GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

Cylinder Compression Test Numbers

Thread Tools
 
Search this Thread
 
Old 06-11-2013 | 04:18 AM
  #11  
AKlowriderZ71's Avatar
11 Second Hall Moniter
iTrader: (22)
 
Joined: May 2008
Posts: 11,651
Likes: 8
From: Wyoming
Default

Originally Posted by SlowDude
I have a lead on a slightly used EPS cam, cheap. 223/226 604/604 113+2 Good? Bad? or ugly?
Wayyyyyy too much cam for your heavy HD2500 crew cab.

Do you want a peak hp dyno number? Or do you want usable power under the torque curve? Also, a cam that big will need a fuel system, big converter, gears, headers, etc. That doesn't all fit the budget in your OP. Also wont launch very hard in your heavy truck. Think torque instead of hp. Build for torque, and you will gain hp also. But the hp will be "usable".
Old 06-11-2013 | 10:51 AM
  #12  
SlowDude's Avatar
Thread Starter
Launching!
iTrader: (4)
 
Joined: Aug 2012
Posts: 225
Likes: 0
From: Houston
Default

Originally Posted by Mangled03gmc
For 2500 you can have the bottom end done with fresh pistons and rings/bearings ect, come in with a budget built 370. Runs some cleaner through the fuel system, as long as the truck isn't having a misfire issue I would not worry about replacing coils as of yet. Wires, yes prob so. That cam is to much for heavy truck, unless you want to run a converter in the 3200+ range.
Yes. For that money quoted I will be getting the bottom end redone bearings, Lq9 style flat top pistons and rings. Heads (#317) rebuilt and shaved .030-.040 trying to stay around 10.50:1 compression... Due to the weight of the truck and Houston heat, didn't think I wanted to get very crazy with this even though I already have a very good cooling system. Its a BeCool 3 row HD aluminum radiator with two large E-fans and a 180 deg thermostat. Plugs I pulled out look great for 80,000 miles. I replaced em at 100,000 per manual and was thinking the coils and injectors have got to be worn out by now... Don't fix whats not broken?

Originally Posted by AKlowriderZ71
Wayyyyyy too much cam for your heavy HD2500 crew cab.

Do you want a peak hp dyno number? Or do you want usable power under the torque curve? Also, a cam that big will need a fuel system, big converter, gears, headers, etc. That doesn't all fit the budget in your OP. Also wont launch very hard in your heavy truck. Think torque instead of hp. Build for torque, and you will gain hp also. But the hp will be "usable".
Its actually a 1500hd even though I never been able to tell the difference between the two...
I want usable torque. I could care less about peak hp. I want to get this beast rolling and want to be able to pull a trailer from time to time... Circle D 278mm 2800 stall is all I really want to go.... Nothing to radical. OK, So I'm getting the vibe to stay away from this cam. So, what spec cam should I be looking at? I know this varys for person to person but I think I have enough info to let ya know what Im looking for but Im not sure how to get there.... Thanks everybody for your time and tips!
Old 06-11-2013 | 01:23 PM
  #13  
Mangled03gmc's Avatar
Baltimore Whore
iTrader: (95)
 
Joined: Apr 2004
Posts: 16,820
Likes: 2
From: In a van DOWN BY THE RIVER
Default

If your looking for tq in that case, then a lower duration split cam will be the way to go. IMO no do not fix what isn't broken
Old 06-11-2013 | 09:15 PM
  #14  
greasemykey's Avatar
TECH Fanatic
iTrader: (5)
 
Joined: Nov 2005
Posts: 1,152
Likes: 0
From: Portsmouth, VA
Default

didnt the 1500hd come with a 5.3L?
Old 06-12-2013 | 12:23 AM
  #15  
aldrichg9's Avatar
Staging Lane
iTrader: (1)
 
Joined: Aug 2012
Posts: 61
Likes: 0
From: Terre Haute
Default

Originally Posted by greasemykey
didnt the 1500hd come with a 5.3L?

Nope. 6.0
Old 06-12-2013 | 10:37 PM
  #16  
SlowDude's Avatar
Thread Starter
Launching!
iTrader: (4)
 
Joined: Aug 2012
Posts: 225
Likes: 0
From: Houston
Default

The 1500HD is what some called the heavy half. With the 6.0, 4l80e and 3.73 HD rear is def the best truck I have ever owned. Bought new in 2002 and been punished ever since. Im shocked that the compression looks this good after almost 200,000. Cheyy has come a long way since my sb and pontiac days!
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
walledition
GM Drivetrain & Suspension
44
11-13-2015 06:29 PM
kalikid06
Tuning, Diagnostics, Electronics, and Wiring
20
10-13-2015 08:37 AM
MA$TER_E
Tuning, Diagnostics, Electronics, and Wiring
5
09-09-2015 04:14 PM
Boyes50
FUEL SYSTEMS
2
09-08-2015 01:06 PM
bisqikss
GM Engine & Exhaust Performance
15
09-08-2015 04:35 AM




All times are GMT -5. The time now is 11:20 AM.