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.
|
Drag Racing Where ALL Racers are Welcome- From ET Bracket, all the way to ProStreet and Top Diesel! |
02-08-2010, 07:52 PM
|
#1
|
Name: John Robinson
Title: Too Much Time
Status: Not Here
Join Date: Dec 2006
Location: Weatherford, Tx.
Member`s Gallery
Posts: 2,384
|
Mahle Monotherms,2 years later.
As many of yall know we have been running these pistons for 2 years now. There was alot of unknowns when we first put them in. The extra weight of an all steel piston spinning at 5800 rpm was a little scary at first but 2 years later i can safley say that it isnt a problem. The set i have is 380 grams heavier than a stock piston. The next generation monotherms are around 100 grams lighter. After the first season on them we tore it down & measured for rod distortion & found none!!We put it all back together rings..bearings & all & ran them all last year. We tore it down for this season & all was still good. I am changing the rings this time but everything else is going right back in there. Keep in mind that year before last we had a n2o backfire while spooling up & midway down the track the cylinder wall blew out. We re-used that piston as well. I dont care what anybody says....Nitrous is HOT!! We saw at least 2200 degrees on each & every pass & they are still flawless. This will be year 3 & I am impressed. No they are not cheap...Good stuff never is, you get what you pay for. My Mahle pistons were worth the investment in every way. They let you get by with murder as far as your tuneup goes. The next generation pistons will be a little higher compression & are aimed at the common rail market but should do just fine for the older 24 valves. They can be ran in a 12 v with some injector fiddleing but i dont know what exactley. The pistons i have are .026 below a stock deck height. The new ones will be a little higher. Here are some pics after 2 years of pure hell. There are some shiny spots between the rings on some but its cosmetic. The micrometer says no metal is missing
__________________
"Ask any American Indian what will happen to this country if we dont control immigration."
|
|
|
02-08-2010, 08:07 PM
|
#2
|
Name: JasonCzerak
Title: Too Much Time
Status: Not Here
Join Date: Aug 2006
Location: Bella Vista, AR
Member`s Gallery
Posts: 14,822
|
Is this kind of piston ok for a daily driver?
__________________
2014 Mercedes Benz E63s - 620awhp
2006 Corvette - 1000whp-ish
|
|
|
02-08-2010, 08:09 PM
|
#3
|
Name: SKYNYRD
Title: "Drunkard"
Status: Not Here
Join Date: May 2007
Location: Harpers Ferry, WV
Member`s Gallery
Posts: 5,665
|
john what rods are those??
__________________
Leonard
79 VW rabbit diesel (ALH & 4motion )
04.5 rclb 4x4
01 & 03 VW Golf TDI
05 rcsb 2wd (in progress )
ROSKOE115: "It's ain't avatar material but I'd hit it!"
|
|
|
02-08-2010, 08:13 PM
|
#4
|
Name: Begle1
Title: Too Much Time
Status: Not Here
Join Date: Nov 2007
Location: Kihei, Maui
Member`s Gallery
Posts: 4,134
|
I think that you're proving the value of these things. If they can make them lighter than stock while maintaining the strength,,, it's an exciting proposition at least.
How many sets are out there? Last I heard they weren't currently making them. If somebody called up Mahle with several thousand dollars, could they get the pistons off the shelf or be put on a short list?
__________________
1990 D-250 Regular Cab: Automatic transmission, turkey air horn, wires.
|
|
|
02-08-2010, 08:27 PM
|
#5
|
Name: John Robinson
Title: Too Much Time
Status: Not Here
Join Date: Dec 2006
Location: Weatherford, Tx.
Member`s Gallery
Posts: 2,384
|
Quote:
Originally Posted by JasonCzerak
Is this kind of piston ok for a daily driver?
|
I havent done it but i cant see why not?
Quote:
Originally Posted by SKYNYRD
john what rods are those??
|
Regular old brazilians.
Quote:
Originally Posted by Begle1
I think that you're proving the value of these things. If they can make them lighter than stock while maintaining the strength,,, it's an exciting proposition at least.
Ive sure asked about that several times. It`s got something to do with the tooling it requires to make them. As i understand it they would have to start all over & build new moulds. The new design will be around 220 heavier but i have yet to see the weight be a problem of any kind. I will take reliability any day.
How many sets are out there? Last I heard they weren't currently making them. If somebody called up Mahle with several thousand dollars, could they get the pistons off the shelf or be put on a short list?
|
The sets like i am running are all gone. I believe there were 4 or 5 sets made of the first batch. They are supposed to be making many more of the new generation pistons. They have been very pleased with what we have shown them with our set. The response has been very good for them. The new ones should be ready pretty soon. Keep in touch & i will get you some more info.
__________________
"Ask any American Indian what will happen to this country if we dont control immigration."
|
|
|
02-08-2010, 08:32 PM
|
#6
|
Name: Joesixpack
Title: Pull'n it.
Status: Not Here
Join Date: Apr 2008
Member`s Gallery
Posts: 4,118
|
Couldn't agree more, love my monotherms and they are running in a CR engine. Its not my daily driver, but as far as I'm concerned I don't see why not.
I put them in my last build after quizzing John up on them.
And damn! 5800 rpm.....balls of steel I say.
__________________
Basically stock if I would have built it at the factory.....
|
|
|
02-08-2010, 08:33 PM
|
#7
|
Name: SKYNYRD
Title: "Drunkard"
Status: Not Here
Join Date: May 2007
Location: Harpers Ferry, WV
Member`s Gallery
Posts: 5,665
|
if they made a set for a 6.7 i might run them in my new build.
__________________
Leonard
79 VW rabbit diesel (ALH & 4motion )
04.5 rclb 4x4
01 & 03 VW Golf TDI
05 rcsb 2wd (in progress )
ROSKOE115: "It's ain't avatar material but I'd hit it!"
|
|
|
02-08-2010, 08:34 PM
|
#8
|
Name: John Robinson
Title: Too Much Time
Status: Not Here
Join Date: Dec 2006
Location: Weatherford, Tx.
Member`s Gallery
Posts: 2,384
|
Quote:
Originally Posted by Joesixpack
Couldn't agree more, love my monotherms and they are running in a CR engine. Its not my daily driver, but as far as I'm concerned I don't see why not.
I put them in my last build after quizzing John up on them.
And damn! 5800 rpm.....balls of steel I say.
|
Did you actually cc them & figure out the true compression ratio?
__________________
"Ask any American Indian what will happen to this country if we dont control immigration."
|
|
|
02-08-2010, 08:36 PM
|
#9
|
Name: John Robinson
Title: Too Much Time
Status: Not Here
Join Date: Dec 2006
Location: Weatherford, Tx.
Member`s Gallery
Posts: 2,384
|
Quote:
Originally Posted by SKYNYRD
if they made a set for a 6.7 i might run them in my new build.
|
Yea no kidding! There is prolly a market there but not enough to justify the cost of production.....Yet
__________________
"Ask any American Indian what will happen to this country if we dont control immigration."
|
|
|
02-08-2010, 08:40 PM
|
#10
|
Name: paint94979
Title: Too Much Time
Status: Not Here
Join Date: Jun 2007
Member`s Gallery
Posts: 317
|
may i ask what the ballpark price was for them?
|
|
|
02-08-2010, 08:50 PM
|
#11
|
Name: Joesixpack
Title: Pull'n it.
Status: Not Here
Join Date: Apr 2008
Member`s Gallery
Posts: 4,118
|
Quote:
Originally Posted by John Robinson
Did you actually cc them & figure out the true compression ratio?
|
Yeah, after decking the block .010 and using a thicker MLS with the .044 crush thickness, it worked out right around the 15.1:1. Which is were I wanted to be for that 1k+.
Balanced it to 0grams and it is amazing how smooth it runs at 4k (Damned Electronics).
The extra weight has to cost some hp, did some calculations but didn't get to far.
Running a common melt down rail I'll take the HP hit for peace of mind.
__________________
Basically stock if I would have built it at the factory.....
|
|
|
02-08-2010, 09:57 PM
|
#12
|
Name: John Robinson
Title: Too Much Time
Status: Not Here
Join Date: Dec 2006
Location: Weatherford, Tx.
Member`s Gallery
Posts: 2,384
|
Quote:
Originally Posted by paint94979
may i ask what the ballpark price was for them?
|
above 500 & below 700 each. I know thats alot but they are well worth it IMO. If it means waiting a little longer & saving up for the purchase i would still buy them. It will more than likely be the last set of pistons you buy.
Quote:
Originally Posted by Joesixpack
Yeah, after decking the block .010 and using a thicker MLS with the .044 crush thickness, it worked out right around the 15.1:1. Which is were I wanted to be for that 1k+.
Balanced it to 0grams and it is amazing how smooth it runs at 4k (Damned Electronics).
The extra weight has to cost some hp, did some calculations but didn't get to far.
Running a common melt down rail I'll take the HP hit for peace of mind.
|
Sounds good Joe.
__________________
"Ask any American Indian what will happen to this country if we dont control immigration."
|
|
|
02-08-2010, 10:05 PM
|
#13
|
Name: SKYNYRD
Title: "Drunkard"
Status: Not Here
Join Date: May 2007
Location: Harpers Ferry, WV
Member`s Gallery
Posts: 5,665
|
like i said john they need a set of 6.7 pistons and i would be breaking the bank. you have made me feel better about the rods i have now.
__________________
Leonard
79 VW rabbit diesel (ALH & 4motion )
04.5 rclb 4x4
01 & 03 VW Golf TDI
05 rcsb 2wd (in progress )
ROSKOE115: "It's ain't avatar material but I'd hit it!"
|
|
|
02-08-2010, 10:27 PM
|
#14
|
Name: paint94979
Title: Too Much Time
Status: Not Here
Join Date: Jun 2007
Member`s Gallery
Posts: 317
|
Quote:
Originally Posted by John Robinson
above 500 & below 700 each. I know thats alot but they are well worth it IMO. If it means waiting a little longer & saving up for the purchase i would still buy them. It will more than likely be the last set of pistons you buy.
Sounds good Joe.
|
Thank you i appreciate the honesty... that doesn't seem too bad for pistons that have lasted up to what you have put them through. Any idea how many passes you have made with them?
|
|
|
02-08-2010, 11:37 PM
|
#15
|
Name: John Robinson
Title: Too Much Time
Status: Not Here
Join Date: Dec 2006
Location: Weatherford, Tx.
Member`s Gallery
Posts: 2,384
|
Quote:
Originally Posted by stock600
Thier cool thats for sure John, glad thier working well also. Id talked to Eric ealier in the year about doing some for me in a 12v design and he said they'd just be to damn heavy to make, he seen no way at the time 'due to the offset bowl' to make them come in under 11 pounds each -wow-. The same 2200+ degrees ive ran this summer sure tore up more crap 'alum' slugs than your steel units, so ya for the 24v guys that abuse them Id say try them. .026" down... hum Im .028" out of the hole , we'll see.?.
|
I hear rumors of a guy named Keaton that has the ability to make these pistons work in a 12 valve.....If anybody could it would be him.
__________________
"Ask any American Indian what will happen to this country if we dont control immigration."
|
|
|
02-09-2010, 12:01 AM
|
#16
|
Name: TMONEYDIESEL
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Jan 2007
Member`s Gallery
Posts: 8,706
|
Micheal Keaton? As in Batman?
I was ordering a set about a year ago or more and they had one set left that someone had called dibs on, when they told the person I wanted them they bought them. So Im waiting on the lighter set now.
__________________
MANNING MOTORSPORTS
Office +1 (512) 217-7644
YOUR SOURCE FOR:
Camshafts
Pushrods
Valve springs
Custom Turbos
Exhaust Manifolds
Carrillo Connecting rods
|
|
|
02-09-2010, 09:16 PM
|
#17
|
Name: Blacksdieselhp
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Jan 2008
Member`s Gallery
Posts: 2,569
|
Definately keep us posted on the new ones John. I am ready to buy a set as sonn as they are available.
|
|
|
02-10-2010, 06:59 AM
|
#18
|
Name: John Robinson
Title: Too Much Time
Status: Not Here
Join Date: Dec 2006
Location: Weatherford, Tx.
Member`s Gallery
Posts: 2,384
|
Quote:
Originally Posted by paint94979
Thank you i appreciate the honesty... that doesn't seem too bad for pistons that have lasted up to what you have put them through. Any idea how many passes you have made with them?
|
We did 10 events last year & 9 the year before. Add up all the test sessions & around 100 would be a safe bet.
Quote:
Originally Posted by stock600
Thier cool thats for sure John, glad thier working well also. Id talked to Eric ealier in the year about doing some for me in a 12v design and he said they'd just be to damn heavy to make, he seen no way at the time 'due to the offset bowl' to make them come in under 11 pounds each -wow-. The same 2200+ degrees ive ran this summer sure tore up more crap 'alum' slugs than your steel units, so ya for the 24v guys that abuse them Id say try them. .026" down... hum Im .028" out of the hole , we'll see.?.
|
Correction: They are .024 down in the hole. Best i recall they have a set of 12v already?
__________________
"Ask any American Indian what will happen to this country if we dont control immigration."
|
|
|
02-10-2010, 07:34 AM
|
#19
|
Name: mikmaze
Title: Too Much Time
Status: Not Here
Join Date: Apr 2009
Location: Fairfield NJ
Member`s Gallery
Posts: 4,292
|
truly impressive, anything else downstream take a hit from those temps ? seems the blades on the hot side would not be too happy.
__________________
04.5 Qcab shorty EVIL TWIN CP3's 100 % over nozzles, ats 3 piece, HTT 64 71 13 ss over S480, arp's , GOEREND , Hamilton 181 210 & valve springs, UDC beta
2006 Liberty CRD w/ GDE eco
'91 JD 1070 dzl
|
|
|
02-10-2010, 08:46 AM
|
#20
|
Name: Dalpilot
Title: Joe Nobody!
Status: Not Here
Join Date: Apr 2006
Location: Austin, Texas
Member`s Gallery
Posts: 11,373
|
I think that would Be "Keaton" Shelly. Some folks call him by his name, Keating Shelly, but the Aledo area of Texas tends to not get it right.
John, those pistons look familiar for some reason. There simply is no replacement for a quality part. WIth the beating those have taken, they are well worth the investment.
__________________
2017 White f-250 COMPETITIONDIESEL.COM Bringing the best together
|
|
|
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 02:34 PM.
|