Duramax Diesels Forum Truck of the Week
  #31  
Old 05-26-2015, 06:23 AM
mike diesel's Avatar
mike diesel mike diesel is offline
I'm alright.

 
Join Date: Sep 2012
Location: SLC, Utah
Posts: 4,005

Default

I'm running 16:1 ovals in mine. No valve reliefs. My truck has never gotten good fuel mileage and so far hasn't seemed to change any with the ovals over the stockers. Dynoed 1032hp the other day. They daily drive just fine.
__________________
'89 s10 daily driver
Reply With Quote
  #32  
Old 05-26-2015, 12:08 PM
Harbin_22's Avatar
Harbin_22 Harbin_22 is offline
Turning it back up!
 
Join Date: Dec 2010
Location: Southern Indiana
Posts: 3,810

Default

I have around 7,000 miles on my 16.5:1 oval casts. I drove it from Louisville KY, to Evan up in Massachusetts. Averaged 19.6-19.7 hand calculated mpg around 75mph most of the way and it was -20 when I left my house and never broke above 0 on the way up. It was a 750 mile nonstop other than fuel trip.
__________________
10' CCSB
Carrillos, Fingers 16.5:1 Cast Pistons, 3388AF Cam, PPE Dual CP3's, Exergy 200% inj, Danvile Billet 72R, HSP tripples/2-SXE369's, Limitless Diesel All Billet Comp Trans with LD TC, DHD lock up, Air Dog, Banks, RDL, CalTracs, QA1, M/A, Isspro, Novakanes/420's, 30x14 cheaters
Tuning from Mark@Danville

1,101HP/1727ftlbs
6.56@111 1/8
10.12@138 1/4
Reply With Quote
  #33  
Old 05-26-2015, 02:46 PM
Verlon at ATP Verlon at ATP is offline
Hotrodder
 
Join Date: Mar 2015
Posts: 165
Default

I have had mine in since early 2013. I have around 55k miles on them. They have been out of the motor twice. Broke crank end of 2013. rebuilt again early 2015 because motor felt funny. Pistons look good as new.
__________________
2005 CCSB Twins, Trans, Injectors. Expensive
2006 CCSB Bigger Twins, Trans, Injectors. More expensive

I like to race

208-685-1000
Reply With Quote
  #34  
Old 05-28-2015, 06:35 PM
malibu795's Avatar
malibu795 malibu795 is offline
misspeelleerr

 
Join Date: Apr 2007
Location: in the buckeye state
Posts: 7,323
Default

All goes well truck will be run by next Friday pending machine shop
__________________
Adam
mispeeling wrods n a thraed nere u
07.5 3500hd RCLB LMM GT4088R, 4.56 gears 225/70/19.5 efi live 478k broke block
99 FL60 8.3 12v 13sp
Quote:
smooth seas never made a skillfull salior
Reply With Quote
  #35  
Old 05-28-2015, 06:42 PM
05smoker's Avatar
05smoker 05smoker is offline
I'm officially done!
 
Join Date: Mar 2007
Location: Lebanon, OH
Posts: 2,378

Default

Quote:
Originally Posted by malibu795 View Post
All goes well truck will be run by next Friday pending machine shop
What do you hope to get by going 18:1?
__________________
2005 2500HD CHEVY CCSB, Blackout VVT, FPE SCIV w/ 1057, 3" lowering shackles, overloads removed, Cooper Zeon LTZs on BMF REPRs. SOLD

Thanks to Fleece, Blackout Performance, Genes Machine Shop, Tim, Bullfrog, Simon, Mark Broviak .......

Remote mount turbo, Electric Water Pump, Cheetah turbo - Member #1
Reply With Quote
  #36  
Old 05-28-2015, 08:08 PM
malibu795's Avatar
malibu795 malibu795 is offline
misspeelleerr

 
Join Date: Apr 2007
Location: in the buckeye state
Posts: 7,323
Default

Quote:
Originally Posted by 05smoker View Post
What do you hope to get by going 18:1?
Sided with 17.5:1. Better part throttle and hopefully better mpg
__________________
Adam
mispeeling wrods n a thraed nere u
07.5 3500hd RCLB LMM GT4088R, 4.56 gears 225/70/19.5 efi live 478k broke block
99 FL60 8.3 12v 13sp
Quote:
smooth seas never made a skillfull salior
Reply With Quote
  #37  
Old 05-28-2015, 08:18 PM
Chevy1925's Avatar
Chevy1925 Chevy1925 is offline
don't know sh!t about IFS

 
Join Date: Oct 2009
Location: Phoenix Az
Posts: 14,224

Default

What are you shooting for on quench?
__________________
Quote:
Originally Posted by JoshH View Post
Mike L is my role model. I want to be like him when I grow up.
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
Tailgate Crew Member #4
Reply With Quote
  #38  
Old 05-28-2015, 08:37 PM
malibu795's Avatar
malibu795 malibu795 is offline
misspeelleerr

 
Join Date: Apr 2007
Location: in the buckeye state
Posts: 7,323
Default

Quote:
Originally Posted by Chevy1925 View Post
What are you shooting for on quench?
Probably quench will be what ever A gasket is thick. Shooting for .025-.030 range.. Valve springs have 222k on them and I current have no way to test seat pressure.. I'm worried about the valves floating as possible hitting pistons on a loaded 5-4 shift..
Less dead air in the engine the better off it is
Love to put a Hamilton camshaft and valve spring along with dhd 3" y bridge and intake in.. But that's another ~2200.00 in parts and transmission is still stock..
__________________
Adam
mispeeling wrods n a thraed nere u
07.5 3500hd RCLB LMM GT4088R, 4.56 gears 225/70/19.5 efi live 478k broke block
99 FL60 8.3 12v 13sp
Quote:
smooth seas never made a skillfull salior

Last edited by malibu795; 05-28-2015 at 08:55 PM.
Reply With Quote
  #39  
Old 05-29-2015, 09:47 PM
Fingers's Avatar
Fingers Fingers is offline
Village Idiot
 
Join Date: Apr 2008
Location: White Oak, PA
Posts: 1,605
Default

I make most anything the customers want compression wise, but I don't recommend anything over 16.5 CR. I'm not worried about the pistons as much as the bottom end of the customer's engine.

Mine is 17.5 and I am looking forward to some day recutting them to 16.5 CR.
__________________
But.....What do I know.

'04.5 EC/LB 4x4.
Howard Rods w/ oiler hole.
Oval Chambers and valve reliefs cut in Mahle Cast Pistons. 17.5:1
SoCal Stage 2 heads, 3388 Cam, Billet Flywheel, and harmonic balancer.
Danville 68mm VVT Turbo
100 over injectors.
PPE Dual CP3s
ProFab Castflow headers and uppipes.
100 PSIA MAP Sensor
Kennedy dual lift pump.

Dynoed 690 HP / 1200 TQ
Reply With Quote
  #40  
Old 06-02-2015, 06:55 PM
schulte schulte is offline
Hotrodder

 
Join Date: Jul 2010
Location: CT
Posts: 449

Default

40-50,000 miles on mine. Dynoed 982hp, decent number of pulls, twins with dual fueler/125% over injectors, plenty of dyno days, etc.

Ran great, went with another set of oval bowls for my next build.
__________________
2004 CCSB LLY
Reply With Quote
  #41  
Old 06-02-2015, 07:01 PM
S Phinney's Avatar
S Phinney S Phinney is offline
Hotrodder
 
Join Date: Aug 2008
Location: Quncy, Fl
Posts: 3,790

Default

Quote:
Originally Posted by malibu795 View Post
Probably quench will be what ever A gasket is thick. Shooting for .025-.030 range.. Valve springs have 222k on them and I current have no way to test seat pressure.. I'm worried about the valves floating as possible hitting pistons on a loaded 5-4 shift..
Less dead air in the engine the better off it is
Love to put a Hamilton camshaft and valve spring along with dhd 3" y bridge and intake in.. But that's another ~2200.00 in parts and transmission is still stock..
Quench could have been adjusted by compression height when they were cut. Most guys just order compression ratios and do not spec a compression height for the pistons to be done for the build.
__________________
03 GMC 4x4 CC/SB Intake, Dual Exhaust, built motor by Me, Cognito Kryptonite Suspension upgrades, Custom Traction Bars by Me, Suncoast Trans, 1055-1 Convertor, Two AirDog II 200's, Billet Sump, Venom Tuning AKA Me, Custom Fabbed Fuel system, Flexlite Fans, Best Time to date 7.14 at 98.21 mph 1211.8HP 1954.5 FT/Lb torque
2013 LML Daily Driver, 5" FloPro Exhaust, Venom Tuning, Ad 165 4G Lift Pump, Upcoming HSP Billet Bridge And Piping, Upcoming CP3 Conversion
Reply With Quote
  #42  
Old 06-02-2015, 07:08 PM
x MadMAX DIESEL's Avatar
x MadMAX DIESEL x MadMAX DIESEL is offline
<<<< No Horsepower

 
Join Date: Dec 2008
Location: Lexington, Ky
Posts: 7,496

Default

Quote:
Originally Posted by S Phinney View Post
Quench could have been adjusted by compression height when they were cut. Most guys just order compression ratios and do not spec a compression height for the pistons to be done for the build.

If you change the height won't that change that ratio


Sent from my iPhone using Tapatalk
__________________
Ben
LBZ Stock Charger
12.26@108.8
7.78@87.7


2.5 puller in the Mecca!!

Manual Mafia

Quote:
Originally Posted by BgBlDodge View Post
Al gore invented driving the turbo.
Reply With Quote
  #43  
Old 06-02-2015, 08:22 PM
Fingers's Avatar
Fingers Fingers is offline
Village Idiot
 
Join Date: Apr 2008
Location: White Oak, PA
Posts: 1,605
Default

Yes it does. But only because it changes the Quench. If you decked the block 0.005" and shave the pistons 0.005" you've not changed a thing. Change from an "A" gasket to a "C" and you lose 1/2-3/4 point in compression and vise-versa.

I spec the pistons by chamber volumes. I then use that volume to ball-park the CR for a typical build. However, it is up to the builder to realize that mucking with the quench will change the CR.

In rough terms, each 0.005" change in the quench is worth about 1/4 point in compression.
__________________
But.....What do I know.

'04.5 EC/LB 4x4.
Howard Rods w/ oiler hole.
Oval Chambers and valve reliefs cut in Mahle Cast Pistons. 17.5:1
SoCal Stage 2 heads, 3388 Cam, Billet Flywheel, and harmonic balancer.
Danville 68mm VVT Turbo
100 over injectors.
PPE Dual CP3s
ProFab Castflow headers and uppipes.
100 PSIA MAP Sensor
Kennedy dual lift pump.

Dynoed 690 HP / 1200 TQ
Reply With Quote
  #44  
Old 06-02-2015, 08:27 PM
malibu795's Avatar
malibu795 malibu795 is offline
misspeelleerr

 
Join Date: Apr 2007
Location: in the buckeye state
Posts: 7,323
Default

Quote:
Originally Posted by S Phinney View Post
Quench could have been adjusted by compression height when they were cut. Most guys just order compression ratios and do not spec a compression height for the pistons to be done for the build.
new ones have same Compression height as the ones I pulled out...
the LBZ I did the finger pistons I got from fingers where ~.015" shorter ended up flush with a virgin deck block... ended up running grade A head gaskets with it..
the LMM pistons where flush on tear down with the deck. Bs came factory on this.. Cs went in back in November on a head gasket job..
IIRC As are ~.035" thick and Bs are ~.040" thick
nothing noticeable was wrong with the deck surface of the LMM on tear down... so far my machine job has turned into a bore, balance, polish crank, and main bore/hone job(with arp main studs) kind a pointless putting TTY main bolts back in when it needed machine work..
I still got my old split LBZ piston I could do a side by side with my LMM ones
__________________
Adam
mispeeling wrods n a thraed nere u
07.5 3500hd RCLB LMM GT4088R, 4.56 gears 225/70/19.5 efi live 478k broke block
99 FL60 8.3 12v 13sp
Quote:
smooth seas never made a skillfull salior
Reply With Quote
  #45  
Old 06-25-2015, 09:52 PM
malibu795's Avatar
malibu795 malibu795 is offline
misspeelleerr

 
Join Date: Apr 2007
Location: in the buckeye state
Posts: 7,323
Default

7,000miles on new build so far. Mpg seams bout same as before.... Plan on getting to Firepunks dyno getting some runs on it.. Truck seams to Down shift more than before.. Engine hazes can only really see it at night.. In the headlights
__________________
Adam
mispeeling wrods n a thraed nere u
07.5 3500hd RCLB LMM GT4088R, 4.56 gears 225/70/19.5 efi live 478k broke block
99 FL60 8.3 12v 13sp
Quote:
smooth seas never made a skillfull salior
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 12:57 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
vB.Sponsors