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Old 12-16-2010, 04:10 PM   #91
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i just found this thread and after reading through it im wondering why you have the truck running so rich during WOT wouldnt it benefit to lean in out a bit and still be safe. I know na motors under WOT should be about 12.9 to be safe but i havent researched air fuel ratio for my procharger set up yet.
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Old 12-16-2010, 06:27 PM   #92
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I don't remember which, but a few of those videos were taken before I finished tweaking the tune. Runs 11.7:1 now.
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Old 12-16-2017, 07:04 AM   #93
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GM stole my design!

"[The supercharger] would handle power production down low. The turbocharger would come on at around 3,000 rpm and would handle boost duties from there. In fact, you can see in the patent that there is actually a valve designed into the system that would allow the turbo to bypass the supercharger completely at higher RPM."

http://www.corvetteonline.com/news/g...hybrid-engine/
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Old 12-16-2017, 10:18 AM   #94
I have a gauge for that
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Pretty sure Volvo did it first :p
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Old 12-16-2017, 10:41 AM   #95
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Default S/C and Turbo

This was done by GM on there big V8 tractors many years ago.
I drove a GMC 18 wheeler that had both S/C and Turbo back
in the 80's
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Old 12-16-2017, 11:15 AM   #96
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Quote:
Originally Posted by Atomic View Post
Pretty sure Volvo did it first :p
With the same bypass control? Suppose I should have specified...I meant the method of bypassing the supercharger to use compression sequentially. We all know every dude with a turbo, blower, too much time and a beer has built a compound setup lol.
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Old 12-16-2017, 09:53 PM   #97
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Detroit Diesel did it first. Roots type charger with wet turbos...
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Old 12-17-2017, 05:43 AM   #98
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Quote:
Originally Posted by turboal1 View Post
This was done by GM on there big V8 tractors many years ago.
I drove a GMC 18 wheeler that had both S/C and Turbo back
in the 80's
The two stroke detroits such as the 8v92TA you probably drove couldn't suck in the air on their own, hence the blower on top to push it in. The turbo basically just makes power. The engines are gutless without a turbo
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Old 12-17-2017, 10:13 AM   #99
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The entire point of this project was to use sequential boost. Blower/turbo compound=****.
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Old 12-17-2017, 10:17 AM   #100
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Quote:
Originally Posted by Richardman1992 View Post
The two stroke detroits such as the 8v92TA you probably drove couldn't suck in the air on their own, hence the blower on top to push it in...
Right, because...

Quote:
Originally Posted by turboal1 View Post
...
I drove a GMC 18 wheeler that had both S/C and Turbo back
in the 80's
...they did not have super chargers, they had blowers. The roots type blower was not installed on 2 stroke diesels to super charge them, but only to charge them. Without the turbo, a 2T Detroit is considered naturally aspirated. As Richardman said, it would not run without a blower. It is only when you mount a roots blower on an engine that can charge itself that it becomes a supercharger.
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