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.
|
04-16-2018, 11:25 AM
|
#1
|
Name: mfsuper90
Title: 300ft is all I need
Status: Not Here
Join Date: Feb 2013
Location: Southeast ohio
Member`s Gallery
Posts: 769
|
Cutting piston bowls
Getting ready to do a Reenterant delete to an engine I’m playing with.
The piston im working on has an offset bowl with a deep lip. My plan was to cut the lip straight down to the bottom radius of the bowl. Going to chuck it up in a four jaw chuck and center it to the offset bowl then cut the lip off. I’d love to post pictures, but photobucket screwed me and I haven’t taken the time to figure anything else out.
I know bowl geometry is a complicated design, so I’m not looking to totally redesign it. I just want to open the bowl up to keep from burning the lip off the piston when we run advanced timing.
Application is a 1006 perkins running a “Farm stock” class
__________________
’82 300D benz Bosch MW turned up, HX30, W/A Intercooler
MF Super 90 various odds and ends done. Farm stocker
MF 98 3-71 screaming jimmy. Needs N90's. Another farm stock
'14 Ram Anarchy EFI, G56
|
|
|
04-18-2018, 11:04 PM
|
#2
|
Name: mfsuper90
Title: 300ft is all I need
Status: Not Here
Join Date: Feb 2013
Location: Southeast ohio
Member`s Gallery
Posts: 769
|
Well I finished them
Before and after.
Before the bowl ID was 1.9, now it is 2.45”
Went from 45cc bowl to 60cc. Should put compression at 14.5:1. I think that’ll work fine for what we are doing
__________________
’82 300D benz Bosch MW turned up, HX30, W/A Intercooler
MF Super 90 various odds and ends done. Farm stocker
MF 98 3-71 screaming jimmy. Needs N90's. Another farm stock
'14 Ram Anarchy EFI, G56
|
|
|
04-18-2018, 11:14 PM
|
#3
|
Name: fatgraderman
Title: Diesel Enthusiast
Status: Not Here
Join Date: Oct 2013
Location: Innisfail AB
Member`s Gallery
Posts: 170
|
Quote:
Originally Posted by mfsuper90
Well I finished them
Before and after.
Before the bowl ID was 1.9, now it is 2.45”
Went from 45cc bowl to 60cc. Should put compression at 14.5:1. I think that’ll work fine for what we are doing
|
Nice work!
Sent from my iPhone using Tapatalk Pro
|
|
|
04-19-2018, 07:54 AM
|
#4
|
Name: Rich dzl
Title: 12v guru
Status: Not Here
Join Date: Mar 2011
Member`s Gallery
Posts: 741
|
Looks good
|
|
|
04-20-2018, 08:09 AM
|
#5
|
Name: mfsuper90
Title: 300ft is all I need
Status: Not Here
Join Date: Feb 2013
Location: Southeast ohio
Member`s Gallery
Posts: 769
|
I’m open for Criticism. I’m sure there is some way I could improve them
__________________
’82 300D benz Bosch MW turned up, HX30, W/A Intercooler
MF Super 90 various odds and ends done. Farm stocker
MF 98 3-71 screaming jimmy. Needs N90's. Another farm stock
'14 Ram Anarchy EFI, G56
|
|
|
04-20-2018, 06:18 PM
|
#6
|
Name: Rich dzl
Title: 12v guru
Status: Not Here
Join Date: Mar 2011
Member`s Gallery
Posts: 741
|
I wish now I haven't junked 30 sets of stock pistons now lol ..
|
|
|
04-21-2018, 01:32 PM
|
#7
|
Name: mfsuper90
Title: 300ft is all I need
Status: Not Here
Join Date: Feb 2013
Location: Southeast ohio
Member`s Gallery
Posts: 769
|
Interesting side note, just torqued the head down. Specs are 80ft lbs then plus 180 degrees if it’s a medium length bolt (different lengths get different degrees). After running them, I set my torque wrench to 150ft lb, and the bolt I tested didn’t even budge.
I’m not a big guy, I had to have a 3ft cheater pipe to get them torqued. That’s a lot of torque on a 1/2” bolt
__________________
’82 300D benz Bosch MW turned up, HX30, W/A Intercooler
MF Super 90 various odds and ends done. Farm stocker
MF 98 3-71 screaming jimmy. Needs N90's. Another farm stock
'14 Ram Anarchy EFI, G56
|
|
|
04-21-2018, 08:40 PM
|
#8
|
Name: TheBac
Title: UPS guy
Status: Not Here
Join Date: Oct 2009
Location: Mid Michigan
Member`s Gallery
Posts: 2,344
|
Quote:
Originally Posted by mfsuper90
I’m open for Criticism. I’m sure there is some way I could improve them
|
You did good. Thats how shops cut Dmax pistons, for the same reasons you did. What size radius did you put on the edge?
__________________
Tom
"BBT" -- 2003 GMC CC/SB 4x4 12.14@111.15
"KLESHAY" -- 2000 C5 Corvette -- the toy
2017 Buick Regal 2.0T -- the DD
|
|
|
04-21-2018, 11:25 PM
|
#9
|
Name: mfsuper90
Title: 300ft is all I need
Status: Not Here
Join Date: Feb 2013
Location: Southeast ohio
Member`s Gallery
Posts: 769
|
Quote:
Originally Posted by TheBac
You did good. Thats how shops cut Dmax pistons, for the same reasons you did. What size radius did you put on the edge?
|
I gave it the eye ball radius
I’m no machinist by any means, but I’m slowly learning. The grinder I use has no degree marks so cut them by eye with the regular tool I was using. Then I cleaned them up with some rough sandpaper and finished them with some rough scotch brite (red pads?). I couldn’t get my tool to give me the surface finish I wanted, but it did the job. Need to upgrade my tooling
__________________
’82 300D benz Bosch MW turned up, HX30, W/A Intercooler
MF Super 90 various odds and ends done. Farm stocker
MF 98 3-71 screaming jimmy. Needs N90's. Another farm stock
'14 Ram Anarchy EFI, G56
|
|
|
04-22-2018, 07:11 AM
|
#10
|
Name: TheBac
Title: UPS guy
Status: Not Here
Join Date: Oct 2009
Location: Mid Michigan
Member`s Gallery
Posts: 2,344
|
I like it. I believe when Merchant cut mine, his machinist used a .25" radius. Yours look close to that.
I figured it lowered my comp ratio around .5 by doing so, too.
__________________
Tom
"BBT" -- 2003 GMC CC/SB 4x4 12.14@111.15
"KLESHAY" -- 2000 C5 Corvette -- the toy
2017 Buick Regal 2.0T -- the DD
|
|
|
04-22-2018, 07:09 PM
|
#11
|
Name: mfsuper90
Title: 300ft is all I need
Status: Not Here
Join Date: Feb 2013
Location: Southeast ohio
Member`s Gallery
Posts: 769
|
Going from 45cc to 60 dropped mine 3 points roughly
__________________
’82 300D benz Bosch MW turned up, HX30, W/A Intercooler
MF Super 90 various odds and ends done. Farm stocker
MF 98 3-71 screaming jimmy. Needs N90's. Another farm stock
'14 Ram Anarchy EFI, G56
|
|
|
04-22-2018, 07:52 PM
|
#12
|
Name: TheBac
Title: UPS guy
Status: Not Here
Join Date: Oct 2009
Location: Mid Michigan
Member`s Gallery
Posts: 2,344
|
3 points? Yow.
__________________
Tom
"BBT" -- 2003 GMC CC/SB 4x4 12.14@111.15
"KLESHAY" -- 2000 C5 Corvette -- the toy
2017 Buick Regal 2.0T -- the DD
|
|
|
04-23-2018, 06:57 AM
|
#13
|
Name: mfsuper90
Title: 300ft is all I need
Status: Not Here
Join Date: Feb 2013
Location: Southeast ohio
Member`s Gallery
Posts: 769
|
But I was going from 17.5 down to 14.5
__________________
’82 300D benz Bosch MW turned up, HX30, W/A Intercooler
MF Super 90 various odds and ends done. Farm stocker
MF 98 3-71 screaming jimmy. Needs N90's. Another farm stock
'14 Ram Anarchy EFI, G56
|
|
|
04-23-2018, 08:30 PM
|
#14
|
Name: odieub
Title: Too Much Time
Status: Not Here
Join Date: Nov 2007
Location: Leitchfield, KY
Member`s Gallery
Posts: 923
|
Talked before i read.
__________________
95 1500 rc sb 2wd p7100 24v auto, ats 5 star, suncoast kit, dtt billit input, sperico, fun tire eater. In pieces
95 2500 2wd rclb nv5600 500k 5x.012 ddp 887 pump, #11 plate hx35/40-14cm
16 3500 4wd aisin cclb dually flatbed, toy hauler
Last edited by odieub; 04-23-2018 at 08:31 PM.
|
|
|
04-23-2018, 10:58 PM
|
#15
|
Name: Highwayman
Title: bored.
Status: Not Here
Join Date: Oct 2014
Location: Wacko
Member`s Gallery
Posts: 2,087
|
I’m curious to see how the straight walls change things up.
__________________
97 Dodge 2500 RCLB ( scrapped)
1973 F250 crew (soon to receive new power train)
COMPD:
Quote:
Originally Posted by rcfreak24
Lolzzzzzz fakin haters
|
|
|
|
04-24-2018, 05:31 AM
|
#16
|
Name: mfsuper90
Title: 300ft is all I need
Status: Not Here
Join Date: Feb 2013
Location: Southeast ohio
Member`s Gallery
Posts: 769
|
Quote:
Originally Posted by Highwayman
I’m curious to see how the straight walls change things up.
|
Abunch of things are changing at once, so I won’t have a good report of how it changed performance
__________________
’82 300D benz Bosch MW turned up, HX30, W/A Intercooler
MF Super 90 various odds and ends done. Farm stocker
MF 98 3-71 screaming jimmy. Needs N90's. Another farm stock
'14 Ram Anarchy EFI, G56
|
|
|
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 01:15 AM.
|