6.7 base 12v Race Engine - Competition Diesel.Com

RacinDuallie · 08-07-2019, 04:33 PM

Any issues to watch out for when building?

Tips?

Gonna be 13mm p pumped. (Seth)

Discuss.

RacinDuallie · 08-07-2019, 06:36 PM

Freightliner block.

Rich dzl · 08-08-2019, 10:06 AM

Deck plate ? Sleeves ?

WUnderwood · 08-08-2019, 10:58 AM

No, but in for the results. What project is this going in?

Vincejax · 08-08-2019, 11:08 AM

Quote:

Originally Posted by WUnderwood

No, but in for the results. What project is this going in?

Replacing the 5.9 in T-MAN's racetruck. he hurt it on his 9.87@135 pass.

9724VF350 · 08-08-2019, 02:16 PM

Pretty straightforward. Fancy billet or modified gear housing. reat seal retainer, oil cooler, pan, pickup, ect are all different than 12V stuff.

Some people make a big deal over the head gasket. The oil passage for the rocker arms is about half covered when using a 12V gasket on a CR block, they still get more than enough oil and work just fine.

56cummins · 08-08-2019, 04:48 PM

My question is, how terrible would it run with centered 6.7 bowls and factory 12v pattern nozzles?

Yes, I know multiple people sell 12v injectors for centered bowl.

Pudge · 08-08-2019, 07:07 PM

If you're planning on 1300+hp I would suggest sleeving or a deckplate. Have people made more without it? Sure. 4.125 is a commonly used bore when sleeved that is plenty strong, factory 5.9 bore would make for a cheaper setup since you can use factory pistons. Put cam bearings in it. The rest has already been mentioned.

To answer the last question, they dont like much timing. I know of a setup running wide bowl CR pistons in a 12v with standard pattern injectors and it goes downhill power wise at 28*, and fast

Sent from my SM-G930R4 using Tapatalk

RacinDuallie · 08-08-2019, 09:00 PM

Quote:

Originally Posted by Pudge

If you're planning on 1300+hp I would suggest sleeving or a deckplate. Have people made more without it? Sure. 4.125 is a commonly used bore when sleeved that is plenty strong, factory 5.9 bore would make for a cheaper setup since you can use factory pistons. Put cam bearings in it. The rest has already been mentioned.

To answer the last question, they dont like much timing. I know of a setup running wide bowl CR pistons in a 12v with standard pattern injectors and it goes downhill power wise at 28*, and fast

Sent from my SM-G930R4 using Tapatalk

can also use commonly used shelf pistons with mods along with modified spray pattern nozzles.

Pudge · 08-09-2019, 05:01 AM

Quote:

Originally Posted by RacinDuallie

can also use commonly used shelf pistons with mods along with modified spray pattern nozzles.

I'm aware. I was replying to the comment directly above mine, asking how poorly it would run with factory 6.7 equipment, and factory angle 12V injectors. It's not ideal.

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97rada · 08-09-2019, 11:57 AM

I like mine. It’s worked well for me for 2 seasons now

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RacinDuallie · 08-09-2019, 02:53 PM

Quote:

Originally Posted by 97rada

I like mine. It’s worked well for me for 2 seasons now

Sent from my iPhone using Tapatalk

wet or solid?

Can you elaborate more on the build?

RacinDuallie · 08-09-2019, 08:31 PM

Hmmmmm.....

T-MAN · 08-09-2019, 08:47 PM

Quote:

Originally Posted by RacinDuallie

Hmmmmm.....

New ashtray ?

ryanss22 · 08-13-2019, 03:34 PM

Would you say it needed sleaving if filled block?

RacinDuallie · 08-13-2019, 03:57 PM

Quote:

Originally Posted by T-MAN

New ashtray ?

That's your deal not mine?! Lol.

YOUNG GUNS15 · 08-16-2019, 07:51 AM

Use the whole cylinder and not just the bowl. #40*

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97rada · 08-16-2019, 12:28 PM

Quote:

Originally Posted by RacinDuallie

wet or solid?

Can you elaborate more on the build?

Mine is a wet sleeved 6.7 with a 12v head and bowl specific to the injector in 4.125 bore. Oem 6.7 block and 6.7 crank originally

Sent from my iPhone using Tapatalk

T-MAN · 09-01-2019, 02:13 PM

Looking for some feedback 2 tries and no luck sealing the head gasket.
First time one of the head gasket crimps was holding me up off the block about .015 and was leaking coolant, second time i sprayed with hi tack and after she got warm I had coolant and oil seeping/ leaking.

questions I have...

Has anybody been successful using a 6.7 mls fire ring head gasket on a 6.7 block and a 12v head running coolant? If you have how smooth was the surface finish?

If I try a composite 24v head gasket next , has anybody had luck sealing this? my concern is the scalloped water jackets around the cylinder on the block leaking...

Lastly my fire rings are cut into my head only, I left the shop for today so I cant measure but does the composite and mls gasket have the same crushed measurement or do you cut the ring depths different?

after removing the head with 1 hot re torque my fire rings measured .0925-,093 crushed with the current mls.

could use some advice from someone who fought this already…. Thanks guys

*Big Blue24* · 09-01-2019, 10:41 PM

MLS fire ringed gaskets require deeper fire ring grooves, usually 046" total depth for a radius groove vs 036" total depth for a radius groove composite standard thickness 12v or 24v gasket.

08-07-2019, 04:33 PM	#1
RacinDuallie Name: RacinDuallie Title: Black Sheep Racing Status: Not Here Join Date: Apr 2006 Location: Supporting Northeast Diesel Racing Member`s Gallery Posts: 17,369	6.7 base 12v Race Engine Any issues to watch out for when building? Tips? Gonna be 13mm p pumped. (Seth) Discuss. __________________

08-08-2019, 02:16 PM	#6
9724VF350 Name: 9724VF350 Title: Tractor Guy Status: Not Here Join Date: Mar 2010 Location: Northeast Ohio Member`s Gallery Posts: 2,784	Pretty straightforward. Fancy billet or modified gear housing. reat seal retainer, oil cooler, pan, pickup, ect are all different than 12V stuff. Some people make a big deal over the head gasket. The oil passage for the rocker arms is about half covered when using a 12V gasket on a CR block, they still get more than enough oil and work just fine. __________________ 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.

08-08-2019, 04:48 PM	#7
56cummins Name: 56cummins Title: Too Much Time Status: Not Here Join Date: Mar 2014 Member`s Gallery Posts: 736	My question is, how terrible would it run with centered 6.7 bowls and factory 12v pattern nozzles? Yes, I know multiple people sell 12v injectors for centered bowl. __________________ 95 cummins

08-08-2019, 07:07 PM	#8
Pudge Name: Pudge Title: Too Much Time Status: Not Here Join Date: Aug 2007 Location: Va. Member`s Gallery Posts: 421	If you're planning on 1300+hp I would suggest sleeving or a deckplate. Have people made more without it? Sure. 4.125 is a commonly used bore when sleeved that is plenty strong, factory 5.9 bore would make for a cheaper setup since you can use factory pistons. Put cam bearings in it. The rest has already been mentioned. To answer the last question, they dont like much timing. I know of a setup running wide bowl CR pistons in a 12v with standard pattern injectors and it goes downhill power wise at 28*, and fast Sent from my SM-G930R4 using Tapatalk __________________ Wishing for more time and money.

08-09-2019, 11:57 AM	#11
97rada Name: 97rada Title: Too Much Time Status: Not Here Join Date: Feb 2008 Member`s Gallery Posts: 5,410	I like mine. It’s worked well for me for 2 seasons now Sent from my iPhone using Tapatalk __________________ Austin tow truck- 14-3500 with tuning toy truck -94 rclb auto- 5.2x with a lot left. Shooting for 4s Any intelligent fool can make things bigger and more complex...it takes a touch of genius- and alot of courage to move in the opposite direction.

08-08-2019, 10:06 AM	#3
Rich dzl Name: Rich dzl Title: 12v guru Status: Not Here Join Date: Mar 2011 Member`s Gallery Posts: 741	Deck plate ? Sleeves ?

08-08-2019, 10:58 AM	#4
WUnderwood Name: WUnderwood Title: CompD Minion Status: Not Here Join Date: Aug 2006 Location: Texas Member`s Gallery Posts: 8,418	No, but in for the results. What project is this going in? __________________ 2011 Ford F-150 Lariat 4X4 RIP BFD99, jponder, and Forrest Nearing

08-13-2019, 03:34 PM	#15
ryanss22 Name: ryanss22 Title: Too Much Time Status: Not Here Join Date: Jul 2012 Location: small town central ny Member`s Gallery Posts: 736	Would you say it needed sleaving if filled block? __________________ 96 fummins 12V puller, few other goodies BUILT NOT BOUGHT!!!!to

08-16-2019, 07:51 AM	#17
YOUNG GUNS15 Name: YOUNG GUNS15 Title: Im AWESOME!!!! Status: Not Here Join Date: Sep 2009 Location: Utah Member`s Gallery Posts: 7,346	Use the whole cylinder and not just the bowl. #40* Sent from my iPhone using Tapatalk __________________ Spence -1994 4x4 12 valve 13mm, single 475 748/1292 Fuel 872/1470 N2O -2005 4x4 12 valve CCSB 3rd gen '12-rail' 280hp

09-01-2019, 02:13 PM	#19
T-MAN Name: T-MAN Title: misunderstood Status: Not Here Join Date: Sep 2008 Member`s Gallery Posts: 352	Looking for some feedback 2 tries and no luck sealing the head gasket. First time one of the head gasket crimps was holding me up off the block about .015 and was leaking coolant, second time i sprayed with hi tack and after she got warm I had coolant and oil seeping/ leaking. questions I have... Has anybody been successful using a 6.7 mls fire ring head gasket on a 6.7 block and a 12v head running coolant? If you have how smooth was the surface finish? If I try a composite 24v head gasket next , has anybody had luck sealing this? my concern is the scalloped water jackets around the cylinder on the block leaking... Lastly my fire rings are cut into my head only, I left the shop for today so I cant measure but does the composite and mls gasket have the same crushed measurement or do you cut the ring depths different? after removing the head with 1 hot re torque my fire rings measured .0925-,093 crushed with the current mls. could use some advice from someone who fought this already…. Thanks guys __________________ 2001.5 ppump allison 11.399@ 117.90 6850# 1997 rcsb 12v 6.7 9.38 @ 146.54

09-01-2019, 10:41 PM	#20
Big Blue24 Name: Big Blue24 Title: Comp Diesel Sponsor Status: Not Here Join Date: Jan 2008 Location: Cedar City, UT Member`s Gallery Posts: 6,310	MLS fire ringed gaskets require deeper fire ring grooves, usually 046" total depth for a radius groove vs 036" total depth for a radius groove composite standard thickness 12v or 24v gasket. __________________ 95' 2wd Junker Drag Truck 1502 HP Fuel-Only 12mm P7100 Pump SXE 472 over GTX55 116mm OEM 12v Block