Turbo Z06 Corvette and Synchronic BOV

We swap out the 2 Bosch DVs that came with the ... (more)
Added: February 14, 2008
We swap out the 2 Bosch DVs that came with the APS turbo kit on Seth's C5 LS6 Z06 Twin turbo Corvette. The Synchronic BOV's make 25 more HP just by swapping out BOVs.

Category:

Autos & Vehicles

Tags:

• corvette
• chevy
• c5
• ls6
• aps
• turbo
• wastegate
• dv
• bosch
• blow-off
• valve
• diverter
• hks
• greddy
• tial
• american
• v8

[synaptic1]

The Synchronic line of products are available by registering at SYNAPSEENGINEERING*COM/CART, use referral code YOUTUBE when you register and be eligible for limited edition designs and market pre-releases

[BLown05Navigator]

God damn id love to smack the shit out you punks. Grow the fuck up.

[synaptic1]

I haven't read these comments in a while, that is some funny sh*t up there for sure

[mr101f]

is it possible that the turbos are just putting out more as they are reacting to the heat. I have a turbo z06 and I ran three runs with no changes and the car put out more each time. The difference each time is the turbos were getting hotter and more efficient. Replacin

[synaptic1]

we isolated that variable.  We ran it cold before, and with a long cool down time to install the BOVs ran it cold again and compared results. 3 runs with the BOV on didn't show a major difference, so it wasn't heat soaking.

[akamakaveli96]

this is the biggest load of crap

[synaptic1]

I guess dyno sheets lie

[ryu1036]

how is he a ricer when hes putting 523 hp to the wheels? last time i checked, a ricer was a wanna be fast car driver with a honda civic who bought the fucking coffee can exaust and drove dwn the street sounding like a weed wacker.

[Rockit181]

I think the old bosch BOV's were leaking boost

[redrex3]

...which is exactly why I said, "perfectly working."

[MrChompenstein]

yup the WG will vent off the excess heat/exhaust gasses that would otherwise spool the turbo too fast, based of course on the systems you mentioned

on another topic, if theoretically the waste gate were to dump into another turbo, you have a sequential turbo system, which when implemented allow two small turbos to produce large boost without a great deal of lag, by spooling the first turbo completely before rerouting the extra gas into another turbo, systems like this can be found on supras/rx7

[mr101f]

Oh ok, I gotcha. I think we are saying the same thing just differently. In addition; the WG will bypass exhaust gases right? "Keeping turbo at speed/boost." Some exhaust gases are diverted away from the turbos exducer wheel to keep it turbos from providing more boost than the WG spring allows in psi or bar. All this ofcourse unless you have a boost controller that tricks or keeps the true boost amount from the WG Spring. In other words; the boost gauge may read #15 in intake with a #8 WG spring.

[MrChompenstein]

i think we are both right, but to elaborate on some of the mechanics . . . the bov is going to open post throttle shutting, so that like i said the turbo will not be trying to make boost without proper exhaust heat/pressure, at this time the turbo will be free wheeling until it is needed again

also to clarify WG dont keep turbos at speed, they prevent them from spinning too quickly, that is to say that 100% of exhaust will go through the turbo until the amount would exceed the turbos capability

[mr101f]

I think also BOV's help reduce surge. But not sure. I think I addressed why the BOV is closed off idle. In regards to fuel econo and speed up boost response. Bottomline is whenever the diaphram/spring in BOV senses a certain about of Vacuum. ??? then it has to open and dump remaining boost. How fast it dumps it is one thing. Turbos are kept to speed by WG. But once exhaust pressure on exhaust side of turbo is loss. It must rebuild speed to regain boost.

[mr101f]

I do not know however quite interesting. A turbo application usually improves gas mileage under normal circumstances. I think that is due to turbos assisting in speeding the air thru intake. Not in boost condition yet but pushing air along. So I think anything off idle or low to no vacuum and BOV shuts. I think BOV's are mostly used for stick shift cars for a slow dumping of boost during lift throttle shifts to reduce lag. Keeps turbos from starting completely over to build boost pressure.

[MrChompenstein]

by the way, correct me if im wrong, i cant exactly find out where i got that information, so if its bs i would really like to know, but it seemed to make sense so im hoping my memory has served me well

also when the bov are open when not under boost, if the bov can more accurately determine the vacuum or lack there of in the intake, it will close more accurately, providing boost sooner, i.e. better response again

though is that what you meant about leaking?

[MrChompenstein]

i believe bovs are also used to help the turbos spool, since they will produce negligible boost until they reach a certain rpm, the bov can be opened so that the turbos dont have to compress anything until its up to speed. Also while boost isnt needed the bov can remain open to keep the turbos at speed, so that boost is really there when you need it

so in this case the new units may just be more accurately utilizing this ability, and the guy said it seemed more responsive so it seems possible

[mr101f]

I agree; the bosch bov's got to be leaking. I am by no means an expert on the subject. However from what I do know and correct me if I'm wrong. The BOV only acts as a quick exit to vent boost to atmosphere in the event the throttle plate is closed. Turbos are responsive to heat. Turbos HULK up during consecutive runs on the dyno due to the increase in heat. My 04 Z06 HP numbers went from 516, to 535, to 559 with only #7 boost with the STS kit. Torque did similar increments with max being 556.