6.7 Performance Internals - Competition Diesel.Com

emkay · 08-14-2017, 12:33 PM

I am looking for recomendations to fix my 6.7. Engine has a bent rod and some significant scratches in the cylinder (wall where the piston runs). I inted to get it bored and replace the oem parts with some strobger stuff... what would you guys recommend? Specifically looking for pistons and rods.

Engine is actually equiped with single gtx4508r (with bd spool valve, no gate), all deleted, steed speed header, wildcard intake, hamilton springs, bbi injectors (stage 2), 175% cp3, 425 arps and stuff like lift pump etc...

Hope to get some input! THANKS IN ADVANCE FOR THE HELP!!!

unfinished business · 08-14-2017, 09:06 PM

What are your goals/intentions with the truck? Also, what is your budget?

emkay · 08-19-2017, 03:28 PM

Id like to keep it „streetable“... no comp only truck. Budget is „get the reasonable best“... no one offs but serious, proven parts... I initially thought to do mahle monotherms and carillos, but no monotherms available and a lot of discussion carillos not being „the one and only“. Seems piston wise d&j and wiseco are available (what I know) but thats all i know from just reading „here and there“, no real „i tried this“ stuff

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9724VF350 · 08-19-2017, 03:52 PM

I just seen Apex Diesel if offering their own rods for 2K a set. That's a better price than anything else I've seen. I would say if it's going to be a street truck, stick with stock pistons.

QMFB · 08-19-2017, 05:43 PM

Carillo's have been around a long time and have proven themselves. Maybe not the "cheapest" billet rod, but widely available. Monotherm pistons would be WAY overkill for your setup, and end up causing more problems with cylinder wear.
I'd stick with OEM pistons... Or, if you really want a better piston (that won't cause problems) get some Cummins QSB pistons.

Cflanery88 · 08-20-2017, 12:22 AM

Cummins 6.7 QSB piston bowl design is different(like a late 5.9 CR)than the 6.7 ISB( like an early 5.9 CR)

Poulina · 08-20-2017, 01:16 AM

no one would argue that a reentrant style bowl, 03-04 & stock 6.7, would be a better piston choice for a street application looking to make power?

edit: defining "power" as; at or under 1000hp

Cflanery88 · 08-20-2017, 03:18 AM

From what little understanding I have is an open or "non-reentrant" style piston bowl would allow for more timing. I am running QSB pistons in my long rod 6.4l really only due to already having a cylinder head and injectors from my 2006, and buying pistons was cheaper than changing injectors. The stock 6.7 ISB piston bowl would be sufficient for 1000hp.

emkay · 08-27-2017, 12:25 PM

Thanks for all the input/ help!! Anyone with „tried and true“ experience on Wiseco or Arias Pistons? Seems both make 6.7 pistons with an oem style bowl design. As I have BBI injectors already with 6.7 spray pattern I think changing bowl design might not work?

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Shaky93 · 09-03-2017, 06:42 PM

Carillos are good, but I do know personally of a set letting loose at 1250 horse in a 5.9 common rail. X beams from D&J aren't much more expensive though, and have the pressure lubed wrist pin bushings.

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Cflanery88 · 09-03-2017, 10:53 PM

Quote:

Originally Posted by Shaky93

Carillos are good, but I do know personally of a set letting loose at 1250 horse in a 5.9 common rail. X beams from D&J aren't much more expensive though, and have the pressure lubed wrist pin bushings.

Sent from my SM-G900V using Tapatalk

Yeah D&J just dropped the price down to what I paid for Wagler rods 6 months ago.

SledPuller21 · 09-05-2017, 07:39 PM

Quote:

Originally Posted by blackmega3500

Wasn't Apex using R&R? I could be mistaken!

No, we use our rods in all standard length engine builds. Deckplate builds at this time we are still using Carrillos +1" until ours finish testing.

08-14-2017, 12:33 PM	#1
emkay Name: emkay Title: SPEEDFREAK Status: Not Here Join Date: Jun 2010 Location: Germany (EUROPE) Member`s Gallery Posts: 29	6.7 Performance Internals I am looking for recomendations to fix my 6.7. Engine has a bent rod and some significant scratches in the cylinder (wall where the piston runs). I inted to get it bored and replace the oem parts with some strobger stuff... what would you guys recommend? Specifically looking for pistons and rods. Engine is actually equiped with single gtx4508r (with bd spool valve, no gate), all deleted, steed speed header, wildcard intake, hamilton springs, bbi injectors (stage 2), 175% cp3, 425 arps and stuff like lift pump etc... Hope to get some input! THANKS IN ADVANCE FOR THE HELP!!! __________________ ________________________ 2007.5 - 6.7 Cummins, G56, RCLB 2WD (Smarty Custom, all deletes, WCC intake, II 85% CP3, custom stix, ARP425, Hamilton Springs, Steed Speed, GTX4508R, Source 2nd Gen. Kit, AirDog II 165, Valair Triple, Caltracs, lowered, 24x10 KMC Monster)

08-14-2017, 09:06 PM	#2
unfinished business Name: unfinished business Title: Too Much Time Status: Not Here Join Date: Mar 2008 Member`s Gallery Posts: 968	What are your goals/intentions with the truck? Also, what is your budget? __________________ 2018 Megacab 2500 - DD 1971 Chevelle - LBZ

08-19-2017, 03:28 PM	#3
emkay Name: emkay Title: SPEEDFREAK Status: Not Here Join Date: Jun 2010 Location: Germany (EUROPE) Member`s Gallery Posts: 29	Id like to keep it „streetable“... no comp only truck. Budget is „get the reasonable best“... no one offs but serious, proven parts... I initially thought to do mahle monotherms and carillos, but no monotherms available and a lot of discussion carillos not being „the one and only“. Seems piston wise d&j and wiseco are available (what I know) but thats all i know from just reading „here and there“, no real „i tried this“ stuff Sent from my iPhone using Tapatalk __________________ ________________________ 2007.5 - 6.7 Cummins, G56, RCLB 2WD (Smarty Custom, all deletes, WCC intake, II 85% CP3, custom stix, ARP425, Hamilton Springs, Steed Speed, GTX4508R, Source 2nd Gen. Kit, AirDog II 165, Valair Triple, Caltracs, lowered, 24x10 KMC Monster)

08-19-2017, 03:52 PM	#4
9724VF350 Name: 9724VF350 Title: Tractor Guy Status: Not Here Join Date: Mar 2010 Location: Northeast Ohio Member`s Gallery Posts: 2,784	I just seen Apex Diesel if offering their own rods for 2K a set. That's a better price than anything else I've seen. I would say if it's going to be a street truck, stick with stock pistons. __________________ 97 F350 4X4 CC Dually 5spd 24V 913 S300/HT3B Ranch Hand. Playtoy-Oliver 1655. 12V now, 13mm, S475 Wife's ride-03 Excursion 12V swap in the works.

08-19-2017, 05:43 PM	#5
QMFB Name: QMFB Title: Fastest Welder in Texas Status: Not Here Join Date: Apr 2016 Location: Corpus Christi, TX. Member`s Gallery Posts: 1,061	Carillo's have been around a long time and have proven themselves. Maybe not the "cheapest" billet rod, but widely available. Monotherm pistons would be WAY overkill for your setup, and end up causing more problems with cylinder wear. I'd stick with OEM pistons... Or, if you really want a better piston (that won't cause problems) get some Cummins QSB pistons. __________________ 04 CCLB DRW - 6.4 Cummins, HPTuners, 80% S&S, 10mm S&S CP3, AD165, s464 /s475, full billet 48re, Arp's EVERYWHERE, mild head work, lots of time and money... And never done.

08-20-2017, 12:22 AM	#6
Cflanery88 Name: Cflanery88 Title: Too Much Time Status: Not Here Join Date: Feb 2016 Location: Shelby, MI 49455 Member`s Gallery Posts: 536	Cummins 6.7 QSB piston bowl design is different(like a late 5.9 CR)than the 6.7 ISB( like an early 5.9 CR) __________________ 06 Dodge Ram 2500 6.4L, Wagler +.080 rods, Hobbit tuned, Exergy150% injectors,Polished s475/87 1:0 A/R Engineered Turbo Billet Wheel,arp625s,14mm main studs,PPE dual fuelers,Hamilton 188/220,extreme pushrods,Fleece bypass/drains/distribution block,110#springs.

08-20-2017, 01:16 AM	#7
Poulina Name: Poulina Title: Too Much Time Status: Not Here Join Date: Dec 2015 Location: Norcal Member`s Gallery Posts: 795	no one would argue that a reentrant style bowl, 03-04 & stock 6.7, would be a better piston choice for a street application looking to make power? edit: defining "power" as; at or under 1000hp __________________ 2008 QCLB 6.8 48re Suncoast PCS, DDP supermentals, forcedinductions 467/87, Hamilton 188/220, Carrillos, studded mains w/stock girdle Last edited by Poulina; 08-20-2017 at 01:19 AM.

08-20-2017, 03:18 AM	#8
Cflanery88 Name: Cflanery88 Title: Too Much Time Status: Not Here Join Date: Feb 2016 Location: Shelby, MI 49455 Member`s Gallery Posts: 536	From what little understanding I have is an open or "non-reentrant" style piston bowl would allow for more timing. I am running QSB pistons in my long rod 6.4l really only due to already having a cylinder head and injectors from my 2006, and buying pistons was cheaper than changing injectors. The stock 6.7 ISB piston bowl would be sufficient for 1000hp. __________________ 06 Dodge Ram 2500 6.4L, Wagler +.080 rods, Hobbit tuned, Exergy150% injectors,Polished s475/87 1:0 A/R Engineered Turbo Billet Wheel,arp625s,14mm main studs,PPE dual fuelers,Hamilton 188/220,extreme pushrods,Fleece bypass/drains/distribution block,110#springs.

08-27-2017, 12:25 PM	#9
emkay Name: emkay Title: SPEEDFREAK Status: Not Here Join Date: Jun 2010 Location: Germany (EUROPE) Member`s Gallery Posts: 29	Thanks for all the input/ help!! Anyone with „tried and true“ experience on Wiseco or Arias Pistons? Seems both make 6.7 pistons with an oem style bowl design. As I have BBI injectors already with 6.7 spray pattern I think changing bowl design might not work? Sent from my iPhone using Tapatalk __________________ ________________________ 2007.5 - 6.7 Cummins, G56, RCLB 2WD (Smarty Custom, all deletes, WCC intake, II 85% CP3, custom stix, ARP425, Hamilton Springs, Steed Speed, GTX4508R, Source 2nd Gen. Kit, AirDog II 165, Valair Triple, Caltracs, lowered, 24x10 KMC Monster)

09-03-2017, 06:42 PM	#10
Shaky93 Name: Shaky93 Title: Too Much Time Status: Not Here Join Date: Dec 2015 Location: Western IA Member`s Gallery Posts: 321	Carillos are good, but I do know personally of a set letting loose at 1250 horse in a 5.9 common rail. X beams from D&J aren't much more expensive though, and have the pressure lubed wrist pin bushings. Sent from my SM-G900V using Tapatalk Last edited by Shaky93; 09-03-2017 at 06:46 PM.