K5 Blazer Forums  
Home of the 1969-91 K5 Blazer/Jimmy including GM Trucks and Suburbans.  
Go Back   CK5 Forums > Technical Discussion > 69-72 K5/Suburban/Truck

Remove these ads.

Reply
 
Thread Tools Display Modes
Old 04-21-2009, 08:02 AM
Posted in reply to bigblock72's post starting "The 406 ran good and everything worked..."
  #61
GRINCH
Supporting Member
Registered User
 
GRINCH's Avatar
 
Join Date: Jan 2001
Location: Helena, MT
Posts: 1,952

i Trader: (0 )

Quote:
Originally Posted by bigblock72 View Post
4l80e (I like 700r4s but I can't build one to hold up to that much power, period)
How much power do you think the 4L80e will hold up too? I have a 400 for my project and was looking for a OD that will handle my caddy motor. Est about 500-600 Lbs of Torque and HP around 400+.
GRINCH is offline   Reply With Quote
Sponsored Links



Remove these ads.
Old 04-21-2009, 09:30 AM
Posted in reply to GRINCH's post starting "How much power do you think the 4L80e..."
  #62
bigblock72
Supporting Member
Registered User
 
bigblock72's Avatar
 
Join Date: Oct 2005
Location: American Fork, Utah
Posts: 1,068

i Trader: (1 )

GM of the month Winner
Quote:
Originally Posted by 90k5blaze View Post
How much power do you think the 4L80e will hold up too? I have a 400 for my project and was looking for a OD that will handle my caddy motor. Est about 500-600 Lbs of Torque and HP around 400+.


I don't know what the absolute limits of a stock 4l80 are. I do know the supercharged 454 in my dually makes close to 600 ft lbs and the trans is still hanging in there even with regular 10k loads and having 180,000 on the clock.


I feel comfortable saying that a 4l80 in good condition will easily handle your caddy motor.
__________________
71 Blazer with some stuff to make the 37s turn round and round.
http://coloradok5.com/forums/showthread.php?t=222300

72 K10: the garage queen

94 C3500 dually 454 w/whipple

01 Yukon XL 8.1 stock
bigblock72 is offline   Reply With Quote
Old 04-21-2009, 05:59 PM
Posted in reply to bigblock72's post starting "I don't know what the absolute limits..."
  #63
AJs72K5
Supporting Member
Registered User
 
AJs72K5's Avatar
 
Join Date: Sep 2007
Location: South Tx
Posts: 1,365

i Trader: (3 )

The 700r4 I got from Monster Transmission is supposed to be rated at 630HP. They didn't give a torque rating though. I should prolly call them before I spec out the build on the 454.
__________________
- AJ

Cruiser Crawler Build - 1972 K5 with some stuff
AJs72K5 is offline   Reply With Quote
Old 04-21-2009, 07:44 PM
Posted in reply to AJs72K5's post starting "The 700r4 I got from Monster..."
  #64
bigblock72
Supporting Member
Registered User
 
bigblock72's Avatar
 
Join Date: Oct 2005
Location: American Fork, Utah
Posts: 1,068

i Trader: (1 )

GM of the month Winner
Quote:
Originally Posted by AJs72K5 View Post
The 700r4 I got from Monster Transmission is supposed to be rated at 630HP. They didn't give a torque rating though. I should prolly call them before I spec out the build on the 454.


The problem with 700s isn't so much the limits of the clutch packs, it's more to do with the input and output shafts. I generally like to stick with 500 ft lbs as the max with stock input and output shafts. Not to say that they won't hold up with more, it all depends.

I've seen stock station wagons break input shafts/drums and I've also seen 4,000 lb cars run 11s with stock stuff. Some of it is luck. The rest is how the vehicle is used, weight, engine torque etc.

On your rig I'd say if you keep the stock cylinder heads, use a streetable cam and compression you'll probably be safe. You don't seem to beat the rig too hard so it should be ok.
__________________
71 Blazer with some stuff to make the 37s turn round and round.
http://coloradok5.com/forums/showthread.php?t=222300

72 K10: the garage queen

94 C3500 dually 454 w/whipple

01 Yukon XL 8.1 stock
bigblock72 is offline   Reply With Quote
Old 04-22-2009, 07:38 AM
Posted in reply to bigblock72's post starting "I don't know what the absolute limits..."
  #65
Greg72
"Might As Well..."
 
Greg72's Avatar
 
Join Date: Mar 2001
Location: The Granite State
Posts: 13,831

i Trader: (10 )

The 4L80E is a direct descendant of the TH400.

TH400s have been used for ages in drag cars, and all sort of high-HP applications. The correct way to build them for ludicrous power is well-understood....

If there is a weakness, I can think of only 2:

1. HP loss through the transmission is pretty high (54HP), and a bit worse than a 700R4 (42HP)

2. 4L80E is expensive, especially with a standalone controller... probably around $3000-$3500 by the time you've got it bolted in with a good TC.



__________________
1972 K5 - 502BBC/4L80E/ATLAS4/Mog-9s/4-link rear/3-link front/5.26s/38" BFG KM2s -> Click here to view the "Might As Well" build thread...

"...attention to detail combined with near-retarded levels of awesome..." - Z71paramedic
.
.

Last edited by Greg72; 04-22-2009 at 01:05 PM. Reason: Corrected HP Loss figures...
Greg72 is online now   Reply With Quote
Old 04-22-2009, 10:42 AM
Posted in reply to Greg72's post starting "The 4L80E is a direct descendant of the..."
  #66
GRINCH
Supporting Member
Registered User
 
GRINCH's Avatar
 
Join Date: Jan 2001
Location: Helena, MT
Posts: 1,952

i Trader: (0 )

Quote:
Originally Posted by Greg72 View Post
The 4L80E is a direct descendant of the TH400.

TH400s have been used for ages in drag cars, and all sort of high-HP applications. The correct way to build them for ludicrous power is well-understood....

If there is a weakness, I can think of only 2:

1. HP loss through the transmission is pretty high (35HP), but still not as bad as a 700R4 (54HP)

2. 4L80E is expensive, especially with a standalone controller... probably around $3000-$3500 by the time you've got it bolted in with a good TC.



Make that 3... No OD...
GRINCH is offline   Reply With Quote
Old 09-12-2009, 05:54 PM
Posted in reply to GRINCH's post starting "Make that 3... No OD..."
  #67
AJs72K5
Supporting Member
Registered User
 
AJs72K5's Avatar
 
Join Date: Sep 2007
Location: South Tx
Posts: 1,365

i Trader: (3 )

Been a long time since we saw an update here. What have you been up to?
__________________
- AJ

Cruiser Crawler Build - 1972 K5 with some stuff
AJs72K5 is offline   Reply With Quote
Old 09-24-2009, 10:41 PM
Posted in reply to AJs72K5's post starting "Been a long time since we saw an update..."
  #68
bigblock72
Supporting Member
Registered User
 
bigblock72's Avatar
 
Join Date: Oct 2005
Location: American Fork, Utah
Posts: 1,068

i Trader: (1 )

GM of the month Winner
Quote:
Originally Posted by AJs72K5 View Post
Been a long time since we saw an update here. What have you been up to?


Mostly life, really.

It has been super crazy in the shop and plenty going on at home as well. I was hoping to have this all together for Blazer Bash but it didn't happen.


The biggest problem has been how this whole project snowballed almost uncontrollably. It started out as a motor and adding on to the cage in the engine compartment and turned into replacing everything.


Enough of that so here are some progress pics.
Attached Images
File Type: jpg 100_0893.JPG (223.0 KB, 4 views)
File Type: jpg 100_0897.JPG (188.4 KB, 3 views)
File Type: jpg 100_0902.JPG (199.0 KB, 4 views)
File Type: jpg 100_0903.JPG (215.0 KB, 5 views)
File Type: jpg 100_0905.JPG (168.1 KB, 4 views)
__________________
71 Blazer with some stuff to make the 37s turn round and round.
http://coloradok5.com/forums/showthread.php?t=222300

72 K10: the garage queen

94 C3500 dually 454 w/whipple

01 Yukon XL 8.1 stock
bigblock72 is offline   Reply With Quote
Old 09-24-2009, 10:49 PM
Posted in reply to bigblock72's post starting "Mostly life, really. :p: It has..."
  #69
bigblock72
Supporting Member
Registered User
 
bigblock72's Avatar
 
Join Date: Oct 2005
Location: American Fork, Utah
Posts: 1,068

i Trader: (1 )

GM of the month Winner
The front end is out of a 06ish Super duty. It took a whole day for Dad and I to cut and grind all of the brackets off and prep it to install. I hope to never have to do that again!!!!

The track bar and drag link were set up at full compression since the clearance on the oil pan is so tight. Looks like I'll have a little over 5 inches of compression travel and still have a half inch of clearance between the oil pan and track bar. That leaves about 11 inches of extension travel in the coilovers. Looks like with the high pinion the driveshaft will be ok with that much travel.
__________________
71 Blazer with some stuff to make the 37s turn round and round.
http://coloradok5.com/forums/showthread.php?t=222300

72 K10: the garage queen

94 C3500 dually 454 w/whipple

01 Yukon XL 8.1 stock
bigblock72 is offline   Reply With Quote
Old 09-24-2009, 10:56 PM
Posted in reply to bigblock72's post starting "The front end is out of a 06ish Super..."
  #70
bigblock72
Supporting Member
Registered User
 
bigblock72's Avatar
 
Join Date: Oct 2005
Location: American Fork, Utah
Posts: 1,068

i Trader: (1 )

GM of the month Winner
As a side note I side tracked myself (ADD?) with my pickup. I thought since it hadn't been started or moved in 4 or 5 years it was probably time to break it out and put it back together. I forgot how much fun it is to drive. The big block still makes short work of the 35s.

I might start another thread on it when the Blazer is up and running.
Attached Images
File Type: jpg 100_0861.JPG (169.0 KB, 3 views)
__________________
71 Blazer with some stuff to make the 37s turn round and round.
http://coloradok5.com/forums/showthread.php?t=222300

72 K10: the garage queen

94 C3500 dually 454 w/whipple

01 Yukon XL 8.1 stock
bigblock72 is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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

Forum Jump


All times are GMT -7. The time now is 11:15 AM.


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.