BOV and IC Piping suggestions wanted

[Bossman429]

So theres been a lot of talk around here lately about BOV's and how they can help and prolong the life of a turbo.

So I'm thinking about jumping on the bandwagon on this one.

 

Are you guys running BOVs using the stock (or not stock, but still chip controlled) Boost control features of the TGP ECM, or are you going the aftermarket boost controller route? Does it cause any ECM problems running a BOV with the TGP ECM (TG160 equiped of course)?

 

I think I will just get a 1g DSM for now, but have heard people not liking them because the vent at partial throttle.

Looking at Jegs and Summit, it appears that the only alternative is going to cost at least about $120. Can anyone recommend a BOV that they like, for a decent price ( $150 or less)? I'm not sure how to tune or set one up either, so things like ease of use and setup would be relatively important.

 

I think I will go the lower IC pipe route for mounting, as I have seen them in both pipes, but the lower pipe closest to the source of boost makes the most sense to me. It would also make the thing less visible from under the hood.

 

Now for IC piping questions.

I don't really want to butcher up a set of TGP intercooler pipes to run this set up. Unless I can find a set on Ebay, or if anyone here has a set they would be willing to sell. I want to be able to return to stock if ever needed.

 

I considered having some aluminum piping bent to fit my application. I figured I could head to a rice shop in KC to get it done, unless someone can suggest otherwise. I will probably take the IC pipes off of my 2nd TSTE (Shhhhhhhhh........no one here knows about that yet) to get new ones made so I can still drive my car while getting some pipes made.

 

Also, does size matter with IC pipes? Should I go with the same diameter as the stock TGP IC pipes? Will bigger pipes decrease boost pressure, and or increase lag?

Will smaller IC pipe do the opposite? I noticed on the Pikes Peak TGP posted on Jeff M's website, and mentioned otherwise that the IC pipes look slightly smaller than the stock TGP pipes.

 

Suggestions wanted, and thank you for reading......

 

Now....Discuss!

[Garrett Powered]

I don't know about the diameter on the Pikes Peak Racer. but I got another lower IC pipe and will be testing that with this Turbo xs Type S (1-12 psi). I got to weld the flange on see if it works. give me a couple of days to get it set up and I will let you know.

 

Others have done it too but every BOV is different so you never know till you try.

 

 

I might go with the HKS with the big snap-ring flange.

[TGPilot]

There is ZERO sense to having multiple sized IC piping. You are doing nothing but causing flow turbulance when it goes from large to small to large or visa versa! I have never heard of anyone getting more flow out of a TGP with larger piping and using the stock intercooler. The intercooler with larger than stock IC piping will create a bottle-neck/restriction at the intercooler. Unless you plan to go with a higher flowing intercooler it will do you no good. Then with a higher flowing intercooler and piping you will need a larger turbo because the T-25 is tapped out on efficiency as it is!

 

A 1G DSM BOV is more than adequate for a TGP setup. It does make a metallic flutter noise...but who cares. At least you know it is opening and closing properly. Plus they can be had for $20 or $40 with the stock DSM piping to get your flange.

 

The ECM could care less if there is a BOV on the charge piping or not. It causes ZERO conflict.

 

I do not know if you are eluding to this on your post...but a BOV has nothing to do with controlling boost. It merely allows the pressure in the charge piping to escape when the throttle body butterfly is slammed shut.

 

Don't waste your money on some high zook BOV! A 1G BOV will work just fine! 8)

[Bossman429]

Thanks Kenny,

Yeah I just wanted to answer a few ?s before I go and start spending money.

 

You are right about the piping issue, I didn't think about it before, but yeah anything larger is just going to cause a bottleneck at the IC. Shinny Aluminum would sure look nice though, I might look into getting a pipe made with a 1g flange on it, just cause it might look nicer, have to check around KC to see if anybody does that sort of thing.

 

So, my car already has a flutter when the throttle is closed, but that is the wastegate actuator. The blow off valve will "blow" at the same time correct?

A BOV releases the unused air charge between the turbo and the Throttle body, but what exactly does the wastegate do? I've read descriptions on the board but still am confused on exactly what it does. All I know is that I hear a flutter off throttle ever since I put the K&N on.

[Bossman429]

Optional Turbo Features

 

The Wastegate

Most automotive turbochargers have a wastegate, which allows the use of a smaller turbocharger to reduce lag while preventing it from spinning too quickly at high engine speeds. The wastegate is a valve that allows the exhaust to bypass the turbine blades. The wastegate senses the boost pressure. If the pressure gets too high, it could be an indicator that the turbine is spinning too quickly, so the wastegate bypasses some of the exhaust around the turbine blades, allowing the blades to slow down.

 

 

So I get what this all means. I understand how it works in theory, just not mechanically. I need to see a pic or something.

So is there a like door, or flap that opens up via the wastegate actuator rod that just flips open and pushes exhaust out the DP and not through the turbine?

 

If so then what is the flutter sound when I let off the gas. I know it is the wastegate working, but why does it make the noise, and how. What within the wastegate system is making this noise?

[LukeZ34]

I've got a 1G DSM BOV on my TGP, so if you can remember what it sounded like at the track, that's the same sound yours will have.

[Guest TurboSedan]

 

So I get what this all means. I understand how it works in theory, just not mechanically. I need to see a pic or something.

So is there a like door, or flap that opens up via the wastegate actuator rod that just flips open and pushes exhaust out the DP and not through the turbine?

 

yup, the wastegate will vent exhaust gasses before they have a chance to spin the turbine even faster which is how it regulates boost pressure. it doesn't matter what type of boost controller you are using; ECM controlled or manual boost controller. i myself am using a $25 grainger valve MBC from M&M Racing.

 

If so then what is the flutter sound when I let off the gas. I know it is the wastegate working, but why does it make the noise, and how. What within the wastegate system is making this noise?

 

that flutter noise happens when the throttle bladed close, all of that pressure goes back to the compressor wheel and slows down the compressor wheel real fast. even only running 4-5psi on my Cutlass, i can very audibly hear that flutter noise and i cringe everytime i hear it. it's even worse on my GTS because i don't have a BOV on that car at the moment and i'm pushing 14psi in that car. a BOV will prevent this of course lengthening the life of the turbo and it's a cool noise maker as we all know. on a car with a manual transmission, a BOV will even help keep the turbo spooled between shifts. i will be taking my TGP lower intercooler pipe to a local shop tomarrow so i can get my ATP adapter welded up to the pipe. i will be going with an ATP modular BOV as well because i like how they sound and they are easily removeable, you can use different small/large air horns etc. i don't particularly like the 1g DSM BOV because like you mentioned it vents at part throttle...it makes noise damn near all the time :? it was kinda cool at first but it gets old quick. i do have a 1g DSM BOV but i will probably sell it. i do agree that the 1g DSM BOV will be perfectly fine on the TGP, as practically no one is pushing boost levels past 15psi...past 15psi the 1g DSM BOV might not be so good without modifying it. i'm mainly going with the ATP modular BOV for it's sound but it does have other advantages.

 

i will post pics of my BOV setup later this week along with a vid w/sound 8)

[Bossman429]

i will post pics of my BOV setup later this week along with a vid w/sound

Awesome! Thanks Josh I was just about to ask you to post a pic of the lower IC pipe with the BOV on it.

I am slightly unsure of how to weld the flange onto the TGP lower IC pipe, so a pic would help.

Do you just cut only the flange off of the donor DSM pipe, and drill a hole in the TGP pipe, and weld it on?

Or Do you just use a section of the DSM pipe and cut the TGP pipe in half and weld the section of DSM pipe with the flange on?

 

If you would be willing to sell that DSM BOV I would consider buying it from you. As long as you have a flange to go along with it.

I'd be willing to pay a fair market price so as to not have to deal with some of the douche bags on Ebay.

[Bossman429]

I don't mean to be hounding you guys with questions, but I am the kind of guy who likes to go into a project knowing EVERYTHING that I can possibly know. It helps me to avoid mid project snags that interupt my stress relieving Fri and Sat night cruises.

Soooo.....

What does it mean for a BOV to be "crushed" as it seems that most Ebay BOVs are listed as "uncrushed" I would imagine it is some sort of mod for higher boost applications. Recommended for TG160 levels of boost? or a waste of time?

 

Also I was looking at an old post where iTurbo gave this URL for a 1G BOV mod for high boost applications. It supposedly elimitnates the leaky BOV problem or something like that, but only at high boost?

http://www.thedodgegarage.com/turbo_bov_mod.html

Again, Recommend this, or a waste of time?

 

Also noted on that page is that he recommends using a filter of some sort on the end of the BOV outlet. Do most of you guys run one as well, if so where did you get yours.

 

I know I'm probably putting way too much thought into this, some of you are probably saying: Just shut up and put one on already! I gotta know EVERYTHING first!

That is all for now...

[LukeZ34]

I was gonna post a picture of mine, but it looks exactly like davis's does.

 

A 'crushed' BOV simply means it has been slightly crushed in a bench vise to hold higher boost levels. That's usually required if your planning on running over 18 PSI, so it's nothing you should have to worry about doing.

[Bossman429]

OK thanks Davis

That pretty much answers my mounting questions. Looks like you just drill a hole in the IC pipe and mount the flange to the pipe. Cool. Sounds easy enough.

 

I assume you painted that pipe, what kind of paint did you use?

I want my pipes to be close to the factory black, but I'm not sure if it's just a gloss black, or more of a satin black.

 

Thanks!

[Bossman429]

A 'crushed' BOV simply means it has been slightly crushed in a bench vise to hold higher boost levels. That's usually required if your planning on running over 18 PSI, so it's nothing you should have to worry about doing.

I should certainly hope not

[Garrett Powered]

so does the ATP have a 1 inch flange like the 1g dsm? or the snapring.(TurboSedan)

[no1kicker]

http://www.w-body.com/forum/viewtopic.php?t=27787

 

Had this on for a bit, sounded good.

[TGPilot]

Here is a BOV with super sound for you!!!

 

http://videos.streetfire.net/Player.aspx?fileid=F7CC1451-A1E1-4A4E-A850-8D62DAE06131&kw=32&p=0

[Nick1234]

Here is a BOV with super sound for you!!!

 

http://videos.streetfire.net/Player.aspx?fileid=F7CC1451-A1E1-4A4E-A850-8D62DAE06131&kw=32&p=0

 

That is awesome.