3SGTE: Which BOV?

[Ben]

^ Unplug the 1 vacuum line and remove the one 12mm bolt that holds the valve on with a wrench.

[mr2corydsm]

thank you

[ACD]

I had a Blitz DD on my WRX for a week or two, and it didn't run proper. I researched it and knew what it was, but it wasn't worth it to put the stock one back on for a week or two. Loved the sound but realized I'd spent $75 on something completely aesthetic when I could have bought something else. I sold it for $150 on craigslist, made a buck, and had my fun with it. IMHO, it was worth it.

So if you're going to buy one, buy it cheap, buy it used, and keep your stocker around. Its fun and worth it for awhile, but you may find one day that its not as fun as a little more driveability. In any case, its not a huge difference.

[MR2SW22]

i had a HKS BOV on my 91 JDM 2nd gen 3s-gte, and i fell in love with it. not once did it stall, not once did it cause any problems, what actually did cause a problem is when i hooked up the stock one and tryed to vent it. it would boost to about 5-6 psi and then the BOV would open up on it's own before i took my foot off the petal. then again i was 17 years old and it was mostlikely user error when i installed it. i think i messed up the vac lines i dunno it was like 7 years ago, and now i have a stocker on my 3rd MR2 and i want an HKS again. unless someone can tell me how to safely vent my stock one?

[fidget]

I've looked through this and a few other posts regarding bov's and bpv's and most of them seem to be about the 2nd Gen engines. On a 3rd Gen which lack a MAF would you still have the running rich problem?

[Sang]

Originally Posted by fidget

On a 3rd Gen which lack a MAF would you still have the running rich problem?

No.

[MR2SW22]

Originally Posted by Sang

No.

sang is correct. the air reading is done at the throttlebody, not before the turbo, so the air that the BOV lets out goes out before there is a reading for how much air is getting into the motor. true story my bro's all-trac had a 3rd gen swap, and he had a Blitz DD bov, sounded cool and worked great. but now i have a question for you sang, how is it that my all-trac with a stock 2nd gen 3s-gte didn't have any bov or bpv on it at all?

[3sgtepower]

I think the money could be better spent towards making your car faster than making it slower with an aftermarket bov, for all you gen 2 owners on stock ecu.

Of course, if you have a 3rd gen, it shud run fine with an aftermarket bov as long as it works properly and doesnt leak. I have both, an early model HKS bov that works perfect and a $250 HKS SSQV. I hated the more expensive HKS SSQV's sound, it sounded like a mouse squeak (squeeek!!!)and would let off no matter how low I was in the powerband (car ran like shit), where the early model sounds good but nothing too ricy, kinda like a sneeze.

[MR2SW22]

Originally Posted by 3sgtepower

I think the money could be better spent towards making your car faster than making it slower with an aftermarket bov, for all you gen 2 owners on stock ecu.

Of course, if you have a 3rd gen, it shud run fine with an aftermarket bov as long as it works properly and doesnt leak. I have both, an early model HKS bov that works perfect and a $250 HKS SSQV. I hated the more expensive HKS SSQV's sound, it sounded like a mouse squeak (squeeek!!!)and would let off no matter how low I was in the powerband (car ran like shit), where the early model sounds good but nothing too ricy, kinda like a sneeze.

by stock ecu do you mean if i hook up my AFC2 and tune it the BOV shouldn't make the motor run rich when i shift?

[redsled]

i used to have a gen2 and went to the dyno to see what the difference was with the bpv to atmosphere or recirculated and let me tell you RECIRCULATE IT!!!
mine never stalled but when i dynoed them this is what i found

when vented to atmosphere i lost 35whp at redline and 50wtq over 1500rpm in the midrange

that is a huge difference in the end a stock jdm gen2 with exaust and a filter and 15 psi made 235whp and 260wtq

[Sang]

Originally Posted by redsled

when vented to atmosphere i lost 35whp at redline and 50wtq over 1500rpm in the midrange

Then something else was non-functioning in your setup that was eventually inadvertently fixed in between, or your BOV was leaking. Whether it's vented or not has NO effect with on-throttle performance. Once you're in the throttle, the BOV should be completely shut...

[MR2SW22]

Originally Posted by redsled

i used to have a gen2 and went to the dyno to see what the difference was with the bpv to atmosphere or recirculated and let me tell you RECIRCULATE IT!!!
mine never stalled but when i dynoed them this is what i found

when vented to atmosphere i lost 35whp at redline and 50wtq over 1500rpm in the midrange

that is a huge difference in the end a stock jdm gen2 with exaust and a filter and 15 psi made 235whp and 260wtq

yea, i dunno about it loosing performance that dramtically .

[redsled]

well car ran great made good power and ran good 1/4 mile so who knows i have a gen3 now so i will never know

[MR2SW22]

Originally Posted by redsled

well car ran great made good power and ran good 1/4 mile so who knows i have a gen3 now so i will never know

i want your honest experienced opinion, i had 2gen jdm in my first 2, it had an exhaust, 1 cat, hks intake, hks evcVI set at 15psi, and i felt it was a fast car. how would you rate the difference between the 2gen and the 3gen?

[redsled]

i really enjoyed both but the real difference was these
1.gen2 ran 13.96@103mph on 17's - gen3 with same mods ran 13.3@106mph both at 15 psi
2. gen3 is a smoother power all the way to redline
3. my gen3 is really good on gas
gen2 i was getting 325klm's tank - gen3 500klm's and on 94 sonoco while i was on vacation i got a 578klm's on a tank but that was once

both are equally hard on gas when boosting all the time but thats normal

both were alot of fun

i just got hks cams and aem cam gears are on the way for my gen3 cant wait to see what it makes at the dyno


if you are planning to build a huge beast gen2 is the way to go just because its cheaper
if you want fast/smooth power without many mods gen3 all the way

the only mods i have at this moment is intake exaust ic kit 16 psi and its pretty sweet srt4 with lots of mods and dump tube at 22psi cant keep up so its pretty sweet

[MR2SW22]

Originally Posted by redsled

i really enjoyed both but the real difference was these
1.gen2 ran 13.96@103mph on 17's - gen3 with same mods ran 13.3@106mph both at 15 psi
2. gen3 is a smoother power all the way to redline
3. my gen3 is really good on gas
gen2 i was getting 325klm's tank - gen3 500klm's and on 94 sonoco while i was on vacation i got a 578klm's on a tank but that was once

both are equally hard on gas when boosting all the time but thats normal

both were alot of fun

i just got hks cams and aem cam gears are on the way for my gen3 cant wait to see what it makes at the dyno


if you are planning to build a huge beast gen2 is the way to go just because its cheaper
if you want fast/smooth power without many mods gen3 all the way

the only mods i have at this moment is intake exaust ic kit 16 psi and its pretty sweet srt4 with lots of mods and dump tube at 22psi cant keep up so its pretty sweet

94 sonoco? 94 octane gas?

[redsled]

yup in ontario the sonoca gas stations have ultra 94 down here in new brunswick we are stuck with 91 crap the car really loved the 94

[3SGTE_BYT]

im picking my MR2 up on wednesday with the JDM 3sgte.... This thread has done me no good lol. I want a BOV but everyone keeps saying no.

I have been wanting to be boosted for a couple of years now and i am most definatly wanting that BOV just dunno which one lol everyone has had so many different opinions.

[MR2SW22]

Originally Posted by 3SGTE_BYT

im picking my MR2 up on wednesday with the JDM 3sgte.... This thread has done me no good lol. I want a BOV but everyone keeps saying no.

I have been wanting to be boosted for a couple of years now and i am most definatly wanting that BOV just dunno which one lol everyone has had so many different opinions.

quite the contrary, i say YES! HKS is quality, it's not the cheapest but you get what you pay for, and it sounds very clean and not so loud your gonna hate boostin, plus you can adjust it to an extent.

[3SGTE_BYT]

cool thanks bro!!! i'll have to order me one soon