Steeve_Civic

My greddy is not on good conditions and would like to change, but my car is only for drag racing now, so do I need one?
Do you use one guys?

Zer0_SpeedWorks

iTrader: (1)

Tial Q bov here

vtechjunkie

iTrader: (2)

^ Same for me. Even though its a race car, I'd rather not have the compressor surge.

Steeve_Civic

Tial Q, seems to be one of the best Blow Valve

Are you using Full throttle shift?

Turbo-LS

iTrader: (4)

If you are boosted you should be running a BOV. Its bad for the turbo not to run one. Im running Turbosmart Raceport. Love turbosmart products. tial is good too

Dark_Teg

Some people say if you run an anti-surge housing you dont need one. I have the anti-surge housing but went ahead and ran one anyways (Turbosmart Raceport)

99V-unit

Yes, you should run one.

I have a synapseengineering synchronic bov and no issues almost 2.5 years later. Its fully adjustable based on how fast you want it to dump.

Divers

That is not the same surge. Ported housing are meant to shift a turbo's surgeline to the left by exposing air to the middle of the compessor.

When you slam the throttle shut on a turbo at full speed it will definitely blow all that air out the front of the compressor in a violent way. Run a bov unless you have a diesel

92_DB2

Synapse here also. Best BOV on the market.

Steeve_Civic

Which spring is in your Tial or Blow off valve please are you running?

boostjunkie757

it would be a good idea to get one if you let off the gas between shifts..

rootbeerbrown

I run a tial blow off valve my ef is set up for drag racing as well but if you take off your blow off valve you are just asking for boost leaks the pressure is going to have to go some where when you let off the gas

Steeve_Civic

No more than 12PSI spring?

itspools

Tial springs are rated off vacuum so if you pull 20" vacuum at idle run a 10psi spring, 16" run a 8 etc

SPOOLINmatt

just run one.

Steeve_Civic

So don t understand, what do you mean please!

Tippyman

It explains it in the instructions that come with the valve. Basically if you have a big cam you pull less vacuum so you need a diff spring. A normal engine will make about 20 in hg at idle. Mine makes around 14-15 in hg due to the cam.

Steeve_Civic

Okay, running S2Pro1s cams.
Didn't take attention about that, what are the consequences If spring is too soft or stiff?

scmil95eg

If the spring tension is too low, idle vacuum will pull it open when you don't want/need it open.
If the spring tension is too high, vacuum won't pull it open when you do want/need it to open.

Steeve_Civic

Thank you, with map sensor (not maf) we don t matter If it is open at idle, right?

Steeve_Civic

I think it doesn t matter for our Drag car?

Boosted_01 R

Using TIAL also, and yes it matters, so you should run one regardless of setup, street or track only, it's doesn't matter if you want to save your turbo.......... Don't think this is an official chart, but basically what everyone is talking about...

phaphon

So a stock motor ls b18b1 turbo should need a 11psi spring?cause the one I ordered from go auto works is coming with a 6 psi spring and there was no option to choose from

Steeve_Civic

Just tested at idle, 15.5in/hg, so I need a 8 spring If I want to open the BOV when shifting?

Boosted_01 R

I would go with a 9psi in that case.... I would verify with Tial... just in case the springs have changed over the years....