Scorch BUILD v2.0 by dascorcha21

8 minute(s) of a 71 minute read

Looking good...
Driver's side





Passenger side



ECS ALKY kit 90% installed just need to finalize the wiring..









12/6/11

Some more pics(HD) Got the parts back from Powder Coating finally. I even took the Procharger big red apart and made it big Black! Lol

One thing I would like to touch on with this BPV. I don't want to step on anyones toe's as I see plenty of vendors and people using mondo's and BOV tial/turbosmarts etc but it has been my experience that those either don't flow enough (enclosed valves) or don't react fast enough (different springs needed to be changed) that it was causing me issues and trying to track the problem finally led me to the BPV I was using which was the mondo then tested with a tial and problem still persisted so I finally switched to a procharger big red problem solved. The issue was because of the amount of boost I was running and the slow or limiting flow of the BPV/BOV being used was throwing my car into REP mode because the TB was fluttering on decal in high RPM. This problem is more prominent once you really start to spin the blower hard. Furthermore I observed through logs that during just regular cruises my IATs drop considerably using the big red. I believe this issue is more focused on DBW TBs hence why you see some of the high power track cars switch to cable drive. Now I'm not saying that whatever you have on your car doesn't work this is basically just my experience and explanation of why I chose this product.

Also not seen in the picture, all my alky lines have been covered in black braided expandable sleeving to follow the engine bay theme. I also opted to only do a single nozzle as I will be using this to lower IAT's more over than utilizing it as an octane booster as I will be running a cold fuel e85.

I will get the fittings black as well. On the valve covers I have drilled several holes into the baffle to make sure there are no restrictions in venting the engine through the 2 massive -12an fittings.

All piping was powder coated black and the intercooler to TB J-Pipe was modified by extending it and welding on an IAT sensor bung as I will be using a threaded IAT sensor (much better leak proof choice when going high boost)











Not sure who all has taken apart their Procharger race valve but in my quick search I couldn't find any info or pictures. So for your viewing pleasure I took some pics while I was putting it all back together.









Also pics of the meth lines all done and ready.



Well I guess I could have got a bit more technical in my assessment. Now I wasn't saying that BPV and BOV aren't the same for the most part. More or less they are sold and applied to applications differently (some features are there and some not)
The Mondo - it's pretty much a closed recirculated valve the problem I had was that it didn't flow enough. When at 6500rpm and letting off the throttle (unlike turbos the sc keeps pushing air as its directly related to rpm) it would start to flutter/chatter. This would create back pressure to the impeller and possibly cause future issues with the SC. In my case the air would find the weakest link (TB) and cause the tb blade to flutter/move which caused problems with the pcm throwing the car into REP mode because the PCM is reading/sending that the TB should be at a certain voltage and it's not. This was very apparent if you ever tried to peddle the car.

The Tial BOV while I would've thought that this would've worked just fine I was sadly mistaken. While the problem wasn't that it didn't flow enough, the problem was spring selection. Keep in mind with what vendors sell marketed as Bypass Valves usually display this specific characteristic they will be open during all states of vacuum and close when pressure is applied, while Blow off valves remain closed during cruising/idle and opens in a boost to vacuum scenario. The issue I encountered with this was the recommended spring for SC applications is a 3lb spring which allows for the BOV to open at idle and cruise and relieve the pressure. Well keep in mind on my application I was pretty much making boost at idle because I was pulley'd to overspin the blower. With a 3lb spring in it under boost the BOV would partially open and not hold boost. Had to utilize a 7lb spring before it would fully shut at wot and then the problem became that it would not open at idle and cruise to vent off the unused pressurized causing me surge etc (which is usually audible as chirping noise.) couple that with low vacuum from the cam etc I just couldn't get it to work properly..



In comes Procharger "Big Red" I would say it shares the close to the same design as the tial bov but has some difference. One thing to note is that the BPV would agree The Vortech B57 and the Procharger "Big Red" mondo basically the valves that are labeled BPV all have breather/ outside vents some more apparent than others. Also they all have an adjustment screw at the top More so your adjusting the spring preload. The procharger valve def. flowed enough more so measured by the IAT logs compared to the other 2 while just at idle and cruise. Simple small adjustments could be made from the adjustment screw with no need to change springs etc. all in all maybe I had bad luck with the other 2 or just had bad valves who knows this is basically just my experience with these products not something I read about on the internet. So take it with a grain of salt at the end all that matters is that im happy with it and it works.. :P





My recommendation for any all-out blower setups would be The Vortech B57 or Procharger "Big Red"
http://www.tialsport.com/prod_bv_q.htm
http://www.vortechsuperchargers.com/product.php?p=24
http://www.vortechsuperchargers.com/product.php?p=23