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Old 12-03-2010, 06:39 PM   #1
95mmRenegade
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Default Fuck it... Turbocharging 102: Turbo system design

This thread will be dedicated to turbo system setup and design. Lets discuss

1) Header design, Size and construction
2) Crossover tube design, size and construction
3) How do you choose the correct turbocharger
4) Exhaust sustem basics
5) Wastegate installation and optimal performance

Who wants to start?
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Old 12-03-2010, 06:41 PM   #2
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Default Re: Fuck it... Turbocharging 102: Turbo system design

You must be feeling better.
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Old 12-03-2010, 06:41 PM   #3
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Default Re: Fuck it... Turbocharging 102: Turbo system design

Subscribing....thinking about coverting from nitrous to turbo down the road. Thanks.
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Old 12-03-2010, 06:42 PM   #4
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Default Re: Fuck it... Turbocharging 102: Turbo system design

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You must be feeling better.
I'm getting there slowly but surely. That medicine almost took the life outta me.
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Old 12-03-2010, 06:43 PM   #5
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Default Re: Fuck it... Turbocharging 102: Turbo system design

I would start,but I know shit about turbos. Have been thinking about a turbo BBC in a foxbody.
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Old 12-03-2010, 06:44 PM   #6
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I would start,but I know shit about turbos. Have been thinking about a turbo BBC in a foxbody.
Have you read maximinum boost?
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Old 12-03-2010, 06:45 PM   #7
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Default Re: Fuck it... Turbocharging 102: Turbo system design

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Have you read maximinum boost?
Nope. Is it a book? If so,where do I get it?
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Old 12-03-2010, 06:56 PM   #8
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Default Re: Fuck it... Turbocharging 102: Turbo system design

1) Header design, Size and construction

- Header design is a very important piece in the turbocharger system. Many people ask if the header tubes need to be equal or unequal length. The best headers would be designed to be equal length with the smallest tube size that will work with the given engine combo. There is really no gain by going to a larger header tube like a NA motor, actually it has been documented to that a larger header tube will slow the velocity of the exhaust gas and reduce the speed that the turbo spools. Thick qualify flanges should be used, 4 bolt or v-band clamps should be used between the header and crossover tube to ensure a leakfree connection. Coating or header wrap will help retain the heat in the header tubes and should be used. As far as sizing... We've used 1 3/4" on a 438" and had very good results. I'd almost recommend going to a smaller tube on a 370-380", maybe a 1 5/8" or 1 1/2". The key is making sure the exhaust tube does not shroud or block the port exit at the cylinder head. The overall sizing of the header tube will play more into turbo spooling than anything else. The idea is to keep the exhaust gas velocity high but there is a point where it exceeds the speed of sound and the exhaust gases start doing some funny things.

Please feel free to correct, add or tell me to shut the fuck up.

Last edited by 95mmRenegade; 12-03-2010 at 06:58 PM.
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Old 12-03-2010, 06:58 PM   #9
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Default Re: Fuck it... Turbocharging 102: Turbo system design

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Nope. Is it a book? If so,where do I get it?
http://www.amazon.com/Maximum-Boost-.../dp/0837601606+
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Old 12-03-2010, 06:59 PM   #10
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Default Re: Fuck it... Turbocharging 102: Turbo system design

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tell me to shut the fuck up.

OK!!!!LOL

You asked for that one Phil!!!!
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Old 12-03-2010, 07:14 PM   #11
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Default Re: Fuck it... Turbocharging 102: Turbo system design

Thank buddy! LOL
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Old 12-03-2010, 07:16 PM   #12
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Default Re: Fuck it... Turbocharging 102: Turbo system design

This should make for a great read! lol
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Old 12-03-2010, 07:18 PM   #13
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Default Re: Fuck it... Turbocharging 102: Turbo system design

Quote:
Originally Posted by 95mmRenegade View Post
This thread will be dedicated to turbo system setup and design. Lets discuss

1) Header design, Size and construction
2) Crossover tube design, size and construction
3) How do you choose the correct turbocharger
4) Exhaust sustem basics
5) Wastegate installation and optimal performance

Who wants to start?
383ci sbc chevy

1) 1" 5/8th headers non equal length

2)2.5" for cross over Y pipe design..i've thought about maybe when it gos from 2 to 1 pipe to use 3" for that section..not sure if it would be good or not

3) 88 large frame with t6 with 1.32 a/r if bw..not sure a/r for a pt or garret..but i know from just reading a ton of info that is the optimal size turbo for that size motor.

4) exh would be down pipe really with it being 45 degrees coming off the ass end of the turbo seeing it would be a front mount and then angled cut down..pipe length would probley be 2' long probley

5)waste gate would be placed at the leading curve of the 90 going into the turbo..that way its a straight shot out


everything would be v band clamped at all the joints..



Now pick it apart turbo gurus
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Last edited by Suicidal Racing; 12-03-2010 at 07:21 PM.
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Old 12-03-2010, 07:20 PM   #14
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Default Re: Fuck it... Turbocharging 102: Turbo system design

Quote:
Originally Posted by 95mmRenegade View Post
1) Header design, Size and construction

- Header design is a very important piece in the turbocharger system. Many people ask if the header tubes need to be equal or unequal length. The best headers would be designed to be equal length with the smallest tube size that will work with the given engine combo. There is really no gain by going to a larger header tube like a NA motor, actually it has been documented to that a larger header tube will slow the velocity of the exhaust gas and reduce the speed that the turbo spools. Thick qualify flanges should be used, 4 bolt or v-band clamps should be used between the header and crossover tube to ensure a leakfree connection. Coating or header wrap will help retain the heat in the header tubes and should be used. As far as sizing... We've used 1 3/4" on a 438" and had very good results. I'd almost recommend going to a smaller tube on a 370-380", maybe a 1 5/8" or 1 1/2". The key is making sure the exhaust tube does not shroud or block the port exit at the cylinder head. The overall sizing of the header tube will play more into turbo spooling than anything else. The idea is to keep the exhaust gas velocity high but there is a point where it exceeds the speed of sound and the exhaust gases start doing some funny things.

Please feel free to correct, add or tell me to shut the fuck up.
Gases don't really flow faster than the speed of sound. At the speed of sound gases are get kinda stall from the turbulence of the sound barrier.
One big think to remember is the speed of sound increases substantially when pressure is increased. So basically when the exhaust approaches the speed of sound it has to increase in pressure to flow faster.
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Old 12-03-2010, 07:32 PM   #15
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Default Re: Fuck it... Turbocharging 102: Turbo system design

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Originally Posted by Bartman2 View Post
Gases don't really flow faster than the speed of sound. At the speed of sound gases are get kinda stall from the turbulence of the sound barrier.
One big think to remember is the speed of sound increases substantially when pressure is increased. So basically when the exhaust approaches the speed of sound it has to increase in pressure to flow faster.
by this reasoning a large tube header will spool the same as a small tube. pressurely thinking of course...
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