| Advertisement |
|
|
|
|
|
|
|
If this is your first visit, be sure to check out the FAQ by clicking the link above.
You may have to register before you can post: click the register link above to proceed.
To start viewing messages, select the forum that you want to visit from the selection below.
|
12-02-2014, 09:35 PM
|
#301
|
Name: 12vCumminsFTW
Title: Too Much Time
Status: Not Here
Join Date: Dec 2010
Location: Willcox, AZ
Member`s Gallery
Posts: 1,377
|
Quote:
Originally Posted by YOUNG GUNS15
You'll bust a nut. 1498$ out the door, and NO they did not use chinesium.
Certified Injection Service out of Salt Lake City built it.
|
Hmmm I could afford that lol. Anything else done to it besides 13mm p&b? I'll be interested to hear how it runs.
__________________
-Aaron H.
97 12v 4x4
|
|
|
|
|
12-03-2014, 01:14 AM
|
#302
|
Name: Chrisd91
Title: Too Much Time
Status: Not Here
Join Date: Nov 2010
Location: Washington state
Member`s Gallery
Posts: 1,808
|
Quote:
Originally Posted by DieselheaD
Who did your pump? It sounds strange that you only have 100cc of adjustment? Also are you will to sell the hx82?
|
I think the DVs are the limiting factor for upward adjustment
__________________
01 2500 RCLB 4x4 p24v in transmission purgatory/perennial neglect
95ish 2500 2wd shorty p.o.s.
'12 3500 SRW CCLB 4x4 golfball
|
|
|
|
|
12-03-2014, 01:16 AM
|
#303
|
Name: YOUNG GUNS15
Title: Im AWESOME!!!!
Status: Not Here
Join Date: Sep 2009
Location: Utah
Member`s Gallery
Posts: 7,346
|
Quote:
Originally Posted by 12vCumminsFTW
Hmmm I could afford that lol. Anything else done to it besides 13mm p&b? I'll be interested to hear how it runs.
|
Just the 13mm and the cam out of my 215. Of course 5k springs, rack plug etc
__________________
Spence
-1994 4x4 12 valve 13mm, single 475 748/1292 Fuel 872/1470 N2O
-2005 4x4 12 valve CCSB 3rd gen '12-rail' 280hp
|
|
|
|
|
12-09-2014, 01:29 AM
|
#304
|
Name: YOUNG GUNS15
Title: Im AWESOME!!!!
Status: Not Here
Join Date: Sep 2009
Location: Utah
Member`s Gallery
Posts: 7,346
|
Installed factory bypass block (usually used for heaters on buses)
ImageUploadedByTapatalk1418109373.865002.jpg
Painted
ImageUploadedByTapatalk1418109521.050527.jpg
And that's about as far as I got. I ran into some issues with the valve reliefs, Intake valve won't sit into the pocket, you can see in this picture the stem of the exaugst sitting lower than the intake.
ImageUploadedByTapatalk1418109602.113476.jpg
Put some assembly lube on the valves and compressed the springs so I could feel what the valve was doing, exaghst valve sinks in while the intake just barely hits the edge of the relief.
ImageUploadedByTapatalk1418109690.806912.jpg
Another picture showing the same thing, just printed on the head with no head gasket. As you can see, exaugst fits into the pocket well, intake hits just barely.
ImageUploadedByTapatalk1418109939.777056.jpg
As of now I have the pistons all removed to be fixed. Frustrating is an understatement.
In other news I CC'd the bowls and reliefs and they came out at 50.5cc for whoever is wondering. I used a syringe and filled the bowl and relief with water and recorded how many CC's it took. Pretty simple stuff.
__________________
Spence
-1994 4x4 12 valve 13mm, single 475 748/1292 Fuel 872/1470 N2O
-2005 4x4 12 valve CCSB 3rd gen '12-rail' 280hp
|
|
|
|
|
12-09-2014, 01:33 AM
|
#305
|
Name: YOUNG GUNS15
Title: Im AWESOME!!!!
Status: Not Here
Join Date: Sep 2009
Location: Utah
Member`s Gallery
Posts: 7,346
|
I also want to put this up for discussion, my piston protrusion is measured at .027, I'm being told that's about .010 too much. I've found where cummins spec is .024-.028, what do you guys think? I really don't want to cut the Pistons MORE and loose even more compression.
__________________
Spence
-1994 4x4 12 valve 13mm, single 475 748/1292 Fuel 872/1470 N2O
-2005 4x4 12 valve CCSB 3rd gen '12-rail' 280hp
|
|
|
|
|
12-09-2014, 07:35 AM
|
#306
|
Name: Ghostman
Title: 24v crazy
Status: Not Here
Join Date: Aug 2012
Location: Victoria, tx
Member`s Gallery
Posts: 2,819
|
What's the piston to head spec from cummins? I would say that would tell you if the Pistons need to come down some. I believe a stock gasket crushes somewhere around .050"? Can't remember exactly.
Sent from my iPhone using Tapatalk
__________________
2002 4wd towing truck
2002 2wd grocery getter
2001 4wd 12v - retired
2006 QCSB 4wd - EFI Live
Quote:
Originally Posted by Joesixpack
VE vs VP....isn't that like watching retard's fight?  |
|
|
|
|
|
12-09-2014, 08:44 AM
|
#307
|
Name: Smokem
Title: Turbler
Status: Not Here
Join Date: May 2006
Location: Iowa
Member`s Gallery
Posts: 5,565
|
If it is standard bore it would currently be right at 16:1 with the information listed.
|
|
|
|
|
12-09-2014, 09:02 AM
|
#308
|
Name: YOUNG GUNS15
Title: Im AWESOME!!!!
Status: Not Here
Join Date: Sep 2009
Location: Utah
Member`s Gallery
Posts: 7,346
|
Quote:
Originally Posted by Smokem
If it is standard bore it would currently be right at 16:1 with the information listed.
|
Cool, I was playing with a calculator online and couldn't get my compression numbers right, I had to assume an 8cc (I think) combustion chamber to get 16:1 flat. Gasket is .065, I think the motor will be fine as far as protrusion. Lots of second guessing since finding out the reliefs weren't going to work quite right.
So if we assume the gasket crushes out to .050 the. Subtract .027 to get piston to head clearance? Correct? That would leave .023 thou. Does that sound about right? I am still searching for a piston to head spec.
__________________
Spence
-1994 4x4 12 valve 13mm, single 475 748/1292 Fuel 872/1470 N2O
-2005 4x4 12 valve CCSB 3rd gen '12-rail' 280hp
|
|
|
|
|
12-09-2014, 09:13 AM
|
#309
|
Name: ahale2772
Title: Too Much Time
Status: Not Here
Join Date: Oct 2011
Member`s Gallery
Posts: 2,442
|
.025 is not far off of what you should be
__________________
94 SCLB dually 11.3@122
|
|
|
|
|
12-09-2014, 09:33 AM
|
#310
|
Name: Smokem
Title: Turbler
Status: Not Here
Join Date: May 2006
Location: Iowa
Member`s Gallery
Posts: 5,565
|
I tend to err on the side of caution and go low side of the compression scale, this gives room for piston protrusion variance. I would estimate your piston to head ~ 0.028", if you plan to turn it much RPM I would get that value closer to 0.040", remember decking the piston will slightly decrease bowl volume.
|
|
|
|
|
12-09-2014, 01:17 PM
|
#311
|
Name: YOUNG GUNS15
Title: Im AWESOME!!!!
Status: Not Here
Join Date: Sep 2009
Location: Utah
Member`s Gallery
Posts: 7,346
|
Quote:
Originally Posted by Smokem
I tend to err on the side of caution and go low side of the compression scale, this gives room for piston protrusion variance. I would estimate your piston to head ~ 0.028", if you plan to turn it much RPM I would get that value closer to 0.040", remember decking the piston will slightly decrease bowl volume.
|
What kind of rpm would justify cutting them down? Motor may see 5k on occasion, I'll be putting a set of compounds on that will keep me under 4500rpm in the future.
__________________
Spence
-1994 4x4 12 valve 13mm, single 475 748/1292 Fuel 872/1470 N2O
-2005 4x4 12 valve CCSB 3rd gen '12-rail' 280hp
|
|
|
|
|
12-09-2014, 08:55 PM
|
#312
|
Name: TheSilverBullet
Title: All the correction factor
Status: Not Here
Join Date: Jan 2012
Location: Franklin,IA
Member`s Gallery
Posts: 1,598
|
Watching ^^^ my motor build is close to starting. So looks like everyone goes with .050 for stock gasket? Many threads said that but no evidence.
__________________
99 3500 black Laramie~Infinitive Performance Farrel Diesel Service Goerend Transmissions
98 12 valve with all the goodies from 2008
90 w250 "brownie" straight 6 standard transmission
Quote:
Originally Posted by dvst8r
Dying is always a way bigger concern than egt's...
|
|
|
|
|
|
12-10-2014, 07:52 AM
|
#313
|
Name: straight 6 roar
Title: Too Much Time
Status: Not Here
Join Date: Nov 2010
Location: Oahu, Hawaii
Member`s Gallery
Posts: 1,031
|
.010 over gasket would be the easy fix but you probably don't want to take that big of a hit on compression.
__________________
2006 QCSB 2500 4x4 67/83/.90, +60% overs, TRE trans
1998 QCSB 2500 12 valve 4x4 Sold and missed
|
|
|
|
|
12-13-2014, 02:14 PM
|
#314
|
Name: murphy41
Title: Too Much Time
Status: Not Here
Join Date: Jan 2009
Location: Utah
Member`s Gallery
Posts: 1,624
|
Quote:
Originally Posted by Smokem
I tend to err on the side of caution and go low side of the compression scale, this gives room for piston protrusion variance. I would estimate your piston to head ~ 0.028", if you plan to turn it much RPM I would get that value closer to 0.040", remember decking the piston will slightly decrease bowl volume.
|
Hense the reason I suggested to mill the top of the piston .005-.010 to get the piston to valve to about that .038 range. But will take a loss on bowl volume and compression. Which is why I went with a custom ground cam with a little wider LSA to help compensate the clearance without taking a hit on compression.
__________________
Brandon
1997 2WD
Engineered Diesel
Manning Motorsports
Outlaw Diesel Performance (Utah)
AT Performance Diesel
|
|
|
|
|
12-20-2014, 11:20 AM
|
#315
|
Name: YOUNG GUNS15
Title: Im AWESOME!!!!
Status: Not Here
Join Date: Sep 2009
Location: Utah
Member`s Gallery
Posts: 7,346
|
finally got on a computer and realized my pics are all tiny.... lol
Pistons have been modified, and hopefully they fit this time!!!! really eager to get this truck on the road. bough some .140 3/8 push rods from Taylor (TMONEY) last week, dang good deal if you ask me! Really the only parts I am lacking now that more of wants than need's are a billet timing gear cover, billet tappet cover, and an adjustable pump gear. Those will have to come later though.
__________________
Spence
-1994 4x4 12 valve 13mm, single 475 748/1292 Fuel 872/1470 N2O
-2005 4x4 12 valve CCSB 3rd gen '12-rail' 280hp
|
|
|
|
|
12-20-2014, 01:31 PM
|
#316
|
Name: YOUNG GUNS15
Title: Im AWESOME!!!!
Status: Not Here
Join Date: Sep 2009
Location: Utah
Member`s Gallery
Posts: 7,346
|
__________________
Spence
-1994 4x4 12 valve 13mm, single 475 748/1292 Fuel 872/1470 N2O
-2005 4x4 12 valve CCSB 3rd gen '12-rail' 280hp
|
|
|
|
|
12-20-2014, 04:06 PM
|
#317
|
Name: 97rada
Title: Too Much Time
Status: Not Here
Join Date: Feb 2008
Member`s Gallery
Posts: 5,410
|
Different pistons?
__________________
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.
|
|
|
|
|
12-20-2014, 06:23 PM
|
#318
|
Name: YOUNG GUNS15
Title: Im AWESOME!!!!
Status: Not Here
Join Date: Sep 2009
Location: Utah
Member`s Gallery
Posts: 7,346
|
Same pistons, just enlarged the pockets and cut that thin piece of aluminum off closest to the edge of the piston
__________________
Spence
-1994 4x4 12 valve 13mm, single 475 748/1292 Fuel 872/1470 N2O
-2005 4x4 12 valve CCSB 3rd gen '12-rail' 280hp
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -5. The time now is 10:19 AM.
|
