I thought about this too. I was think of thiefing some ceramic media (about 1/8 diameter) from work. Then, fill the intake to about 3/4 way full. Cap off both ends. My friend has an old paint shaker and prolly gonna mount it on that. I'd really like to get another intake from a boneyard but nobody is wrecking their spi focus around here so...

Go to google and type "TUMBLING MEDIA". Alot of good info on the type you need.

 

Has anyone priced out the extrudahone method?

 

I'd really like to get another intake from a boneyard but nobody is wrecking their spi focus around here.

Check the Ebay section, last post. Courtesy of Andreb.

 

From the few pricelists i've seen from different places on the net it looks like it would run around $400 to extrude hone an intake manifold and $600 to do a head.

Not bad of an idea muttlee.....hmmm.

 

i am sure that they did not mention what kind of gains could be expected from that process. Any idea?

Tring to get a Hp/$ figure. I like the extrud method, but if the gains aren't there then forget that.

 

THANX H20!!!!

 

i am sure that they did not mention what kind of gains could be expected from that process. Any idea?

Tring to get a Hp/$ figure. I like the extrud method, but if the gains aren't there then forget that.

From what ive researched, on a 4 cylinder, the gains can be anywhere from 5-15 hp. Most cars average around 10-12 hp increase looks like. The worse the manifold is stock the bigger the gain. Also, it seems the more bendy and complex manifolds gain more hp than a fairly straight manifold because the smooth surface finish helps to keep the velocity up around the irregular bends. With that being said I would think it would really help our manifolds out. One more thing the process does that I really am intrigued by is that it helps equalize the flow to all the runners in the manifold. The more restrictive one runner is, the more the media will cut at it thereby equalizing flow in all the runners. The more equal you can keep the flow to the cylinders on a high hp motor the better it will run and higher hp output you can have. For a mild-moderate Na buildup I wouldn't consider it but for a high boost app I would. The more I research it the more I'm thinking I might try it. I'll just try and work some overtime and ebay more junk to make up for it. The amount of time I would have to work to pay for it would be alot less than if I went ahead with my original plan to make a custom manifold and I know it would come out ok. Just wouldn't flow as good probably.

My concern is keeping the bottom end touque and I know that without radical headwork and intake mods that isn't happening.

 

sorry, I missed this thread somehow.

The beads are shot by way of a high pressure gun like a sand blaster. The idea is that you fill the manifold with the beads and bring them up to pressure with the gun. Its a sealed recycling system. The beads fill the manifold and make their way thru it. When something slows it down, it gets worn off. Theoretically, you could dissolve the manifold. But its much more subtle than that. like the flow of water (pre waterjet of course

) It relies completely on physics and nature. Alot like Kung Fu.

 

So where did you get it done and how much? It sounds extremely similar to the extrudehone setup.

 

the second method that is more readily accesable (the other method is hard to find as the equipment is new, large, and expensive) is to use high pressure air mixed with a small amount of sand. You pressurize the manifold and use this gritty mix to polish the areas where the air flows naturally. This is not as efficient as the other as it only polishes within the confines of the original design whearas the other method polishes everything and creates a new flow pattern.

 

So, in theory, I could take the sandblaster at work and go for it?

 

No, not really. That's why I couldn't understand when he said bead blasted. Sandblasting would be too pinpoint and not enough volume. Sounds like txfo's first technique is roughly the same as the extrude hone and that pretty much fills the whole thing up with media and goes through again and again and again to smooth out the ports. Unless your sandlaster had a nozzle the size of one of the intake runners, ( imagine getting blasted with that thing @175psi!!

) I dont think it would work.

 

Dear Brad,
Thank you for your recent inquiry. Rick Miller says the cost to process
your intake manifold is $485.00 plus shipping.
If you have further questions for Rick, he can be reached at
1-800-613-1065 or reply to this email.
Sheila Rothwell
Marketing Department
Extrude Hone Corp.

Dear Brad,
Yes we can do a group discount, however it takes 6 or more of the same
application to qualify for a group discount.
Sheila Rothwell
Marketing Department
Extrude Hone Corporation

What about a flexible ball wheel cylinder hone??

 

Please do not advertise in the forums. Thank you.

 

Might as well extrude hone it, but another option though!

 

i'd do most of it with a small engine cylinder hone, for places impossible to hone, i'd go with the "abravice beads and paint shaker"

 

So, in theory, I could take the sandblaster at work and go for it?

take that idea and turn it inside out.

seal off 3 of the runners and use a high pressure vacuum on the open runner. use a hose to connect the TB port to a box of sand/glass/whatever that has a vent in it.

The vacuum will pull the sand air mix thru the manifold and polish the areas that the air flows naturally. repeat the process for the other three runners.

 

aight how much does this sand/glass/whatever blast cost?

I think that this mod combined with the race header makes a hell of a gain

 

The odds that you're going to pull this off in your garage are slim to none. The cost of getting an extrude hone done professionally is more than just getting a custom intake mani made. I would just get a custom one made. Well I did acutally, gets here wed.

I know I don't have an SPI but I see no reason the guy who did mine couldn't do one for you guys too.

 

The extrude hone will flow better then your custom manifold will for it's size

 

It might flow better but mine will make more horsepower, that's for damn sure. Smoothing out and improving the flow of overly long intake runners still leaves you with overly long intake runners.

 

It might flow better but mine will make more horsepower, that's for damn sure. Smoothing out and improving the flow of overly long intake runners still leaves you with overly long intake runners.

Just up and buying a new intake manifold like that is not gonna net you the gains you really want. Hell...look at what was installed on dj_kurruptions car. When the new IM and TB was installed the gains were very small compared to what we thought we would get. I really think you should have gotten the port and polish WTF before you did the IM because you already have the 2000 IM.

Gabe

 

The "overly long" intake runners create torque, The only thing we have to hold off the competition as far as I'm concerned. Without our torque advantage we have nothing.

 

well, to be clear.... long runners create more torque down low. Shorter runners move it higher up. Going too short can move it up out of reachable RPM. It dosent take a whole lot of trimming to shift the curve up into the 10000 rpm range.

The proto DSIM ran into this problem quite early on. Math OWNS ME

 

Just up and buying a new intake manifold like that is not gonna net you the gains you really want. Hell...look at what was installed on dj_kurruptions car. When the new IM and TB was installed the gains were very small compared to what we thought we would get. I really think you should have gotten the port and polish WTF before you did the IM because you already have the 2000 IM.

Gabe

I won't just be throwing it on though, this will be in conjunction with a custom SCT tune and dyno tuning. I'd bet dollars to donuts on at least a 10hp gain, and there are no dyno charts to this day that show a gain for the 2000 manifold that high. It's worth it to me.

With the nitrous it's nice to have a metal manifold in case of a backfire at the track too. I'm also wondering if the short runners will help deliver the n2o more efficiently/evenly also.

Aw hell, I just wanted to bolt a new part on, who am I trying to fool