• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

2005 GXP Big Turbo Build **Street & Strip**

If someone sold a subframe I could just bolt a 3800 and a 4t80 to I would kiss them then start throwing money at them

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bfurches said:
We are actually making our mounts modular. The concept is to have 2/3 piece mounts all the way around. This would allow us to run an isolator in-between (read polyurethane) for street cars, or a solid insert for race applications. As you mention, that will also have the added benefit of being able to adjust drivetrain height in relation to axle centerline which I didnt even think about. Awesome point.

I would like to offer this package as a full conversion if I get all the details squared away, so I am trying to think a few steps ahead haha
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Beat you to it.



 
ADecker said:
If someone sold a subframe I could just bolt a 3800 and a 4t80 to I would kiss them then start throwing money at them

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ive been saying this since at least janurary and no one believes me people will buy them.......
 
aww cmon man people still dont believe a 4t80 is a real option over a mega buck gmr trans ohh wait speaking of dont you have one???? sure would have been nice to buy like 12 4t80s instead huh? LOL.

and whats this you mean it even might possibly sorta work with a ls4 no fvcking ways!!!!
 


Give Dave some time to make a few upgrades to the valve body. I'll work out some electronics on the OS side and boom lol

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Again I asked for a modular bolt to subframe mount kit ages ago..... Then the end user would also have the ability to weld it to the subframe if they choose. Basically a mount kit setup and some kind of template or measurement diagram that says this goes here drill holes here....... Or weld in place.

Plus a mount kit/template would eliminate the need to ship entire cradles.......
 
I have a design that clears the 1st gen w steering rack n subframe but yer limited to 1/4" adjustments.
keep in mind I set these up for a take no prisoners tube chassis, thats why there's extra girdle pieces to brace the outboard diff bearing. the rears I designed for the w since it may be a better design for aluminum subframe.

 


bfurches said:
Absolutely beautiful setup. I like it a lot!
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ADecker said:
Turbocharged make me some weld on mounts... :P

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ya'll interested? its 3/8 and 1/4 6061 but the rears havent been sat into a stock subframe but you can see the rear trans brackets are setup for a tight to the trans fit for tabs off the subframe for solid mounting.

i do have a few of my older brackets, they are oversized, sorta cut to fit but both are at the same zero reference height so its easy to align em.

i had actually figured on going for pancake bushing mounts on the rear subframe brackets that bolt to the trans plates, that way the only subframe mod is drilling two holes.

i found a better pic, only thing not visible is the jacking screw

 
I need to do some research into the electrical side especially the 2-3 shift. Is it true its lazy? Or what's the news on that side of things

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inverting the shift solenoid is easy enough but dave has his modified bin.
i have the gm 4t80e guide. working on a pump valve that uses the secondary pump more, but its also difficult to get to the 3rd accumulator.

plus the initial condition maters quite a bit. we have a whole thread on tcg
 


yup

AFL and pressure regulator bores also exibit the same wear and tear the 65e see's and the associated problems.

im not worried about the 3rd accumulator as id want to tear it down and change out the vb with a reman and changup the boost valve. I was talking to dave about having him do a run of 80e vb's while I make a boost valve with more/faster rise in 2ndary pumping. I can make the spool long enough that both pumps run constantly and it can be ground away on a bench grinder to dial it back. that with a stiffer spring and even with worn vb bores youd have enough fluid volume for even a 180k 80e.

I have faith dave will work towards 80e stuff, I sorta have a personal interest in this lol

I really want to figure on a trans brake and that's a major reason I got the gm guide with the foldout hydro diagrams.

some light reading

http://www.thechicagogarage.com/forum/midwest3800s/27992-4t80e-4t60-65-hd.html
 
I'm making the switch for sure just need to research some of that stuff and talk with Dave about getting some stuff done on an 80e

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So from reading third is still a major issue; however, with the sonax VB and dropping some spacers in the accumulator should fix the issue?

Also how does the input shaft hold up?
 
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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