8-Lug Truck Performance Duramax, 8.1L, and HD tech | Intakes | Exhaust | Tuning | Suspension | Drivetrain

LQ4 with 706's and a cam - pushrod length?

Thread Tools
 
Search this Thread
 
Old May 9, 2019 | 10:21 PM
  #1  
BOCEPHUS777's Avatar
Thread Starter
Teching In
 
Joined: May 2019
Posts: 8
Likes: 0
From: Maltby, WA
Default LQ4 with 706's and a cam - pushrod length?

Hey yall, new to the forum, I'm Shane. Good to meet ya.


Been thinking on doing a few things to the truck. I'm gonna start with cam & heads. There lies the problem. They sell them pushrod length checkers all day long, but what if you need to know that number ASAP. Like, order the proper length from the get go, so you can do the swap on the weekend and go back to work Monday? I'm trying to swap the cam and put some 5.3 heads on the 6.0, but I don't have the time off to set there and fiddle around with calculating pushrod length, and waiting for them to arrive once I know. The cam is a Comp 54-424-11. Lift is .553/.563. I'm shootin in the dark, hoping I hit ONE dude that's done this exact thing already, and knows.


Also. What thickness HG can I use to stay on pump gas with this?
Reply
Old May 9, 2019 | 11:10 PM
  #2  
FFDP's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: May 2014
Posts: 5,282
Likes: 600
From: Rogers, MN
Default

Run a stock head gasket.

I highly suggest larger injectors too depending on what it has now. The stock 25lb/hr are barely big enough for a stock 6.0, add a cam and you will push 90-95% or more duty cycle. Getting it tuned as soon as possible is needed too.

Sorry can't tell you exactly what push-rods to buy.
Reply
Old May 10, 2019 | 05:11 AM
  #3  
RySmDPT14's Avatar
Launching!
 
Joined: Aug 2017
Posts: 227
Likes: 14
From: Buffalo, NY
Default

Send Texas speed an email they know LS engines better than anyone.
Reply
Old May 11, 2019 | 08:58 AM
  #4  
BOCEPHUS777's Avatar
Thread Starter
Teching In
 
Joined: May 2019
Posts: 8
Likes: 0
From: Maltby, WA
Default

Good to know, thanks fellas!
Reply
Old May 11, 2019 | 12:33 PM
  #5  
madmann26's Avatar
TECH Addict
iTrader: (7)
 
Joined: Feb 2013
Posts: 2,985
Likes: 372
From: Somewhere north of 285, south of 985.
Default

7.4’s are a safe bet.

I think stockers were around 7.375.
Reply
Old Oct 13, 2020 | 01:26 PM
  #6  
Chad Day's Avatar
Registered User
 
Joined: Oct 2020
Posts: 4
Likes: 1
Default

Did you end up deciding what pushrod length to go with?
Reply
Old Oct 17, 2020 | 05:36 PM
  #7  
BOCEPHUS777's Avatar
Thread Starter
Teching In
 
Joined: May 2019
Posts: 8
Likes: 0
From: Maltby, WA
Default

Originally Posted by Chad Day
Did you end up deciding what pushrod length to go with?

Nope, still haven't tore it down yet...😂
Reply
Old Oct 17, 2020 | 06:30 PM
  #8  
Chad Day's Avatar
Registered User
 
Joined: Oct 2020
Posts: 4
Likes: 1
Default

Haha, well I talked to BTR and they said as long as you are keeping stock heads/rockers it should be a 7.400. I'm going to be tearing mine down at the end of the month, ill let you know how it goes and how it performs.
Reply
Old Oct 17, 2020 | 06:31 PM
  #9  
Chad Day's Avatar
Registered User
 
Joined: Oct 2020
Posts: 4
Likes: 1
Default

I'm going with the 706 heads and same cam as you, also lol
Reply
Old Oct 18, 2020 | 02:52 PM
  #10  
BOCEPHUS777's Avatar
Thread Starter
Teching In
 
Joined: May 2019
Posts: 8
Likes: 0
From: Maltby, WA
Default

Originally Posted by Chad Day
Haha, well I talked to BTR and they said as long as you are keeping stock heads/rockers it should be a 7.400. I'm going to be tearing mine down at the end of the month, ill let you know how it goes and how it performs.
Stock as in not aftermarket, or stock as in keeping the 317's?
Reply



All times are GMT -5. The time now is 05:11 AM.