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" TURBO BUILDS " Post your Turbo build-Up or any that you have in process

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Old 09-08-09, 12:02AM   #46
DocsTA
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Yeah thats it pretty much.
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1979 Trans-Am Turbo Charged 535 IA2,
CV 1 heads with convertible exhaust option. 305cc, flowing 405cfm with mild intake port clean up


1979 Silver Anniversary 4 speed, numbers matching.
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Old 09-08-09, 01:40AM   #47
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its alot like using a fan in one room with a breeze to move another fan in a room with no breeze.

The fan in room 1 gets the breeze which turns it.
This fan spins the shaft which turns the other fan and creates a breeze in the other room.

The ratio between the two fans determines how fast the fan will turn in the other room and how much breeze it will make. But at some point the torque require to turn the fan is self defeating and thats where proper turbo sizing comes into play.
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old set up-3250 LBS 69 firebird T-88 turbo 455 .030 CAT H beam rods, stock crank, stock block( 2 bolt) performer intake, 850 carb 6X-6 heads 114 cc ( unported) TH 400 and 3.73 gears = 9.76 @ 141 with a 163 short time = 725 RWHP and 878 HP @ the crank

new set up - same but with home ported heads and Gen 7 DFI, my custom SS headers
Jeff Palazzo

Www.pontiaction.net
Www.mayhemturbo.com
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Old 09-09-09, 07:48PM   #48
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The process is so simple and takes no power from the engine to build boost. But, the turbo creates a restriction in the exhaust system by its impingng on the hot side (turbin) impeller. This is one factor where the turbo lag and turbo sizing comes in. The other lag factor is the sizing of the compressor side and how fast it can compress the total system into the motor. The other downsize is the heat that is produced by using the exhaust and making a restriction. Gach, sometimes you will see videos of a turbocharged engine on a dyno and the exhaust will get cherry red from the heat and restriction. Turbo cars are always fighting heat in the engine compartment. That's why some people go to a remote mount turbo system where the turbos are hung in the back of the car. Nice thing about turbos is thay can be mounted most anywhere and not dependent on attachment to the motor. Mark L
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Old 09-10-09, 01:12AM   #49
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A turbo is an exhaust driven centrifugal blower. A procharger or Vortech or Paxton is a belt driven centrifugal blower. Each has their pluses and minuses. Most often a turbo motor ends up with the fatter powerband. I havent seen solid proof that either will make more peak power than the other. From what I see though, it seems the turbo cars are fastest in the outlaw classes.
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Old 09-16-09, 05:29PM   #50
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Ok...Doc..if you or anyone else finds turbo threads/build ups, let me know
the section and the name of the thread and I'll move them here. Because I have no clue where they are, plus I'm not sure which is a blow thro or turbo build. Sound good.
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Old 09-16-09, 10:30PM   #51
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Gach a blow thru can be a turbo build or a blower build its just carbed instead of fuel injected and a draw thru is a carbed but with the carb on the other side of the carb.

I can move them if youd like.

I just need to find a little time this week. between work, my turbo build, family stuff.

It will give me something to do

I think GACH is going turbo soon!
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old set up-3250 LBS 69 firebird T-88 turbo 455 .030 CAT H beam rods, stock crank, stock block( 2 bolt) performer intake, 850 carb 6X-6 heads 114 cc ( unported) TH 400 and 3.73 gears = 9.76 @ 141 with a 163 short time = 725 RWHP and 878 HP @ the crank

new set up - same but with home ported heads and Gen 7 DFI, my custom SS headers
Jeff Palazzo

Www.pontiaction.net
Www.mayhemturbo.com
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Old 09-16-09, 11:13PM   #52
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You go a head and move them, I'll make you mod of the Turbo Build
section too.
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Old 09-16-09, 11:34PM   #53
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Quote:
I think GACH is going turbo soon!
As soon as the economy turns around, or I land another big job, I'll
make the move to either turbo or blow thro. I can see how easy it is
to make 1200-1300 hp. I'll have to get the compression down though
and see if I can get enough of a dish piston..with a 75 cc chamber head.
That might be tough to do. Have to figure out how much of a dish I would
need. 4.350 bore with 75 cc chamber and 4.250 stroke. I know a 4" stroke
would be a whole lot better.
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Old 09-17-09, 12:22AM   #54
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I knew it would only be a matter of time before the turbo/Blower bug bit you too!!

gach you should bring your car out this weekend. theres a car show at the airport in simsbury CT they call it the fly in and theres a huge airplane and car show.

Airobatics being flown and all kinds of cool things happening.
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old set up-3250 LBS 69 firebird T-88 turbo 455 .030 CAT H beam rods, stock crank, stock block( 2 bolt) performer intake, 850 carb 6X-6 heads 114 cc ( unported) TH 400 and 3.73 gears = 9.76 @ 141 with a 163 short time = 725 RWHP and 878 HP @ the crank

new set up - same but with home ported heads and Gen 7 DFI, my custom SS headers
Jeff Palazzo

Www.pontiaction.net
Www.mayhemturbo.com
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Old 09-17-09, 02:39AM   #55
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Quote:
Originally Posted by Gach View Post
As soon as the economy turns around, or I land another big job, I'll
make the move to either turbo or blow thro. I can see how easy it is
to make 1200-1300 hp. I'll have to get the compression down though
and see if I can get enough of a dish piston..with a 75 cc chamber head.
That might be tough to do. Have to figure out how much of a dish I would
need. 4.350 bore with 75 cc chamber and 4.250 stroke. I know a 4" stroke
would be a whole lot better.
You can get away with more compression if you run alcohol Gach.
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Old 09-18-09, 12:25AM   #56
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Gach whats the compression right now?
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old set up-3250 LBS 69 firebird T-88 turbo 455 .030 CAT H beam rods, stock crank, stock block( 2 bolt) performer intake, 850 carb 6X-6 heads 114 cc ( unported) TH 400 and 3.73 gears = 9.76 @ 141 with a 163 short time = 725 RWHP and 878 HP @ the crank

new set up - same but with home ported heads and Gen 7 DFI, my custom SS headers
Jeff Palazzo

Www.pontiaction.net
Www.mayhemturbo.com
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Old 09-18-09, 01:36AM   #57
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Gach, my Ross pistons made for my 400 turbo motor are dished to 20cc. That would get you to 95 cc in the chamber. Just guessing but I assume you are now at about 12 to 1. The 20cc would get you closer to 10 to 1 and the aluminum heads react like 9 to 1. With an intercooler that is a doable compression ratio. If you go to a blow thru carb the carb also adds a cooling affect as the air goes thru the venturi and brings the atomized fuel into the mix. This whole combo can run 9 to 1 easily. If you use racing gas (assuming a race car not full street) then you are in like flint. I run about 9.2 to 1 on my .030 455 with 6X heads at 97cc. I ran my TA on the dyno with swill 91 arizona gas, a too small air to water intercooler and the blow thru and ran 15 psi boost without a wimper. The shop/dyno owner stationed himself next to my motor to listen for detonation and said he heard nothing. He's an import and Mustang tuner and was very suprised at the numbers and the tune on the car for an archaic old carbed car. I do admit that the blow thru was recording WOT a/f ratios of 10.5 and 11 to 1 during the run, a little rich and probably help with the safe run. Mark L
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Old 09-19-09, 01:12PM   #58
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Doc, I don't know squat about turbos but isn't this set up going to melt everything in front of the radiator? Or do you have a plan to insulate most hot components? Just curious.
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Old 09-19-09, 01:20PM   #59
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Iwill have a turbo blanket on it and wrap the exhaust as well. If not, yes it would melt stuff.
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1979 Trans-Am Turbo Charged 535 IA2,
CV 1 heads with convertible exhaust option. 305cc, flowing 405cfm with mild intake port clean up


1979 Silver Anniversary 4 speed, numbers matching.
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Old 09-23-09, 01:36AM   #60
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Hey Doc, I think I have found an intercooler for you!

I think it will work fine but, not sure how you will hide it though?

Maybe Mark would like it?
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