Boosted Solutions BS-66 vs Precision PW-66 Wastegates
08-03-2016, 05:52 PM
#1
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Boosted Solutions BS-66 vs Precision PW-66 Wastegates Hey guys. I am now in the market for a wastegate. Wondering if anyone has anything to say about either the BS-66 or PW-66. The BS-66 is about $150 cheaper and honestly looks almost identical to the precision pw66. I like paying less but not if I sacrifice quality. Not saying that boosted solutions is bad just dont really know much about there or precisions gates. Thanks for any all help.
08-04-2016, 06:54 AM
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It's just a 5.3 with an s475. Planning on not running super high boost since its a gen 3 for the time being. So in order to keep boost low I need plenty of wastegate flow. Don't feel like plumbing twin 38's and the price difference from a 44 to a 66 is not much so I'd rather play it safe with the bigger wastegate and not have to worry about it later.
08-04-2016, 07:51 AM
#6
I wouldn’t jump on the big gate band wagon. No way no how will you even need a 66mm gate on a 5.3. That’s 2.6”… larger than the hot side piping you should be using… completely pointless and will be finicky controlling boost as it’s too large. Large gates like that are typically controlled with C02 on a 400+ cube engine revving to the moon.
This is a great gate. 40mm is plenty on a 5.3 and would be enough to get the boost done to 3-4psi easy on a properly setup system.
http://www.jegs.com/p/JGS-Precision-...76923/10002/-1
This is a great gate. 40mm is plenty on a 5.3 and would be enough to get the boost done to 3-4psi easy on a properly setup system.
http://www.jegs.com/p/JGS-Precision-...76923/10002/-1
08-04-2016, 07:56 AM
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Alright well know I'm questioning it. But I asked before on recommended wastegate size and most recommended the a single larger 60mm wastegate. Some said they had trouble keeping boost down with a 44.
I just really don't like doing things twice as I'm sure most would agree
I just really don't like doing things twice as I'm sure most would agree
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08-04-2016, 08:20 AM
#8
If the installer positioned the WG incorrectly, sure they may have had issues controlling boost. I can tell you from experience if placed correctly, a single $60 chian 38mm gate easily held down to 10lbs on a 5.3/ T4 78/75 combo. Probably could have made less with a lighter spring. My single 40mm net me 7-8lbs with the lightest supplied spring in my 5.3 S475 combo.
I agree doing things twice stinks. If you install the part correctly, you won’t need a huge expensive gate. WG needs to be parallel to flow and the entry to the turbo perpendicular to flow.
Should be similar to this….
Mounting on the turbo housing itself is also popular these days and works well.
I agree doing things twice stinks. If you install the part correctly, you won’t need a huge expensive gate. WG needs to be parallel to flow and the entry to the turbo perpendicular to flow.
Should be similar to this….
Mounting on the turbo housing itself is also popular these days and works well.
08-04-2016, 08:32 AM
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Ok cool thanks. I definitely agree placement and the angle is critical. And ok thanks for the advice. If anyone has any other experience I'd still like to here but sounds like a 44 is the way to go now.
08-05-2016, 02:25 PM
#10
Fwiw, my build was the same as I have a billet s483 on a gen3 6.0 so I needed to keep my boost low. I have the precision 66mm gate to exit all the exhaust gas to keep my boost low and more importantly UNDER CONTROL. That being said I can run on 10 lbs and boost stays dead nuts on 10 lbs with 0 creep. So from my experience it works well and iv seen the BS in person and looks identical. But the down side is the 66mm gate is HUGE and finding a place to put it will be a challenge but after all said and done your good to go. And this is 100% factual as I have on my car, not my buddy's aunts brothers friend who knows somebody etc, lol.
08-08-2016, 08:33 AM
#13
There’s more to it than that. Like anything performance… size your WG to the turbo system you’re using. A 66-60mm isn’t needed and can even cause problems in boost control, esp. on low back pressure setups. Couple reasons for this…
First, you want the WG to have a wide range of motion to control your boost to keep control the most accurate possible. It’s similar to running a 4 bar map sensor to run 10lbs of boost, you lose resolution. If you have a 66mm valve you’ll have a large fluctuation in boost pressure with VERY little valve movement, that’s not ideal. For the same reasons you don't want too small of a gate either. I'm not claiming everyone should run a tiny WG.
Second you have to take into consideration valve face area VS dome diaphragm area. You want the dome/diaphragm area to be much larger than the valve area. Look at a 38mm compared to a 66mm WG. You’ll notice that the 66mm gates doesn’t have a proportionally large “dome” when compared to a smaller gate. This means you’ll need more pressure in the top port to hold the valve closed than you would with a smaller control valve.
Note how large the “dome” is compared to the valve face on this 44mm model.
Now look at the 66mm model… Because they are much closer to the same size, you’ll need more pressure to control it. Usually done by on board Co2.
First, you want the WG to have a wide range of motion to control your boost to keep control the most accurate possible. It’s similar to running a 4 bar map sensor to run 10lbs of boost, you lose resolution. If you have a 66mm valve you’ll have a large fluctuation in boost pressure with VERY little valve movement, that’s not ideal. For the same reasons you don't want too small of a gate either. I'm not claiming everyone should run a tiny WG.
Second you have to take into consideration valve face area VS dome diaphragm area. You want the dome/diaphragm area to be much larger than the valve area. Look at a 38mm compared to a 66mm WG. You’ll notice that the 66mm gates doesn’t have a proportionally large “dome” when compared to a smaller gate. This means you’ll need more pressure in the top port to hold the valve closed than you would with a smaller control valve.
Note how large the “dome” is compared to the valve face on this 44mm model.
Now look at the 66mm model… Because they are much closer to the same size, you’ll need more pressure to control it. Usually done by on board Co2.
01-28-2017, 08:10 PM
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If the installer positioned the WG incorrectly, sure they may have had issues controlling boost. I can tell you from experience if placed correctly, a single $60 chian 38mm gate easily held down to 10lbs on a 5.3/ T4 78/75 combo. Probably could have made less with a lighter spring. My single 40mm net me 7-8lbs with the lightest supplied spring in my 5.3 S475 combo.
I agree doing things twice stinks. If you install the part correctly, you won’t need a huge expensive gate. WG needs to be parallel to flow and the entry to the turbo perpendicular to flow.
Should be similar to this….
Mounting on the turbo housing itself is also popular these days and works well.
I agree doing things twice stinks. If you install the part correctly, you won’t need a huge expensive gate. WG needs to be parallel to flow and the entry to the turbo perpendicular to flow.
Should be similar to this….
Mounting on the turbo housing itself is also popular these days and works well.
02-09-2017, 09:00 PM
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