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Twin Turbo 408 Trans Am

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Old 06-07-2014, 09:26 PM
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Default Twin Turbo 408 Trans Am

Old 06-07-2014, 09:43 PM
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What turbos?
Old 06-07-2014, 10:10 PM
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T4 T-76 .81

Notice the A/C condenser still mounted? :-)

Goal was 1200 horsepower with all creature comforts.
Full Leather, adjustable bolsters, Power Steering(Guess where the pump is), Airbags, A/C, ABS, Traction control (Even though I have a narrowed MWC 9" rear end)
etc etc...the list goes on and on... Lots of stuff relocated or replaced. The average person looks at that pic and wont see notice all the stuff thats supposed to be there.

Last edited by sschoeffler; 06-07-2014 at 10:18 PM.
Old 06-07-2014, 10:52 PM
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I'm happy to see you made those ebay headers work for you. That symmetrical setup looks niiice. I will probably go the same route when I do my twin turbo build, as I want to retain AC. Any plans for header wrap, or ceramic coating?
Old 06-07-2014, 11:17 PM
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After all the welds are finalized I will have everything ceramic coated. I'm not a welder so I had to have someone do the welding for me. I pick the car up this Tuesday. Welding will be finalized then.
I still have to fabricate a tank for the rear passenger side where the coolant will reside for the air to water intercoolers. Bracket for the cruise control motor needs to get implemented and installed. Also need to get a bracket put in for the new canister for the PCV system.
Also on Tuesday I will have access to the lift the car is on so I can complete my fuel lines. Once that is done I will take the car to a hydraulic hose place and get custom lines fabricated for the electric power steering pump.
Old 06-07-2014, 11:39 PM
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hopefully you've got some form of flex joint on the WG dumps into the DP Because all that **** is going to shrink when you weld it
Old 06-07-2014, 11:40 PM
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Here are some pics of the progress







Old 06-08-2014, 12:28 AM
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Old 06-08-2014, 10:30 AM
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That hot side piping is less than ideal.. fab work looks good though.
Old 06-08-2014, 10:34 AM
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Originally Posted by Mel Carlson
hopefully you've got some form of flex joint on the WG dumps into the DP Because all that **** is going to shrink when you weld it


You don't use flex joints to combat welding shrinkage in fabrication. I mean you could but it would be a waste of money, Any decent fabricator can mock/weld something up without it shrinking. The main purpose of the flex joint is for comabting heat expansion during heat cycles. Not to mention that many many people including myself don't run flex joints and never have an issue.

Last edited by oscs; 06-08-2014 at 10:42 AM.
Old 06-08-2014, 10:55 AM
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I never ran them either but they wouldn't hurt
Old 06-08-2014, 11:09 AM
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Originally Posted by oscs
That hot side piping is less than ideal.. fab work looks good though.
Not quite sure what else could have been done besides building some one off headers. Remember, those headers started their life as these. .



and progressed into

Old 06-08-2014, 11:18 AM
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Originally Posted by sschoeffler
Not quite sure what else could have been done besides building some one off headers. Remember, those headers started their life as these. .



and progressed into



Sorry what i meant to say was that given your space/situation you did well. The twist style hot side is less than ideal.
Old 06-08-2014, 11:40 AM
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I see what you're saying OSCS, but less than ideal is sometimes a concession we have to make when you're trying to achieve an overall goal like he did with keeping a/c, heater, power steering etc.

So it's not optimized for the highest performance, but I'm sure he'll be more than happy with the results.

It's like the inlets for the fbody prochargers. Drop the inlet hat, and you gain a fair bit, but at the expense of filtering the air going into the blower.
Old 06-08-2014, 11:50 AM
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Originally Posted by The Alchemist
I see what you're saying OSCS, but less than ideal is sometimes a concession we have to make when you're trying to achieve an overall goal like he did with keeping a/c, heater, power steering etc.

So it's not optimized for the highest performance, but I'm sure he'll be more than happy with the results.

It's like the inlets for the fbody prochargers. Drop the inlet hat, and you gain a fair bit, but at the expense of filtering the air going into the blower.
Exactly! thats more or less what i was trying to say I guess it just came out wrong.
Old 06-08-2014, 12:19 PM
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I'm guessing spark plug changes are done from underneath the car?
Old 06-08-2014, 01:41 PM
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Still room up top for plug changes
Old 06-08-2014, 09:40 PM
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#1) Re-located the oil fill cap
#2) Re-Located the new A/C Drier under the front bumper
#3) Mounting the cruise control motor on the front passenger side head
#4) Fan shroud from a 2010 Saab 9-3 Turbo with a manual transmission, fits the griffin radiator almost perfectly, Moves over 3000CFM
#5) Upgraded stock 102 amp alternator to a 145 amp alternator off a 2003 Escalade
#6) Removed the stock pully driven power steering pump and installed an electric power steering pump off a 2008 Saturn Astra. Its now located on the passenger side frame horn
#7) Re-located 4 channel ABS block to the drivers side frame horn. All brake lines are now made of braided SS and relocated as well.
#8) Fuse box is now re-located under the dash
#9) Cruise control module is now located under the drivers side frame



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