thanks.
Your manifold looks sweet!
Did you weigh the manifold before and/or after? I would like to know how much material you took off. Larry @ Endyn claims he removed 2 lbs. from the Skunk2 which is pretty amazing if its true.
like jDmDxTuRd said, would you be willing to do this for others?
Did you weigh the manifold before and/or after? I would like to know how much material you took off. Larry @ Endyn claims he removed 2 lbs. from the Skunk2 which is pretty amazing if its true.
like jDmDxTuRd said, would you be willing to do this for others?
man that is some crazy work... it looked wild last time i saw it with the top cut off. nice work
Computer network technician by trade, working on motors is a hobby, my old man is a car tech, we have our own 4 bay shop. I bought an aluminum/stainless tig, so i can do some custom work like this....
the hardest part of working this manifold, is the ammount of mixed aluminum alloy in the mold, it's not pure aluminum, and also it's very porus (tiny air bubbles) so when you start adding or welding, the metal kinda shrinks.. and when you try to add meterial, it doesn't mix proper, so you must really work the material to make it seam nicely and look good. also the manifolding process when they used their sand manifold, you could see in the runners where there was some cavities of air and made dents... i'll try to get a better picture, as i had to port that area anyways so it was a coincidence
most of what i did, probably didn't NEED to be done, but in my case, my portflow head i received from "prospeed" had the EGR port welded on it, so EGR stuff was pointless so while i had my carbide cutter, and my ear plugs, i started dremeling it out, about 10 hours later, and sore hands i had the thing dremeled out, carefully so i didn't go through the runners and had the 3/16 thickness from the inside of the runners for strenght.
removing the EGR block from this manifold removed a good 5 pounds, i can still remove some off the flange.
the porting work in the runners took alot longer, i used an airtool, with a regulator, and custom made adjustable shaft lenghts, and special "Ends" to do the work... way cheaper than a porting kit
i'll get a better camera and you better pictures of what i see being crucial area's if you attempt your own porting... I also have access to a superflow flow bench so i will get the manifold flowed hopefully soon so that will prove how much this peice works if you guys wanna attempt the same project,
motor building is like cooking, it takes a good while to get good at it, but when you do, your reputation follows you forever
or until you stop cooking
hahahaahha.....
Gnight All!
the hardest part of working this manifold, is the ammount of mixed aluminum alloy in the mold, it's not pure aluminum, and also it's very porus (tiny air bubbles) so when you start adding or welding, the metal kinda shrinks.. and when you try to add meterial, it doesn't mix proper, so you must really work the material to make it seam nicely and look good. also the manifolding process when they used their sand manifold, you could see in the runners where there was some cavities of air and made dents... i'll try to get a better picture, as i had to port that area anyways so it was a coincidence

most of what i did, probably didn't NEED to be done, but in my case, my portflow head i received from "prospeed" had the EGR port welded on it, so EGR stuff was pointless so while i had my carbide cutter, and my ear plugs, i started dremeling it out, about 10 hours later, and sore hands i had the thing dremeled out, carefully so i didn't go through the runners and had the 3/16 thickness from the inside of the runners for strenght.
removing the EGR block from this manifold removed a good 5 pounds, i can still remove some off the flange.
the porting work in the runners took alot longer, i used an airtool, with a regulator, and custom made adjustable shaft lenghts, and special "Ends" to do the work... way cheaper than a porting kit

i'll get a better camera and you better pictures of what i see being crucial area's if you attempt your own porting... I also have access to a superflow flow bench so i will get the manifold flowed hopefully soon so that will prove how much this peice works if you guys wanna attempt the same project,
motor building is like cooking, it takes a good while to get good at it, but when you do, your reputation follows you forever
or until you stop cooking
hahahaahha.....Gnight All!
nice job Gilles! I hope all my stuff works out good for you! Looks like u spent alot of man hours on that manifold!
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VisualAutoMotoring
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Aug 3, 2004 02:46 PM



Nice work though!!

