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.
|
10-01-2018, 01:42 AM
|
#1
|
Name: cityredneck
Title: Diesel Mechanic
Status: Not Here
Join Date: Sep 2009
Location: Blairsville, PA
Member`s Gallery
Posts: 393
|
How much is too much PTW?
So there was a mishap at the machine shop with a block for a drag truck build. It is a 12 valve and will stay around 1000-1200hp. +.020 mahle motorsport cast pistons .150" fly cuts, 13mm pump w 5x.025s. Single 80mm charger.. wet motor. Will see the dragstrip and the occasional 10 mile drive to a car show
PTW was to be set at .010"... in the end it wound up at .0135". My question is, go ahead and run it, or will we run into issues. w To much rocking, blowby even with rings set correctly? can this prematurely wear the rings?
Time is a factor here. Cam tunnel is already done. Would rather not start over or sleeve unless absolutely necessary.
Thoughts?
Sent from my SM-G955U using Tapatalk
__________________
05 Purple CCSB 5.9
Fastest to date 10.11 @ 137
HP Tuning by Gordon @ Innovative
Exergy 150%, Industrial dual CP3's, Garrett GT4509R. Manual VB, Some nitrous and other goodies
|
|
|
10-01-2018, 07:48 AM
|
#2
|
Name: YOUNG GUNS15
Title: Im AWESOME!!!!
Status: Not Here
Join Date: Sep 2009
Location: Utah
Member`s Gallery
Posts: 7,346
|
That’s a lot, I think I’m running .005 PTW stock is around .003” my Motor had nitrous in mind when I built it.
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
|
|
|
10-01-2018, 09:29 AM
|
#3
|
Name: 24vppump59
Title: Diesel Enthusiast
Status: Not Here
Join Date: Apr 2017
Member`s Gallery
Posts: 190
|
I’m almost in the same exact spot, I ordered D&J pistons for a STD bore 6.7 and they were .013 PTW right out of the box. Drew claims .012-.014 is what he likes to see and has ran them as loose as .015-.016 without seeing any issues. Not sure if that’s just for his pistons or if that’s all of them in general. I’m sure they all grow differently. So if it makes you feel any better, after my torque plate hone is done mine will be ran about .0145. Lol
|
|
|
10-01-2018, 09:56 AM
|
#4
|
Name: Cflanery88
Title: Too Much Time
Status: Not Here
Join Date: Feb 2016
Location: Shelby, MI 49455
Member`s Gallery
Posts: 536
|
Quote:
Originally Posted by 24vppump59
I’m almost in the same exact spot, I ordered D&J pistons for a STD bore 6.7 and they were .013 PTW right out of the box. Drew claims .012-.014 is what he likes to see and has ran them as loose as .015-.016 without seeing any issues. Not sure if that’s just for his pistons or if that’s all of them in general. I’m sure they all grow differently. So if it makes you feel any better, after my torque plate hone is done mine will be ran about .0145. Lol
|
“Loose” just how you like your woman
__________________
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.
|
|
|
10-01-2018, 10:10 AM
|
#5
|
Name: 24vppump59
Title: Diesel Enthusiast
Status: Not Here
Join Date: Apr 2017
Member`s Gallery
Posts: 190
|
Quote:
Originally Posted by Cflanery88
“Loose” just how you like your woman
|
I like my women how I like my PTW clearance.
|
|
|
10-01-2018, 11:02 AM
|
#6
|
Name: Snedge
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Sep 2006
Location: Western Pa.
Member`s Gallery
Posts: 18,859
|
Quote:
Originally Posted by Cflanery88
“Loose” just how you like your woman
|
Ewww
Sean,
.015" is relativity normal in the performance world, but break in becomes an important issue. An engine dyno would be ideal.
FWIW, I wouldn't expect a "street" driven engine to run that kind of PTW. Not for very long anyway.
|
|
|
10-01-2018, 11:13 AM
|
#7
|
Name: Cflanery88
Title: Too Much Time
Status: Not Here
Join Date: Feb 2016
Location: Shelby, MI 49455
Member`s Gallery
Posts: 536
|
Quote:
Originally Posted by 24vppump59
I like my women how I like my PTW clearance.
|
Lmao. I wish there was a “Like” button.
__________________
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.
|
|
|
10-01-2018, 01:57 PM
|
#8
|
Name: Big Blue24
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Jan 2008
Location: Cedar City, UT
Member`s Gallery
Posts: 6,310
|
0.0135" sounds like a solid block forged piston type engine setup. We just threw an engine together for the Junker with Mahle Cast Performance Pistons on a standard bore and ended up around 0.011" piston to wall on #5 and #6 and closer to 0.01025" for #1 thru #4 bores. I was surprised how long it took for the rings to seat in and slow down the blow by, like several dyno pulls on a hot engine after 2 complete quarter mile passes on the fresh setup.
If you're going to run it really hot all the time, it'll probably be fine but it's bigger than we've ever experimented with on a wet block with cast pistons.
__________________
95' 2wd Junker Drag Truck
1502 HP Fuel-Only 12mm P7100 Pump
SXE 472 over GTX55 116mm
OEM 12v Block
|
|
|
10-01-2018, 03:43 PM
|
#9
|
Name: JWhite
Title: Trained monkey
Status: Not Here
Join Date: Aug 2009
Location: F Burg Ohio
Member`s Gallery
Posts: 1,817
|
I agree, sounds pretty loose for a cast piston setup
__________________
GMC with a LiLLY
|
|
|
10-01-2018, 05:48 PM
|
#10
|
Name: BluegrassDiesel
Title: UK2K!
Status: Not Here
Join Date: Apr 2007
Location: KENTUCKY
Member`s Gallery
Posts: 4,136
|
Ehhhh. Id run it. Standard rings or gapless?
__________________
Josh Land
Bluegrass Diesel Performance
Lancaster, Ky
SHOP ONLINE @ http://WWW.SHOPBLUEGRASS.COM
97 DodgePPL Limited Pro Stock "The Crippler"
09 3500 GMC CCDually
05 Silverado SS
|
|
|
10-01-2018, 08:44 PM
|
#11
|
Name: cityredneck
Title: Diesel Mechanic
Status: Not Here
Join Date: Sep 2009
Location: Blairsville, PA
Member`s Gallery
Posts: 393
|
I decided to just bore it to .040 over and start fresh. Pistons will be here tomorrow and then we can finish hone and reassemble tomorrow night, how fun. I dont feel comfortable with it for this guys application. 2nd ring was total seal but just going to use standard ring since it's going to be getting bored again. If it were a dedicated puller or higher hp drag ONLY I would probably just run it. But he will take it on the street at times. I dont feel like worrying about the walls being beat up a year from now and being in the same predicament
Sent from my SM-G955U using Tapatalk
__________________
05 Purple CCSB 5.9
Fastest to date 10.11 @ 137
HP Tuning by Gordon @ Innovative
Exergy 150%, Industrial dual CP3's, Garrett GT4509R. Manual VB, Some nitrous and other goodies
|
|
|
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 07:19 AM.
|