Blowoff Valves

[aaronm_2003]

I just bought a 1998 Eclipse GST and was thinking about purchasing either a TurboSmart Megasonic BOV, or a Turbo XS RFL BOV. But the XS RFL says "designed for engines running 10-25 psi boost." Can the engine handle that one, or should I opt out for the other one, if either. Ive drove a big truck all my driving years, so go easy, i'm new to this car stuff.

 

[boostaddictgsx]

The BOV's you just listed are designed to vent to the atmosphere, so unless you have a blow thru system, just spend like 30-40 dollars for a used 1G BOV until you get to the point where you want to vent.

 

[TurBoGs-T]

I would go with the 1g bov also, at least until you learn a little bit more. With the two you named you MAY run into some problems with venting.

 

[clownface]

just so ya know, your engine is running 10 or so psi stock and 25 psi is childs play for a 4g63...well maybe not childs play but ya get what im saying. When looking for a blow off valve what ya wanna look for is something that can hold the amount of boost you wanna run without leaking and something that can hold a good vacume and maybe what it sounds like or looks like if your into that. Venting is when the air from the BOV dosnt go back through the intake, the way intake is setup with the stock MAS its prolly a better idea to not vent. You can get a HKS with a kit to not vent it and you can do the same with a GReddy type-s but i think you can just use the stock hoses for the GReddy and im sure theres others you can recirculate, you could always get a 1st gen BOV for really cheap.

 

[14.5 drift]

1 gen bovs do the job fine. Good for 20-23ish psi for about 40 bucks on the trader.

 

[DSMNightmare]

No matter what BOV you go with make sure it has the option to recirculate. IF you choose to vent and the car runs like ass because of it you can always recirculate. Like they said though you can't go wrong with a 1G BOV.

 

[aaronm_2003]

What type of BOV would you guys sudgest if i wanted both function and sound from the BOV?

 

[czech09]

just get the 1g bov man seriously that's your best call the greddy type s is nice too though if you wanna invest a little more but you'll like the sound of one then again the sound of another so for now get the 1g and as you progress with your modding and get better @ stuff then buy a better one

 

[DSMNightmare]

The Greddy Type S is your best bet because if you like sound it will sound good recirculated as well. I have the HKS and it makes zero noise recirculated.

 

[aaronm_2003]

Alright, the GReddy Type S looks like it will do fine for me. Thanks for the help.

 

[Thomas91169]

hit up ebay if you are interested in the greddy type-s, cause you can find the bov and intercooler piping for around 250$, which 250 is the price of the bov alone from most venders. and the upper IC piping will help free up some air flow into the engine. ebay is your freind.

 

[aaronm_2003]

If I were getting the stock BOV from a 1g to pu ton my 2G, do I have to have any welding done to it or is it just a direct replacement type of thing?

 

[olmytsi]

a 1g bov will not bolt up to ur stock upper intercooler pipe. Anyways, i strongly recommend u replace the stock upper intercooler pipe because it has a huge restriction right by the airbox/fuse box. I got a dave brode upper intercooler pipe with a 1g bov for 115 and if u r worried about loudness, just get an injen intake pipe or similar metal pipe which will amplify the sound of ur bov.

 

[Omega]

There is another option that a lot of people might like. There is a company called Go Fast Bits that make a BOV that vents AND goes back into the intake. That way you get the best of both worlds. You will have to custom make a flange and weld it to the intake pipe, but that isn't hard.

Check it out:

http://www.gofastbits.com.au/index.php?parentid=products&option=products&sub_option=bovs


From the look of their site, they are in the process of making a DSM version.

 

[paranoidTSi]

If you want noise and function, then get the TurboXS RFL blow-off valve, and a S-AFC that way you can adjust the fuel/air mixture so it is not off like it would be if you vented on a stock system.

Although, frankly I have not had any problems venting on my car, idling or performance wise.

 

[olmytsi]

some cars tolerate it but most don't.

 

[DSMNightmare]

some cars tolerate it but most don't.

That is a generalized statement based on hearsay.

 

[guitarXgeek]

I guess it just depends on what your definition of "tolerate" is. If by tolerate you mean that you can't actually FEEL anything, then sure. However, it's a fact that it's not good for the car

 

[DSMNightmare]

I guess it just depends on what your definition of "tolerate" is. If by tolerate you mean that you can't actually FEEL anything, then sure. However, it's a fact that it's not good for the car

Where is your data that shows this? I don't mean a link to another thread saying it either. It's a fact that there is no gain from it but I would like you to show me hard data showing it's bad.

 

[guitarXgeek]

Lol, I didn't say it was "bad", I just said it was "not good". Two different things there By "not good", I meant that it will run pretty damn rich, which is obvious by the big poof of smoke coming out the exhaust when you shift gears

 

[DSMNightmare]

I don't get that at all. Don't get it at the track, dyno, or anywhere else for that matter. Also I see plenty of DSMs that recirculate and give puffs of black smoke or run rich. I've seen guys run bad with vented BOVs and I've seen guys run fine with vented BOVs. That's why if you choose to vent you should at least give yourself the option to recirculate. I'm going to recirculate now but I ran for three years with zero issues.

 

[guitarXgeek]

That's fine, I'm not trying to prove you wrong, just trying to point out some facts here If you vent (on the stock MAS), then you are letting out air that has already been accounted for. Therefore, you will run rich. Can't argue with that.

But like I said above, some people may not get the big puff of smoke (I sure as hell do when I take off my recirc hose!), or feel any performance loss, but it's still there, and that's a fact!

 

[DSMNightmare]

That's fine, I'm not trying to prove you wrong, just trying to point out some facts here If you vent (on the stock MAS), then you are letting out air that has already been accounted for. Therefore, you will run rich. Can't argue with that.

But like I said above, some people may not get the big puff of smoke (I sure as hell do when I take off my recirc hose!), or feel any performance loss, but it's still there, and that's a fact!

Your using a 1G BOV and honestly I've never seen anyone have any luck venting those or the Type S. The only ones I've seen run vented and the car not run like ass are the Blitz, HKS, and Apexi. There may be more and there may be instances where people have had the above mentioned valves and the car ran bad. That's why I say leave your options open.

 

[tsi4ya]

yeah take it from mee i just bought a greddy type s and well vented it sounds soooooooooooooooo oo nice BUT i knew better to do that. . well they guy that gave me the hook up (74 bucks!) thought it would be better to vent it. . so i thought okay what the hell ill just do it for now and not vent it later. . .welll i vented it the rest of the day and well. . .later on that night a cuple of friends wanted to hear it soo i took of the pipe and vented. . . and it was nice! BUT it let out a crapooola of smoke. . and is the cause of what was said earlier tooo rice i believe. . . we type s you hear bearly. . .hahah i dont know much about the 1g bov but good luck with your search i can say that we are here are like a family of DSM . . .just here to try to help.

 

[guitarXgeek]

Your using a 1G BOV and honestly I've never seen anyone have any luck venting those or the Type S. The only ones I've seen run vented and the car not run like ass are the Blitz, HKS, and Apexi. There may be more and there may be instances where people have had the above mentioned valves and the car ran bad. That's why I say leave your options open.

I've heard of that as well, but that really just does NOT make any sense whatsoever to me. If you would kindly explain that to me please