4T80E/Turbo-S/C... TIME FOR A NEW THREAD? - Page 11 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 02-03-2007, 12:10 PM   #101
Junior Member
Posts like a Ricer Type-R
 
Join Date: Jul 2004
Location: cleveland, Ohio
Posts: 21
Thanks: 0
Thanked 0 Times in 0 Posts
GTPMORAD is on a distinguished road
Default

Hell of a project Jeff! Looks like you spent alot of time on this. I hope all the hard work pays off.

The pics of the diffs side by side are amazing. My first thought after reading through this whole thread is that this wont ever be done again. lol
GTPMORAD is offline   Reply With Quote
Old 02-03-2007, 02:41 PM   #102
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2005
Location: Atlanta, GA. USA
Posts: 368
Thanks: 0
Thanked 0 Times in 0 Posts
pontiacjeff is on a distinguished road
Default

Quote:
Originally Posted by GTPMORAD
H*** of a project Jeff! Looks like you spent alot of time on this. I hope all the hard work pays off.

The pics of the diffs side by side are amazing. My first thought after reading through this whole thread is that this wont ever be done again. lol
I will be looking to put an -80 in a GTP next...
pontiacjeff is offline   Reply With Quote
Old 02-03-2007, 02:44 PM   #103
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2005
Location: Atlanta, GA. USA
Posts: 368
Thanks: 0
Thanked 0 Times in 0 Posts
pontiacjeff is on a distinguished road
Default

Quote:
Originally Posted by GonneVille
Interesting turbo. You got full specs on it?
I took a shot in the dark on this one. No specs were given. I'll have to get it apart when it arrives to see if it'* even close to the real Garrett GT-42. If it is, that'* what I was looking for. If it'* not, I'll put it back on ebay for $350.00! LOL!!!!!!!
pontiacjeff is offline   Reply With Quote
Old 02-06-2007, 01:10 AM   #104
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2005
Location: Atlanta, GA. USA
Posts: 368
Thanks: 0
Thanked 0 Times in 0 Posts
pontiacjeff is on a distinguished road
Default

I finished the left rear transmission mount today. I butchered the stock Bonne 4T60/65E trans mount and welded a huge bracket to it that bolts across the back of the -80 and around the left side using two side cover bolts (replaced the bolts with studs). Sorry, no pic yet. I have two more rubber mounts coming in the morning to build the left front and right rear. I will likely run one upper dogbone using the right side w-body dogbone bracket (engine) and an early (88-96) w-body core support bracket. The short one from a 3400DOHC car and the appropriate length bone to fit. I always replace the rubber with urethane.

Pics Tuesday.
pontiacjeff is offline   Reply With Quote
Old 02-06-2007, 01:16 AM   #105
Senior Member
Posts like a Camaro
 
Join Date: Jun 2005
Posts: 1,108
Thanks: 0
Thanked 0 Times in 0 Posts
chadow427 is on a distinguished road
Default

Wow.....how many different car parts are in this project? lol...
chadow427 is offline   Reply With Quote
Old 02-06-2007, 12:03 PM   #106
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2005
Location: Atlanta, GA. USA
Posts: 368
Thanks: 0
Thanked 0 Times in 0 Posts
pontiacjeff is on a distinguished road
Default

Quote:
Originally Posted by chadow427
Wow.....how many different car parts are in this project? lol...
"Keep Your GM Car All GM!"
pontiacjeff is offline   Reply With Quote
Old 02-08-2007, 02:34 AM   #107
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2005
Location: Atlanta, GA. USA
Posts: 368
Thanks: 0
Thanked 0 Times in 0 Posts
pontiacjeff is on a distinguished road
Default

The engine and transmission are mounted to the frame using four motor mounts.

Stock 87-91 front engine mount and modified engine bracket (removed a/c part), modified stock left rear transmission mount with custom transmission bracket, BMW engine "puck" mount in the left front and right rear positions with custom transmission ans frame mounting.

The engine sits perfectly level, side to side, and a is about a 1/4" lower in the rear (most every GM FWD car i have ever worked on, the transmission pan has a slight rearward tilt). The transmission output shafts are dead-on parallel to the LBJ and equi-distant from the hubs (w/in 1/16").

It took alot of moving around until I was satisfied with the location. I slotted the hols in the right front engine mount (about 1/2") to move the engine away from the steering rack a tad. I think it would still line up perfect with the stock torque-axis mount. The guy who works with me said I should retain the t-a mount as a "dogbone" instead of adding the upper dogbone, but I hate the d*mn thing - makes putting belts on the engine a real PITA.

I have yet to scrub and paint the k-member before I mount the engine for the final time. Then it'* in the car tomorrow.

All I have to do is make a wiring harness for the 97 pcm to the transmission plug. I already have the 97 program modified to runthe engine and transmission..

Oh, the turbo will arrive Thursday, so I can finish the exhaust system, wastegate, downpipe, etc. I don;t run a cat, instead a 4" bullet-style race muffler into dual pipes and two 3" bullet-style mufflers in the rear.
pontiacjeff is offline   Reply With Quote
Old 02-17-2007, 01:00 AM   #108
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2005
Location: Atlanta, GA. USA
Posts: 368
Thanks: 0
Thanked 0 Times in 0 Posts
pontiacjeff is on a distinguished road
Default

Well, the drivetrain is installed in the car! All the wiring is hooked up. I made a transmission harness with wires from a GTP harness. The stock Eldo-Seville axles worked perfect! The 4-mount system is going to work fine, I still might use the single GTP r.*. dogbone (see bracket in the pics)

I relocated the computer to the battery side. I will build a small box to enclose it. The wiring harness reached all the way over with no mods at all! A couple wire-ties will hold it secure. I need to extend about 4 wires I made too short for the trans harness so it will reach, too.

The turbo installation is starting, too. That'* why I relocated the computer. I will have the turbo mounted tomorrow. I decided to use the china turbo. I will be using a fmic, so if it does come apart, the trash won't make it to the engine (I'll keep the MAF screen in just to be safe! LOL!)

That turbo is not a GT42 copy, more like a GT40. But not really that either. It'* 2.46" inducer is about 62mm and the 3.30" exducer is about 84mm. So it'* like a GT4084, which Garrett doesn't make. No bother... it was only 180 bucks!

I installed the 50# injectors today, too. I am having the intercooler "plates" finished next week for the under blower ic. I already have the core I'm using (Probe heater core). It won't be water going thru it, though... more on that later.







pontiacjeff is offline   Reply With Quote
Old 02-17-2007, 01:31 AM   #109
Senior Member
Posts like a Camaro
 
Join Date: Jun 2005
Posts: 1,108
Thanks: 0
Thanked 0 Times in 0 Posts
chadow427 is on a distinguished road
Default

Hurry up and git'r done!! I wanna see this thing roll!
chadow427 is offline   Reply With Quote
Old 02-17-2007, 06:28 PM   #110
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2005
Location: Atlanta, GA. USA
Posts: 368
Thanks: 0
Thanked 0 Times in 0 Posts
pontiacjeff is on a distinguished road
Default

This turbo I bought is NOT a GT42 clone. They called it GT42, but it'* more like a GT40. The wheel dimensions are as follows:

compressor: 2.46 inducer, 3.320 exducer, 55-trim
turbine: 3.20 inducer, 2.77 exducer, 75-trim
compressor A/R: unknown (likely .70 like the real GT42 )
turbine A/R (as advertised): 1.10

The turbine was full of metal from the machining process, I'll have to clean everything real good before attempting to use it. My apprentice and I played rock-paper-scissors and I lost, which means I will use it. If it takes a dump, it'll have an intercooler and MAF screen to catch the trash... if the bearings start to go away, it'll start smoking before it finally takes a dump. I'll have ot keep close eye on it.
pontiacjeff is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Thread locker vs. Thread sealant eazhar 1992-1999 3 03-23-2013 04:43 AM
Turbo L67 Ciera International.....and Turbo L36 S10 Bonneville92V688 Lounge 10 10-05-2007 03:43 PM
Transmission tuner for 4t80e sahensley Bonneville GXP/ Northstar Powered Cars 10 05-25-2005 07:07 PM
4t80e pbj General GM Chat 3 07-28-2003 06:23 AM
911 Twin Turbo vs. me w/ only ONE turbo Burgundy_Boat General GM Chat 11 06-28-2003 09:34 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 04:31 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.