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Thread: what BOV are you running?

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Posts: 41-50 of 53
2009-06-28 03:46:38
#41
Originally Posted by SE-Rican
Which wastegate is this Tekkie? Do you have info on this?


It's just the synapse wastegate. It's got the adjustable valve on the tophat. I almost bought it at my friends shop but he sold it the same day I was goiv. To pick it up. You should just check out their website for details, and specs.
2009-06-28 03:55:07
#42
Looks to be an external one, I heard those can do around 40whp on a T28 setup.
2009-06-28 04:17:52
#43
Originally Posted by Vadim
Looks to be an external one, I heard those can do around 40whp on a T28 setup.


I have known of many guys who have gone from internal wastegates to external gates on there T-28 set ups and the gains were very noticeable. Andreas back in the days added external gates to Pulsar manifolds and they worked amazing.


Tekkie I will check their sit out for sure. I already have a Tial WG and BOV but it is interesting to control boost at the WG. It is a great idea.
2009-06-28 07:02:29
#44
I swear by the DSM or factory nissan. The crushed DSM has been very reliable for me, with barely a hint of surge and holds up well to boost. Plus it was free. I don't see the sense in buying a 100+ BOV unless it is a forge unit. I won't spend the money for a Tial. It's just not worth it unless you are 700whp+
2009-06-28 14:12:39
#45
I used to run a 1g DSM recirc, but then I developed some problems which lead me to replacing it with a synapse unit. It has awesome response and I get no compressor surge with how it came from the factory. It is kind of a pain since you have to hook up 2 vacuum (has a T to split into 2 signals) and 1 boost line to it if you run over 7psi.

on a side not I have the synapse wastegate too and I really like it. Obviously I don't switch the lines around too much, but its nice to have options in case I switch setups or If i get brave to run high boost.
2009-06-29 15:43:37
#46
Originally Posted by swiss
and the reason is...

More prone to failure or something? IDK, from my experience with compressor surge (with 3 out of 4 BOVs I've owned), I very much like having the ability to control it.
Sorry for the late reply.

Reasons I don't like adjustable BOVs:
  • More prone to failure or leakage
  • Over adjustment causes failure
  • In the hands of an amateur it can do more harm than good
  • Once you've adjusted it properly, you'll never need the adjustability ever again
Some items are nice to have that are adjustable, and don't cause too many problems. Manual boost controllers are a good example. Them being adjustable is nice, and the pros outweigh the cons.
BOVs on the other hand, usually work just fine out of the box. If it doesn't for some reason, then replacing the spring with another that matches the amount of vacuum your engine produces is the answer. So I prefer Tial's method (swapping springs) to the screw-type preload method other adjustable BOVs use.

Same thing with adjustable FPRs. If you want to run 4 bar, get a 4bar FPR.


This is my opinion.
2009-06-29 16:19:10
#47
Tial 50mm, have used it on 4 cars now and it is great (they are all MAP based with EMS though)

Brent
2009-06-29 16:30:28
#48
Originally Posted by BenFenner
Sorry for the late reply.

Reasons I don't like adjustable BOVs:
  • More prone to failure or leakage
  • Over adjustment causes failure
  • In the hands of an amateur it can do more harm than good
  • Once you've adjusted it properly, you'll never need the adjustability ever again
Some items are nice to have that are adjustable, and don't cause too many problems. Manual boost controllers are a good example. Them being adjustable is nice, and the pros outweigh the cons.
BOVs on the other hand, usually work just fine out of the box. If it doesn't for some reason, then replacing the spring with another that matches the amount of vacuum your engine produces is the answer. So I prefer Tial's method (swapping springs) to the screw-type preload method other adjustable BOVs use.

Same thing with adjustable FPRs. If you want to run 4 bar, get a 4bar FPR.


This is my opinion.


Fair enough! That's kinda what I figured it was, and that's a valid point. I actually had an adjustable Nismo FPR fail and cost me a motor. It turns out boosting on 20lbs of fuel pressure can blow stuff up. At least with the BOV, the likely failure scenarios are boost leak or compressor surge, which aren't likely to result in any serious damage.

I'd be interested in a 4 bar FPR if you have any info. I've deducted you don't like to post off topic replies. If you have any good suggestions in that department, please bump a random FPR thread or send me a PM!
2009-06-29 22:13:39
#49
Swiss, the Bosch catalog is a great place to start looking. If I come up with anything else I'll post it too.

Edit: I hear the Porsche 944 turbo FPR is 4 bar (check to make sure). I'm not sure about fitment on an SR20 though. Same goes for the Bosch units.
2009-06-29 23:48:57
#50
Atmospheric Blow thru - Greddy Type S
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