Tial 50 MM Question
Tial 50 MM Question Hey I want to replace the stock ati bypass unit for a tial 50mm bov. I was wondering if I can mount the tial unit in the same spot as the stock bypass or will I have to move it after the blower on the intake piping? I have also heard that BOVS can be kind of hell on the bearings or something inside the blower? Here is a picture of my current setup.
We are working on a LT1 396ci with a D1 Blower.
Having the MAF on the charged side of the blower, (after the blower) is important. See the Rubber hose between the 90deg from the TB, to the dual tubing on the driver side of the car. We cut that rubber tubing and put the MAF there.. It worked out much better as we didn't run rich from a quick stab of the throttle, also having the MAF before the Blower, we could not properly tune the car since there was a slight hesatation. The hesatation was caused by the fast we would hit the gas, the blower would instantly suck more air, but the air did not quite make it to the engine yet and we saw alot of black smoke when we hit the gas quickly..
Also, it's good that your going with a aftermarket BOV. but have one that blown off to atmosphere! Don't re-route hot air back into the motor.
Clint
Having the MAF on the charged side of the blower, (after the blower) is important. See the Rubber hose between the 90deg from the TB, to the dual tubing on the driver side of the car. We cut that rubber tubing and put the MAF there.. It worked out much better as we didn't run rich from a quick stab of the throttle, also having the MAF before the Blower, we could not properly tune the car since there was a slight hesatation. The hesatation was caused by the fast we would hit the gas, the blower would instantly suck more air, but the air did not quite make it to the engine yet and we saw alot of black smoke when we hit the gas quickly..
Also, it's good that your going with a aftermarket BOV. but have one that blown off to atmosphere! Don't re-route hot air back into the motor.
Clint
Launching!
Joined: Apr 2003
Posts: 243
Likes: 0
From: Phoenix, AZ.
It definitely needs to be located after the blower and before the MAF if you have that located after the blower. If the MAF is before the blower that's ok, just mount the BOV after the blower. Problem is you're MAF is adjusting for air that you'll be bleeding off so it's going to run rich that way under deceleration.
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Yep, listen to the man!! 
Yea my buddy had a bypass valve on his 347 procharger mustang. He just redid his motor by putting a dart block in it and added the mondo valve. He still uses it like the bypass valve becuse of the mass air. Just rout the air back into the intake and it will work just the same. You just wont hear the noise really.
Billy
Billy
FormerVendor
Joined: Dec 2001
Posts: 2,444
Likes: 2
From: WWW.SPEEDINC.COM
Originally Posted by HUGGER ORANGE SS
Why do you Say that????
Clint
Clint
A bypass valve is normally open under engine vacuum (idle and cruising) to allow air being moved by the supercharger to freely bypass to atmosphere or recirculate.
This is necessary as the supercharger is mechanically attached to the engine, therefore compressor speed and airflow is directly related to engine RPM.
When you put a blow off valve in place of a bypass valve, (which is normally closed during engine vacuum, idle, cruising, and only opens after throttle is closed during a boosted situation), the air being moved by the supercharger has nowhere to go as it cannot freely recirculate or bypass the system. Now when you are idling and cruising, the supercharger is in a constant state of compressor surge, and if enough pressure is built up, the BOV will start 'chirping' while pressure is escaping past it.
What this does is heat up your intake air charge, as it is constantly being compressed, and also, it is annoying as hell.
A turbochargers output on the other hand, is completely load-dependent, so there is no excess air that needs to be bypassed during idle/cruise conditions. You don't even really "need" a bov with a turbocharger, but when you close the throttle during a high boost situation, the pressure surge between turbo and throttle blade will cause compressor surge (which could possibly damage the turbo over time), and on a stick shift car, it will slow down the turbine to the point that lag will be increased during shifts. If the excess air can be 'blown off' during shifts, the compressors will not be dragged down as much and will come on line much faster after selecting the next gear.
Great explaination, really never understood the technical details between the two and now I understand that they are really application dependant. TURBO=BOV S/C=Bypass.
Thanks INTMD8
Thanks INTMD8
Exactly if you want to hear the chirping of a BOV on a SC car let me know i had it and sold it.... the chirping is horrible.... i have a vid.
I sold it and went with a Vortech Mondo Bypass and it sounds awsome.....
Kyle
I sold it and went with a Vortech Mondo Bypass and it sounds awsome.....
Kyle
