Competition MLS Revisited

[justinp20012500]

Can someone shed some light and tell me I am seeing things.

I just got done doing a Haisley Fire Rings and 12mm studs.

I have every gasket you can think of for a Cummins (What comes standard in any dodge truck, I dont know about the RV275's or the 300's????).

I have compared the two types of Head Gaskets and can tell that there is one water jaket that is different from the 98. 5 - 02 to the 03 - 04. 5.

What are you guys doing to make the MLS fit the VP equiped trucks?? How are they modified??

I am asking this over here because I can't get a straight anwser out of Don.

(Edit to rephrase the question... ) Don choose to reply to the post and let every one know that it will work.

Heres the link...

http://www.dieseltruckresource.com/dev/showthread.php?s=&threadid=55752&perpage=15&pagenumber=1


Justin-

 

[COMP461]

There are 2 different head gaskets , one will leak water from the front , it is for the common rail motor , but dodge miss package it in the older number, . sucks . the ARP 2000 studs are Imo the best and easiest to use, because of the hex head in the end to install them. I use a stock head gasket with an o ring , if this is done right it doesn’t leak, what I thought was a head gasket leak was a leaking oil cooler. The fire rings are a waste of time and money , if you cant hold in a diesel with a proper installed o ring and head gasket you running the motor wrong. A top fuel motor uses the same combustion containment as this o ring and gasket , Ray little at RAYMAC racing engines can do a great job 817 477 0682

 

[Sled Puller]

From a Hilljack that won't lead you wrong, or be uppity about it:



"3958645 is the MLS gasket I have. Properly machined (BOTH) surfaces are the key to a happy head gasket life of good containment. "



From thread:



http://www.nwbombers.com/cgi-bin/forum/ikonboard.cgi?;act=ST;f=3;t=9944;hl=kta;st=16

 

[lmills]

Thanks for the tip sleddy. It seems as though some of the vendors that should be happy to see customers succeed would rather have them run in circles trying to figure it out on their own.

 

[JDailey]

Hey COMP... . explain your theory about fire rings being a waste and people other than you and RAYMAC not knowing how to set up diesel motor.

 

[Sled Puller]

Heres a stupid question, what kind of cylinder pressures does a Top Fuel engine create?

 

[COMP461]

Actually I do know the answer , I have been involved with a data logger , where we put piezoe sensors in the combustion chamber. And took samples every 1/10 of a degree of crank rotation. The range is around peak of 2000 to 2800 PSI, in reality a nitro motor makes less peak pressure then a top alcohol motor , just makes it longer. A diesel is a relative slow burn , as far as flame propagation and kernel development. But a diesel develops a better average effective pressure . most of the diesel combustion containment problems arise from loading the motor down around peak torque, where cylinder pressure are greatest , and when you lean harder on it in that low of an rpm you break things. That the short version. The PRO STOCK CAR this system was on , at the time had a number 1 on it.

 

[JDailey]

Looks like COMP went to the library today! Please explain that theory again, so this white trash redneck can understand it.

 

[COMP461]

Real simple, at slow speeds the cylinder pressure need to make big hp is also making big pressure, and this is the reason for not keeping head gaskets. One easy deal, REV IT UP the cylinder pressure needed to make big hp is proportionately less the higher you rev it

 

[JDailey]

And what kind of boost are you making to come up with this theory of yours?

 

[COMP461]

right around a 100 psi with about 90 psi drive. haven't hurt a head gasket yet , had a oil cooler leak, and thought it was one , but the containment was intact. for extra measure I will go to a copper gasket with a o ring and receiver grove. I haven't leaned on this motor yet , I have as of yet notused a large amount of Nitrous or water . the little truck is going to run in the 7 second range this year , the numbers we are getting on splits are showing around 8. 30's now . we picked up . 18 in the 330 at houstion , and the track was really slick. that pass would have netted a 5. 25 to 5. 30 1/8 and with any kind of back half it would have been a high 8. 30 , use that number on the hp to weight dream wheel and you come up with about 975

 

[JDailey]

Sounds like it is working for you. I still don't agree with your theory, though. We have been using fire rings and C-rings in diesel pulling tractors for years. And then it became necessary in these B motors. Simply because O-rings won't cut it. Now the alky supers are a different story. Copper gasket and an o-ring is all it takes. Good luck to ya, COMP.