Msm, which style of bov do you prefer?
#1
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I'm gathering the last few pieces to put on my budget turbo kit. Since I'm running : 1.8 swap, mspnp2, wideband o2, and no afm, I ask a straight forward question of the opinion of those who have boosted before me.
Which style of blow off valve is the best bang for your buck? I am going in on a project that is mostly budget oriented, so any suggestions? Later on im thinking of a beautiful GFB bov but for now I need cheap function. Thanks a ton
Which style of blow off valve is the best bang for your buck? I am going in on a project that is mostly budget oriented, so any suggestions? Later on im thinking of a beautiful GFB bov but for now I need cheap function. Thanks a ton
#2
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I don't know what works best on a miata, but when I had my DSM I fell in love with the sound from a genuine greddy type-s.
Regardless of performance, I'd throw this on anything if I could keep hearing that sound lol. I checked those ebay replicas, but they don't sound the same, and any bov for 30 bucks is bound to not be as effective.
GFB or gofastbits makes some really awesome products, Blow off Valves/Diverter Valves
Regardless of performance, I'd throw this on anything if I could keep hearing that sound lol. I checked those ebay replicas, but they don't sound the same, and any bov for 30 bucks is bound to not be as effective.
GFB or gofastbits makes some really awesome products, Blow off Valves/Diverter Valves
#4
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Forge motorsports makes a great oem 3/4" replacement if you can find it.
![](http://www.bellengineering.net/images/products/150/full_size/P5091138.JPG?)
This might be a newer design, email forge and make sure it's the correct size.
http://www.forgemotorsport.com/Turbo...duct--756.html
$161 on Amazon -
This might be a newer design, email forge and make sure it's the correct size.
http://www.forgemotorsport.com/Turbo...duct--756.html
$161 on Amazon -
Last edited by Girz0r; 03-22-2016 at 02:13 PM.
#10
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In my own experience when using MAF, my greddy FV solved a lot of tuning headaches when I put it on my turbo system. (VS the old ebay copy greddy type rs that was on the car, had o-ring seals & a bad adjustment design.)
If using MAP, anything should be fine as long as your tuning is on point.
Are you using a MSM turbo setup?
Do you have a cat?
If using MAP, anything should be fine as long as your tuning is on point.
Are you using a MSM turbo setup?
Do you have a cat?
#11
Boost Pope
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The plastic-bodied Bosch valves are a good, reliable choice here. The one 90civichhb linked to on eBay appears to be an approximate copy of one, and is probably as good as any other in this regard.
On my '92, I used a cheap, Chinese made knockoff of a Greddy RS, for which recirculating adapters are available.
#12
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huh? I was just about to recommend the piston style cause IMO it is more reliable than a rubber balloon that will deteriorate over time and leak
also the bosch plastic valves are notorious for leaking, even at low boost.
We seem to have polar opposite opinions lol
(though all the piston style valves I've used were new or near new, so you might be right regarding super old ones with bad seals)
also the bosch plastic valves are notorious for leaking, even at low boost.
We seem to have polar opposite opinions lol
(though all the piston style valves I've used were new or near new, so you might be right regarding super old ones with bad seals)
#17
Boost Pope
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This is approximately the valve that I settled on for my '92, after going through two others:
Black Turbo Type RS BOV Blow Off Valve Adjustable PSI Boost Accord Prelude RSX | eBay
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/166204-msm-style-bov-do-you-prefer-80-blob_224d96d2ab4c078f9627ab74a50e9381a1897129.png?dateline=1458697268)
I don't remember exactly who I bought it from, and I have no idea how many different places are actually manufacturing these knockoffs (relative to the number of vendors selling them under different names), but it gave me years of reliable service.
The recirc adapter is a separate piece. I cut my own on the lathe, but you can also buy them for about $15.
A lot of these have dual, coaxial springs inside. For lower-boost applications, or for a softer transition into and out of venting, you can open it up and remove the smaller of the two.
Regardless, you'll want to open it up anyway to clean it out thoroughly (this sort of Chinese **** is notorious for coming out of the box full of machining chips and abrasive dust) and put some light grease on the moving parts.
Tubes are also widely available with a mating flange for it pre-attached, in case you're not up for welding. Example: 2 5"T 6061 Aluminum for Greddy Turbo Intercooler Blow Off Valve Flange Pipe Tube | eBay
Black Turbo Type RS BOV Blow Off Valve Adjustable PSI Boost Accord Prelude RSX | eBay
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/166204-msm-style-bov-do-you-prefer-80-blob_224d96d2ab4c078f9627ab74a50e9381a1897129.png?dateline=1458697268)
I don't remember exactly who I bought it from, and I have no idea how many different places are actually manufacturing these knockoffs (relative to the number of vendors selling them under different names), but it gave me years of reliable service.
The recirc adapter is a separate piece. I cut my own on the lathe, but you can also buy them for about $15.
A lot of these have dual, coaxial springs inside. For lower-boost applications, or for a softer transition into and out of venting, you can open it up and remove the smaller of the two.
Regardless, you'll want to open it up anyway to clean it out thoroughly (this sort of Chinese **** is notorious for coming out of the box full of machining chips and abrasive dust) and put some light grease on the moving parts.
Tubes are also widely available with a mating flange for it pre-attached, in case you're not up for welding. Example: 2 5"T 6061 Aluminum for Greddy Turbo Intercooler Blow Off Valve Flange Pipe Tube | eBay
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/166205-msm-style-bov-do-you-prefer-80-blob_e97ce8219f9251b3cc180b3623acdbb8e02110c0.png?dateline=1458697268)
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