Mike

I reinstalled my intake manifold...big deal right??
Notice anything about the appearance and texture of the runners and inlet from the throttle body? Smoother than a babies butt wouldn't you say?







I sent it off to Extrude Hone and had it run through their Abrasive Flow Machining process (total is ~$560 +shipping). I was going to get the heads done as well and in fact we pulled everything off, but my mechanic ran out of time so at this point in time only intake manifold has been EH'd. More about EH at the bottom. I didn't order the flow rate numbers because that was an extra $125

The car definitely feels faster and I'll have to schedule a dyno asap. I'm getting some torque steer that I've never had before too.

I'll post the before pics tomorrow but you can see some of the pitting and rough texture esp in the last pic.

If you're thinking about having this done make sure to use the PA facility as they are true professionals.


http://www.extrudehone.com/automotiveoem.html

Extrude Hone invented the Abrasive Flow Machining process nearly four decades ago and developed an entirely new kind of finish machining tool. A plastic, abrasive laden polymer, with special rheological properties allowing it to selectively and controllably abrade surfaces that it flows across. Extrude Hone created an array of processes that employs this special pliable abrasive "tool" to meet a variety of production objectives. Today, the Extrude Hone AFM process plays a critical role in dozens of industries. Its applications range from ultra-pure, fluid handling components for semiconductor fabrication and medical applications, to high-performance fuel and air passages for automotive, diesel, and turbine engines; and further, to high precision tools and dies.
The Extrude Hone commitment to innovation is stronger than ever. It is reflected in a multi-million dollar R&D budget aimed at making Extrude Hone processes more precise, dependable, versatile and productive. As a result, new machines and processes have emerged. They include Orbital AFM, 3 Dimensional Printing, and Electrolytic Machining.

KavexTrax

any before pics Mike?

btw, that is smooooth

tw1112

nice pics mike! That looks great!

mattg

very nice, wish it wasn't so much $.

how long did it take?

azts664

tha fuck is that?!?!?!?!?

hornyleprechaun

look great...even though i have no clue what they looked like before...but they sure do look smooth

CL'S

Mike

Kvit, I've got a few more pics but those are the best ones.

Thanks Tommy!!


Matt, 10 working days.

Atzs, that's the intake manifold.

Lep, I'll post some before pics later today.

Zapata

hmmmmm man this sounds very appealing. I would love to see the dyno

xenon7

....worth a few more hp I'd say.

looks good- lets see how in intake air likes it.

keep us posted!

typeR

so what prompted this mike? getting scared that im gonna have a faster car than you ?

Juker008

So whats the going HP increase, like 15%?


Juker008

Mike

Zapata, track and dyno coming real soon now

xenon7, will do! I definitely pulls much harder.

Steve, I'll always be faster than you. :P

Juker, the butt dyno says *maybe* 15 hp and *maybe* 10 ft lbs

jimcol711

what kind of car do you have??? you have no signature showing your car/mods

Zapata

wow, 15HP/10ftlbs? The heck with RES.......... Oh mike please let this be true!!

JRock

Modmole did this like a year ago and came away with excellent gains. I would say it's going to prove worthwhile, it's just expensive.

I inquired about this myself several months ago but was quoted a similar price and didn't have that kind of money and couldn't just ship out parts of my car for a few weeks, so it never was done.

Zapata

geeze, did the modmole have everything extruded or just the intake runners?

JSuppi

OK this might be a really stupid point, but if you had this done how long aproximately would the finish last before the intake runners got dirty and/or pitted again [especially with the cold air intake and apparently the poor filtrations those K&N's do] (probably wouldn't happen for awhile at least..but i'm thinking it would eventually happen??)

I guess the initial advantages are positive, but for how long???

Sorry about my ignorance on the process...

Zapata

extrude/hone isn't cleaning. THe process smoothes out the metal to make the surface smooth for better airflow.

hughesne

Whats the cost of something like this? And does it void the warranty? 2 concerns we all have with every type of mod.

Zapata

$560 +shipping

NOt sure about the warranty by Acura but i'm sure that this place has something...... Mike, care to comment??

Mike

Jim, 01 CLS with h/i/SSRs and now an EH'd intake manifold

Zapata, I'll get it dyno'd w/i the next few weeks and you'll be the first to know.

JRock, I talked to Chris about what he did. If I remember correctly he didn't actually have EH do the work. I believe he just had the throttle body done, but I could be wrong.

John, what Zapata said. Their process actually is really a series of processes. They start by running a very gritty putty through the manifold to smooth out the corner and roughness. They use less and less 'grit' in their putty until the manifold is smoothed out.

hughesne, $560+shipping. Warranty may or may not be voided. If you think about it all you're doing is cleaning things up just like the headers...so....

ZmZmCar

Can upi explain the reason for doing this and why is smooth better??

I don't know much about engines so I am trying to learn more.

Thanks.

Zapata

smoother air flow = more efficient = more power

scalbert

Way to go Mike, I loved seeing those pics earlier and can't wait to see a dyno. Did you ever get the low manifold inlet runners done??

But thanks, you have now comdemed me to spending the weekend in my garage with the air tool and cartridge rolls up to about 400 grit... I'll try to get it polished to a mirror surface along with the outlet of the TB. BTW, how are the gaskets when removed, do all or certain one's need to be replaced??

Thanks fpr the post finally, I've been waiting to see it!!!

JRock

I never knew ExtrudeHone was the name of the company - I've always known it as the name of the process - as in "I had my intake manifold extrudehoned. Which is what Modmole said he had done and had good gains from.

Also, it really can't void a warranty as all you did was help smooth the flow of air - it's almost not possible to call it a "mod" since it's really just smoothing what's already there.

NOVAwhiteTypeS

yes just like blue printing yo engine. not really a mod but rebuilding to exact spec for better performance w/out changing anything.

astro

dyno that ish Mike, you're killin me!

scalbert

Don't leave me hanging, JK.

When you get a chance please let me know what the gaskets are like. Can they be reused or should I just order new one's. BTW, I only have 2500 miles on the car.

It looks like the end chambers use rubber gaskets which should be fine. I'm really curious about the upper to lower manifold gaskets and the lower manifold to head gaskets.

Again, those flow channels look great!!!

GOT PSI?

Mike, that's some hardcore shit!!

quikcls

change the gaskets!

scalbert

They will most likely be changed. But there are often some, like the end chambers, which never see anything other than air flow and are rubber. With limited mileage, in my case 2500, it may not be nessesary.

I feel the upper to lower gasket is questionable as it might see some EGR gases. The lower manifold to head gasket is basically a must.

TheModMole

Mike/Scalbert:

Great to see you guys going "in deep" to squeeze free a few horses What I had done was very similar. If you really want to maximize the effects consider an AFC either Fields or Apex-I (I'd avoid the VAFC altogether at this point - Long Story) I wont go into the dirty details if increased intake velocity/charge/etc... Scalbert can explain it 10x more effectively then me If either of you had a windfall on the order of magnitutde of $1800 AEM EMS will really help out here... granted the tuning costs are upwards of $500 but "allmotor" is a beautiful thing

Mike

Steve, I didn't get the lower intake runners done. I know a guy who builds racing engines and he said to leave the runners after the injectors rough to better atomize the air. Plus I didn't want to wait another 2 weeks to put my car back together again. My car has 26k+ miles so I replaced all of my gaskets. YMMV but all of the gaskets are pretty cheap. Portions of my gaskets were a some what crushed so you'll want to look at them very carefully.

http://www.acuraautomotiveparts.net/...NIFOLD+%282%29


Robb, ok ok!!! I think it's racing season for the guys at my dyno shop so I have to wait.

PSI, that's nothing if I'd had the time I would have sent the heads in!

Chris, thanks for chiming in! Care to give some details on 'similiar' or are you going to continue in your secretive ways?
The EMS would be great but I'll allow Steve to pioneer that one!

Zapata

modmole,
Did you ever dyno after your extrude/hone???? 1/4 difference?

TheModMole

I had a full polishing and port matching done.

Zapata,

I did have dyno's done, but if I *hypothetically* told you 267hp and 241lbs (headers/intake/vafc/plugs/exhaust/extrude/IAT/EGR/O2 mods) how quickly would a flame war ensue afterwards? Or how many ppl would call bullshit on ANY dyno's posted.... you guys know what Im talking about... everyone finds their own path... enjoy your cars I got sick of defending and proving what/how/when/why etc..... to certain resident pricks... btw, a few ppl here have the dynos and mods along with some other FAQS if they want to chime in they can feel free to...

Mike

Here are the before pics

Juker008

Whats the story with the VAFC I heard that some people were getting problems from teh dealer when they found that they had a VAFC, why?


Juker008

scalbert

I ended up waiting to do this until I get the gaskets. I didn't want to end up without a vehicle and since my wife took the day off (we work together) I felt it would be better to wait. I'm going down to the dealer during lunch to get the gaskets on order.

I hope to begin sometime this week.

Thanks for the before pics, you can see how much improvement potential there is.

TheModMole

Juker:

The VAFC will give you greif from the dealer because it requires you to *cut* into the factory wireing harness to/from the ECU/PCM. The dealer will not like that one bit.. and in the long run they would have to honor warranty claims unless they can *prove* that the vafc caused a particular failure. Aside from that on the CLS I went through 3 differ4ent units, and on this car I had nothing but problems with the ecu/pcm compensating for correction factors fed into the VAFC... ultimately the VAFC and ECU went to war and kept throwing DTC's (Vtec system failure) and the gains were minimal...

Juker008

Ok so what about the VTEC controler?


Juker008