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2005 Grand Prix GXP Buid **Street & Strip**

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Old 06-14-2015, 08:26 AM
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How do you plan to address the rear bank headers?
Old 06-14-2015, 08:41 AM
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Originally Posted by texasGXP08
How do you plan to address the rear bank headers?
there's a lot of room when you have no need for a downpipe off the turbo
Old 06-14-2015, 12:22 PM
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Originally Posted by bfurches
Btw...fits the frame rails just fine guys



Pick up a 6T75 and see if it fits. If you were close, I'd let you try mine that's sitting in the garage. You would need an adapter plate though.

Alternatively, you could pick up a 6T70 as that would bolt right up.
Old 06-14-2015, 01:37 PM
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Originally Posted by GXP25
Pick up a 6T75 and see if it fits. If you were close, I'd let you try mine that's sitting in the garage. You would need an adapter plate though.

Alternatively, you could pick up a 6T70 as that would bolt right up.
if you have a 6t75 don't waste time get a LS2 or truck block and bolt it up. Cranks will need swapping or machining. But that's it
Old 06-14-2015, 05:24 PM
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Originally Posted by 91parkave
if you have a 6t75 don't waste time get a LS2 or truck block and bolt it up. Cranks will need swapping or machining. But that's it
I've had the 6T75 for a couple of years now but I'm not so sure what you're talking about.

The 6T75 also needs an adapter plate to mate to an LS2.
Old 06-14-2015, 05:52 PM
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Originally Posted by GXP25
I've had the 6T75 for a couple of years now but I'm not so sure what you're talking about.

The 6T75 also needs an adapter plate to mate to an LS2.
It's either one or the other if the 6t70 used the metric housing than the ls2 won't bolt o as you mentioned but if the 6t75 is a standard bell housing pattern than the ls2 will bolt up
Old 06-14-2015, 06:24 PM
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Originally Posted by 91parkave
It's either one or the other if the 6t70 used the metric housing than the ls2 won't bolt o as you mentioned but if the 6t75 is a standard bell housing pattern than the ls2 will bolt up
The LS2 will not bolt up to the 6T75. The 6T75 has the GM High Feature bolt patten which is different from the Metric bolt pattern (FWD 3800, LS4, etc.) and the RWD bolt pattern (LS engines, RWD 3800, etc.).

An adapter plate would be needed along with a new torque converter (4 bolt versus 3 bolt).

Electronics are done. We just need someone to fab everything up.

Axles and mounts exists due to the Impala. Fabrication would be needed for any extra stuff like shifter, starter, cooler lines, etc.
Old 06-14-2015, 06:45 PM
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like where this is going as in more options for us fwd guys,I'm tearing up man,lol not really so don't even think about it
Old 06-16-2015, 04:22 PM
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This weekend was a wash. Literally accomplished nothing had a few too many projects hanging over at the shop. Either way, hope to be back on it towards the end of the week. Working on a solution for the starter location
Old 06-19-2015, 11:56 AM
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Stopped down to Brandon's shop today(Furches Performance) and I was very impressed, I see good things happening for our platform with his build. He has much knowledge of these cars and judging by the cars in his shop he and his team do great custom work. Keep an eye out for sure on this one.
Old 06-19-2015, 09:25 PM
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Cant wait to see the final build and the numbers ya get.
Old 06-22-2015, 07:01 AM
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Originally Posted by rottonj
Stopped down to Brandon's shop today(Furches Performance) and I was very impressed, I see good things happening for our platform with his build. He has much knowledge of these cars and judging by the cars in his shop he and his team do great custom work. Keep an eye out for sure on this one.
Thanks for stopping by. It was nice meeting you and chatting for a few.
__________________________________________________ _________

Made some progress!

I located the motor in the chassis exactly where I wanted it and fabricated all the solid mounts. The front and rear mounts are 1-5/8 .083 wall chromoly tubing welded to 3/16 plates. The side transmission mount is fabricated from 3/16 plate and exteneds to the front of the subframe to help limit travel and distribute the additional weight. Overall I am very happy with the placement of the motor and the way the mounts came out.

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Old 06-22-2015, 07:07 AM
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Love it very creative, so essentially you used roll cage material with gusset plates and made all your mounts. Lookin good man,
Old 06-22-2015, 08:52 AM
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That is very slick - awesome work !!

The stock rear mount bracket braces the block to the trans, is there room / do you plan to fab something like that as well? Guess you'll have to drop power train on cradle to get at it.
Old 06-23-2015, 07:52 AM
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Originally Posted by x11 nut
That is very slick - awesome work !!

The stock rear mount bracket braces the block to the trans, is there room / do you plan to fab something like that as well? Guess you'll have to drop power train on cradle to get at it.
I am going to add an adjustable link just to brace the motor to transaxle. Nothing crazy.
__________________________________________________ ____________

This thing just keeps getting better!

I was on a roll last night so I pushed the car in, stayed late and hammered out the turbo mount with Casey. We fabricated a drain mount for the big S475 to support the weight. Check this thing out!

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We ended up going forward facing verse my previous idea for packaging reasons. Either way, I think it looks killer. Very happy with the outcome.
Old 06-23-2015, 08:23 AM
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Originally Posted by bfurches
I am going to add an adjustable link just to brace the motor to transaxle. Nothing crazy.
__________________________________________________ ____________

This thing just keeps getting better!

I was on a roll last night so I pushed the car in, stayed late and hammered out the turbo mount with Casey. We fabricated a drain mount for the big S475 to support the weight. Check this thing out!







We ended up going forward facing verse my previous idea for packaging reasons. Either way, I think it looks killer. Very happy with the outcome.
Are ypu guys going to be able to squeeze equal length logs in there to the turbo? If my eye is right did ypu weld an fittinga on truck rails? If so I need to send mine in to you
Old 06-23-2015, 08:31 AM
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Originally Posted by 91parkave
Are ypu guys going to be able to squeeze equal length logs in there to the turbo? If my eye is right did ypu weld an fittinga on truck rails? If so I need to send mine in to you
I really dont know if we are going to run v-banded cast manifolds or if I am going to build headers yet. Undecided at this point.

For the rails...the factory crossover/ feed was cut off and welded shut, then -8 fittingers were added to each end to make them dynamic. These were done by a friend of mine a long time ago and have just been sitting on the shelf, but I can do the same thing for you.
Old 06-23-2015, 08:40 AM
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Originally Posted by bfurches
I really dont know if we are going to run v-banded cast manifolds or if I am going to build headers yet. Undecided at this point.

For the rails...the factory crossover/ feed was cut off and welded shut, then -8 fittingers were added to each end to make them dynamic. These were done by a friend of mine a long time ago and have just been sitting on the shelf, but I can do the same thing for you.
Yea awesome I just never got around to fitting my aftermarket rails on and fabbing a hold down. Love the work though man. Top notch
Old 06-23-2015, 12:50 PM
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Excellent fab work - Luv'n the oil pass thru mount!!

Can you post some pics of the fuel rails?
Old 06-23-2015, 03:44 PM
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Originally Posted by x11 nut
Excellent fab work - Luv'n the oil pass thru mount!!

Can you post some pics of the fuel rails?
Thanks. The only other picture I have of the rails right now is when I had it mounted on the mock-up motor up stairs.

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